Version 2.4.2.

* NEWS (2.4.2): Set version and date.  For the recent test suite
portability fixes, don't be so optimistic about their success
given the lack of feedback on the affected platforms.

.cvsignore

@@ -0,0 +1,32 @@
+*.cache
+*.flc
+*.prj
+*~
+.tarball-version
+.version
+ABOUT-NLS
+COPYING
+GNUmakefile
+INSTALL
+Makefile
+Makefile.in
+_*
+a.exe
+a.out
+aclocal.m4
+b.out
+bison-*
+conf[0-9]*
+confdefs*
+config.log
+config.status
+configure
+configure.lineno
+conftest*
+gnulib
+javacomp.sh
+javaexec.sh
+maint.mk
+patches
+releases
+stamp-h*

.gitattributes

@@ -1,2 +1 @@
-*.at   diff=autotest
-*.texi diff=texinfo
+ChangeLog merge=merge-changelog

.gitconfig

@@ -1,12 +0,0 @@
-# To use this gitconfig file, run
-#
-# git config --local include.path ../.gitconfig
-#
-# It adds an `[include]` section in .git/config.
-# See <https://git-scm.com/docs/git-config#_includes>.
-
-[diff "autotest"]
-        xfuncname = "^((m4_define|m4_pushdef|AT_SETUP).*)$"
-
-[diff "texinfo"]
-        xfuncname = "^@node .*$"

.gitignore

@@ -1,37 +1,21 @@
-*.a
-*.bak
-*.diff
-*.exe
-*.log
-*.o
-*.orig
-*.out
-*.output
-*.pdf
-*.rej
-*.stamp
-*.tmp
-*.trs
-*~
-.deps/
-.dirstamp
 /*.cache
 /*.flc
 /*.prj
+/*~
 /.tarball-version
 /.version
 /ABOUT-NLS
 /COPYING
-/ChangeLog
 /GNUmakefile
 /INSTALL
 /Makefile
 /Makefile.in
-/README-release
 /_*
+/a.exe
+/a.out
 /aclocal.m4
+/b.out
 /bison-*
-/build-aux/move-if-change
 /conf[0-9]*
 /confdefs*
 /config.log

.gitmodules

@@ -1,6 +1,3 @@
 [submodule "gnulib"]
 	path = gnulib
 	url = git://git.savannah.gnu.org/gnulib.git
-[submodule "submodules/autoconf"]
-	path = submodules/autoconf
-	url = git://git.sv.gnu.org/autoconf.git

.prev-version

@@ -1 +1 @@
-3.8.2
+2.3b

.travis.yml

@@ -1,575 +0,0 @@
-version: ~> 1.0
-
-# If the language is set to C or C++, Travis defines and exports CC
-# and CXX *after* we have defined our environment variables via 'env'.
-language: minimal
-
-# Run in two steps:
-# 1. Build the tarball
-#    On a modern distro, with all the needed dependencies, including the whole git history.
-# 2. Check it on various environments.
-#    Less dependencies, and little git content (we would like to have none, but it's not
-#    an option on Travis).
-stages:
-  - dist
-  - check
-
-# The 'check' jobs do not need the repo at all, only the 'dist'
-# does.  Let's save time, bandwith, energy, and polar bears.
-git:
-  clone: false
-
-# matrix.include and jobs.include are aliases
-# (https://docs.travis-ci.com/user/conditional-builds-stages-jobs/).
-jobs:
-  include:
-    - stage: dist
-      name: "Make dist"
-      git:
-        clone: true
-      dist: bionic
-      script:
-        - sudo apt-get install -qq autoconf automake autopoint flex gettext gperf graphviz help2man m4 texinfo
-        - autoconf --version
-        - automake --version
-        - autopoint --version
-        - dot -V
-        - gettext --version
-        - gperf --version
-        - help2man --version
-        - makeinfo --version
-        - m4 --version
-
-        # Travis makes a shallow clone, but we need it in full to build the ChangeLog and apply the fixes in git-log-fix.
-        - git fetch --unshallow || true
-        - git submodule update --init --recursive
-
-        # As of 2021-08, we don't have Autoconf 2.71 on Ubuntu.
-        - sed -i 's/AC_PREREQ(\[2\.71])/AC_PREREQ([2.69])/g' configure.ac
-        - ./bootstrap
-        - ./configure --enable-gcc-warnings || { cat config.log && false; }
-        - make -j2
-        - make -j2 dist-xz
-        # Can help understanding why we get "dirty" tarballs.
-        - git status
-        - git diff
-        - dist=$(echo bison*.xz)
-
-        # Unfortunately we cannot deterministically know the name of the tarball without the full
-        # git history (because git describe --abbrev=4 may use more than 4 characters if there are
-        # conflicts).
-        #
-        # So for the sake of the 'check' jobs (that don't even have the repo at all), also expose this
-        # tarball on a name that only depends on the Travis build number.
-        #
-        # Without -b -, exit status is always 0.
-        #
-        # If we rerun a job that was already uploaded, 'ln -s' will fail: remove beforehand.
-        - sftp -b - [email protected] <<< "put $dist"$'\n'"-rm bison-$TRAVIS_BUILD_NUMBER.tar.xz"$'\n'"ln -s $dist bison-$TRAVIS_BUILD_NUMBER.tar.xz"
-
-    ## ------- ##
-    ## First.  ##
-    ## ------- ##
-
-    # Start with three completely different environments, to get errors asap.
-
-    - name: "GCC 11 -O3"
-      stage: check
-      os: linux
-      dist: bionic
-      addons: &gcc11
-        apt:
-          sources:
-            # See https://github.com/travis-ci/apt-source-safelist/issues/410.
-            - sourceline: 'ppa:ubuntu-toolchain-r/test'
-          packages: g++-11
-      env:
-        - CC=gcc-11
-        - CXX=g++-11
-        - CONFIGUREFLAGS='CPPFLAGS=-DNDEBUG CFLAGS=-O3 CXXFLAGS=-O3'
-
-    # ASAN is time consuming, and we timeout the 50min granted by
-    # Travis if we run all the tests in one go.  Run in two parts.
-    - name: "Clang 11 libc++ and ASAN part 1"
-      stage: check
-      os: linux
-      dist: bionic
-      addons: &clang11
-        apt:
-          sources:
-            # See https://github.com/travis-ci/apt-source-safelist/issues/410.
-            - sourceline: 'ppa:ubuntu-toolchain-r/test'
-            - sourceline: 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-11 main'
-              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
-          packages:
-            - clang-11
-            - libc++-11-dev
-            - libc++abi-11-dev
-      env:
-        # Do not use ASAN with ubuntu's libc++: https://bugs.llvm.org/show_bug.cgi?id=17379
-        - CC='clang-11 -fsanitize=address'
-        - CXX='clang++-11 -fsanitize=address -stdlib=libc++'
-        - PART=1
-
-    - name: "Clang 11 libc++ and ASAN part 2"
-      stage: check
-      os: linux
-      dist: bionic
-      addons: *clang11
-      env:
-        # Do not use ASAN with ubuntu's libc++: https://bugs.llvm.org/show_bug.cgi?id=17379
-        - CC='clang-11 -fsanitize=address'
-        - CXX='clang++-11 -fsanitize=address -stdlib=libc++'
-        - PART=2
-
-    # See https://github.com/simd-everywhere/simde/blob/master/.travis.yml
-    # and https://software.intel.com/content/www/us/en/develop/documentation/get-started-with-intel-oneapi-render-linux/top/configure-your-system.html.
-    - name: "ICC"
-      stage: check
-      os: linux
-      compiler: icc
-      env:
-        - CC=icc
-        - CXX=icpc
-      install:
-        - source /opt/intel/oneapi/compiler/latest/env/vars.sh
-      addons:
-        apt:
-          sources:
-          - sourceline: 'deb https://apt.repos.intel.com/oneapi all main'
-            key_url: 'https://apt.repos.intel.com/intel-gpg-keys/GPG-PUB-KEY-INTEL-SW-PRODUCTS-2023.PUB'
-          packages:
-          - intel-oneapi-icc
-
-    - name: "ARM64: GCC 11 -O2 part 1"
-      stage: check
-      os: linux
-      arch: arm64
-      dist: bionic
-      addons: *gcc11
-      env:
-        - CC=gcc-11
-        - CXX=g++-11
-        - CONFIGUREFLAGS='CPPFLAGS=-DNDEBUG CFLAGS=-O2 CXXFLAGS=-O2'
-        - PART=1
-
-    - name: "PPC64le: GCC 11 -O2 part 1"
-      stage: check
-      os: linux
-      arch: ppc64le
-      dist: bionic
-      addons:
-        apt:
-          sources:
-            # See https://github.com/travis-ci/apt-source-safelist/issues/410.
-            - sourceline: 'ppa:ubuntu-toolchain-r/test'
-          packages: g++-11
-      env:
-        - CC=gcc-11
-        - CXX=g++-11
-        - CONFIGUREFLAGS='CFLAGS=-O2 CXXFLAGS=-O2'
-        - PART=1
-
-    - name: "s390x: GCC 11 -O2 part 1"
-      stage: check
-      os: linux
-      arch: s390x
-      dist: bionic
-      addons: *gcc11
-      env:
-        - CC=gcc-11
-        - CXX=g++-11
-        - CONFIGUREFLAGS='CFLAGS=-O2 CXXFLAGS=-O2'
-        - PART=1
-
-    ## ----- ##
-    ## GCC.  ##
-    ## ----- ##
-
-    - name: "GCC 10 with sanitizers part 1"
-      stage: check
-      os: linux
-      dist: bionic
-      addons:
-        apt:
-          sources:
-            # See https://github.com/travis-ci/apt-source-safelist/issues/410.
-            - sourceline: 'ppa:ubuntu-toolchain-r/test'
-          packages: g++-10
-      env:
-        - CC='gcc-10 -fsanitize=undefined,address -fno-omit-frame-pointer'
-        - CXX='g++-10 -fsanitize=undefined,address -fno-omit-frame-pointer'
-        - CONFIGUREFLAGS='CFLAGS=-O1 CXXFLAGS=-O1'
-        - PART=1
-
-    # With glr2.cc, we run out of time with the full test suite.
-    - name: "GCC 9 part 1"
-      stage: check
-      os: linux
-      dist: bionic
-      addons:
-        apt:
-          sources:
-            # See https://github.com/travis-ci/apt-source-safelist/issues/410.
-            - sourceline: 'ppa:ubuntu-toolchain-r/test'
-          packages: g++-9
-      env:
-        - CC=gcc-9
-        - CXX=g++-9
-        - PART=1
-
-    # With glr2.cc, we run out of time with the full test suite.
-    - name: "GCC 8 part 1"
-      stage: check
-      os: linux
-      dist: bionic
-      addons:
-        apt:
-          packages: g++-8
-      env:
-        - CC=gcc-8
-        - CXX=g++-8
-        - PART=1
-
-    - name: "GCC 7"
-      stage: check
-      os: linux
-      dist: bionic
-      addons:
-        apt:
-          packages: g++-7
-      env:
-        - CC=gcc-7
-        - CXX=g++-7
-
-    - name: "GCC 6"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources: ubuntu-toolchain-r-test
-          packages: g++-6
-      env:
-        - CC=gcc-6
-        - CXX=g++-6
-
-    - name: "GCC 5"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources: ubuntu-toolchain-r-test
-          packages: g++-5
-      env:
-         - CC=gcc-5
-         - CXX=g++-5
-
-    - name: "GCC 4.9"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources: ubuntu-toolchain-r-test
-          packages: g++-4.9
-      env:
-         - CC=gcc-4.9
-         - CXX=g++-4.9
-
-    - name: "GCC 4.8"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources: ubuntu-toolchain-r-test
-          packages: g++-4.8
-      env:
-         - CC=gcc-4.8
-         - CXX=g++-4.8
-
-    - name: "GCC 4.7"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources: ubuntu-toolchain-r-test
-          packages: g++-4.7
-      env:
-         - CC=gcc-4.7
-         - CXX=g++-4.7
-
-    - name: "GCC 4.6"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources: ubuntu-toolchain-r-test
-          packages: g++-4.6
-      env:
-         - CC=gcc-4.6
-         - CXX=g++-4.6
-
-    ## ------- ##
-    ## Clang.  ##
-    ## ------- ##
-
-    - name: "Clang 10 -O3, libc++, part 1"
-      stage: check
-      os: linux
-      dist: bionic
-      addons:
-        apt:
-          sources:
-            # See https://github.com/travis-ci/apt-source-safelist/issues/410.
-            - sourceline: 'ppa:ubuntu-toolchain-r/test'
-            - sourceline: 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-10 main'
-              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
-          packages:
-            - clang-10
-            - libc++-10-dev
-            - libc++abi-10-dev
-      env:
-        - CC='clang-10'
-        - CXX='clang++-10 -stdlib=libc++'
-        - CONFIGUREFLAGS='CPPFLAGS=-DNDEBUG CFLAGS=-O3 CXXFLAGS=-O3'
-        - PART=1
-
-    - name: "Clang 9 and libc++"
-      stage: check
-      os: linux
-      dist: bionic
-      addons:
-        apt:
-          sources:
-            # See https://github.com/travis-ci/apt-source-safelist/issues/410.
-            - sourceline: 'ppa:ubuntu-toolchain-r/test'
-            - sourceline: 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-9 main'
-              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
-          packages:
-            - clang-9
-            - libc++-9-dev
-            - libc++abi-9-dev
-      env:
-        - CC='clang-9'
-        - CXX='clang++-9 -stdlib=libc++'
-
-    - name: "Clang 8 and libc++"
-      stage: check
-      os: linux
-      dist: bionic
-      addons:
-        apt:
-          packages:
-            - clang-8
-            - libc++-8-dev
-            - libc++abi-8-dev
-      env:
-        - CC=clang-8
-        - CXX='clang++-8 -stdlib=libc++'
-
-    - name: "Clang 7 and libc++"
-      stage: check
-      os: linux
-      dist: bionic
-      addons:
-        apt:
-          packages:
-            - clang-7
-            - libc++-7-dev
-            - libc++abi-7-dev
-      env:
-        - CC=clang-7
-        - CXX='clang++-7 -stdlib=libc++'
-
-    - name: "Clang 6 and libc++"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources:
-            - llvm-toolchain-xenial-6.0
-            - ubuntu-toolchain-r-test
-          packages:
-            - clang-6.0
-            - libc++-dev
-      env:
-        - CC=clang-6.0
-        - CXX='clang++-6.0 -stdlib=libc++'
-
-    - name: "Clang 5"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources: llvm-toolchain-xenial-5.0
-          packages:
-            - clang-5.0
-            - libc++-dev
-      env:
-        - CC='clang-5.0'
-        - CXX='clang++-5.0'
-
-    - name: "Clang 4"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources: llvm-toolchain-xenial-4.0
-          packages: clang-4.0
-      env:
-        - CC=clang-4.0
-        - CXX=clang++-4.0
-
-    - name: "Clang 3.9"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources: llvm-toolchain-xenial-3.9
-          packages: clang-3.9
-      env:
-        - CC=clang-3.9
-        - CXX=clang++-3.9
-
-    - name: "Clang 3.8"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-precise-3.8
-          packages: clang-3.8
-      env:
-        - CC=clang-3.8
-        - CXX=clang++-3.8
-
-    - name: "CLang 3.7"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-precise-3.7
-          packages: clang-3.7
-      env:
-        - CC=clang-3.7
-        - CXX=clang++-3.7
-
-    - name: "Clang 3.6"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-precise-3.6
-          packages: clang-3.6
-      env:
-        - CC=clang-3.6
-        - CXX=clang++-3.6
-
-    - name: "Clang 3.5"
-      stage: check
-      os: linux
-      dist: xenial
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-            - llvm-toolchain-precise-3.5
-          packages: clang-3.5
-      env:
-        - CC=clang-3.5
-        - CXX=clang++-3.5
-
-    - name: "Clang 3.4"
-      stage: check
-      os: linux
-      # Not available on Xenial.
-      dist: trusty
-      addons:
-        apt:
-          packages: clang-3.4
-      env:
-        # No versioned name installed, but beware that Travis installs
-        # a more modern clang earlier in the default PATH.
-        - CC=/usr/bin/clang
-        - CXX=/usr/bin/clang++
-
-    - name: "Clang 3.3"
-      stage: check
-      os: linux
-      # Not available on Xenial.
-      dist: trusty
-      addons:
-        apt:
-          packages: clang-3.3
-      env:
-        # See comment for 3.4.
-        - CC=/usr/bin/clang
-        - CXX=/usr/bin/clang++
-
-## From https://docs.gitlab.com/ce/ci/ssh_keys/#ssh-keys-when-using-the-docker-executor.
-## Applies to Travis too.  Applied to all the 'script's (of all the jobs).
-before_script:
-  - 'which ssh-agent || ( sudo apt-get install openssh-client -y )'
-  - eval "$(ssh-agent -s)"
-  # $SSH_PRIVATE_KEY is multiline.  Use $'...' to register its value: $'-----BEGIN OPENSSH PRIVATE KEY-----\nXXXXX...\n...==\n-----END OPENSSH PRIVATE KEY-----'.
-  - echo "$SSH_PRIVATE_KEY" >/tmp/key.id_rsa
-  - chmod 600 /tmp/key.id_rsa
-  - ssh-add /tmp/key.id_rsa </dev/null
-  - mkdir -p ~/.ssh
-  - chmod 700 ~/.ssh
-  - echo '|1|bpc51UGxoDZjCPiwRlCStW32trI=|rfh6mLoLZv/vAvOVrpZXI1hTLxg= ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBIR+ckMoJTNXHvAQLHWSfrRnrNJGW2ZR6kr5pBVDGCkz1v1RcQ5rleq0NAt9kS3v4hgnuLiEVnK7KDRzcEH3ikc=' >>~/.ssh/known_hosts
-  - chmod 600 ~/.ssh/known_hosts
-
-# Applies only to the jobs that don't have a 'script', i.e., applies to all the 'check' jobs, but not the 'dist' one.
-script:
-  # Beware not too leak $SSH_PRIVATE_KEY.
-  # - env
-  - sudo apt-get install -qq doxygen flex m4
-  # Install and activate dmd.
-  - mkdir -p ~/dlang && wget https://dlang.org/install.sh -O ~/dlang/install.sh
-  - source $(source ~/dlang/install.sh dmd -a) || true
-
-  - $CC --version
-  - $CXX --version
-  - dmd --version || true
-  - doxygen --version
-  - flex --version
-  - ld --version
-  - m4 --version
-
-  - if [[ -f ~/.bashrc ]]; then source ~/.bashrc; fi
-  # Unset this variable, otherwise, Java programs' stderr is cluttered
-  # with `Picked up _JAVA_OPTIONS: -Xmx2048m -Xms512m`, which makes
-  # the test suite fail.
-  - unset _JAVA_OPTIONS
-
-  # Fail fast from now on.
-  - set -e
-  - sftp [email protected]:bison-$TRAVIS_BUILD_NUMBER.tar.xz
-  - tar xf bison-$TRAVIS_BUILD_NUMBER.tar.xz
-  - dir=$(tar tf bison-$TRAVIS_BUILD_NUMBER.tar.xz | sed 1q)
-  - cd $dir
-  - mkdir _build
-  - cd _build
-  - ../configure --enable-gcc-warnings CC="$CC" CXX="$CXX" $CONFIGUREFLAGS || { cat config.log && false; }
-  - make -j2 $MAKE_ARGS
-  - if test ${PART-1} = 1; then make check                  VERBOSE=1 TESTSUITEFLAGS=-j2 || { cat test-suite.log && cat tests/testsuite.log && false; }; fi
-  - if test ${PART-2} = 2; then make maintainer-check-posix VERBOSE=1 TESTSUITEFLAGS=-j2 || { cat tests/testsuite.log && false; }; fi
-  - if test ${PART-2} = 2; then make maintainer-check-g++   VERBOSE=1 TESTSUITEFLAGS=-j2 || { cat tests/testsuite.log && false; }; fi

.x-update-copyright

@@ -1,6 +1,6 @@
 COPYING
-^bootstrap$
 ^doc/fdl\.texi$
 ^doc/gpl-3\.0\.texi$
 ^doc/yacc\.1\.in$
 ^src/parse-gram\.h$
+^data/m4sugar/

AUTHORS

@@ -5,39 +5,4 @@ Bison was written primarily by Robert Corbett.
 Richard Stallman made it Yacc-compatible.
 
 Wilfred Hansen of Carnegie Mellon University added multicharacter
-string literals and other features (Bison 1.25, 1995).
-
-Akim Demaille rewrote the parser in Bison, and changed the back end to
-use M4 (1.50, 2002).
-
-Paul Hilfinger added GLR support (Bison 1.50, 2002).
-
-Joel E. Denny contributed canonical-LR support, and invented and added
-IELR and LAC (Lookahead Correction) support (Bison 2.5, 2011).
-
-Paolo Bonzini contributed Java support (Bison 2.4, 2008).
-
-Alex Rozenman added named reference support (Bison 2.5, 2011).
-
-Paul Eggert fixed a million portability issues, arbitrary limitations,
-and nasty bugs.
-
------
-
-Copyright (C) 1998-2015, 2018-2022, 2025-2026 Free Software Foundation,
-Inc.
-
-This file is part of Bison, the GNU Compiler Compiler.
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <https://www.gnu.org/licenses/>.
+string literals and other features.

COPYING

@@ -1,7 +1,7 @@
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -645,7 +645,7 @@ the "copyright" line and a pointer to where the full notice is found.
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
@@ -664,11 +664,11 @@ might be different; for a GUI interface, you would use an "about box".
   You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
-<https://www.gnu.org/licenses/>.
+<http://www.gnu.org/licenses/>.
 
   The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
-<https://www.gnu.org/licenses/why-not-lgpl.html>.
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

HACKING

@@ -0,0 +1,380 @@
+-*- outline -*-
+
+This file attempts to describe the rules to use when hacking Bison.
+Don't put this file into the distribution.
+
+Everything related to the development of Bison is on Savannah:
+
+        http://savannah.gnu.org/projects/bison/
+
+
+* Administrivia
+
+** If you incorporate a change from somebody on the net:
+First, if it is a large change, you must make sure they have signed
+the appropriate paperwork.  Second, be sure to add their name and
+email address to THANKS.
+
+** If a change fixes a test, mention the test in the ChangeLog entry.
+
+** Bug reports
+If somebody reports a new bug, mention his name in the ChangeLog entry
+and in the test case you write.  Put him into THANKS.
+
+The correct response to most actual bugs is to write a new test case
+which demonstrates the bug.  Then fix the bug, re-run the test suite,
+and check everything in.
+
+** You may find it useful to install the git-merge-changelog merge driver:
+
+  http://git.sv.gnu.org/gitweb/?p=gnulib.git;a=blob;f=lib/git-merge-changelog.c
+
+When following the generic installation instructions there, keep in mind that
+your clone of Bison's git repository already contains appropriate
+.gitattributes files, and running Bison's bootstrap script will make the
+necessary changes to .git/config.
+
+
+* Hacking
+
+** Visible changes
+Which include serious bug fixes, must be mentioned in NEWS.
+
+** Translations
+Only user visible strings are to be translated: error messages, bits
+of the .output file etc.  This excludes impossible error messages
+(comparable to assert/abort), and all the --trace output which is
+meant for the maintainers only.
+
+
+* Working from the repository
+
+These notes intend to help people working on the checked-out sources.
+These requirements do not apply when building from a distribution tarball.
+
+** Requirements
+
+We've opted to keep only the highest-level sources in the repository.
+This eases our maintenance burden, (fewer merges etc.), but imposes more
+requirements on anyone wishing to build from the just-checked-out sources.
+For example, you have to use the latest stable versions of the maintainer
+tools we depend upon, including:
+
+- Automake <http://www.gnu.org/software/automake/>
+- Autoconf <http://www.gnu.org/software/autoconf/>
+- Flex <http://www.gnu.org/software/flex/>
+- Gettext <http://www.gnu.org/software/gettext/>
+- Gzip <http://www.gnu.org/software/gzip/>
+- Perl <http://www.cpan.org/>
+- Rsync <http://samba.anu.edu.au/rsync/>
+- Tar <http://www.gnu.org/software/tar/>
+
+Valgrind <http://valgrind.org/> is also highly recommended, if
+Valgrind supports your architecture.
+
+Bison is written using Bison grammars, so there are bootstrapping
+issues.  The bootstrap script attempts to discover when the C code
+generated from the grammars is out of date, and to bootstrap with an
+out-of-date version of the C code, but the process is not foolproof.
+Also, you may run into similar problems yourself if you modify Bison.
+
+Only building the initial full source tree will be a bit painful.
+Later, after synchronizing from the repository a plain `make' should
+be sufficient.
+
+** First checkout
+
+Obviously, if you are reading these notes, you did manage to check out
+this package from the repository.  For the record, you will find all the
+relevant information on:
+
+        http://savannah.gnu.org/git/?group=bison
+
+Bison uses Git submodules: subscriptions to other Git repositories.
+In particular it uses gnulib, the GNU portability library.  To ask Git
+to perform the first checkout of the submodules, run
+
+       $ git submodule update --init
+
+Git submodule support is weak before versions 1.6 and later, you
+should probably upgrade Git if your version is older.
+
+The next step is to get other files needed to build, which are
+extracted from other source packages:
+
+        $ ./bootstrap
+
+And there you are!  Just
+
+        $ ./configure
+        $ make
+        $ make check
+
+At this point, there should be no difference between your local copy,
+and the master copy:
+
+        $ git diff
+
+should output no difference.
+
+Enjoy!
+
+** Updating
+
+The use of submodules make things somewhat different because git does
+not support recursive operations: submodules must be taken care of
+explicitly by the user.
+
+*** Updating Bison
+
+If you pull a newer version of a branch, say via `git pull', you might
+import requests for updated submodules.  A simple `git diff' will
+reveal if the current version of the submodule (i.e., the actual
+contents of the gnulib directory) and the current request from the
+subscriber (i.e., the reference of the version of gnulib that the
+Bison reporitory requests) differ.  To upgrade the submodules (i.e.,
+to check out the version that is actually requested by the subscriber,
+run `git submodule update'.
+
+        $ git pull
+        $ git submodule update
+
+*** Updating a submodule
+To update a submodule, say gnulib, do as follows:
+
+Get the most recent version of the master branch from git.
+
+        $ cd gnulib
+        $ git fetch
+        $ git checkout -b master --track origin/master
+
+Make sure Bison can live with that version of gnulib.
+
+        $ cd ..
+        $ ./bootstrap
+        $ make distcheck
+
+Register your changes.
+
+        $ git checkin ...
+
+
+* Test suite
+
+** make check
+Use liberally.
+
+** Release checks
+Try to run the test suite with more severe conditions before a
+release:
+
+- Configure the package with --enable-gcc-warnings, so that one checks
+  that 1. Bison compiles cleanly, 2. the parsers it produces compile
+  cleanly too.
+
+- run `make maintainer-check' which:
+  - runs `valgrind -q bison' to run Bison under Valgrind.
+  - runs the parsers under Valgrind.
+  - runs the test suite with G++ as C compiler...
+
+- run `make maintainer-push-check', which runs `make maintainer-check'
+  while activating the push implementation and its pull interface wrappers
+  in many test cases that were originally written to exercise only the
+  pull implementation.  This makes certain the push implementation can
+  perform every task the pull implementation can.
+
+- run `make maintainer-xml-check', which runs `make maintainer-check'
+  while checking Bison's XML automaton report for every working grammar
+  passed to Bison in the test suite.  The check just diffs the output of
+  Bison's included XSLT style sheets with the output of --report=all and
+  --graph.
+
+- Change tests/atlocal/CFLAGS to add your preferred options.  For
+  instance, `-traditional' to check that the parsers are K&R.  Note
+  that it does not make sense for glr.c, which should be ANSI,
+  but currently is actually GNU C, nor for lalr1.cc.
+
+
+* Release Procedure
+
+** Try to get the *.pot files to the Translation Project at least one
+week before a stable release, to give them time to translate them.
+Before generating the *.pot files, make sure that po/POTFILES.in and
+runtime-po/POTFILES.in list all files with translatable strings.
+This helps: grep -l '\<_(' *
+
+** Tests
+See above.
+
+** Update the foreign files
+Running `./bootstrap' in the top level should update them all for you.
+This covers PO files too.  Sometimes a PO file contains problems that
+causes it to be rejected by recent Gettext releases; please report
+these to the Translation Project.
+
+** Update README
+Make sure the information in README is current.  Most notably, make sure
+it recommends a version of GNU M4 that is compatible with the latest
+Bison sources.
+
+** Check copyright years.
+We update years in copyright statements throughout Bison once at the
+start of every year by running `make update-copyright'.  However, before
+a release, it's good to verify that it's actually been run.  Besides the
+copyright statement for each Bison file, check the copyright statements
+that the skeletons insert into generated parsers, and check all
+occurrences of PACKAGE_COPYRIGHT_YEAR in configure.ac.
+
+** Update NEWS
+The version number, *and* the date of the release (including for
+betas).
+
+** Update ChangeLog
+Should have an entry similar to `Version 1.49b.'.
+
+** Tag the release
+Before Bison will build with the right version number, you must tag the release
+in git.  Do this after all other changes.  The command is similar to:
+
+  git tag -a v2.3b
+
+The log message can be simply:
+
+  Bison 2.3b
+
+** Push
+Once `make distcheck' passes, push your changes and the tag.
+`git push' without arguments will not push the tag.
+
+** make alpha
+FIXME: `make alpha' is not maintained and is broken.  These
+instructions need to be replaced or removed.
+
+Running `make alpha' is absolutely perfect for beta releases: it makes
+the tarballs, the xdeltas, and prepares (in /tmp/) a proto
+announcement.  It is so neat, that that's what I use anyway for
+genuine releases, but adjusting things by hand (e.g., the urls in the
+announcement file, the ChangeLog which is not needed etc.).
+
+If it fails, you're on your own...
+
+It requires GNU Make.
+
+** Upload
+The generic GNU upload procedure is at:
+
+  http://www.gnu.org/prep/maintain/maintain.html#Automated-FTP-Uploads
+
+Follow the instructions there to register your information so you're permitted
+to upload.  Make sure your public key has been uploaded at least to
+keys.gnupg.net.  You can upload it with:
+
+  gpg --keyserver keys.gnupg.net --send-keys F125BDF3
+
+where F125BDF3 should be replaced with your key ID.
+
+Here's a brief reminder of how to roll the tarballs and upload them:
+
+*** make distcheck
+*** gpg -b bison-2.3b.tar.gz
+*** In a file named `bison-2.3b.tar.gz.directive', type:
+
+      version: 1.1
+      directory: bison
+      filename: bison-2.3b.tar.gz
+
+*** gpg --clearsign bison-2.3b.tar.gz.directive
+*** ftp ftp-upload.gnu.org # Log in as anonymous.
+*** cd /incoming/alpha # cd /incoming/ftp for full release.
+*** put bison-2.3b.tar.gz # This can take a while.
+*** put bison-2.3b.tar.gz.sig
+*** put bison-2.3b.tar.gz.directive.asc
+*** Repeat all these steps for bison-2.3b.tar.bz2.
+
+** Update Bison manual on www.gnu.org.
+
+*** You need a non-anonymous checkout of the web pages directory.
+
+  $ cvs -d [email protected]:/web/bison checkout bison
+
+*** Get familiar with the instructions for web page maintainers.
+http://www.gnu.org/server/standards/readme_index.html
+http://www.gnu.org/server/standards/README.software.html
+especially the note about symlinks.
+
+*** Build the web pages.
+Assuming BISON_CHECKOUT refers to a checkout of the Bison dir, and
+BISON_WWW_CHECKOUT refers to the web directory created above, do:
+
+  $ cd $BISON_CHECKOUT/doc
+  $ make stamp-vti
+  $ ../build-aux/gendocs.sh -o "$BISON_WWW_CHECKOUT/manual" \
+    bison "Bison - GNU parser generator"
+  $ cd $BISON_WWW_CHECKOUT
+
+Verify that the result looks sane.
+
+*** Commit the modified and the new files.
+
+*** Remove old files.
+Find the files which have not been overwritten (because they belonged to
+sections that have been removed or renamed):
+
+   $ cd manual/html_node
+   $ ls -lt
+
+Remove these files and commit their removal to CVS.  For each of these
+files, add a line to the file .symlinks.  This will ensure that
+hyperlinks to the removed files will redirect to the entire manual; this
+is better than a 404 error.
+
+There is a problem with 'index.html' being written twice (once for POSIX
+function 'index', once for the table of contents); you can ignore this
+issue.
+
+** Announce
+To generate a template announcement file:
+
+  make RELEASE_TYPE=alpha gpg_key_ID=F125BDF3 announcement
+
+where alpha can be replaced by beta or major and F125BDF3 should be replaced
+with your key ID.  For an example of how to fill out the template, search the
+mailing list archives for the most recent release announcement.
+
+Complete/fix the announcement file, and send it at least to
+[email protected] (if a real release, or a ``serious beta''),
+[email protected], [email protected], [email protected],
+and [email protected].
+
+Send the same announcement on the comp.compilers newsgroup by sending
+email to [email protected].  Do not make any Cc as the moderator will
+throw away anything cross-posted or Cc'ed.  It really needs to be a
+separate message.
+
+** Bump the version number
+In configure.ac.  Run `make'.  So that developers don't accidentally add new
+items to the old NEWS entry, create a new empty NEWS entry something like:
+
+  Changes in version ?.? (????-??-??):
+
+Push these changes.
+
+
+-----
+
+Copyright (C) 2002-2005, 2007-2010 Free Software Foundation, Inc.
+
+This file is part of GNU Bison.
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.

Makefile.am

@@ -1,8 +1,6 @@
-## Process this file with automake to produce Makefile.in.
+## Process this file with automake to produce Makefile.in -*-Makefile-*-
+## Copyright (C) 2001-2010 Free Software Foundation, Inc.
 
-# Copyright (C) 2001-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
-#
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
@@ -14,75 +12,35 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-AUTOMAKE_OPTIONS = subdir-objects
 ACLOCAL_AMFLAGS = -I m4
 
-SUBDIRS = po runtime-po gnulib-po .
+SUBDIRS = build-aux po runtime-po lib data src doc examples tests etc
 
 # Files installed for use by Automake.
 aclocaldir = @aclocaldir@
 aclocal_DATA = m4/bison-i18n.m4
 
-EXTRA_DIST = .prev-version .version cfg.mk PACKAGING \
-  ChangeLog-1998 ChangeLog-2012 ChangeLog
+EXTRA_DIST = .prev-version .version cfg.mk \
+  OChangeLog PACKAGING \
+  djgpp/Makefile.maint djgpp/README.in djgpp/config.bat \
+  djgpp/config.sed djgpp/config.site djgpp/config_h.sed \
+  djgpp/subpipe.c djgpp/subpipe.h djgpp/djunpack.bat \
+  djgpp/fnchange.lst djgpp/testsuite.sed
 
-dist_doc_DATA = AUTHORS COPYING NEWS README THANKS TODO
 
-# Let generated files (e.g., from examples/) depend on this variable,
-# to make sure they are regenerated when there are changes in Bison.
-#
-# Don't depend on $(BISON) otherwise we would rebuild these files
-# in srcdir, including during distcheck, which is forbidden.
-dependencies = $(BISON_IN) $(src_bison_SOURCES) $(dist_skeletons_DATA)
+.PHONY: maintainer-check
+maintainer-check:
+	cd tests && $(MAKE) $(AM_MAKEFLAGS) $@
 
-## Running the bison from this tarball.  To generate our own parser,
-## but also to run the tests.  Of course, you ought to keep a sane
-## version of Bison nearby...
-BISON = $(top_builddir)/tests/bison
-BISON_IN = $(top_srcdir)/tests/bison.in
-YACC = $(BISON) -o y.tab.c
-AM_YFLAGS_WITH_LINES = --defines -Werror -Wall,dangling-alias --report=all
-AM_YFLAGS = $(AM_YFLAGS_WITH_LINES) --no-lines
+.PHONY: maintainer-push-check
+maintainer-push-check:
+	cd tests && $(MAKE) $(AM_MAKEFLAGS) $@
 
-# Initialization before completion by local.mk's.
-AM_CFLAGS = $(WARN_CFLAGS)
-# Find builddir/src/scan-code.c etc.  For some reason "-I./lib"
-# instead of "-Ilib" avoids infinite recursions on #include_next.
-AM_CPPFLAGS = -I. -I./lib -I$(top_srcdir) -I$(top_srcdir)/lib
-BUILT_SOURCES =
-CLEANDIRS =
-CLEANFILES =
-DISTCLEANFILES =
-EXTRA_DIST += $(dist_TESTS)
-MOSTLYCLEANDIRS =
-MOSTLYCLEANFILES =
-SUFFIXES =
-TESTS = $(dist_TESTS)
-check_PROGRAMS =
-check_SCRIPTS =
-dist_TESTS =
-noinst_LIBRARIES =
-
-include build-aux/local.mk
-include data/local.mk
-include doc/local.mk
-include etc/local.mk
-include examples/local.mk
-include lib/local.mk
-include src/local.mk
-include tests/local.mk
-
-clean-local:
-	rm -rf $(CLEANDIRS)
-
-.PHONY: gitsort
-gitsort:
-	cd $(srcdir)							\
-	&& for i in $$(git ls-files '*.gitignore' | grep -v doc); do	\
-	  LC_ALL=C sort $$i -o $$i;					\
-	done
+.PHONY: maintainer-xml-check
+maintainer-xml-check:
+	cd tests && $(MAKE) $(AM_MAKEFLAGS) $@
 
 # See comments in build-aux/git-version-gen.  However, we make .version depend
 # on configure so that .version and VERSION/PACKAGE_VERSION stay in sync in the
@@ -93,58 +51,17 @@ gitsort:
 # a developer might naively reference .version in a test case while the bison
 # executable still compiles with VERSION, and so the test case might fail or
 # pass incorrectly.
-BUILT_SOURCES += $(top_srcdir)/.version
+BUILT_SOURCES = $(top_srcdir)/.version
 $(top_srcdir)/.version: configure
 	echo $(VERSION) > $@-t && mv $@-t $@
-dist-hook: gen-ChangeLog gen-synclines
+dist-hook:
 	echo $(VERSION) > $(distdir)/.tarball-version
 
-# When generating a release, include the #lines in Bison's parser.  Do it
-# only if needed.  In particular, distcheck runs dist with read-only
-# sources, so don't try to update src/parse-gram.c: we don't have the
-# permissions.
-.PHONY: gen-synclines
-gen-synclines:
-	cd $(distdir) &&						\
-	if ! grep '#line' src/parse-gram.c >/dev/null 2>&1; then	\
-	  $(abs_top_builddir)/tests/bison				\
-	    $(AM_YFLAGS_WITH_LINES) src/parse-gram.y			\
-	    -o src/parse-gram.c;					\
-	fi
-
 .PHONY: update-b4-copyright update-package-copyright-year
 update-b4-copyright:
-	$(AM_V_GEN)find $(srcdir)/data -type f          \
-	  | xargs $(srcdir)/build-aux/$@
+	find data -type f                    \
+	  | grep -v -E '^data/bison.m4$$'    \
+	  | xargs $(build_aux)/$@
 	@echo 'warning: src/parse-gram.[hc] may need to be regenerated.'
 update-package-copyright-year:
-	$(AM_V_GEN)$(srcdir)/build-aux/$@ $(srcdir)/configure.ac
-
-gen_start_date = 2012-01-16
-.PHONY: gen-ChangeLog
-gen-ChangeLog:
-	$(AM_V_GEN)if test -d $(srcdir)/.git; then	\
-	  cl=$(distdir)/ChangeLog &&			\
-	  rm -f $$cl.tmp &&				\
-	  $(top_srcdir)/build-aux/gitlog-to-changelog	\
-	    --strip-tab					\
-	    --strip-cherry-pick				\
-	    --no-cluster				\
-	    --amend=$(srcdir)/build-aux/git-log-fix	\
-	    --srcdir=$(srcdir)				\
-	    --since=$(gen_start_date) > $$cl.tmp &&	\
-	  mv -f $$cl.tmp $$cl;				\
-	fi
-
-# Useful to debug.
-.c.i:
-	$(CC) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -o $@ -E $<
-
-.PHONY: codespell
-CODESPELL = codespell
-codespell:
-	$(AM_V_GEN) cd $(srcdir) \
-	&& $(CODESPELL) \
-	     --regex "[\\w\\-'’\`]+\+*" \
-	     --ignore-words-list "ba,circularly,cloneable,copyable,define'd,dout,froms,iff,ifset,od,ois" \
-	     $$(git ls-files data doc lib src tests)
+	$(build_aux)/$@ configure.ac

OChangeLog

@@ -140,7 +140,7 @@
 1996-05-12  Jim Meyering  <[email protected]>
 
 	* src/bison.simple (__yy_memcpy) [__cplusplus]: Reorder declarations
-	of variables f and t.
+ 	of variables f and t.
 
 1996-05-11  Richard Stallman  <[email protected]>
 

PACKAGING

@@ -36,8 +36,7 @@ to the bison package.
 
 -----
 
-Copyright (C) 2002, 2005, 2009-2015, 2018-2022, 2025-2026 Free Software
-Foundation, Inc.
+Copyright (C) 2002, 2005, 2009-2010 Free Software Foundation, Inc.
 
 This file is part of Bison, the GNU Compiler Compiler.
 
@@ -52,4 +51,4 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
-along with this program.  If not, see <https://www.gnu.org/licenses/>.
+along with this program.  If not, see <http://www.gnu.org/licenses/>.

README

@@ -1,135 +1,59 @@
-GNU Bison is a general-purpose parser generator that converts an annotated
-context-free grammar into a deterministic LR or generalized LR (GLR) parser
-employing LALR(1) parser tables.  Bison can also generate IELR(1) or
-canonical LR(1) parser tables.  Once you are proficient with Bison, you can
-use it to develop a wide range of language parsers, from those used in
-simple desk calculators to complex programming languages.
+This package contains the GNU Bison parser generator.
 
-Bison is upward compatible with Yacc: all properly-written Yacc grammars
-work with Bison with no change.  Anyone familiar with Yacc should be able to
-use Bison with little trouble.  You need to be fluent in C, C++, D or Java
-programming in order to use Bison.
-
-Bison and the parsers it generates are portable, they do not require any
-specific compilers.
-
-GNU Bison's home page is https://gnu.org/software/bison/.
-
-# Installation
-## Build from git
-The [README-hacking.md file](README-hacking.md) is about building, modifying
-and checking Bison.  See its "Working from the Repository" section to build
-Bison from the git repo.  Roughly, run:
-
-    $ git submodule update --init
-    $ ./bootstrap
-
-then proceed with the usual `configure && make` steps.
-
-## Build from tarball
-See the [INSTALL file](INSTALL) for generic compilation and installation
+* Installation
+** Build
+See the file INSTALL for generic compilation and installation
 instructions.
 
-Bison requires GNU m4 1.4.6 or later.  See
-https://ftp.gnu.org/gnu/m4/m4-1.4.6.tar.gz.
+Bison requires GNU m4 1.4.6 or later.  See:
 
-## Running a non installed bison
-Once you ran `make`, you might want to toy with this fresh bison before
-installing it.  In that case, do not use `src/bison`: it would use the
-*installed* files (skeletons, etc.), not the local ones.  Use `tests/bison`.
+      ftp://ftp.gnu.org/gnu/m4/m4-1.4.6.tar.gz
 
-## Colored diagnostics
-As an experimental feature, diagnostics are now colored, controlled by the
-`--color` and `--style` options.
+** Internationalization
+Bison supports two catalogues: one for Bison itself (i.e., for the
+maintainer-side parser generation), and one for the generated parsers
+(i.e., for the user-side parser execution).  The requirements between
+both differ: bison needs ngettext, the generated parsers do not.  To
+simplify the build system, neither are installed if ngettext is not
+supported, even if generated parsers could have been localized.  See
+http://lists.gnu.org/archive/html/bug-bison/2009-08/msg00006.html for
+more details.
 
-To use them, install the libtextstyle library, 0.20.5 or newer, before
-configuring Bison.  It is available from https://alpha.gnu.org/gnu/gettext/,
-for instance https://alpha.gnu.org/gnu/gettext/libtextstyle-0.20.5.tar.gz,
-or as part of Gettext 0.21 or newer, for instance
-https://ftp.gnu.org/gnu/gettext/gettext-0.21.tar.gz.
+* Questions
+See the section FAQ in the documentation (doc/bison.info) for
+frequently asked questions.  The documentation is also available in
+PDF and HTML, provided you have a recent version of Texinfo installed:
+run "make pdf" or "make html".
 
-The option --color supports the following arguments:
-- always, yes: Enable colors.
-- never, no: Disable colors.
-- auto, tty (default): Enable colors if the output device is a tty.
+If you have questions about using Bison and the documentation does
+not answer them, please send mail to <[email protected]>.
 
-To customize the styles, create a CSS file, say `bison-bw.css`, similar to
+* Bug reports
+Please send bug reports to <[email protected]>.  Please include the
+version number from `bison --version', and a complete, self-contained
+test case in each bug report.
 
-    /* bison-bw.css */
-    .warning   { }
-    .error     { font-weight: 800; text-decoration: underline; }
-    .note      { }
-
-then invoke bison with `--style=bison-bw.css`, or set the `BISON_STYLE`
-environment variable to `bison-bw.css`.
-
-In some diagnostics, bison uses libtextstyle to emit special escapes to
-generate clickable hyperlinks.  The environment variable
-`NO_TERM_HYPERLINKS` can be used to suppress them.  This may be useful for
-terminal emulators which produce garbage output when they receive the escape
-sequence for a hyperlink. Currently (as of 2020), this affects some versions
-of emacs, guake, konsole, lxterminal, rxvt, yakuake.
-
-## Relocatability
-If you pass `--enable-relocatable` to `configure`, Bison is relocatable.
-
-A relocatable program can be moved or copied to a different location on the
-file system.  It can also be used through mount points for network sharing.
-It is possible to make symlinks to the installed and moved programs, and
-invoke them through the symlink.
-
-See "Enabling Relocatability" in the documentation.
-
-## Internationalization
-Bison supports two catalogs: one for Bison itself (i.e., for the
-maintainer-side parser generation), and one for the generated parsers (i.e.,
-for the user-side parser execution).  The requirements between both differ:
-bison needs ngettext, the generated parsers do not.  To simplify the build
-system, neither are installed if ngettext is not supported, even if
-generated parsers could have been localized.  See
-https://lists.gnu.org/r/bug-bison/2009-08/msg00006.html for more
-details.
-
-# Questions
-See the section FAQ in the documentation (doc/bison.info) for frequently
-asked questions.  The documentation is also available in PDF and HTML,
-provided you have a recent version of Texinfo installed: run `make pdf` or
-`make html`.
-
-If you have questions about using Bison and the documentation does not
-answer them, please send mail to <[email protected]>.
-
-# Bug reports
-Please send bug reports to <[email protected]>.  Be sure to include the
-version number from `bison --version`, and a complete, self-contained test
-case in each bug report.
-
-# Copyright statements
-For any copyright year range specified as YYYY-ZZZZ in this package, note
-that the range specifies every single year in that closed interval.
-
-<!--
-
-LocalWords:  parsers ngettext Texinfo pdf html YYYY ZZZZ ispell american md
-LocalWords:  MERCHANTABILITY GLR LALR IELR submodule init README src bw
-LocalWords:  Relocatability symlinks symlink
 
 Local Variables:
-mode: markdown
-fill-column: 76
-ispell-dictionary: "american"
+mode: outline
 End:
 
-Copyright (C) 1992, 1998-1999, 2003-2005, 2008-2015, 2018-2022,
-2025-2026 Free Software Foundation, Inc.
+-----
 
-This file is part of GNU bison, the GNU Compiler Compiler.
+Copyright (C) 1992, 1998-1999, 2003-2005, 2008-2010 Free Software
+Foundation, Inc.
 
-Permission is granted to copy, distribute and/or modify this document
-under the terms of the GNU Free Documentation License, Version 1.3 or
-any later version published by the Free Software Foundation; with no
-Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
-Texts.  A copy of the license is included in the "GNU Free
-Documentation License" file as part of this distribution.
+This file is part of Bison, the GNU Compiler Compiler.
 
--->
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.

README-alpha

@@ -12,8 +12,7 @@ the problems you encounter.
 
 -----
 
-Copyright (C) 2002, 2004, 2009-2015, 2018-2022, 2025-2026 Free Software
-Foundation, Inc.
+Copyright (C) 2002, 2004, 2009-2010 Free Software Foundation, Inc.
 
 This file is part of GNU Bison.
 
@@ -28,4 +27,4 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
-along with this program.  If not, see <https://www.gnu.org/licenses/>.
+along with this program.  If not, see <http://www.gnu.org/licenses/>.

README-hacking.md

@@ -1,679 +0,0 @@
-This file attempts to describe the rules to use when hacking Bison.
-Don't put this file into the distribution.
-
-Everything related to the development of Bison is on Savannah:
-https://savannah.gnu.org/projects/bison/.
-
-
-Working from the Repository
-===========================
-
-These notes intend to help people working on the checked-out sources.  These
-requirements do not apply when building from a distribution tarball.
-
-## Requirements
-
-We've opted to keep only the highest-level sources in the repository.  This
-eases our maintenance burden, (fewer merges etc.), but imposes more
-requirements on anyone wishing to build from the just-checked-out sources.
-For example, you have to use the latest stable versions of the maintainer
-tools we depend upon, including:
-
-- Autoconf <https://www.gnu.org/software/autoconf/>
-- Automake <https://www.gnu.org/software/automake/>
-- Flex <https://www.gnu.org/software/flex/>
-- Gettext <https://www.gnu.org/software/gettext/>
-- Gperf <https://www.gnu.org/software/gperf/>
-- Graphviz <https://www.graphviz.org>
-- Gzip <https://www.gnu.org/software/gzip/>
-- Help2man <https://www.gnu.org/software/help2man/>
-- Perl <https://www.cpan.org/>
-- Rsync <https://rsync.samba.org/>
-- Tar <https://www.gnu.org/software/tar/>
-- Texinfo <https://www.gnu.org/software/texinfo/>
-
-Valgrind <https://www.valgrind.org/> is also highly recommended, if it
-supports your architecture.
-
-If you're using a GNU/Linux distribution, the easiest way to install the
-above packages depends on your system.  The following shell command should
-work for Debian-based systems such as Ubuntu:
-
-    sudo apt-get install \
-      autoconf automake autopoint flex gperf graphviz help2man texinfo valgrind
-
-Bison is written using Bison grammars, so there are bootstrapping issues.
-The bootstrap script attempts to discover when the C code generated from the
-grammars is out of date, and to bootstrap with an out-of-date version of the
-C code, but the process is not foolproof.  Also, you may run into similar
-problems yourself if you modify Bison.
-
-Only building the initial full source tree will be a bit painful.  Later,
-after synchronizing from the repository a plain 'make' should be sufficient.
-Note, however, that when gnulib is updated, running './bootstrap' again
-might be needed.
-
-## First checkout
-
-Obviously, if you are reading these notes, you did manage to check out this
-package from the repository.  For the record, you will find all the relevant
-information on https://savannah.gnu.org/git/?group=bison.
-
-Bison uses Git submodules: subscriptions to other Git repositories.  In
-particular it uses gnulib, the GNU portability library.  To ask Git to
-perform the first checkout of the submodules, run
-
-    $ git submodule update --init
-
-The next step is to get other files needed to build, which are extracted
-from other source packages:
-
-    $ ./bootstrap
-
-Bootstrapping updates the submodules to the versions registered in the
-top-level directory.  To change gnulib, first check out the version you want
-in `gnulib`, then commit this change in Bison's repository, and finally run
-bootstrap.
-
-If it fails with missing symbols (e.g., `error: possibly undefined macro:
-AC_PROG_GNU_M4`), you are likely to have forgotten the submodule
-initialization part.  To recover from it, run `git reset --hard HEAD`, and
-restart with the submodule initialization.  Otherwise, there you are!  Just
-
-    $ ./configure
-    $ make
-    $ make check
-
-At this point, there should be no difference between your local copy, and
-the master copy:
-
-    $ git diff
-
-should output no difference.
-
-Enjoy!
-
-## Updating
-
-If you have git at version 1.8.2 or later, the command
-
-    $ git submodule update --recursive --remote
-
-will be useful for updating to the latest version of all submodules.
-
-Under earlier versions, use of submodules make things somewhat different
-because git does not yet support recursive operations: submodules must be
-taken care of explicitly.
-
-### Updating Bison
-
-If you pull a newer version of a branch, say via `git pull`, you might
-import requests for updated submodules.  A simple `git diff` will reveal if
-the current version of the submodule (i.e., the actual contents of the
-gnulib directory) and the current request from the subscriber (i.e., the
-reference of the version of gnulib that the Bison repository requests)
-differ.  To upgrade the submodules (i.e., to check out the version that is
-actually requested by the subscriber, run `git submodule update`.
-
-    $ git pull
-    $ git submodule update
-
-### Updating a submodule
-To update a submodule, say gnulib, do as follows:
-
-Get the most recent version of the master branch from git.
-
-    $ cd gnulib
-    $ git fetch
-    $ git checkout -b master --track origin/master
-
-Make sure Bison can live with that version of gnulib.
-
-    $ cd ..
-    $ ./bootstrap
-    $ make distcheck
-
-Register your changes.
-
-    $ git commit ...
-
-For a suggestion of what gnulib commit might be stable enough for a formal
-release, see the ChangeLog in the latest gnulib snapshot at
-https://erislabs.net/ianb/projects/gnulib/.
-
-The Autoconf files we use are currently:
-- m4/m4.m4
-- lib/m4sugar/m4sugar.m4
-- lib/m4sugar/foreach.m4
-
-These files don't change very often in Autoconf, so it should be relatively
-straight-forward to examine the differences in order to decide whether to
-update.
-
-## Troubleshooting
-
-Bison is self-hosted: its parser is generated by Bison.  We don't force
-ourselves to use the previous release of Bison, we use the current git
-master for several reasons:
-- dogfooding: let Bison be its first user
-- monitoring: seeing the diff on the generated parsers with git is very
-  helpful, as it allows to see easily the impact of the changes on a real
-  case parser.
-
-If you are unlucky the generated files, src/parse-gram.[ch], may be older
-than their source, src/parse-gram.y.  And your current version of Bison
-might not be able to grok it.  In that case, first refresh the generated
-files:
-
-    $ touch src/parse-gram.[ch]
-
-Then proceed.
-
-In case you wrecked your current copy of the parser, get back the previous
-version, compile bison, then force it to recreate the files:
-
-    $ git checkout HEAD^ src/parse-gram.[ch]
-    $ make -C _build
-    $ touch src/parse-gram.y
-    $ make -C _build
-
-
-Administrivia
-=============
-
-## If you incorporate a change from somebody on the net:
-First, if it is a large change, you must make sure they have signed the
-appropriate paperwork.  Second, be sure to add their name and email address
-to THANKS.
-
-## If a change fixes a test, mention the test in the commit message.
-
-## Bug reports
-If somebody reports a new bug, mention his name in the commit message and in
-the test case you write.  Put him into THANKS.
-
-The correct response to most actual bugs is to write a new test case which
-demonstrates the bug.  Then fix the bug, re-run the test suite, and check
-everything in.
-
-
-
-Hacking
-=======
-
-## Visible Changes
-Which include serious bug fixes, must be mentioned in NEWS.
-
-## Translations
-Only user visible strings are to be translated: error messages, bits of the
-.output file etc.  This excludes impossible error messages (comparable to
-assert/abort), and all the --trace output which is meant for the maintainers
-only.
-
-## Vocabulary
-- "lookahead", not "look-ahead".
-- "midrule", not "mid-rule".
-- "nonterminal", not "variable" or "non-terminal" or "non terminal".
-  Abbreviated as "nterm".
-- "shift/reduce" and "reduce/reduce", not "shift-reduce" or "shift reduce",
-  etc.
-
-## Syntax Highlighting
-It's quite nice to be in C++ mode when editing lalr1.cc for instance.
-However tools such as Emacs will be fooled by the fact that braces and
-parens do not nest, as in `[[}]]`.  As a consequence you might be misguided
-by its visual pairing to parens.  The m4-mode is safer.  Unfortunately the
-m4-mode is also fooled by `#` which is sees as a comment, stops pairing with
-parens/brackets that are inside...
-
-## Implementation Notes
-There are several places with interesting details about the implementation:
-- [Understanding C parsers generated by GNU
-Bison](https://www.cs.uic.edu/~spopuri/cparser.html) by Satya Kiran Popuri,
-is a wonderful piece of work that explains the implementation of Bison,
-- [src/gram.h](src/gram.h) documents the way the grammar is represented
-- [src/tables.h](src/tables.h) documents the generated tables
-- [data/README.md](data/README.md) contains details about the m4 implementation
-
-## Coding Style
-Do not add horizontal tab characters to any file in Bison's repository
-except where required.  For example, do not use tabs to format C code.
-However, make files, ChangeLog, and some regular expressions require tabs.
-Also, test cases might need to contain tabs to check that Bison properly
-processes tabs in its input.
-
-Prefer `res` as the name of the local variable that will be "return"ed by
-the function.
-
-In writing arithmetic comparisons, use "<" and "<=" rather than ">" and ">="
-<https://public-inbox.org/git/7vfyw7yebj.fsf_-_@assigned-by-dhcp.cox.net/>.
-
-### Bison
-Follow the GNU Coding Standards.
-
-Don't reinvent the wheel: we use gnulib, which features many components.
-Actually, Bison has legacy code that we should replace with gnulib modules
-(e.g., many ad hoc implementations of lists).
-
-#### Includes
-The `#include` directives follow an order:
-- first section for *.c files is `<config.h>`.  Don't include it in header
-  files
-- then, for *.c files, the corresponding *.h file
-- then possibly the `"system.h"` header
-- then the system headers.
-  Consider headers from `lib/` like system headers (i.e., `#include
-  <verify.h>`, not `#include "verify.h"`).
-- then headers from src/ with double quotes (`#include "getargs.h"`).
-
-Keep headers sorted alphabetically in each section.
-
-See also the [Header
-files](https://www.gnu.org/software/gnulib/manual/html_node/Header-files.html)
-and the [Implementation
-files](https://www.gnu.org/software/gnulib/manual/html_node/Implementation-files.html#Implementation-files)
-nodes of the gnulib documentation.
-
-Some source files are in the build tree (e.g., `src/scan-gram.c` made from
-`src/scan-gram.l`).  For them to find the headers from `src/`, we actually
-use `#include "src/getargs.h"` instead of `#include "getargs.h"`---that
-saves us from additional `-I` flags.
-
-### Skeletons
-We try to use the "typical" coding style for each language.
-
-#### CPP
-We indent the CPP directives this way:
-
-```
-#if FOO
-# if BAR
-#  define BAZ
-# endif
-#endif
-```
-
-Don't indent with leading spaces in the skeletons (it's OK in the grammar
-files though, e.g., in `%code {...}` blocks).
-
-On occasions, use `cppi -c` to see where we stand.  We don't aim at full
-correctness: depending `-d`, some bits can be in the *.c file, or the *.h
-file within the double-inclusion cpp-guards.  In that case, favor the case
-of the *.h file, but don't waste time on this.
-
-Don't hesitate to leave a comment on the `#endif` (e.g., `#endif /* FOO
-*/`), especially for long blocks.
-
-There is no consistency on `! defined` vs. `!defined`.  The day gnulib
-decides, we'll follow them.
-
-#### C/C++
-Follow the GNU Coding Standards.
-
-The `glr.c` skeleton was implemented with `camlCase`.  We are migrating it
-to `snake_case`.  Because we are gradually standardizing the code, it is
-currently inconsistent.
-
-Use `YYFOO` and `yyfoo` for entities that are exposed to the user.  They are
-part of our contract with the users wrt backward compatibility.
-
-Use `YY_FOO` and `yy_foo` for private matters.  Users should not use them,
-we are free to change them without fear of backward compatibility issues.
-
-Use `*_t` for types, especially for `yy*_t` in which case we shouldn't worry
-about the C standard introducing such a name.
-
-#### C++
-Follow the [C++ Core
-Guidelines](https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines).
-The [Google ones](https://google.github.io/styleguide/cppguide.html) may be
-interesting too.
-
-Our enumerators, such as the kinds (symbol and token kinds), should be lower
-case, but it was too late to follow that track for token kinds, and symbol
-kind enumerators are made to be consistent with them.
-
-Use `*_type` for type aliases.  Use `foo_get()` and `foo_set(v)` for
-accessors, or simply `foo()` and `foo(v)`.
-
-Use the `yy` prefix for private stuff, but there's no need for it in the
-public API.  The `yy` prefix is already taken care of via the namespace.
-
-#### Java
-We follow the [Java Code
-Conventions](https://www.oracle.com/technetwork/java/codeconventions-150003.pdf)
-and [Google Java Style
-Guide](https://google.github.io/styleguide/javaguide.html).  Unfortunately
-at some point some GNU Coding Style was installed in Java, but it's an
-error.  So we should for instance stop putting spaces in function calls.
-Because we are standardizing the code, it is currently inconsistent.  Treat
-acronyms as words: `YYLacStack`, not `YYLACStack`.
-
-Use a 2-space indentation (Google) rather than 4 (Oracle).
-
-Don't use the `yy` prefix for public members: `getExpectedTokens`, not
-`yyexpectedTokens` or `yygetExpectedTokens`.  Keep the `yy` prefix though
-for private details.
-
-## Commit Messages
-Imitate the style we use.  Use `git log` to get sources of inspiration.
-
-If the changes have a small impact on Bison's generated parser, embed these
-changes in the commit itself.  If the impact is large, first push all the
-changes except those about src/parse-gram.[ch], and then another commit
-named "regen" which is only about them.
-
-## Debugging
-Bison supports tracing of its various steps, via the `--trace` option.
-Since it is not meant for the end user, it is not displayed by `bison
---help`, nor is it documented in the manual.  Instead, run `bison
---trace=help`.
-
-## Documentation
-Use `@option` for options and options with their argument if they have no
-space (e.g., `@option{-Dfoo=bar}`).  However, use `@samp` elsewhere (e.g.,
-`@samp{-I foo}`).
-
-
-Test Suite
-==========
-
-## make check
-Consume without moderation.  It is composed of two kinds of tests: the
-examples, and the main test suite.
-
-### The Examples
-In examples/, there is a number of ready-to-use examples (see
-[examples/README.md](examples/README.md)).  These examples have small test
-suites run by `make check`.  The test results are in local `*.log` files
-(e.g., `$build/examples/c/calc/calc.log`).
-
-To check only the examples, run `make check-examples`.  To check just one
-example,
-
-    make check-examples TESTS='examples/c/bistromathic/bistromathic.test'
-
-### The Main Test Suite
-The main test suite, in tests/, is written on top of GNU Autotest, which is
-part of Autoconf.  Run `info autoconf 'Using Autotest'` to read the
-documentation, not only about how to write tests, but also where are the
-logs, how to read them etc.
-
-The main test suite generates a log for each test (e.g.,
-`$build/tests/testsuite.dir/004/testsuite.log` for test #4), and a main log
-file in `$build/tests/testsuite.log`.  The latter is meant for end users: it
-contains lots of details that should help diagnosing issues, including build
-issues.  The per-test logs are more convenient when working locally.
-
-#### TESTSUITEFLAGS
-To run just the main test suite, run `make check-tests`.
-
-The default is for `make check-tests` to run all tests sequentially.  This
-can be very time consuming when checking repeatedly or on slower setups.
-This can be sped up in two ways.
-
-1. Using -j, in a make-like fashion, for example:
-
-    $ make check-tests TESTSUITEFLAGS='-j8'
-
-When using GNU Make, TESTSUITEFLAGS defaults to the -jN passed to it, so you
-may simply run
-
-    $ make check-tests -j8
-
-2. Running only the tests of a certain category. See
-[tests/README.md](tests/README.md#keywords) for the list of categories.
-
-To get a list of all the tests (and their keywords for -k), run
-
-    $ ./tests/testsuite -l
-
-To run a specific set of tests, use -k (for "keyword"). For example:
-
-    $ make check-tests TESTSUITEFLAGS='-k c++'
-
-Both can be combined.
-
-    $ make check-tests TESTSUITEFLAGS='-j8 -k c++'
-
-To rerun the tests that failed:
-
-    $ make recheck -j5
-
-#### Updating the Expectations
-Sometimes some changes have a large impact on the test suite (e.g., when we
-added the `[-Wother]` part to all the warnings).  Part of the update can be
-done with a crude tool: `build-aux/update-test`.
-
-Once you ran the test suite, and therefore have many `testsuite.log` files,
-run `make update-tests`.  Or, by hand, from the *source* tree:
-
-    $ ./build-aux/update-test $build/tests/testsuite.dir/*/testsuite.log
-
-where `$build` would be your build tree.  This will hopefully update most
-tests.  Re-run the test suite.  It might be interesting to run `update-test`
-again, since some early failures may stop latter tests from being run.  Yet
-at some point, you'll have to fix remaining issues by hand...
-
-
-## Running Java parsers
-Use the `javaexec.sh` script.  For instance to run the parser of test case
-504:
-
-    $ sh ./_build/javaexec.sh -cp ./_build/tests/testsuite.dir/504 Calc
-
-## Using Sanitizers
-Address sanitizer (ASAN) and undefined-behavior sanitizer (UBSAN) are very
-useful.  Here's one way to set them up with GCC 10 on Mac Ports
-
-1. Configure with
-   ```
-   $ ./configure -C --enable-gcc-warnings \
-       CPPFLAGS='-isystem /opt/local/include' \
-       CC='gcc-mp-10 -fsanitize=address -fsanitize=undefined' \
-       CFLAGS='-ggdb' \
-       CXX='g++-mp-10.0 -fsanitize=address -fsanitize=undefined' \
-       CXXFLAGS='-ggdb' \
-       LDFLAGS='-L/opt/local/lib'
-   ```
-
-2. Compile
-
-3. Generate debug symbols:
-
-   ```
-   $ dsymutil src/bison
-   ```
-
-4. Run the tests with leak detection enabled
-   (`ASAN_OPTIONS=detect_leaks=1`).  E.g. for counterexamples:
-   ```
-   $ make check-tests TESTSUITEFLAGS='-j5 -k cex' ASAN_OPTIONS=detect_leaks=1
-   ```
-
-5. You might need a suppression file.  See
-   https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer#suppressions.
-   With G++ on a Mac, you might need a suppression file (say `leak.supp`)
-   that contains:
-
-   ```
-   leak:std::clog
-   ```
-
-   and pass the additional flags
-   `LSAN_OPTIONS=suppressions=$PWD/leak.supp,print_suppressions=0`
-
-6. To run the debugger, you might want something like this:
-   ```
-   $ YYDEBUG=1 \
-     UBSAN_OPTIONS=print_stacktrace=1 \
-     LSAN_OPTIONS=suppressions=$PWD/leak.supp,print_suppressions=0 \
-     ASAN_OPTIONS=detect_leaks=1 \
-     lldb -- ./_build/tests/testsuite.dir/712/glr-regr2a ./_build/tests/testsuite.dir/712/input1.txt
-   ```
-
-   In lldb to set a break on ubsan, try `rbreak ^__ubsan_handle_`.
-
-## make maintainer-check-valgrind
-This target uses valgrind both to check bison, and the generated parsers.
-
-This is not mature on Mac OS X.  First, Valgrind does support the way bison
-calls m4, so Valgrind cannot be used to check bison on Mac OS X.
-
-Second, there are many errors that come from the platform itself, not from
-bison.  build-aux/darwin11.4.0.valgrind addresses some of them.
-
-Third, valgrind issues warnings such as:
-
-    --99312:0:syswrap- WARNING: Ignoring sigreturn( ..., UC_RESET_ALT_STACK );
-
-which cause the test to fail uselessly.  It is hard to ignore these errors
-with a major overhaul of the way instrumentation is performed in the test
-suite.  So currently, do not try to run valgrind on Mac OS X.
-
-## Release checks
-Try to run the test suite with more severe conditions before a
-release:
-
-- Configure the package with --enable-gcc-warnings, so that one checks that
-  1. Bison compiles cleanly, 2. the parsers it produces compile cleanly too.
-
-- Maybe build with -DGNULIB_POSIXCHECK, which suggests gnulib modules that
-  can fix portability issues.  See if you really want to pay attention to
-  its warnings; there's no need to obey blindly to it
-  (<https://lists.gnu.org/r/bison-patches/2012-05/msg00057.html>).
-
-- Check with `make syntax-check` if there are issues diagnosed by gnulib.
-
-- run `make maintainer-check` which:
-  - runs `valgrind -q bison` to run Bison under Valgrind.
-  - runs the parsers under Valgrind.
-  - runs the test suite with G++ as C compiler...
-
-- run `make maintainer-check-push`, which runs `make maintainer-check` while
-  activating the push implementation and its pull interface wrappers in many
-  test cases that were originally written to exercise only the pull
-  implementation.  This makes certain the push implementation can perform
-  every task the pull implementation can.
-
-- run `make maintainer-check-xml`, which runs `make maintainer-check` while
-  checking Bison's XML automaton report for every working grammar passed to
-  Bison in the test suite.  The check just diffs the output of Bison's
-  included XSLT style sheets with the output of --report=all and --graph.
-
-- running `make maintainer-check-release` takes care of running
-  maintainer-check, maintainer-check-push and maintainer-check-xml.
-
-- Change tests/atlocal/CFLAGS to add your preferred options.
-
-- Test with a very recent version of GCC for both C and C++.  Testing with
-  older versions that are still in use is nice too.
-
-## gnulib
-To run tests on gnulib components (e.g., on bitset):
-
-    cd gnulib
-    ./gnulib-tool --test bitset-tests
-
-possibly within a specified environment:
-
-    CC='gcc-mp-8 -fsanitize=undefined' ./gnulib-tool --test bitset-tests
-
-To be able to run the tests several times, and to use symlinks instead of
-copies so that one can update the origin gnulib directory and immediately
-re-run the tests, run:
-
-    ./gnulib-tool --symlink --create-test --dir=/tmp/gnutest bitset-tests
-    cd /tmp/gnutest
-    ./configure -C CC='gcc-mp-8 -fsanitize=undefined' CFLAGS='-ggdb'
-    make check
-
-
-## Docker
-
-Running old compilers is not very easy.  Docker can be used for some of
-them.  Have a look at .travis.yml for setups.  Move the tarball in `/tmp`
-and run, for instance:
-
-```
-docker run -v /tmp:/tmp -it ubuntu:xenial
-```
-
-This way, the host and guest machines share `/tmp`.
-
-### GCC 4.6
-On Ubuntu Xenial.
-
-```
-apt-get update
-apt-get install software-properties-common
-apt-add-repository -y "ppa:ubuntu-toolchain-r/test"
-apt-get update
-apt-get install -y gcc-4.6 g++-4.6 m4 make
-```
-
-## Stow
-
-If you want to install several versions of Bison using GNU Stow, do
-something like this:
-
-```
-for v in 3.7 3.7.1
-do
-  cd /tmp
-  wget https://ftp.gnu.org/gnu/bison/bison-$v.tar.xz
-  tar xf bison-$v.tar.xz
-  cd bison-$v
-  ./configure --prefix /usr/local/stow/bison-$v
-  make -j4
-  sudo make install
-done
-```
-
-Release Procedure
-=================
-
-See the [README-release file](README-release), created when the package is
-bootstrapped.
-
-<!--
-
-Copyright (C) 2002-2005, 2007-2015, 2018-2022, 2025-2026 Free Software
-Foundation, Inc.
-
-This file is part of GNU Bison.
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-Local Variables:
-mode: markdown
-fill-column: 76
-ispell-dictionary: "american"
-End:
-
-LocalWords:  Automake Autoconf Gettext Gzip Rsync Valgrind gnulib submodules
-LocalWords:  submodule init cd distcheck ChangeLog valgrind sigreturn sudo
-LocalWords:  UC gcc DGNULIB POSIXCHECK xml XSLT glr lalr README po runtime rc
-LocalWords:  gnupload gnupg gpg keyserver BDF ncftp filename clearsign cvs dir
-LocalWords:  symlinks vti html lt POSIX Cc'ed Graphviz Texinfo autoconf jN
-LocalWords:  automake autopoint graphviz texinfo PROG Wother parsers YYFOO
-LocalWords:  TESTSUITEFLAGS deprec struct gnulib's getopt config ggdb yyfoo
-LocalWords:  bitset fsanitize symlink CFLAGS MERCHANTABILITY ispell wrt YY
-LocalWords:  american Administrivia camlCase yy accessors namespace src hoc
-LocalWords:  getExpectedTokens yyexpectedTokens yygetExpectedTokens parens
-LocalWords:  regen dogfooding Autotest testsuite getargs CPP BAZ endif cppi
-LocalWords:  cpp javaexec cp Calc ASAN UBSAN CPPFLAGS isystem CXX cex Gperf
-LocalWords:  CXXFLAGS LDFLAGS dsymutil gperf
-
--->

README.md

@@ -1 +0,0 @@
-README

REFERENCES

@@ -0,0 +1,33 @@
+From phr Tue Jul  8 10:36:19 1986
+Date: Tue, 8 Jul 86 00:52:24 EDT
+From: phr (Paul Rubin)
+To: riferguson%[email protected], tower
+Subject: Re:  Bison documentation?
+
+The main difference between Bison and Yacc that I know of is that
+Bison supports the @N construction, which gives you access to
+the starting and ending line number and character number associated
+with any of the symbols in the current rule.
+
+Also, Bison supports the command `%expect N' which says not to mention
+the conflicts if there are N shift/reduce conflicts and no reduce/reduce
+conflicts.
+
+The differences in the algorithms stem mainly from the horrible
+kludges that Johnson had to perpetrate to make Yacc fit in a PDP-11.
+
+Also, Bison uses a faster but less space-efficient encoding for the
+parse tables (see Corbett's PhD thesis from Berkeley, "Static
+Semantics in Compiler Error Recovery", June 1985, Report No. UCB/CSD
+85/251), and more modern technique for generating the lookahead sets.
+(See Frank DeRemer and Thomas Pennello, "Efficient Computation of
+LALR(1) Look-Ahead Sets", ACM Transactions on Programming Languages
+and Systems (TOPLAS) 4, 4 (October 1982), 615-649.  Their
+technique is the standard one now.)
+
+	paul rubin
+	free software foundation
+
+
+[DeRemer-Pennello reference corrected by Paul Eggert <[email protected]>,
+ 2004-06-21.]

THANKS

@@ -1,262 +1,112 @@
 Bison was originally written by Robert Corbett.  It would not be what
 it is today without the invaluable help of these people:
 
-Aaro Koskinen             [email protected]
-Аскар Сафин               [email protected]
-Adam Sampson              [email protected]
-Adrian Vogelsgesang       [email protected]
-Ahcheong Lee              [email protected]
 Airy Andre                [email protected]
-Akim Demaille             akim@gnu.org
+Akim Demaille             akim@freefriends.org
 Albert Chin-A-Young       [email protected]
 Alexander Belopolsky      [email protected]
-Alexandre Duret-Lutz      adl@lrde.epita.fr
-Andre da Costa Barros     [email protected]
-Andreas Damm              [email protected]
+Alexandre Duret-Lutz      adl@src.lip6.fr
 Andreas Schwab            [email protected]
-Andrei Malashkin          [email protected]
 Andrew Suffield           [email protected]
-Angelo Borsotti           [email protected]
 Anthony Heading           [email protected]
-Antonio Silva Correia     [email protected]
 Arnold Robbins            [email protected]
 Art Haas                  [email protected]
-Arthur Schwarz            [email protected]
-Askar Safin               [email protected]
-Balázs Scheidler          [email protected]
 Baron Schwartz            [email protected]
-Ben Pfaff                 [email protected]
 Benoit Perrot             [email protected]
-Bernd Edlinger            [email protected]
-Bernd Kiefer              [email protected]
 Bert Deknuydt             [email protected]
 Bill Allombert            [email protected]
 Bob Rossi                 [email protected]
 Brandon Lucia             [email protected]
-Brooks Moses              [email protected]
 Bruce Lilly               [email protected]
-Bruno Belanyi             [email protected]
 Bruno Haible              [email protected]
 Charles-Henri de Boysson  [email protected]
 Christian Burger          [email protected]
-Clément Démoulins         [email protected]
-Colin Daley               [email protected]
 Cris Bailiff              [email protected]
 Cris van Pelt             [email protected]
 Csaba Raduly              [email protected]
-Dagobert Michelsen        [email protected]
-Daniel Frużyński          [email protected]
-Daniel Galloway           [email protected]
 Daniel Hagerty            [email protected]
-Daniela Becker            [email protected]
-David Barto               [email protected]
 David J. MacKenzie        [email protected]
-David Kastrup             [email protected]
-David Michael             [email protected]
-Dengke Du                 [email protected]
-Denis Excoffier           [email protected]
-Dennis Clarke             [email protected]
-Derek Clegg               [email protected]
 Derek M. Jones            [email protected]
 Di-an Jan                 [email protected]
 Dick Streefland           [email protected]
 Didier Godefroy           [email protected]
-Don Macpherson            [email protected]
-Dwight Guth               [email protected]
-Efi Fogel                 [email protected]
 Enrico Scholz             [email protected]
 Eric Blake                [email protected]
-Eric S. Raymond           [email protected]
-Étienne Renault           [email protected]
-Evan Lavelle              [email protected]
-Evan Nemerson             [email protected]
 Evgeny Stambulchik        [email protected]
 Fabrice Bauzac            [email protected]
-Ferdinand Thiessen        [email protected]
 Florian Krohm             [email protected]
 Frank Heckenbach          [email protected]
 Frans Englich             [email protected]
-Gabriel Rassoul           [email protected]
-Gary L Peskin             [email protected]
-Gavin Smith               [email protected]
 Georg Sauthoff            [email protected]
-George Neuner             [email protected]
-Gilles Espinasse          [email protected]
-Giorgos Pap               [email protected]
 Goran Uddeborg            [email protected]
 Guido Trentalancia        [email protected]
 H. Merijn Brand           [email protected]
-Hans Åberg                haberg[email protected]
-Horst Von Brand           [email protected]
-Jacob L. Mandelson        [email protected]
+Hans Aberg                haberg@matematik.su.se
 Jan Nieuwenhuizen         [email protected]
-Jannick                   [email protected]
-Jeff Hammond              [email protected]
-Jerry Quinn               [email protected]
 Jesse Thilo               [email protected]
 Jim Kent                  [email protected]
 Jim Meyering              [email protected]
-Joel E. Denny             joeldenny@joeldenny.org
-Johan van Selst           [email protected]
-John Horigan              [email protected]
-Jonathan Fabrizio         [email protected]
+Joel E. Denny             jdenny@ces.clemson.edu
 Jonathan Nieder           [email protected]
-Josh Soref                [email protected]
 Juan Manuel Guerrero      [email protected]
-Karl Berry                [email protected]
 Kees Zeelenberg           [email protected]
 Keith Browne              [email protected]
-Ken Moffat                [email protected]
-Kiyoshi Kanazawa          [email protected]
-Lars Maier                [email protected]
-Lars Wendler              [email protected]
-László Várady             [email protected]
 Laurent Mascherpa         [email protected]
-Lie Yan                   [email protected]
-Maarten De Braekeleer     [email protected]
 Magnus Fromreide          [email protected]
 Marc Autret               [email protected]
-Marc Mendiola             [email protected]
-Marc Schönefeld           [email protected]
-Mark Boyall               [email protected]
-Marko Mäkelä              [email protected]
-Martin Blais              [email protected]
 Martin Jacobs             [email protected]
 Martin Mokrejs            [email protected]
 Martin Nylin              [email protected]
 Matt Kraai                [email protected]
 Matt Rosing               [email protected]
-Maxim Prohorenko          [email protected]
-Michael Catanzaro         [email protected]
-Michael Felt              [email protected]
 Michael Hayes             [email protected]
 Michael Raskin            [email protected]
-Michał Majchrowicz        [email protected]
-Michel d'Hooge            [email protected]
-Michiel De Wilde          [email protected]
 Mickael Labau             [email protected]
 Mike Castle               [email protected]
-Mike Frysinger            [email protected]
-Mike Sullivan             [email protected]
-Nate Guerin               [email protected]
 Neil Booth                [email protected]
 Nelson H. F. Beebe        [email protected]
-neok m4700                [email protected]
-Nick Bowler               [email protected]
-Nicolas Bedon             [email protected]
 Nicolas Burrus            [email protected]
 Nicolas Tisserand         [email protected]
-Nikita Popov              [email protected]
-Nikki Valen               [email protected]
 Noah Friedman             [email protected]
 Odd Arild Olsen           [email protected]
 Oleg Smolsky              [email protected]
-Oleksii Taran             [email protected]
-Oliver Mangold            [email protected]
 Paolo Bonzini             [email protected]
-Paolo Simone Gasparello   [email protected]
 Pascal Bart               [email protected]
-Patrice Dumas             [email protected]
 Paul Eggert               [email protected]
 Paul Hilfinger            [email protected]
 Per Allansson             [email protected]
-Peter Eisentraut          [email protected]
 Peter Fales               [email protected]
 Peter Hamorsky            [email protected]
-Peter Simons              [email protected]
-Petr Machata              [email protected]
-Pho                       [email protected]
 Piotr Gackiewicz          [email protected]
-Piotr Marcińczyk          [email protected]
-Pramod Kumbhar            [email protected]
-Quentin Hocquet           [email protected]
 Quoc Peyrot               [email protected]
 R Blake                   [email protected]
 Raja R Harinath           [email protected]
 Ralf Wildenhues           [email protected]
-Rich Wilson               [email protected]
 Richard Stallman          [email protected]
-Rici Lake                 [email protected]
-Rob Conde                 [email protected]
-Rob Vermaas               [email protected]
 Robert Anisko             [email protected]
-Robert Yang               [email protected]
-Roland Levillain          [email protected]
-Ryan                      [email protected]
 Satya Kiran Popuri        [email protected]
 Sebastian Setzer          [email protected]
 Sebastien Fricker         [email protected]
-Sébastien Villemot        [email protected]
 Sergei Steshenko          [email protected]
 Shura                     [email protected]
-Simon Sobisch             [email protected]
-Stefano Lattarini         [email protected]
-Stephen Cameron           [email protected]
 Steve Murphy              [email protected]
-Suhwan Song               [email protected]
-Sum Wu                    [email protected]
-Théophile Ranquet         [email protected]
-Thiru Ramakrishnan        [email protected]
-Thomas Jahns              [email protected]
-Thomas Petazzoni          [email protected]
+Summum Bonum              [email protected]
 Tim Josling               [email protected]
-Tim Landscheidt           [email protected]
 Tim Van Holder            [email protected]
-Tobias Frost              [email protected]
-Todd Freed                [email protected]
-Tom Kramer                [email protected]
 Tom Lane                  [email protected]
 Tom Tromey                [email protected]
-Tomasz Kłoczko            [email protected]
 Tommy Nordgren            [email protected]
 Troy A. Johnson           [email protected]
-Tys Lefering              [email protected]
-Uxio Prego                [email protected]
-Valentin Tolmer           [email protected]
-wcventure                 [email protected]
-Victor Khomenko           [email protected]
-Victor Zverovich          [email protected]
+Tys Lefering              [email protected]
 Vin Shelton               [email protected]
-W.C.A. Wijngaards         [email protected]
 Wayne Green               [email protected]
-Wei Song                  [email protected]
-Wojciech Polak            [email protected]
-Wolfgang S. Kechel        [email protected]
-Wolfgang Thaller          [email protected]
 Wolfram Wagner            [email protected]
 Wwp                       [email protected]
-xolodho                   [email protected]
-Yuichiro Kaneko           [email protected]
-Yuriy Solodkyy            [email protected]
 Zack Weinberg             [email protected]
-江 祖铭                    [email protected]
-長田偉伸                   [email protected]
-马俊                       [email protected]
 
 Many people are not named here because we lost track of them.  We
 thank them!  Please, help us keeping this list up to date.
 
 Local Variables:
 mode: text
-coding: utf-8
 End:
-
------
-
-Copyright (C) 2000-2015, 2018-2022, 2025-2026 Free Software Foundation,
-Inc.
-
-This file is part of Bison, the GNU Parser Generator.
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <https://www.gnu.org/licenses/>.

TODO

@@ -1,590 +1,90 @@
-* Soon
-** yyerror_range in GLR
-It seems useless that it is based on glr_stack_item, it should be doable
-with location only.
+-*- outline -*-
 
-** scan-code
-The default case is scanning char-per-char.
+* Header guards
 
-    /* By default, grow the string obstack with the input.  */
-    .|\n        STRING_GROW ();
+From Franc,ois: should we keep the directory part in the CPP guard?
 
-make it more eager?
 
-** Missing tests
-commit 2c294c132528ede23d8ae4959783a67e9ff05ac5
-Author: Vincent Imbimbo <[email protected]>
-Date:   Sat Jan 23 13:25:18 2021 -0500
+* Yacc.c: CPP Macros
 
-    cex: fix state-item pruning
+Do some people use YYPURE, YYLSP_NEEDED like we do in the test suite?
+They should not: it is not documented.  But if they need to, let's
+find something clean (not like YYLSP_NEEDED...).
 
-See https://lists.gnu.org/r/bug-bison/2021-01/msg00002.html
 
-** pos_set_set
-The current approach is correct, but with poor performances.  Bitsets need
-to support 'assign' and 'shift'.  And instead of extending POS_SET just for
-the out-of-range new values, we need something like doubling the size.
+* Installation
 
-** glr
-There is no test with "Parse on stack %ld rejected by rule %d" in it.
+* Documentation
+Before releasing, make sure the documentation ("Understanding your
+parser") refers to the current `output' format.
 
-** yyrline etc.
-Clarify that rule numbers in the skeletons are 1-based.
+* lalr1.cc
+** vector
+Move to using vector, drop stack.hh.
 
-** Macros in C++
-There are many macros that should obey api.prefix: YY_CPLUSPLUS, YY_MOVE,
-etc.
-
-** yyerrok in Java
-And add tests in calc.at, to prepare work for D.
-
-** YYERROR and yynerrs
-We are missing some cases.  Write a test case, and check all the skeletons.
-
-** Cex
-*** Improve gnulib
-Don't do this (counterexample.c):
-
-// This is the fastest way to get the tail node from the gl_list API.
-gl_list_node_t
-list_get_end (gl_list_t list)
-{
-  gl_list_node_t sentinel = gl_list_add_last (list, NULL);
-  gl_list_node_t res = gl_list_previous_node (list, sentinel);
-  gl_list_remove_node (list, sentinel);
-  return res;
-}
-
-*** Ambiguous rewriting
-If the user is stupid enough to have equal rules, then the derivations are
-harder to read:
-
-    Reduce/reduce conflict on tokens $end, "+", "⊕":
-        2 exp: exp "+" exp .
-        3 exp: exp "+" exp .
-      Example                  exp "+" exp •
-      First derivation         exp ::=[ exp "+" exp • ]
-      Example                  exp "+" exp •
-      Second derivation        exp ::=[ exp "+" exp • ]
-
-Do we care about this?  In color, we use twice the same color here, but we
-could try to use the same color for the same rule.
-
-*** XML reports
-Show the counterexamples.  This is going to be really hard and/or painful.
-Unless we play it dumb (little structure).
-
-** Bistromathic
-- How about not evaluating incomplete lines when the text is not finished
-  (as shells do).
-
-** Questions
-*** Java
-- Should i18n be part of the Lexer?  Currently it's a static method of
-  Lexer.
-
-- is there a migration path that would allow to use TokenKinds in
-  yylex?
-
-- define the tokens as an enum too.
-
-- promote YYEOF rather than EOF.
-
-** YYerror
-https://git.savannah.gnu.org/gitweb/?p=gettext.git;a=blob;f=gettext-runtime/intl/plural.y;h=a712255af4f2f739c93336d4ff6556d932a426a5;hb=HEAD
-
-should be updated to not use YYERRCODE.  Returning an undef token is good
-enough.
-
-** Java
-*** calc.at
-Stop hard-coding "Calc".  Adjust local.at (look for FIXME).
-
-** doc
-I feel it's ugly to use the GNU style to declare functions in the doc.  It
-generates tons of white space in the page, and may contribute to bad page
-breaks.
-
-** consistency
-token vs terminal.
-
-** api.token.raw
-The YYUNDEFTOK could be assigned a semantic value so that yyerror could be
-used to report invalid lexemes.
-
-** push parsers
-Consider deprecating impure push parsers.  They add a lot of complexity, for
-a bad feature.  On the other hand, that would make it much harder to sit
-push parsers on top of pull parser.  Which is currently not relevant, since
-push parsers are measurably slower.
-
-** %define parse.error formatted
-How about pushing Bistromathic's yyreport_syntax_error as another standard
-way to generate the error message, and leave to the user the task of
-providing the message formats?  Currently in bistro, it reads:
-
-    const char *
-    error_format_string (int argc)
-    {
-      switch (argc)
-        {
-        default: /* Avoid compiler warnings. */
-        case 0: return _("%@: syntax error");
-        case 1: return _("%@: syntax error: unexpected %u");
-          // TRANSLATORS: '%@' is a location in a file, '%u' is an
-          // "unexpected token", and '%0e', '%1e'... are expected tokens
-          // at this point.
-          //
-          // For instance on the expression "1 + * 2", you'd get
-          //
-          // 1.5: syntax error: expected - or ( or number or function or variable before *
-        case 2: return _("%@: syntax error: expected %0e before %u");
-        case 3: return _("%@: syntax error: expected %0e or %1e before %u");
-        case 4: return _("%@: syntax error: expected %0e or %1e or %2e before %u");
-        case 5: return _("%@: syntax error: expected %0e or %1e or %2e or %3e before %u");
-        case 6: return _("%@: syntax error: expected %0e or %1e or %2e or %3e or %4e before %u");
-        case 7: return _("%@: syntax error: expected %0e or %1e or %2e or %3e or %4e or %5e before %u");
-        case 8: return _("%@: syntax error: expected %0e or %1e or %2e or %3e or %4e or %5e or %6e before %u");
-        }
-    }
-
-The message would have to be generated in a string, and pushed to yyerror.
-Which will be a pain in the neck in yacc.c.
-
-If we want to do that, we should think very carefully about the syntax of
-the format string.
-
-** yyclearin does not invoke the lookahead token's %destructor
-https://lists.gnu.org/r/bug-bison/2018-02/msg00000.html
-Rici:
-
-> Modifying yyclearin so that it calls yydestruct seems like the simplest
-> solution to this issue, but it is conceivable that such a change would
-> break programs which already perform some kind of workaround in order to
-> destruct the lookahead symbol. So it might be necessary to use some kind of
-> compatibility %define, or to create a new replacement macro with a
-> different name such as yydiscardin.
->
-> At a minimum, the fact that yyclearin does not invoke the %destructor
-> should be highlighted in the documentation, since it is not at all obvious.
-
-** Issues in i18n
-
-Les catégories d'avertissements incluent :
-  conflicts-sr      conflits S/R (activé par défaut)
-  conflicts-rr      conflits R/R (activé par défaut)
-  dangling-alias    l'alias chaîne n'est pas attaché à un symbole
-  deprecated        construction obsolète
-  empty-rule        règle vide sans %empty
-  midrule-values    valeurs de règle intermédiaire non définies ou inutilisées
-  precedence        priorité et associativité inutiles
-  yacc              incompatibilités avec POSIX Yacc
-  other             tous les autres avertissements (activé par défaut)
-  all               tous les avertissements sauf « dangling-alias » et « yacc »
-  no-CATEGORY       désactiver les avertissements dans CATEGORIE
-  none              désactiver tous les avertissements
-  error[=CATEGORY]  traiter les avertissements comme des erreurs
-
-Line -1 and -3 should mention CATEGORIE, not CATEGORY.
-
-* Bison 3.9
-** Rewrite glr.cc (currently glr2.cc)
-*** custom error messages
-
-*** Remove jumps
-We can probably replace setjmp/longjmp with exceptions.  That would help
-tremendously other languages such as D and Java that probably have no
-similar feature.  If we remove jumps, we probably no longer need _Noreturn,
-so simplify `b4_attribute_define([noreturn])` into `b4_attribute_define`.
-
-After discussing with Valentin, it was decided that it's better to stay with
-jumps, since in some places exceptions are ruled out from C++.
-
-*** Coding style
-Move to our coding conventions.  In particular names such as yy_glr_stack,
-not yyGLRStack.
-
-*** yydebug
-It should be a member of the parser object, see lalr1.cc.  Let the parser
-object decide what the debug stream is, rather than open coding std::cerr.
-
-*** Avoid pointers
-There are many places where pointers should be replaced with references.
-Some occurrences were fixed, but now some have improper names:
-
--yygetToken (int *yycharp, ]b4_namespace_ref[::]b4_parser_class[& yyparser][]b4_pure_if([, glr_stack* yystackp])[]b4_user_formals[)
-+yygetToken (int& yycharp, ]b4_namespace_ref[::]b4_parser_class[& yyparser][]b4_pure_if([, glr_stack* yystackp])[]b4_user_formals[)
-
-yycharp is no longer a Pointer.  And yystackp should probably also be a reference.
-
-*** parse.assert
-Currently all the assertions are enabled.  Once we are confident in glr2.cc,
-let parse.assert use the same approach as in lalr1.cc.
-
-*** debug_stream
-Stop using std::cerr everywhere.
-
-*** glr.c
-When glr2.cc fully replaces glr.cc, get rid of the glr.cc scaffolding in
-glr.c.
-
-* Chains
-** Unit rules / Injection rules (Akim Demaille)
-Maybe we could expand unit rules (or "injections", see
-https://homepages.cwi.nl/~daybuild/daily-books/syntax/2-sdf/sdf.html), i.e.,
-transform
-
-        exp: arith | bool;
-        arith: exp '+' exp;
-        bool: exp '&' exp;
-
-into
-
-        exp: exp '+' exp | exp '&' exp;
-
-when there are no actions.  This can significantly speed up some grammars.
-I can't find the papers.  In particular the book 'LR parsing: Theory and
-Practice' is impossible to find, but according to 'Parsing Techniques: a
-Practical Guide', it includes information about this issue.  Does anybody
-have it?
-
-** clean up (Akim Demaille)
-Do not work on these items now, as I (Akim) have branches with a lot of
-changes in this area (hitting several files), and no desire to have to fix
-conflicts.  Addressing these items will happen after my branches have been
-merged.
-
-*** lalr.c
-Introduce a goto struct, and use it in place of from_state/to_state.
-Rename states1 as path, length as pathlen.
-Introduce inline functions for things such as nullable[*rp - ntokens]
-where we need to map from symbol number to nterm number.
-
-There are probably a significant part of the relations management that
-should be migrated on top of a bitsetv.
-
-*** closure
-It should probably take a "state*" instead of two arguments.
-
-*** traces
-The "automaton" and "set" categories are not so useful.  We should probably
-introduce lr(0) and lalr, just the way we have ielr categories.  The
-"closure" function is too verbose, it should probably have its own category.
-
-"set" can still be used for summarizing the important sets.  That would make
-tests easy to maintain.
-
-*** complain.*
-Rename these guys as "diagnostics.*" (or "diagnose.*"), since that's the
-name they have in GCC, clang, etc.  Likewise for the complain_* series of
-functions.
-
-*** ritem
-states/nstates, rules/nrules, ..., ritem/nritems
-Fix the latter.
-
-*** m4: slot, type, type_tag
-The meaning of type_tag varies depending on api.value.type.  We should avoid
-that and using clear definitions with stable semantics.
-
-* D programming language
-There's a number of features that are missing, here sorted in _suggested_
-order of implementation.
-
-When copying code from other skeletons, keep the comments exactly as they
-are.  Keep the same variable names.  If you change the wording in one place,
-do it in the others too.  In other words: make sure to keep the
-maintenance *simple* by avoiding any gratuitous difference.
-
-** CI
-Check when gdc and ldc.
-
-** GLR Parser
-This is very ambitious.  That's the final boss.  There are currently no
-"clean" implementation to get inspiration from.
-
-glr.c is very clean but:
-- is low-level C
-- is a different skeleton from yacc.c
-
-glr.cc is (currently) an ugly hack: a C++ shell around glr.c.  Valentin
-Tolmer is currently rewriting glr.cc to be clean C++, but he is not
-finished.  There will be a lot a common code between lalr1.cc and glr.cc, so
-eventually I would like them to be fused into a single skeleton, supporting
-both deterministic and generalized parsing.
-
-It would be great for D to also support this.
-
-The basic ideas of GLR are explained here:
-
-https://www.codeproject.com/Articles/5259825/GLR-Parsing-in-Csharp-How-to-Use-The-Most-Powerful
-
-* Better error messages
-The users are not provided with enough tools to forge their error messages.
-See for instance "Is there an option to change the message produced by
-YYERROR_VERBOSE?" by Simon Sobisch, on bison-help.
-
-See also
-https://www.cs.tufts.edu/~nr/cs257/archive/clinton-jefferey/lr-error-messages.pdf
-https://research.swtch.com/yyerror
-http://gallium.inria.fr/~fpottier/publis/fpottier-reachability-cc2016.pdf
-
-* Modernization
-Fix data/skeletons/yacc.c so that it defines YYPTRDIFF_T properly for modern
-and older C++ compilers.  Currently the code defaults to defining it to
-'long' for non-GCC compilers, but it should use the proper C++ magic to
-define it to the same type as the C ptrdiff_t type.
-
-* Completion
-Several features are not available in all the back-ends.
-
-- push parsers: glr.c, glr.cc, lalr1.cc (not very difficult)
-- token constructors: Java, C, D (a bit difficult)
-- glr: D, Java (super difficult)
-
-* Bugs
-** Autotest has quotation issues
-tests/input.at:1730:AT_SETUP([%define errors])
-
-->
-
-$ ./tests/testsuite -l | grep errors | sed q
-  38: input.at:1730      errors
-
-* Short term
-** Better design for diagnostics
-The current implementation of diagnostics is ad hoc, it grew organically.
-It works as a series of calls to several functions, with dependency of the
-latter calls on the former.  For instance:
-
-      complain (&sym->location,
-                sym->content->status == needed ? complaint : Wother,
-                _("symbol %s is used, but is not defined as a token"
-                  " and has no rules; did you mean %s?"),
-                quote_n (0, sym->tag),
-                quote_n (1, best->tag));
-      if (feature_flag & feature_caret)
-        location_caret_suggestion (sym->location, best->tag, stderr);
-
-We should rewrite this in a more FP way:
-
-1. build a rich structure that denotes the (complete) diagnostic.
-   "Complete" in the sense that it also contains the suggestions, the list
-   of possible matches, etc.
-
-2. send this to the pretty-printing routine.  The diagnostic structure
-   should be sufficient so that we can generate all the 'format' of
-   diagnostics, including the fixits.
-
-If properly done, this diagnostic module can be detached from Bison and be
-put in gnulib.  It could be used, for instance, for errors caught by
-xgettext.
-
-There's certainly already something alike in GCC.  At least that's the
-impression I get from reading the "-fdiagnostics-format=FORMAT" part of this
-page:
-
-https://gcc.gnu.org/onlinedocs/gcc/Diagnostic-Message-Formatting-Options.html
-
-** Graphviz display code thoughts
-The code for the --graph option is over two files: print_graph, and
-graphviz. This is because Bison used to also produce VCG graphs, but since
-this is no longer true, maybe we could consider these files for fusion.
-
-An other consideration worth noting is that print_graph.c (correct me if I
-am wrong) should contain generic functions, whereas graphviz.c and other
-potential files should contain just the specific code for that output
-format. It will probably prove difficult to tell if the implementation is
-actually generic whilst only having support for a single format, but it
-would be nice to keep stuff a bit tidier: right now, the construction of the
-bitset used to show reductions is in the graphviz-specific code, and on the
-opposite side we have some use of \l, which is graphviz-specific, in what
-should be generic code.
-
-Little effort seems to have been given to factoring these files and their
-print{,-xml} counterpart. We would very much like to re-use the pretty format
-of states from .output for the graphs, etc.
-
-Since graphviz dies on medium-to-big grammars, maybe consider an other tool?
-
-** push-parser
-Check it too when checking the different kinds of parsers.  And be
-sure to check that the initial-action is performed once per parsing.
-
-** m4 names
-b4_shared_declarations is no longer what it is.  Make it
-b4_parser_declaration for instance.
-
-** yychar in lalr1.cc
-There is a large difference bw maint and master on the handling of
-yychar (which was removed in lalr1.cc).  See what needs to be
-back-ported.
-
-
-    /* User semantic actions sometimes alter yychar, and that requires
-       that yytoken be updated with the new translation.  We take the
-       approach of translating immediately before every use of yytoken.
-       One alternative is translating here after every semantic action,
-       but that translation would be missed if the semantic action
-       invokes YYABORT, YYACCEPT, or YYERROR immediately after altering
-       yychar.  In the case of YYABORT or YYACCEPT, an incorrect
-       destructor might then be invoked immediately.  In the case of
-       YYERROR, subsequent parser actions might lead to an incorrect
-       destructor call or verbose syntax error message before the
-       lookahead is translated.  */
-
-    /* Make sure we have latest lookahead translation.  See comments at
-       user semantic actions for why this is necessary.  */
-    yytoken = yytranslate_ (yychar);
-
-
-** Get rid of fake #lines [Bison: ...]
-Possibly as simple as checking whether the column number is nonnegative.
-
-I have seen messages like the following from GCC.
-
-<built-in>:0: fatal error: opening dependency file .deps/libltdl/argz.Tpo: No such file or directory
-
-
-** Discuss about %printer/%destroy in the case of C++.
-It would be very nice to provide the symbol classes with an operator<<
-and a destructor.  Unfortunately the syntax we have chosen for
-%destroy and %printer make them hard to reuse.  For instance, the user
-is invited to write something like
-
-   %printer { debug_stream() << $$; } <my_type>;
-
-which is hard to reuse elsewhere since it wants to use
-"debug_stream()" to find the stream to use.  The same applies to
-%destroy: we told the user she could use the members of the Parser
-class in the printers/destructors, which is not good for an operator<<
-since it is no longer bound to a particular parser, it's just a
-(standalone symbol).
-
-* Various
-** Rewrite glr.cc in C++ (Valentin Tolmer)
-As a matter of fact, it would be very interesting to see how much we can
-share between lalr1.cc and glr.cc.  Most of the skeletons should be common.
-It would be a very nice source of inspiration for the other languages.
-
-Valentin Tolmer is working on this.
-
-* From lalr1.cc to yacc.c
-** Single stack
-Merging the three stacks in lalr1.cc simplified the code, prompted for
-other improvements and also made it faster (probably because memory
-management is performed once instead of three times).  I suggest that
-we do the same in yacc.c.
-
-(Some time later): it's also very nice to have three stacks: it's more dense
-as we don't lose bits to padding.  For instance the typical stack for states
-will use 8 bits, while it is likely to consume 32 bits in a struct.
-
-We need trustworthy benchmarks for Bison, for all our backends.  Akim has a
-few things scattered around; we need to put them in the repo, and make them
-more useful.
+** I18n
+Catch up with yacc.c.
 
 * Report
 
-** Figures
-Some statistics about the grammar and the parser would be useful,
-especially when asking the user to send some information about the
-grammars she is working on.  We should probably also include some
-information about the variables (I'm not sure for instance we even
-specify what LR variant was used).
-
-** GLR
+**  GLR
 How would Paul like to display the conflicted actions?  In particular,
 what when two reductions are possible on a given lookahead token, but one is
 part of $default.  Should we make the two reductions explicit, or just
 keep $default?  See the following point.
 
 ** Disabled Reductions
-See 'tests/conflicts.at (Defaulted Conflicted Reduction)', and decide
+See `tests/conflicts.at (Defaulted Conflicted Reduction)', and decide
 what we want to do.
 
 ** Documentation
 Extend with error productions.  The hard part will probably be finding
 the right rule so that a single state does not exhibit too many yet
-undocumented ''features''.  Maybe an empty action ought to be
+undocumented ``features''.  Maybe an empty action ought to be
 presented too.  Shall we try to make a single grammar with all these
 features, or should we have several very small grammars?
 
+** --report=conflict-path
+Provide better assistance for understanding the conflicts by providing
+a sample text exhibiting the (LALR) ambiguity.  See the paper from
+DeRemer and Penello: they already provide the algorithm.
+
+** Statically check for potential ambiguities in GLR grammars.  See
+<http://www.i3s.unice.fr/~schmitz/papers.html#expamb> for an approach.
+
+
 * Extensions
-** More languages?
-Well, only if there is really some demand for it.
 
-*** PHP
-https://github.com/scfc/bison-php/blob/master/data/lalr1.php
+** Labeling the symbols
+Have a look at the Lemon parser generator: instead of $1, $2 etc. they
+can name the values.  This is much more pleasant.  For instance:
 
-*** Python
-https://lists.gnu.org/r/bison-patches/2013-09/msg00000.html and following
+       exp (res): exp (a) '+' exp (b) { $res = $a + $b; };
 
-** Multiple start symbols
-Revert a70e75b8a41755ab96ab211a0ea111ac68a4aadd.
-Revert tests: disable "Multistart reports".
+I love this.  I have been bitten too often by the removal of the
+symbol, and forgetting to shift all the $n to $n-1.  If you are
+unlucky, it compiles...
 
-Would be very useful when parsing closely related languages.  The idea is to
-declare several start symbols, for instance
+But instead of using $a etc., we can use regular variables.  And
+instead of using (), I propose to use `:' (again).  Paul suggests
+supporting `->' in addition to `:' to separate LHS and RHS. In other
+words:
 
-    %start stmt expr
-    %%
-    stmt: ...
-    expr: ...
+       r:exp -> a:exp '+' b:exp { r = a + b; };
 
-and to generate parse(), parse_stmt() and parse_expr().  Technically, the
-above grammar would be transformed into
+That requires an significant improvement of the grammar parser.  Using
+GLR would be nice.  It also requires that Bison know the type of the
+symbols (which will be useful for %include anyway).  So we have some
+time before...
 
-   %start yy_start
-   %token YY_START_STMT YY_START_EXPR
-   %%
-   yy_start: YY_START_STMT stmt | YY_START_EXPR expr
+Note that there remains the problem of locations: `@r'?
 
-so that there are no new conflicts in the grammar (as would undoubtedly
-happen with yy_start: stmt | expr).  Then adjust the skeletons so that this
-initial token (YY_START_STMT, YY_START_EXPR) be shifted first in the
-corresponding parse function.
-
-*** Number of useless symbols
-AT_TEST(
-[[%start exp;
-exp: exp;]],
-[[input.y: warning: 2 nonterminals useless in grammar [-Wother]
-input.y: warning: 2 rules useless in grammar [-Wother]
-input.y:2.8-10: error: start symbol exp does not derive any sentence]])
-
-We should say "1 nonterminal": the other one is $accept, which should not
-participate in the count.
-
-*** Tokens
-Do we want to disallow terminal start symbols?  The limitation is not
-technical.  Can it be useful to someone to "parse" a token?
-
-** %include
-This is a popular demand.  We already made many changes in the parser that
-should make this reasonably easy to implement.
-
-Bruce Mardle <[email protected]>
-https://lists.gnu.org/r/bison-patches/2015-09/msg00000.html
-
-However, there are many other things to do before having such a feature,
-because I don't want a % equivalent to #include (which we all learned to
-hate).  I want something that builds "modules" of grammars, and assembles
-them together, paying attention to keep separate bits separated, in pseudo
-name spaces.
-
-** Push parsers
-There is demand for push parsers in C++.
-
-** Generate code instead of tables
-This is certainly quite a lot of work.  See
-https://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.50.4539.
 
 ** $-1
 We should find a means to provide an access to values deep in the
 stack.  For instance, instead of
 
-        baz: qux { $$ = $<foo>-1 + $<bar>0 + $1; }
+	baz: qux { $$ = $<foo>-1 + $<bar>0 + $1; }
 
 we should be able to have:
 
@@ -599,9 +99,8 @@ must be in the scanner: we must not parse what is in a switched off
 part of %if.  Akim Demaille thinks it should be in the parser, so as
 to avoid falling into another CPP mistake.
 
-(Later): I'm sure there's actually good case for this.  People who need that
-feature can use m4/cpp on top of Bison.  I don't think it is worth the
-trouble in Bison itself.
+** -D, --define-muscle NAME=VALUE
+To define muscles via cli.  Or maybe support directly NAME=VALUE?
 
 ** XML Output
 There are couple of available extensions of Bison targeting some XML
@@ -618,28 +117,88 @@ XML output for GNU Bison and gcc
 XML output for GNU Bison
    http://yaxx.sourceforge.net/
 
+* Unit rules
+Maybe we could expand unit rules, i.e., transform
+
+	exp: arith | bool;
+	arith: exp '+' exp;
+	bool: exp '&' exp;
+
+into
+
+	exp: exp '+' exp | exp '&' exp;
+
+when there are no actions.  This can significantly speed up some
+grammars.  I can't find the papers.  In particular the book `LR
+parsing: Theory and Practice' is impossible to find, but according to
+`Parsing Techniques: a Practical Guide', it includes information about
+this issue.  Does anybody have it?
+
+
+
+* Documentation
+
+** History/Bibliography
+Some history of Bison and some bibliography would be most welcome.
+Are there any Texinfo standards for bibliography?
+
+
+
+* Java, Fortran, etc.
+
+
 * Coding system independence
 Paul notes:
 
-        Currently Bison assumes 8-bit bytes (i.e. that UCHAR_MAX is
-        255).  It also assumes that the 8-bit character encoding is
-        the same for the invocation of 'bison' as it is for the
-        invocation of 'cc', but this is not necessarily true when
-        people run bison on an ASCII host and then use cc on an EBCDIC
-        host.  I don't think these topics are worth our time
-        addressing (unless we find a gung-ho volunteer for EBCDIC or
-        PDP-10 ports :-) but they should probably be documented
-        somewhere.
+	Currently Bison assumes 8-bit bytes (i.e. that UCHAR_MAX is
+	255).  It also assumes that the 8-bit character encoding is
+	the same for the invocation of 'bison' as it is for the
+	invocation of 'cc', but this is not necessarily true when
+	people run bison on an ASCII host and then use cc on an EBCDIC
+	host.  I don't think these topics are worth our time
+	addressing (unless we find a gung-ho volunteer for EBCDIC or
+	PDP-10 ports :-) but they should probably be documented
+	somewhere.
 
-        More importantly, Bison does not currently allow NUL bytes in
-        tokens, either via escapes (e.g., "x\0y") or via a NUL byte in
-        the source code.  This should get fixed.
+	More importantly, Bison does not currently allow NUL bytes in
+	tokens, either via escapes (e.g., "x\0y") or via a NUL byte in
+	the source code.  This should get fixed.
 
-* Broken options?
+* --graph
+Show reductions.
+
+* Broken options ?
 ** %token-table
 ** Skeleton strategy
 Must we keep %token-table?
 
+* src/print_graph.c
+Find the best graph parameters.
+
+* BTYacc
+See if we can integrate backtracking in Bison.  Charles-Henri de
+Boysson <[email protected]> is working on this, and already has some
+results.  Vadim Maslow, the maintainer of BTYacc was contacted, and we
+stay in touch with him.  Adjusting the Bison grammar parser will be
+needed to support some extra BTYacc features.  This is less urgent.
+
+** Keeping the conflicted actions
+First, analyze the differences between byacc and btyacc (I'm referring
+to the executables).  Find where the conflicts are preserved.
+
+** Compare with the GLR tables
+See how isomorphic the way BTYacc and the way the GLR adjustments in
+Bison are compatible.  *As much as possible* one should try to use the
+same implementation in the Bison executables.  I insist: it should be
+very feasible to use the very same conflict tables.
+
+** Adjust the skeletons
+Import the skeletons for C and C++.
+
+** Improve the skeletons
+Have them support yysymprint, yydestruct and so forth.
+
+
 * Precedence
 
 ** Partial order
@@ -647,7 +206,56 @@ It is unfortunate that there is a total order for precedence.  It
 makes it impossible to have modular precedence information.  We should
 move to partial orders (sounds like series/parallel orders to me).
 
-This is a prerequisite for modules.
+** Correlation b/w precedence and associativity
+Also, I fail to understand why we have to assign the same
+associativity to operators with the same precedence.  For instance,
+why can't I decide that the precedence of * and / is the same, but the
+latter is nonassoc?
+
+If there is really no profound motivation, we should find a new syntax
+to allow specifying this.
+
+** RR conflicts
+See if we can use precedence between rules to solve RR conflicts.  See
+what POSIX says.
+
+
+* $undefined
+From Hans:
+- If the Bison generated parser experiences an undefined number in the
+character range, that character is written out in diagnostic messages, an
+addition to the $undefined value.
+
+Suggest: Change the name $undefined to undefined; looks better in outputs.
+
+
+* Default Action
+From Hans:
+- For use with my C++ parser, I transported the "switch (yyn)" statement
+that Bison writes to the bison.simple skeleton file. This way, I can remove
+the current default rule $$ = $1 implementation, which causes a double
+assignment to $$ which may not be OK under C++, replacing it with a
+"default:" part within the switch statement.
+
+Note that the default rule $$ = $1, when typed, is perfectly OK under C,
+but in the C++ implementation I made, this rule is different from
+$<type_name>$ = $<type_name>1. I therefore think that one should implement
+a Bison option where every typed default rule is explicitly written out
+(same typed ruled can of course be grouped together).
+
+Note: Robert Anisko handles this.  He knows how to do it.
+
+
+* Warnings
+It would be nice to have warning support.  See how Autoconf handles
+them, it is fairly well described there.  It would be very nice to
+implement this in such a way that other programs could use
+lib/warnings.[ch].
+
+Don't work on this without first announcing you do, as I already have
+thought about it, and know many of the components that can be used to
+implement it.
+
 
 * Pre and post actions.
 From: Florian Krohm <[email protected]>
@@ -680,48 +288,21 @@ to bison. If you're interested, I'll work on a patch.
 * Better graphics
 Equip the parser with a means to create the (visual) parse tree.
 
-
 -----
 
-# LocalWords:  Cex gnulib gl Bistromathic TokenKinds yylex enum YYEOF EOF
-# LocalWords:  YYerror gettext af hb YYERRCODE undef calc FIXME dev yyerror
-# LocalWords:  Autoconf YYUNDEFTOK lexemes parsers Bistromathic's yyreport
-# LocalWords:  const argc yacc yyclearin lookahead destructor Rici incluent
-# LocalWords:  yydestruct yydiscardin catégories d'avertissements sr activé
-# LocalWords:  conflits défaut rr l'alias chaîne n'est attaché un symbole
-# LocalWords:  obsolète règle vide midrule valeurs de intermédiaire ou avec
-# LocalWords:  définies inutilisées priorité associativité inutiles POSIX
-# LocalWords:  incompatibilités tous les autres avertissements sauf dans rp
-# LocalWords:  désactiver CATEGORIE traiter comme des erreurs glr Akim bool
-# LocalWords:  Demaille arith lalr goto struct pathlen nullable ntokens lr
-# LocalWords:  nterm bitsetv ielr ritem nstates nrules nritems yysymbol EQ
-# LocalWords:  SymbolKind YYEMPTY YYUNDEF YYTNAME NUM yyntokens yytname sed
-# LocalWords:  nonterminals yykind yycode YYNAMES yynames init getName conv
-# LocalWords:  TokenKind ival yychar yylval yylexer Tolmer hoc
-# LocalWords:  Sobisch YYPTRDIFF ptrdiff Autotest toknum yytoknum
-# LocalWords:  sym Wother stderr FP fixits xgettext fdiagnostics Graphviz
-# LocalWords:  graphviz VCG bitset xml bw maint yytoken YYABORT deps
-# LocalWords:  YYACCEPT yytranslate nonnegative destructors yyerrlab repo
-# LocalWords:  backends stmt expr yy Mardle baz qux Vadim Maslow CPP cpp
-# LocalWords:  yydebug gcc UCHAR EBCDIC gung PDP NUL Pre Florian Krohm utf
-# LocalWords:  YYACT YYLLOC YYLSP yyval yyvsp yylen yyloc yylsp endif
-# LocalWords:  ispell american
-
-Local Variables:
-mode: outline
-coding: utf-8
-fill-column: 76
-ispell-dictionary: "american"
-End:
-
-Copyright (C) 2001-2004, 2006, 2008-2015, 2018-2022, 2025-2026 Free
-Software Foundation, Inc.
+Copyright (C) 2001-2004, 2006, 2009-2010 Free Software Foundation, Inc.
 
 This file is part of Bison, the GNU Compiler Compiler.
 
-Permission is granted to copy, distribute and/or modify this document
-under the terms of the GNU Free Documentation License, Version 1.3 or
-any later version published by the Free Software Foundation; with no
-Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
-Texts.  A copy of the license is included in the "GNU Free
-Documentation License" file as part of this distribution.
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.

autogen.sh

@@ -1,39 +0,0 @@
-#!/bin/sh
-# Convenience script for regenerating all autogeneratable files that are
-# omitted from the version control repository. In particular, this script
-# also regenerates all aclocal.m4, config.h.in, Makefile.in, configure files
-# with new versions of autoconf or automake.
-
-# Copyright (C) 2003-2026 Free Software Foundation, Inc.
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# Originally written by Paul Eggert.  The canonical version of this
-# script is maintained as top/autogen.sh in gnulib.  However, to be
-# useful to your package, you should place a copy of it under version
-# control in the top-level directory of your package.  The intent is
-# that all customization can be done with a bootstrap.conf file also
-# maintained in your version control; gnulib comes with a template
-# build-aux/bootstrap.conf to get you started.
-#
-# Alternatively, you can use an autogen.sh script that is specific
-# to your package.
-
-me="$0"
-medir=`dirname "$me"`
-
-# Read the function library and the configuration.
-. "$medir"/bootstrap-funclib.sh
-
-autogen "$@"

autopull.sh

@@ -1,37 +0,0 @@
-#!/bin/sh
-# Convenience script for fetching auxiliary files that are omitted from
-# the version control repository of this package.
-
-# Copyright (C) 2003-2026 Free Software Foundation, Inc.
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# Originally written by Paul Eggert.  The canonical version of this
-# script is maintained as top/autopull.sh in gnulib.  However, to be
-# useful to your package, you should place a copy of it under version
-# control in the top-level directory of your package.  The intent is
-# that all customization can be done with a bootstrap.conf file also
-# maintained in your version control; gnulib comes with a template
-# build-aux/bootstrap.conf to get you started.
-#
-# Alternatively, you can use an autopull.sh script that is specific
-# to your package.
-
-me="$0"
-medir=`dirname "$me"`
-
-# Read the function library and the configuration.
-. "$medir"/bootstrap-funclib.sh
-
-autopull "$@"

bootstrap.conf

@@ -1,7 +1,6 @@
 # Bootstrap configuration.
 
-# Copyright (C) 2006-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
+# Copyright (C) 2006-2010 Free Software Foundation, Inc.
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -14,113 +13,55 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # gnulib modules used by this package.
 gnulib_modules='
-  argmatch array-list assert assure attribute
-  bitsetv
-  calloc-posix close closeout config-h c-strcase c-strtod
-  configmake
-  dirname
-  error execute extensions
-  fopen-safer fstrcmp
-  getopt-gnu
-  gettext-h git-version-gen gitlog-to-changelog
-  gpl-3.0 intprops inttypes isnan javacomp-script
-  hash-map
-  javaexec-script
-  ldexpl
-  libtextstyle-optional
-  linked-list
-  malloc-gnu
-  mcel-prefer
-  mbfile mbswidth
-  obstack
-  obstack-printf
-  perror progname
-  quote quotearg
-  rbtreehash-list
-  readline
-  readme-release
-  realloc-posix
-  relocatable-prog relocatable-script
-  rename
-  spawn-pipe stdbool stpcpy stpncpy strdup-posix strerror strverscmp
-  sys_ioctl
-  termios
-  timevar
-  unicodeio unistd unistd-safer unlink unlocked-io
-  update-copyright unsetenv verify
-  warnings
-  winsz-ioctl
-  winsz-termios
-  xalloc
-  xalloc-die
-  xconcat-filename
-  xhash
-  xlist
-  xmap xmemdup0
-  xstrndup
-
-  fprintf-posix printf-posix snprintf-posix sprintf-posix
-  vsnprintf-posix vsprintf-posix
+  announce-gen argmatch assert config-h c-strcase configmake dirname
+  error extensions fopen-safer gendocs getopt-gnu gettext
+  git-version-gen hash inttypes javacomp-script javaexec-script
+  maintainer-makefile malloc mbswidth obstack pipe quote quotearg
+  stdbool stpcpy strerror strtoul strverscmp unistd unistd-safer
+  unlocked-io update-copyright unsetenv verify warnings xalloc
+  xalloc-die xstrndup
 '
 
-checkout_only_file=README-hacking.md
-
 # Additional xgettext options to use.  Use "\\\newline" to break lines.
 XGETTEXT_OPTIONS=$XGETTEXT_OPTIONS'\\\
  --from-code=UTF-8\\\
  --flag=asprintf:2:c-format\\\
- --flag=complain:3:c-format\\\
- --flag=complain_indent:4:c-format\\\
+ --flag=complain:1:c-format --flag=complain_at:2:c-format\\\
+ --flag=fatal:1:c-format --flag=fatal_at:2:c-format\\\
+ --flag=warn:1:c-format  --flag=warn_at:2:c-format\\\
  --flag=unexpected_end:2:c-format\\\
 '
 XGETTEXT_OPTIONS_RUNTIME=$XGETTEXT_OPTIONS'\\\
  --keyword=YY_ \\\
 '
 
-gnulib_tool_option_extras="\
- --automake-subdir\
- --automake-subdir-tests\
- --avoid=mbiterf\
- --conditional-dependencies\
- --makefile-name=gnulib.mk\
- --po-base=gnulib-po\
- --po-domain=bison\
- --symlink\
-"
+# Gettext supplies these files, but we don't need them since
+# we don't have an intl subdirectory.
+excluded_files='
+    m4/codeset.m4
+    m4/glibc2.m4
+    m4/glibc21.m4
+    m4/intdiv0.m4
+    m4/intl.m4
+    m4/intldir.m4
+    m4/intmax.m4
+    m4/inttypes_h.m4
+    m4/lcmessage.m4
+    m4/lock.m4
+    m4/longdouble.m4
+    m4/printf-posix.m4
+    m4/signed.m4
+    m4/size_max.m4
+    m4/uintmax_t.m4
+    m4/ulonglong.m4
+    m4/visibility.m4
+    m4/xsize.m4
+'
 
-gnulib_extra_files="$gnulib_extra_files build-aux/move-if-change"
-
-gnulib_extra_files="$gnulib_extra_files build-aux/epsf.tex"
-
-bootstrap_post_import_hook()
-{
-  # Ensure that ChangeLog exists, for automake.
-  test -f ChangeLog || touch ChangeLog
-}
-
-bootstrap_epilogue()
-{
-  # Make sure we don't need src/bison, which usually doesn't exist at
-  # the time of a bootstrap.
-  touch src/parse-gram.[ch]
-
-  perl -pi -e "s/\@PACKAGE\@/$package/g" README-release
-
-  # Bison currently uses Gettext 0.19, but the gnulib-po module
-  # imports files from more recent versions of Gettext that are not
-  # yet available widely enough (e.g., not in bionic, used by the CI).
-  # Work around this.  Don't use autopoint, which sends some other
-  # files in the past.
-  cp po/Makefile.in.in gnulib-po
-}
-
-# Keep our bootstrap script in sync with gnulib's.  If we ever need to
-# maintain our own bootstrap script again, set this to false, remove
-# the bootstrap entry from the file .x-update-copyright, and add any
-# needed copyright years to the copyright statement in the bootstrap
-# script.
-bootstrap_sync=true
+# In directories like lib/, m4/, and po/, generate both these files because we
+# still try to support CVS emulation.
+vc_ignore='.cvsignore .gitignore'

build-aux/.cvsignore

@@ -0,0 +1,23 @@
+Makefile
+Makefile.in
+announce-gen
+arg-nonnull.h
+compile
+config.guess
+config.rpath
+config.sub
+depcomp
+gendocs.sh
+git-version-gen
+install-sh
+javacomp.sh.in
+javaexec.sh.in
+link-warning.h
+mdate-sh
+missing
+texinfo.tex
+update-copyright
+useless-if-before-free
+vc-list-files
+warn-on-use.h
+ylwrap

build-aux/.gitignore

@@ -1,29 +1,23 @@
+/Makefile
+/Makefile.in
 /announce-gen
+/arg-nonnull.h
 /compile
 /config.guess
-/config.libpath
 /config.rpath
 /config.sub
 /depcomp
-/do-release-commit-and-tag
-/epsf.tex
 /gendocs.sh
 /git-version-gen
-/gitlog-to-changelog
-/gnu-web-doc-update
-/gnupload
-/install-reloc
 /install-sh
 /javacomp.sh.in
 /javaexec.sh.in
-/libtool-reloc
+/link-warning.h
 /mdate-sh
 /missing
-/reloc-ldflags
-/relocatable.sh.in
-/test-driver
 /texinfo.tex
 /update-copyright
 /useless-if-before-free
 /vc-list-files
+/warn-on-use.h
 /ylwrap

build-aux/Darwin.valgrind

@@ -1,65 +0,0 @@
-# Copyright (C) 2012-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# Valgrind suppression file for Bison.
-
-{
-   Mac OS X initialization
-   Memcheck:Leak
-   fun:?alloc*
-   ...
-   fun:*ImageLoader*
-}
-
-{
-   Mac OS X initialization
-   Memcheck:Leak
-   fun:?alloc*
-   ...
-   fun:*dyld*
-}
-
-{
-   Mac OS X initialization
-   Memcheck:Leak
-   fun:?alloc*
-   ...
-   fun:__CFInitialize
-}
-
-{
-   Mac OS X I/O buffer
-   Memcheck:Leak
-   fun:malloc
-   fun:__smakebuf
-   fun:__swsetup
-   fun:__sfvwrite
-   fun:fwrite
-}
-
-{
-   Mac OS X I/O buffer
-   Memcheck:Leak
-   fun:malloc
-   fun:__smakebuf
-   fun:__swsetup
-   fun:__swbuf
-   fun:putchar
-}
-
-# Local Variables:
-# mode: shell-script
-# End:

build-aux/Linux.valgrind

@@ -1,62 +0,0 @@
-# Copyright (C) 2012-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# Valgrind suppression file for Bison.
-
-# Travis Trusty, 2018-09-07.
-{
-   libstdcxx_init
-   Memcheck:Leak
-   match-leak-kinds: reachable
-   fun:malloc
-   obj:/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.25
-   fun:call_init.part.0
-   fun:call_init
-   fun:_dl_init
-   obj:/lib/x86_64-linux-gnu/ld-2.19.so
-}
-
-# Linux prague 4.1.2-2-ARCH #1 SMP PREEMPT Wed Jul 15 08:30:32 UTC 2015
-# x86_64 GNU/Linux
-{
-   Probably exception handling from G++ 5.1.
-   Memcheck:Leak
-   match-leak-kinds: reachable
-   fun:malloc
-   fun:pool
-   fun:__static_initialization_and_destruction_0
-   fun:_GLOBAL__sub_I_eh_alloc.cc
-   fun:call_init.part.0
-   fun:_dl_init
-   obj:/usr/lib/ld-2.21.so
-}
-
-# Linux seattle 2.6.32-5-amd64 #1 SMP Thu Mar 22 17:26:33 UTC 2012
-# x86_64 GNU/Linux
-{
-   index
-   Memcheck:Cond
-   fun:index
-   fun:expand_dynamic_string_token
-   fun:_dl_map_object
-   fun:map_doit
-   fun:_dl_catch_error
-   fun:do_preload
-   fun:dl_main
-   fun:_dl_sysdep_start
-   fun:_dl_start
-   obj:/lib/ld-2.11.3.so
-}

build-aux/Makefile.am

@@ -0,0 +1,2 @@
+## Process this file with automake to produce Makefile.in -*-Makefile-*-
+EXTRA_DIST = prev-version.txt cross-options.pl update-b4-copyright

build-aux/cross-options.pl

@@ -1,104 +1,51 @@
 #! /usr/bin/env perl
 
-# Generate a release announcement message.
-
-# Copyright (C) 2007-2022, 2025-2026 Free Software Foundation, Inc.
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-#
-# Written by Akim Demaille.
-
 use warnings;
 use 5.005;
 use strict;
 
 my %option;
-my %directive;
-my $scanner = `grep -i '"%[a-z]' $ARGV[0]`;
-$scanner =~ s/"\[-_\]"/-/g;
-while (<STDIN>)
+while (<>)
 {
     if (/^\s*             # Initial spaces.
         (?:(-\w),\s+)?    # $1: $short: Possible short option.
-        (--[-\w]+)        # $2: $long:  Mandatory long option.
+        (--[-\w]+)        # $2: $long:  Long option.
         (\[?)             # $3: $opt:   '[' iff the argument is optional.
         (?:=(\S+))?       # $4: $arg:   Possible argument name.
         \s                # Spaces.
         /x)
     {
-        my ($short, $long, $opt, $arg) = ($1, $2, $3, $4);
-        $short = '' if ! defined $short;
-        $short = '-d' if $long eq '--defines' && ! $short;
-        my $dir = '%' . substr($long, 2);
-        if (index ($scanner, "\"$dir\"") < 0)
-        {
-          if ($long eq '--force-define') { $dir = '%define'; }
-          else { $dir = ''; }
-        }
-        if ($arg)
-        {
+	my ($short, $long, $opt, $arg) = ($1, $2, $3, $4);
+	$short = defined $short ? '@option{' . $short . '}' : '';
+	if ($arg)
+	{
             # if $opt, $arg contains the closing ].
             substr ($arg, -1) = ''
                 if $opt eq '[';
+	    $arg =~ s/^=//;
             $arg = lc ($arg);
-            my $dir_arg = $arg;
-            # If the argument is complete (e.g., for --define[=NAME[=VALUE]]),
+            # If the argument is compite (e.g., for --define[=NAME[=VALUE]]),
             # put each word in @var, to build @var{name}[=@var{value}], not
             # @var{name[=value]}].
-            $arg =~ s/(\w+)/\@var{$1}/g;
-            my $long_arg = "=$arg";
-            if ($opt eq '[') {
-              $long_arg = "[$long_arg]";
-              $arg = "[$arg]";
-            }
-            # For arguments of directives: this only works if all arguments
-            # are strings and have the same syntax as on the command line.
-            if ($dir_arg eq 'name[=value]')
-            {
-                # -D/-F do not add quotes to the argument.
-                $dir_arg =
-                    $dir eq "%define"
-                    ? '@var{name} [@var{value}]'
-                    : '@var{name} ["@var{value}"]';
-            }
-            else
-            {
-                $dir_arg =~ s/(\w+)/\@var{"$1"}/g;
-                $dir_arg = '[' . $dir_arg . ']'
-                    if $opt eq '[';
-            }
-            $long = "$long$long_arg";
-            $short = "$short $arg" if $short && $short ne '-d';
-            $dir = "$dir $dir_arg" if $dir;
-        }
-        $option{$long} = $short;
-        $directive{$long} = $dir;
+	    $arg =~ s/(\w+)/\@var{$1}/g;
+	    my $long_arg = "=$arg";
+	    if ($opt eq '[') {
+	      $long_arg = "[$long_arg]";
+	      $arg = "[$arg]";
+	    }
+	    $option{"$long$long_arg"} = $short ? "$short $arg" : '';
+	}
+	else
+	{
+	    $option{"$long"} = "$short";
+	}
     }
 }
 
-my $sep = '';
 foreach my $long (sort keys %option)
 {
-    # Couldn't find a means to escape @ in the format (for @item, @tab), so
-    # pass it as a literal to print.
-format STDOUT =
-@item @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< @tab @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< @tab @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
-{
-  '@', '@option{' . $long . '}',
-  '@', $option{$long} ? ('@option{' . $option{$long} . '}') : '',
-  '@', $directive{$long} ? ('@code{' . $directive{$long} . '}') : ''
-}
-.
-    write;
+    # Avoid trailing spaces.
+    printf ("\@item %-40s \@tab%s\n",
+            '@option{' . $long . '}',
+            $option{$long} ? " $option{$long}" : "");
 }

build-aux/git-log-fix

@@ -1,11 +0,0 @@
-# This file is expected to be used via gitlog-to-changelog's --amend=FILE
-# option.  It specifies what changes to make to each given SHA1's commit
-# log and metadata, using Perl-eval'able expressions.
-
-975bb564319aa4f4204c48aba265757ba207a80f
-s/Edligner/Edlinger/;
-
-0db2648930e3b6c376a539aabe368aade83ee29a
-s/--flags/--feature/;
-s/flag_flag/feature_flag/;
-s/\bflag\b/feature/;

build-aux/install-icc.sh

@@ -1,234 +0,0 @@
-#!/bin/sh
-
-# Install Intel Parallel Studio on Travis CI
-# https://github.com/nemequ/icc-travis
-#
-# Originally written for Squash <https://github.com/quixdb/squash> by
-# Evan Nemerson.  For documentation, bug reports, support requests,
-# etc. please use <https://github.com/nemequ/icc-travis>.
-#
-# To the extent possible under law, the author(s) of this script have
-# waived all copyright and related or neighboring rights to this work.
-# See <https://creativecommons.org/publicdomain/zero/1.0/> for
-# details.
-
-# Tools - Not very useful in non-interactive mode.
-COMPONENTS_VTUNE="intel-vtune-amplifier-xe-2016-cli__x86_64;intel-vtune-amplifier-xe-2016-common__noarch;intel-vtune-amplifier-xe-2016-cli-common__noarch;intel-vtune-amplifier-xe-2016-collector-64linux__x86_64;intel-vtune-amplifier-xe-2016-sep__noarch;intel-vtune-amplifier-xe-2016-gui-common__noarch;intel-vtune-amplifier-xe-2016-gui__x86_64;intel-vtune-amplifier-xe-2016-common-pset__noarch"
-COMPONENTS_INSPECTOR="intel-inspector-xe-2016-cli__x86_64;intel-inspector-xe-2016-cli-common__noarch;intel-inspector-xe-2016-gui-common__noarch;intel-inspector-xe-2016-gui__x86_64;intel-inspector-xe-2016-cli-pset__noarch"
-COMPONENTS_ADVISOR="intel-advisor-xe-2016-cli__x86_64;intel-advisor-xe-2016-cli-common__noarch;intel-advisor-xe-2016-gui-common__noarch;intel-advisor-xe-2016-gui__x86_64;intel-advisor-xe-2016-cli-pset__noarch"
-COMPONENTS_GDB="intel-gdb-gt__x86_64;intel-gdb-gt-src__noarch;intel-gdb-gt-libelfdwarf__x86_64;intel-gdb-gt-devel__x86_64;intel-gdb-gt-common__noarch;intel-gdb-ps-cdt__x86_64;intel-gdb-ps-cdt-source__x86_64;intel-gdb-ps-mic__x86_64;intel-gdb-ps-mpm__x86_64;intel-gdb__x86_64;intel-gdb-source__noarch;intel-gdb-python-source__noarch;intel-gdb-common__noarch;intel-gdb-ps-common__noarch"
-
-# Parallel libraries
-COMPONENTS_MPI="intel-mpi-rt-core__x86_64;intel-mpi-rt-mic__x86_64;intel-mpi-sdk-core__x86_64;intel-mpi-sdk-mic__x86_64;intel-mpi-psxe__x86_64;intel-mpi-rt-psxe__x86_64"
-COMPONENTS_TBB="intel-tbb-libs__noarch;intel-mkl-ps-tbb__x86_64;intel-mkl-ps-tbb-devel__x86_64;intel-mkl-ps-tbb-mic__x86_64;intel-mkl-ps-tbb-mic-devel__x86_64;intel-tbb-source__noarch;intel-tbb-devel__noarch;intel-tbb-common__noarch;intel-tbb-ps-common__noarch;intel-tbb-psxe__noarch"
-COMPONENTS_MKL="intel-mkl__x86_64;intel-mkl-ps__x86_64;intel-mkl-common__noarch;intel-mkl-ps-common__noarch;intel-mkl-devel__x86_64;intel-mkl-ps-mic-devel__x86_64;intel-mkl-ps-f95-devel__x86_64;intel-mkl-gnu-devel__x86_64;intel-mkl-ps-gnu-devel__x86_64;intel-mkl-ps-pgi-devel__x86_64;intel-mkl-sp2dp-devel__x86_64;intel-mkl-ps-cluster-devel__x86_64;intel-mkl-ps-cluster-common__noarch;intel-mkl-ps-f95-common__noarch;intel-mkl-ps-cluster__x86_64;intel-mkl-gnu__x86_64;intel-mkl-ps-gnu__x86_64;intel-mkl-ps-pgi__x86_64;intel-mkl-sp2dp__x86_64;intel-mkl-ps-mic__x86_64;intel-mkl-ps-tbb__x86_64;intel-mkl-ps-tbb-devel__x86_64;intel-mkl-ps-tbb-mic__x86_64;intel-mkl-ps-tbb-mic-devel__x86_64;intel-mkl-psxe__noarch"
-COMPONENTS_IPP="intel-ipp-l-common__noarch;intel-ipp-l-ps-common__noarch;intel-ipp-l-st__x86_64;intel-ipp-l-mt__x86_64;intel-ipp-l-st-devel__x86_64;intel-ipp-l-ps-st-devel__x86_64;intel-ipp-l-mt-devel__x86_64;intel-ipp-psxe__noarch"
-COMPONENTS_IPP_CRYPTO="intel-crypto-ipp-st-devel__x86_64;intel-crypto-ipp-ps-st-devel__x86_64;intel-crypto-ipp-st__x86_64;intel-crypto-ipp-mt-devel__x86_64;intel-crypto-ipp-mt__x86_64;intel-crypto-ipp-ss-st-devel__x86_64;intel-crypto-ipp-common__noarch"
-COMPONENTS_DAAL="intel-daal__x86_64;intel-daal-common__noarch"
-
-# Compilers
-COMPONENTS_OPENMP="intel-openmp-l-all__x86_64;intel-openmp-l-ps-mic__x86_64;intel-openmp-l-ps__x86_64;intel-openmp-l-ps-ss__x86_64;intel-openmp-l-all-devel__x86_64;intel-openmp-l-ps-mic-devel__x86_64;intel-openmp-l-ps-devel__x86_64;intel-openmp-l-ps-ss-devel__x86_64"
-COMPONENTS_COMPILER_COMMON="intel-comp-l-all-vars__noarch;intel-comp-l-all-common;intel-comp-l-ps-common;intel-comp-l-all-devel;intel-comp-l-ps-ss-devel;intel-comp-l-ps-ss-wrapper;intel-comp-l-all-devel;intel-comp-l-ps-devel__x86_64;intel-comp-l-ps-ss-devel__x86_64;intel-psf-intel__x86_64;intel-icsxe-pset;intel-ipsf__noarch;intel-ccompxe__noarch;${COMPONENTS_OPENMP}"
-COMPONENTS_IFORT="intel-ifort-l-ps__x86_64;intel-ifort-l-ps-vars__noarch;intel-ifort-l-ps-common__noarch;intel-ifort-l-ps-devel__x86_64;${COMPONENTS_COMPILER_COMMON}"
-COMPONENTS_ICC="intel-icc-l-all__x86_64;intel-icc-l-ps-ss__x86_64;intel-icc-l-all-vars__noarch;intel-icc-l-all-common__noarch;intel-icc-l-ps-common__noarch;intel-icc-l-all-devel__x86_64;intel-icc-l-ps-devel__x86_64;intel-icc-l-ps-ss-devel__x86_64;${COMPONENTS_COMPILER_COMMON}"
-
-DESTINATION="${HOME}/intel"
-TEMPORARY_FILES="/tmp"
-PHONE_INTEL="no"
-COMPONENTS=""
-
-add_components() {
-    if [ ! -z "${COMPONENTS}" ]; then
-	COMPONENTS="${COMPONENTS};$1"
-    else
-	COMPONENTS="$1"
-    fi
-}
-
-while [ $# != 0 ]; do
-    case "$1" in
-	"--dest")
-	    DESTINATION="$(realpath "$2")"; shift
-	    ;;
-	"--tmpdir")
-	    TEMPORARY_FILES="$2"; shift
-	    ;;
-	"--components")
-	    shift
-	    OLD_IFS="${IFS}"
-	    IFS=","
-	    for component in $1; do
-		case "$component" in
-		    "icc")
-			add_components "${COMPONENTS_ICC}"
-		        ;;
-		    "mpi")
-			add_components "${COMPONENTS_MPI}"
-			;;
-		    "vtune")
-			add_components "${COMPONENTS_VTUNE}"
-			;;
-		    "inspector")
-			add_components "${COMPONENTS_INSPECTOR}"
-			;;
-		    "advisor")
-			add_components "${COMPONENTS_ADVISOR}"
-			;;
-		    "tbb")
-			add_components "${COMPONENTS_TBB}"
-			;;
-		    "ifort")
-			add_components "${COMPONENTS_IFORT}"
-			;;
-		    "mkl")
-			add_components "${COMPONENTS_MKL}"
-			;;
-		    "openmp")
-			# Noop, here for compatability.  OpenMP is installed with icc and ifort now.
-			;;
-		    "ipp")
-			add_components "${COMPONENTS_IPP}"
-			;;
-		    "ipp-crypto")
-			add_components "${COMPONENTS_IPP_CRYPTO}"
-			;;
-		    "gdb")
-			add_components "${COMPONENTS_GDB}"
-			;;
-		    "daal")
-			add_components "${COMPONENTS_DAAL}"
-			;;
-		    *)
-			echo "Unknown component '$component'"
-			exit 1
-			;;
-		esac
-	    done
-	    IFS="${OLD_IFS}"
-	    ;;
-	*)
-	    echo "Unrecognized argument '$1'"
-	    exit 1
-	    ;;
-    esac
-    shift
-done
-
-if [ -z "${COMPONENTS}" ]; then
-    COMPONENTS="${COMPONENTS_ICC}"
-fi
-
-INSTALLER_SCRIPT="parallel_studio_xe_2016_update3_online.sh"
-INSTALLER="${TEMPORARY_FILES}/${INSTALLER_SCRIPT}"
-INSTALLER_URL="http://registrationcenter-download.intel.com/akdlm/irc_nas/9061/${INSTALLER_SCRIPT}"
-SILENT_CFG="${TEMPORARY_FILES}/silent.cfg"
-SUCCESS_INDICATOR="${TEMPORARY_FILES}/icc-travis-success"
-
-if [ ! -e "${TEMPORARY_FILES}" ]; then
-    echo "${TEMPORARY_FILES} does not exist, creating..."
-    mkdir -p "${TEMPORARY_FILES}" || (sudo mkdir -p "${TEMPORARY_FILES}" && sudo chown -R "${USER}:${USER}" "${TEMPORARY_FILES}")
-fi
-
-if [ ! -e "${DESTINATION}" ]; then
-    echo "${DESTINATION} does not exist, creating..."
-    mkdir -p "${DESTINATION}" || (sudo mkdir -p "${DESTINATION}" && sudo chown -R "${USER}:${USER}" "${DESTINATION}")
-fi
-
-if [ ! -e "${INSTALLER}" ]; then
-	wget -O "${INSTALLER}" "${INSTALLER_URL}" || exit 1
-fi
-chmod u+x "${INSTALLER}"
-
-# See https://software.intel.com/en-us/articles/intel-composer-xe-2015-silent-installation-guide
-echo "# Generated silent configuration file" > "${SILENT_CFG}"
-echo "ACCEPT_EULA=accept" >> "${SILENT_CFG}"
-echo "INSTALL_MODE=NONRPM" >> "${SILENT_CFG}"
-echo "CONTINUE_WITH_OPTIONAL_ERROR=yes" >> "${SILENT_CFG}"
-echo "PSET_INSTALL_DIR=${DESTINATION}" >> "${SILENT_CFG}"
-echo "CONTINUE_WITH_INSTALLDIR_OVERWRITE=yes" >> "${SILENT_CFG}"
-echo "COMPONENTS=${COMPONENTS}" >> "${SILENT_CFG}"
-echo "PSET_MODE=install" >> "${SILENT_CFG}"
-echo "PHONEHOME_SEND_USAGE_DATA=${PHONE_INTEL}" >> "${SILENT_CFG}"
-if [ "x" != "x${INTEL_SERIAL_NUMBER}" ]; then
-    echo "ACTIVATION_SERIAL_NUMBER=${INTEL_SERIAL_NUMBER}" >> "${SILENT_CFG}"
-    echo "ACTIVATION_TYPE=serial_number" >> "${SILENT_CFG}"
-else
-    echo "ACTIVATION_TYPE=trial_lic" >> "${SILENT_CFG}"
-fi
-
-attempt=1;
-while [ $attempt -le 3 ]; do
-    if [ ! -e "${TEMPORARY_FILES}/parallel-studio-install-data" ]; then
-	mkdir -p "${TEMPORARY_FILES}/parallel-studio-install-data" || (sudo mkdir -p "${TEMPORARY_FILES}/parallel-studio-install-data" && sudo chown -R "${USER}:${USER}" "${TEMPORARY_FILES}")
-    fi
-
-    ("${INSTALLER}" \
-	 -t "${TEMPORARY_FILES}/parallel-studio-install-data" \
-	 -s "${SILENT_CFG}" \
-	 --cli-mode \
-	 --user-mode && \
-	 touch "${SUCCESS_INDICATOR}") &
-
-    # So Travis doesn't die in case of a long download/installation.
-    #
-    # NOTE: a watched script never terminates.
-    elapsed=0;
-    while kill -0 $! 2>/dev/null; do
-	sleep 1
-	elapsed=$(expr $elapsed + 1)
-	if [ $(expr $elapsed % 60) -eq 0 ]; then
-	    mins_elapsed=$(expr $elapsed / 60)
-	    if [ $mins_elapsed = 1 ]; then
-		minute_string="minute"
-	    else
-		minute_string="minutes"
-	    fi
-	    echo "Still running... (about $(expr $elapsed / 60) ${minute_string} so far)."
-	fi
-    done
-
-    if [ ! -e "${SUCCESS_INDICATOR}" ]; then
-	echo "Installation failed."
-	exit 1
-    fi
-
-    if [ ! -e "${DESTINATION}/bin/compilervars.sh" ]; then
-	# Sometimes the installer returns successfully without actually
-	# installing anything.  Let's try again…
-	echo "Installation attempt #${attempt} completed, but unable to find compilervars.sh."
-	find "${DESTINATION}"
-    else
-	break
-    fi
-
-    rm -vrf "${TEMPORARY_FILES}/parallel-studio-install-data"
-    echo "Trying again..."
-
-    attempt=$(expr $attempt + 1)
-done
-
-if [ ! -e "${DESTINATION}/bin/compilervars.sh" ]; then
-	echo "Installation failed."
-	exit 1
-fi
-
-# Apparently the installer drops the license file in a location it
-# doesn't know to check.
-ln -s "${DESTINATION}"/licenses ~/Licenses
-
-# Add configuration information to ~/.bashrc.  Unfortunately this will
-# not be picked up automatically by Travis, so you'll still need to
-# source ~/.bashrc in your .travis.yml
-#
-# Container-based builds include a `[ -z "$PS1" ] && return` near the
-# beginning of the file, so appending won't work, we'll need to
-# prepend.
-echo "export INTEL_INSTALL_PATH=\"${DESTINATION}\"" >> ~/.bashrc-intel
-echo ". \"\${INTEL_INSTALL_PATH}/bin/compilervars.sh\" intel64" >> ~/.bashrc-intel
-echo "export LD_LIBRARY_PATH=\"\${INTEL_INSTALL_PATH}/ism/bin/intel64:\${INTEL_INSTALL_PATH}/lib/intel64_lin:\$LD_LIBRARY_PATH\"" >> ~/.bashrc-intel
-echo "export PATH=\"\${INTEL_INSTALL_PATH}/bin:\$PATH\"" >> ~/.bashrc-intel
-echo "function uninstall_intel_software {" >> ~/.bashrc-intel
-echo "  find \"\${INTEL_INSTALL_PATH}\" -name 'uninstall.sh' -not -path '*/ism/uninstall.sh' -exec {} -s \;" >> ~/.bashrc-intel
-echo "}" >> ~/.bashrc-intel
-cat ~/.bashrc >> ~/.bashrc-intel
-mv ~/.bashrc-intel ~/.bashrc

build-aux/local.mk

@@ -1,24 +0,0 @@
-## Copyright (C) 2000-2015, 2018-2022, 2025-2026 Free Software
-## Foundation, Inc.
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 3 of the License, or
-## (at your option) any later version.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-EXTRA_DIST +=					\
-  build-aux/Darwin.valgrind			\
-  build-aux/Linux.valgrind			\
-  build-aux/cross-options.pl			\
-  build-aux/epsf.tex				\
-  build-aux/move-if-change			\
-  build-aux/prev-version.txt			\
-  build-aux/update-b4-copyright

build-aux/update-b4-copyright

@@ -3,9 +3,8 @@
 # Update b4_copyright invocations or b4_copyright_years definitions to
 # include the current year.
 
-# Copyright (C) 2009-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
-
+# Copyright (C) 2009-2010 Free Software Foundation, Inc.
+#
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation; either version 3, or (at your option)
@@ -17,7 +16,7 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 use strict;
 use warnings;

build-aux/update-package-copyright-year

@@ -2,8 +2,7 @@
 
 # In configure.ac, update PACKAGE_COPYRIGHT_YEAR to the current year.
 
-# Copyright (C) 2010-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
+# Copyright (C) 2010 Free Software Foundation, Inc.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -16,7 +15,7 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 use strict;
 use warnings;

build-aux/update-test

@@ -1,122 +0,0 @@
-#! /usr/bin/env python
-
-# Update expectations in an Autotest test suite.
-
-# Copyright (C) 2019-2022, 2025-2026 Free Software Foundation, Inc.
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-#
-# Written by Akim Demaille.
-
-# usage:
-#
-#    update-test _build/8d/tests/testsuite.dir/*/testsuite.log
-#
-# from your source tree.
-import argparse
-import os
-import re
-
-
-def getargs():
-    p = argparse.ArgumentParser(description='Update test cases.')
-    opt = p.add_argument
-    opt('logs', metavar='log', nargs='+', type=str, default=None,
-        help='log files to process')
-    opt('-v', '--verbose', action='store_true',
-        help='Be verbose')
-    return p.parse_args()
-
-args = getargs()
-subst = dict()
-
-
-def trace(*args_):
-    if args.verbose:
-        print(*args_)
-
-
-def contents(file):
-    '''The contents of a file.'''
-    trace(file)
-    f = open(file)
-    return f.read()
-
-
-def diff_to_re(match):
-    '''Convert a portion of patch into a regex substitution to perform.
-    No longer used, we now use the expected/effective parts.
-    '''
-    frm = []
-    to = []
-    is_diff = False
-    for l in match.group(1).splitlines():
-        print(l)
-        # t in [-+ ]
-        t = l[0]
-        l = l[1:]
-        if t in ['-', ' ']:
-            is_diff = True
-            frm.append(l)
-        if t in ['+', ' ']:
-            is_diff = True
-            to.append(l)
-    if is_diff:
-        # Do not run s//SOMETHING/g (with an emty pattern), that won't
-        # work well...
-        if frm == []:
-            trace("no from for", match.group(1))
-            return
-        frm = "\n".join(frm)
-        to = "\n".join(to)
-        subst[frm] = to
-
-
-def update(at_file, logfile):
-    test = contents(at_file)
-    if os.path.isfile(logfile):
-        trace("LOG: ", logfile)
-        l = contents(logfile)
-        trace("LOG: ", l)
-        global subst
-        subst = {}
-        re.sub(r'(?:^@@.*\n)((?:^[-+ ].*\n)+)',
-               diff_to_re, l, flags = re.MULTILINE)
-        print(subst)
-        if subst:
-            # Turn "subst{frm} -> to" into a large RE.
-            frm = '|'.join([re.escape(x) for x in subst])
-            trace("FROM:", frm)
-            test = re.sub("(" + frm + ")",
-                          lambda m: subst[m.group(1)],
-                          test, flags=re.MULTILINE)
-    open(at_file, 'w').write(test)
-
-
-def process(logfile):
-    log = contents(logfile)
-    # Look for the file to update.
-    m = re.search(r'^\d+\. ([\-\+\w]+\.at):\d+: ', log, re.MULTILINE)
-    if not m:
-        trace("no diff found:", logfile)
-        return
-    at_file = 'tests/' + m.group(1)
-    print(at_file)
-    update(at_file, logfile)
-
-for logfile in args.logs:
-    trace("FILE:", logfile)
-    if os.path.isdir(logfile):
-        logfile = os.path.join(logfile, 'testsuite.log')
-    process(logfile)

cfg.mk

@@ -1,179 +1,48 @@
-## Customize maint.mk                           -*- makefile -*-
-## Copyright (C) 2008-2015, 2018-2022, 2025-2026 Free Software
-## Foundation, Inc.
+# Customize maint.mk                           -*- makefile -*-
+# Copyright (C) 2008-2010 Free Software Foundation, Inc.
 
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 3 of the License, or
-## (at your option) any later version.
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
 
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
 
-## You should have received a copy of the GNU General Public License
-## along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-# Update version, then recompile so that tests/bison --version be
-# up-to-date, then compile our parser again with our up-to-date bison.
-.PHONY: regen
-regen: _version
-	$(MAKE) $(AM_MAKEFLAGS)
-	touch $(srcdir)/src/parse-gram.y
-	$(MAKE) $(AM_MAKEFLAGS)
-
-# Used in maint.mk's web-manual rule
-manual_title = The Yacc-compatible Parser Generator
-gendocs_options_ = -I $(abs_top_srcdir)/doc -I $(abs_top_builddir)/doc
-
-# By default, propagate -j from make to Bison's test suite.
-TESTSUITEFLAGS = $(filter -j%,$(MAKEFLAGS))
-
-# It's useful to run maintainer-check* targets during development, but we
+# It's useful to run maintainer-*check* targets during development, but we
 # don't want to wait on a recompile because of an update to $(VERSION).  Thus,
-# override the _is-dist-target from GNUmakefile so that maintainer-check*
+# override the _is-dist-target from GNUmakefile so that maintainer-*check*
 # targets are filtered out.
-_is-dist-target = $(filter-out %clean maintainer-check%, \
+_is-dist-target = $(filter-out %clean maintainer-check% maintainer-%-check, \
   $(filter maintainer-% dist% alpha beta major,$(MAKECMDGOALS)))
 
+# Use alpha.gnu.org for alpha and beta releases.
+# Use ftp.gnu.org for major releases.
+gnu_ftp_host-alpha = alpha.gnu.org
+gnu_ftp_host-beta = alpha.gnu.org
+gnu_ftp_host-major = ftp.gnu.org
+gnu_rel_host = $(gnu_ftp_host-$(RELEASE_TYPE))
+
 url_dir_list = \
-  https://$(gnu_rel_host)/gnu/bison
+  ftp://$(gnu_rel_host)/gnu/bison
 
 # Tests not to run as part of "make distcheck".
-local-checks-to-skip =			\
-  sc_immutable_NEWS			\
-  sc_indent
+# Exclude changelog-check here so that there's less churn in ChangeLog
+# files -- otherwise, you'd need to have the upcoming version number
+# at the top of the file for each `make distcheck' run.
+local-checks-to-skip = changelog-check
 
 # The local directory containing the checked-out copy of gnulib used in
 # this release.  Used solely to get a date for the "announcement" target.
 gnulib_dir = $(srcdir)/gnulib
 
-bootstrap-tools = autoconf,automake,flex,gettext,gnulib
-
-announcement_Cc_ = \
-  [email protected], [email protected], \
-  [email protected]
+bootstrap-tools = autoconf,automake,flex,gnulib
 
 update-copyright: update-b4-copyright update-package-copyright-year
 update-copyright-env = \
   UPDATE_COPYRIGHT_FORCE=1 UPDATE_COPYRIGHT_USE_INTERVALS=1
-
-
-## -------------------- ##
-## More syntax-checks.  ##
-## -------------------- ##
-
-# Indent only with spaces.
-# Taken from Coreutils.
-sc_prohibit_tab_based_indentation:
-	@prohibit='^ *	'						\
-	halt='TAB in indentation; use only spaces'			\
-	  $(_sc_search_regexp)
-
-# Prohibit the use of `...` in tests/.  Use $(...) instead.
-# Taken from Coreutils.
-# Not ready for Bison yet.
-#sc_prohibit_test_backticks:
-#	@prohibit='`' in_vc_files='^tests/'		\
-#	halt='use $$(...), not `...` in tests/'		\
-#	  $(_sc_search_regexp)
-
-# Enforce recommended preprocessor indentation style.
-# Taken from Coreutils.
-sc_preprocessor_indentation:
-	@if cppi --version >/dev/null 2>&1; then			\
-	  $(VC_LIST_EXCEPT) | grep '\.[ch]$$' | xargs cppi -a -c	\
-	    || { echo '$(ME): incorrect preprocessor indentation' 1>&2;	\
-		exit 1; };						\
-	else								\
-	  echo '$(ME): skipping test $@: cppi not installed' 1>&2;	\
-	fi
-
-###########################################################
-# Taken from Coreutils.
-_p0 = \([^"'/]\|"\([^\"]\|[\].\)*"\|'\([^\']\|[\].\)*'
-_pre = $(_p0)\|[/][^"'/*]\|[/]"\([^\"]\|[\].\)*"\|[/]'\([^\']\|[\].\)*'\)*
-_pre_anchored = ^\($(_pre)\)
-_comment_and_close = [^*]\|[*][^/*]\)*[*][*]*/
-# help font-lock mode: '
-
-# A sed expression that removes ANSI C and ISO C99 comments.
-# Derived from the one in GNU gettext's 'moopp' preprocessor.
-_sed_remove_comments =					\
-/[/][/*]/{						\
-  ta;							\
-  :a;							\
-  s,$(_pre_anchored)//.*,\1,;				\
-  te;							\
-  s,$(_pre_anchored)/[*]\($(_comment_and_close),\1 ,;	\
-  ta;							\
-  /^$(_pre)[/][*]/{					\
-    s,$(_pre_anchored)/[*].*,\1 ,;			\
-    tu;							\
-    :u;							\
-    n;							\
-    s,^\($(_comment_and_close),,;			\
-    tv;							\
-    s,^.*$$,,;						\
-    bu;							\
-    :v;							\
-  };							\
-  :e;							\
-}
-# Quote all single quotes.
-_sed_rm_comments_q = $(subst ','\'',$(_sed_remove_comments))
-# help font-lock mode: '
-
-_space_before_paren_exempt =? \\n\\$$
-_space_before_paren_exempt = \
-  (^ *\#|(LA)?LR\([01]\)|percent_(code|define)|b4_syncline|m4_(define|init))
-# Ensure that there is a space before each open parenthesis in C code.
-sc_space_before_open_paren:
-	@if $(VC_LIST_EXCEPT) | grep -l '\.[ch]$$' > /dev/null; then	\
-	  fail=0;							\
-	  for c in $$($(VC_LIST_EXCEPT) | grep '\.[ch]$$'); do		\
-	    sed '$(_sed_rm_comments_q)' $$c 2>/dev/null			\
-	      | grep -i '[[:alnum:]]('					\
-	      | grep -vE '$(_space_before_paren_exempt)'		\
-	      | grep . && { fail=1; echo "*** $$c"; };			\
-	  done;								\
-	  test $$fail = 1 &&						\
-	    { echo '$(ME): the above files lack a space-before-open-paren' \
-		1>&2; exit 1; } || :;					\
-	else :;								\
-	fi
-
-## -------------------------- ##
-## syntax-checks exceptions.  ##
-## -------------------------- ##
-
-# po-check: we use gnulib-po, so we don't need/want them in our POTFILE.
-generated_files =
-
-exclude = \
-  $(foreach a,$(1),$(eval $(subst $$,$$$$,exclude_file_name_regexp--sc_$(a))))
-
-$(call exclude,                                                                 \
-  bindtextdomain=^lib/main.c$$                                                  \
-  cast_of_argument_to_free=^src/muscle-tab.c$$                                  \
-  error_message_uppercase=etc/bench.pl.in$$                                     \
-  file_system=^doc/Doxyfile.in$$                                                \
-  po_check=^tests|(^po/POTFILES.in|.md)$$                                       \
-  preprocessor_indentation=^data/|^lib/|^src/parse-gram.[ch]$$                  \
-  program_name=^lib/main.c$$                                                    \
-  prohibit_always-defined_macros=^data/skeletons/yacc.c$$                       \
-  prohibit_always-defined_macros+=?|^src/(parse-gram.c|system.h)$$              \
-  prohibit_always-defined_macros+=?|^tests/regression.at$$                      \
-  prohibit_atoi_atof=^(doc|etc|examples|tests)/                                 \
-  prohibit_doubled_word=^tests/named-refs.at$$                                  \
-  prohibit_magic_number_exit=^doc/bison.texi$$                                  \
-  prohibit_magic_number_exit+=?|^tests/(conflicts|regression).at$$              \
-  prohibit_strcmp=^doc/bison\.texi|examples|tests                               \
-  prohibit_tab_based_indentation=install-icc.sh|\.(am|mk)$$|^\.git|tests/input.at|Makefile$$   \
-  require_config_h=^(lib/yyerror|data/skeletons/(glr|yacc))\.c$$                \
-  require_config_h_first=^(lib/yyerror|data/skeletons/(glr|yacc))\.c$$          \
-  space_before_open_paren=^data/skeletons/                                      \
-  two_space_separator_in_usage=^(bootstrap|build-aux/install-icc.sh)            \
-  unmarked_diagnostics=^(doc/bison.texi$$|tests/c\+\+\.at$$)                    \
-)

config.hin

@@ -0,0 +1,292 @@
+/* config.hin.  Generated from configure.in by autoheader.  */
+
+/* Define to one of `_getb67', `GETB67', `getb67' for Cray-2 and Cray-YMP
+   systems. This function is required for `alloca.c' support on those systems.
+   */
+#undef CRAY_STACKSEG_END
+
+/* Define if using `alloca.c'. */
+#undef C_ALLOCA
+
+/* Define to 1 if translation of program messages to the user's native
+   language is requested. */
+#undef ENABLE_NLS
+
+/* Define if you have `alloca', as a function or macro. */
+#undef HAVE_ALLOCA
+
+/* Define if you have <alloca.h> and it should be used (not on Ultrix). */
+#undef HAVE_ALLOCA_H
+
+/* Define if you have the <argz.h> header file. */
+#undef HAVE_ARGZ_H
+
+/* Define if you have the <ctype.h> header file. */
+#undef HAVE_CTYPE_H
+
+/* Define if backslash-a works in C strings. */
+#undef HAVE_C_BACKSLASH_A
+
+/* Define if you have the `dcgettext' function. */
+#undef HAVE_DCGETTEXT
+
+/* Define to 1 if you have the declaration of `memchr', and to 0 if you don't.
+   */
+#undef HAVE_DECL_MEMCHR
+
+/* Define to 1 if you have the declaration of `stpcpy', and to 0 if you don't.
+   */
+#undef HAVE_DECL_STPCPY
+
+/* Define to 1 if you have the declaration of `strerror_r', and to 0 if you
+   don't. */
+#undef HAVE_DECL_STRERROR_R
+
+/* Define to 1 if you have the declaration of `strndup', and to 0 if you
+   don't. */
+#undef HAVE_DECL_STRNDUP
+
+/* Define to 1 if you have the declaration of `strnlen', and to 0 if you
+   don't. */
+#undef HAVE_DECL_STRNLEN
+
+/* Define if the malloc check has been performed. */
+#undef HAVE_DONE_WORKING_MALLOC_CHECK
+
+/* Define if the realloc check has been performed. */
+#undef HAVE_DONE_WORKING_REALLOC_CHECK
+
+/* Define if you have the `doprnt' function. */
+#undef HAVE_DOPRNT
+
+/* Define if you have the `feof_unlocked' function. */
+#undef HAVE_FEOF_UNLOCKED
+
+/* Define if you have the `fgets_unlocked' function. */
+#undef HAVE_FGETS_UNLOCKED
+
+/* Define if you have the `getcwd' function. */
+#undef HAVE_GETCWD
+
+/* Define if you have the `getegid' function. */
+#undef HAVE_GETEGID
+
+/* Define if you have the `geteuid' function. */
+#undef HAVE_GETEUID
+
+/* Define if you have the `getgid' function. */
+#undef HAVE_GETGID
+
+/* Define if you have the `getpagesize' function. */
+#undef HAVE_GETPAGESIZE
+
+/* Define if the GNU gettext() function is already present or preinstalled. */
+#undef HAVE_GETTEXT
+
+/* Define if you have the `getuid' function. */
+#undef HAVE_GETUID
+
+/* Define if you have the iconv() function. */
+#undef HAVE_ICONV
+
+/* Define if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define if you have the `isascii' function. */
+#undef HAVE_ISASCII
+
+/* Define if you have the `iswprint' function. */
+#undef HAVE_ISWPRINT
+
+/* Define if you have <langinfo.h> and nl_langinfo(CODESET). */
+#undef HAVE_LANGINFO_CODESET
+
+/* Define if your <locale.h> file defines LC_MESSAGES. */
+#undef HAVE_LC_MESSAGES
+
+/* Define if you have the <limits.h> header file. */
+#undef HAVE_LIMITS_H
+
+/* Define if you have the <locale.h> header file. */
+#undef HAVE_LOCALE_H
+
+/* Define if you have the <malloc.h> header file. */
+#undef HAVE_MALLOC_H
+
+/* Define to 1 if mbrtowc and mbstate_t are properly declared. */
+#undef HAVE_MBRTOWC
+
+/* Define if you have the `mbsinit' function. */
+#undef HAVE_MBSINIT
+
+/* Define if you have the `memchr' function. */
+#undef HAVE_MEMCHR
+
+/* Define if you have the <memory.h> header file. */
+#undef HAVE_MEMORY_H
+
+/* Define if you have the `mempcpy' function. */
+#undef HAVE_MEMPCPY
+
+/* Define if you have the `mkstemp' function. */
+#undef HAVE_MKSTEMP
+
+/* Define if you have a working `mmap' system call. */
+#undef HAVE_MMAP
+
+/* Define if you have the `munmap' function. */
+#undef HAVE_MUNMAP
+
+/* Define if you have the <nl_types.h> header file. */
+#undef HAVE_NL_TYPES_H
+
+/* Define if you have the `putenv' function. */
+#undef HAVE_PUTENV
+
+/* Define if you have the `setenv' function. */
+#undef HAVE_SETENV
+
+/* Define if you have the `setlocale' function. */
+#undef HAVE_SETLOCALE
+
+/* Define if you have the <stddef.h> header file. */
+#undef HAVE_STDDEF_H
+
+/* Define if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define if you have the `stpcpy' function. */
+#undef HAVE_STPCPY
+
+/* Define if you have the `strcasecmp' function. */
+#undef HAVE_STRCASECMP
+
+/* Define if you have the `strchr' function. */
+#undef HAVE_STRCHR
+
+/* Define if you have the `strdup' function. */
+#undef HAVE_STRDUP
+
+/* Define if you have the `strerror' function. */
+#undef HAVE_STRERROR
+
+/* Define if you have the `strerror_r' function. */
+#undef HAVE_STRERROR_R
+
+/* Define if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define if you have the `strndup' function. */
+#undef HAVE_STRNDUP
+
+/* Define if you have the `strnlen' function. */
+#undef HAVE_STRNLEN
+
+/* Define if you have the `strspn' function. */
+#undef HAVE_STRSPN
+
+/* Define if you have the `strtoul' function. */
+#undef HAVE_STRTOUL
+
+/* Define if you have the <sys/param.h> header file. */
+#undef HAVE_SYS_PARAM_H
+
+/* Define if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define if you have the `tsearch' function. */
+#undef HAVE_TSEARCH
+
+/* Define if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Define if you have the `vprintf' function. */
+#undef HAVE_VPRINTF
+
+/* Define if you have the <wchar.h> header file. */
+#undef HAVE_WCHAR_H
+
+/* Define if you have the <wctype.h> header file. */
+#undef HAVE_WCTYPE_H
+
+/* Define to 1 if `strerror_r' returns a string. */
+#undef HAVE_WORKING_STRERROR_R
+
+/* Define if you have the `__argz_count' function. */
+#undef HAVE___ARGZ_COUNT
+
+/* Define if you have the `__argz_next' function. */
+#undef HAVE___ARGZ_NEXT
+
+/* Define if you have the `__argz_stringify' function. */
+#undef HAVE___ARGZ_STRINGIFY
+
+/* Define as const if the declaration of iconv() needs const. */
+#undef ICONV_CONST
+
+/* Name of package */
+#undef PACKAGE
+
+/* Define if compiler has function prototypes */
+#undef PROTOTYPES
+
+/* If using the C implementation of alloca, define if you know the
+   direction of stack growth for your system; otherwise it will be
+   automatically deduced at run-time.
+        STACK_DIRECTION > 0 => grows toward higher addresses
+        STACK_DIRECTION < 0 => grows toward lower addresses
+        STACK_DIRECTION = 0 => direction of growth unknown */
+#undef STACK_DIRECTION
+
+/* Define if you have the ANSI C header files. */
+#undef STDC_HEADERS
+
+/* Version number of package */
+#undef VERSION
+
+/* Define if using the dmalloc debugging malloc package */
+#undef WITH_DMALLOC
+
+/* Define to 1 for GNU C library extensions. */
+#undef _GNU_SOURCE
+
+/* Define if on MINIX. */
+#undef _MINIX
+
+/* Define if the system does not provide POSIX.1 features except with this
+   defined. */
+#undef _POSIX_1_SOURCE
+
+/* Define if you need to in order for `stat' and other things to work. */
+#undef _POSIX_SOURCE
+
+/* Define to empty if `const' does not conform to ANSI C. */
+#undef const
+
+/* Define as `__inline' if that's what the C compiler calls it, or to nothing
+   if it is not supported. */
+#undef inline
+
+/* Define to rpl_malloc if the replacement function should be used. */
+#undef malloc
+
+/* Define to a type if <wchar.h> does not define. */
+#undef mbstate_t
+
+/* Define to `long' if <sys/types.h> does not define. */
+#undef off_t
+
+/* Define to rpl_realloc if the replacement function should be used. */
+#undef realloc
+
+/* Define to `unsigned' if <sys/types.h> does not define. */
+#undef size_t

configure.ac

@@ -1,7 +1,6 @@
 # Configure template for GNU Bison.                   -*-Autoconf-*-
 #
-# Copyright (C) 2001-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
+# Copyright (C) 2001-2010 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -14,272 +13,99 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-AC_PREREQ([2.71])
-m4_pattern_forbid([^_?(gl_[A-Z]|AX_|BISON_)])
-m4_pattern_allow([^BISON_USE_NLS$])
+# We have strange test case titles, so we need Autoconf 2.61 or better.
+AC_PREREQ(2.61)
 
 AC_INIT([GNU Bison],
         m4_esyscmd([build-aux/git-version-gen .tarball-version]),
-        [[email protected]],
-        [],
-        [https://www.gnu.org/software/bison/])
-AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2026])
-AC_DEFINE_UNQUOTED([PACKAGE_COPYRIGHT_YEAR], [$PACKAGE_COPYRIGHT_YEAR],
-                   [The copyright year for this package])
+        [[email protected]])
+AC_DEFINE([PACKAGE_COPYRIGHT_YEAR], [2010],
+          [The copyright year for this package])
+AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2010])
 
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
 
-# When we move to Automake 1.16, simplify examples/c/reccalc/local.mk.
-# Our CI build the packages on Bionic, which has only Automake 1.15.
+# Automake 1.10.3 and 1.11.1 fix a security flaw discussed here:
 #
-# We want gnits strictness only when rolling a stable release.  For
-# release candidates, we use version strings like 2.4.3_rc1, but gnits
-# doesn't like that, so we let the underscore disable gnits.  Between
-# releases, we want to be able run make dist without being required to
-# add a bogus NEWS entry.  In that case, the version string
-# automatically contains a dash, which we also let disable gnits.
-AM_INIT_AUTOMAKE([1.15 dist-lzip dist-xz nostdinc
-                 color-tests parallel-tests
-                 silent-rules]
-                 m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-_]],
-                           [gnu], [gnits]))
-AM_SILENT_RULES([yes])
-AC_CONFIG_HEADERS([lib/config.h:lib/config.in.h])
+#   http://thread.gmane.org/gmane.comp.sysutils.autotools.announce/131
+#
+# To avoid 1.11, we make 1.11.1 the minimum version.
+#
+# We want gnits strictness only when rolling a formal release so that we can,
+# for example, run make dist at other times without being required to add a
+# bogus NEWS entry.
+AM_INIT_AUTOMAKE([1.11.1 dist-bzip2]
+                 m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [-], [gnu], [gnits]))
+AC_CONFIG_HEADERS([lib/config.h:lib/config.hin])
 
 # Checks for the compiler.
-AC_PROG_CC
-AC_PROG_CXX
+AC_PROG_CC_STDC
 
 # Gnulib (early checks).
 gl_EARLY
 
-# Gnulib uses '#pragma GCC diagnostic push' to silence some
-# warnings, but older gcc doesn't support this.
-AC_CACHE_CHECK([whether pragma GCC diagnostic push works],
-  [lv_cv_gcc_pragma_push_works], [
-  save_CFLAGS=$CFLAGS
-  CFLAGS='-Wunknown-pragmas -Werror'
-  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
-    #pragma GCC diagnostic push
-    #pragma GCC diagnostic pop
-  ]])],
-  [lv_cv_gcc_pragma_push_works=yes],
-  [lv_cv_gcc_pragma_push_works=no])
-  CFLAGS=$save_CFLAGS])
-
-AC_LANG_PUSH([C++])
-gl_WARN_ADD([-fno-exceptions], [NO_EXCEPTIONS_CXXFLAGS])
-BISON_CXXSTD([98])
-BISON_CXXSTD([03])
-BISON_CXXSTD([11])
-BISON_CXXSTD([14])
-BISON_CXXSTD([17])
-BISON_CXXSTD([20])
-BISON_CXXSTD([2b])
-AM_CONDITIONAL([ENABLE_CXX11], [test x"$CXX11_CXXFLAGS" != x])
-AM_CONDITIONAL([ENABLE_CXX14], [test x"$CXX14_CXXFLAGS" != x])
-AC_LANG_POP([C++])
-
-AC_ARG_ENABLE([gcc-warnings],
-[  --enable-gcc-warnings   turn on lots of GCC warnings (not recommended).
-                           Also, issue synclines from the examples/ to
-                           the corresponding source in the Texinfo doc.],
-[case $enable_gcc_warnings in
+AC_ARG_ENABLE(gcc-warnings,
+[  --enable-gcc-warnings   turn on lots of GCC warnings (not recommended)],
+[case "${enableval}" in
    yes|no) ;;
-   *)  AC_MSG_ERROR([invalid value for --gcc-warnings: $enable_gcc_warnings]);;
+   *)      AC_MSG_ERROR([bad value ${enableval} for gcc-warnings option]) ;;
  esac],
-              [enable_gcc_warnings=no])
-AM_CONDITIONAL([ENABLE_GCC_WARNINGS], [test "$enable_gcc_warnings" = yes])
-if test "$enable_gcc_warnings" = yes; then
-  # -Wno-tautological-constant-out-of-range-compare for Clang 3.3 and
-  # 3.4 on GNU/Linux that choke on intprops.h's INT_MULTIPLY_WRAPV,
-  # etc.
-  #
-  # ICC: -wr188
-  #
-  # 1669  warnings warnings_default =
-  # ../src/complain.c(318): error #188: enumerated type mixed with another type
-  # 1670      Wconflicts_sr | Wconflicts_rr | Wdeprecated | Wother;
-  # 1671      ^
-  # 1672
-  # 1673../src/complain.c(393): error #188: enumerated type mixed with another type
-  # 1674          warnings w = 1 << wbit;
-  # 1675                       ^
-  #
-  # ICC: -wr3179
-  #
-  # char const *usefulness
-  #   = rule_useless_in_grammar_p (&rules[r]) ? "useless-in-grammar"
-  #   : rule_useless_in_parser_p (&rules[r])  ? "useless-in-parser"
-  #   :                                         "useful";
-  #
-  # gives
-  #
-  # error #3179: deprecated conversion of string literal to char* (should be const char*)
-  #
-  # ICC: -wr2259 (that's in C, in spite of what the error messages which seems to be about C++).
-  # error #2259: non-pointer conversion from "int" to "yybool={signed char}" may lose significant bits
-  #   yybool yynormal YY_ATTRIBUTE_UNUSED = yystackp->yysplitPoint == YY_NULLPTR;
-  #                                         ^
-  warn_common='-Wall -Wextra
-    -Wcast-align -Wchar-subscripts
-    -fparse-all-comments -Wdocumentation
-    -Wformat -Wimplicit-fallthrough -Wmismatched-dealloc -Wnull-dereference
-    -Wno-sign-compare -Wno-tautological-constant-out-of-range-compare
-    -Wpointer-arith -Wshadow -Wstrict-aliasing
-    -Wunused-but-set-variable
-    -Wwrite-strings
-    -wr188 -wr2259 -wr3179'
-  warn_c='-Wbad-function-cast
-    -Wmissing-prototypes
-    -Wstrict-prototypes'
-  warn_cxx='-Wextra-semi -Wnoexcept -Wsubobject-linkage
-    -Wold-style-cast -Wundefined-func-template
-    -Wweak-vtables'
-  # Warnings for the test suite only.
-  #
-  # -fno-color-diagnostics: Clang's use of colors in the error
-  # messages is confusing the tests looking at the compiler's output
-  # (e.g., synclines.at).
-  #
-  # -Wno-keyword-macro: We use the "#define private public" dirty
-  # trick in the test suite to check some private implementation
-  # details for lalr1.cc.
-  warn_tests='-Wundef -pedantic -Wconversion
-    -Wdeprecated -Wsign-compare -Wsign-conversion
-    -Wtautological-constant-out-of-range-compare
-    -fno-color-diagnostics
-    -Wno-keyword-macro'
-
-
-  AC_LANG_PUSH([C])
-  # Clang supports many of GCC's -W options, but only issues warnings
-  # on the ones it does not recognize.  In that case, gl_WARN_ADD
-  # thinks the option is supported, and unknown options are then added
-  # to CFLAGS.  But then, when -Werror is added in the test suite for
-  # instance, the warning about the unknown option turns into an
-  # error.
-  #
-  # This should be addressed by gnulib's gl_WARN_ADD, but in the
-  # meanwhile, turn warnings about unknown options into errors in
-  # CFLAGS, and restore CFLAGS after the tests.
-  save_CFLAGS=$CFLAGS
-  gl_WARN_ADD([-Werror=unknown-warning-option], [CFLAGS])
-  # Accept this warning only if it is not too touchy (e.g., clang 3.3
-  # and 3.4).
-  gl_WARN_ADD([-Wunreachable-code], [WARN_CFLAGS],
-              [AC_LANG_PROGRAM([],
-              [[if (sizeof (long) < sizeof (int)) return 1;]])])
-  for i in $warn_common $warn_c;
-  do
-    gl_WARN_ADD([$i], [WARN_CFLAGS])
-  done
+	      [enableval=no])
+if test "${enableval}" = yes; then
   gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
-
-  # Warnings for the test suite, and maybe for bison if GCC is modern
-  # enough.
-  test $lv_cv_gcc_pragma_push_works = yes &&
-    AS_VAR_APPEND([WARN_CFLAGS], [" $WARN_CFLAGS_TEST"])
-
+  AC_SUBST([WERROR_CFLAGS])
+  gl_WARN_ADD([-Wall])
+  gl_WARN_ADD([-Wextra -Wno-sign-compare])
+  gl_WARN_ADD([-Wcast-align])
+  gl_WARN_ADD([-Wcast-qual])
+  gl_WARN_ADD([-Wformat])
+  gl_WARN_ADD([-Wpointer-arith])
+  gl_WARN_ADD([-Wwrite-strings])
+  AC_SUBST([WARN_CXXFLAGS], [$WARN_CFLAGS])
+  # The following warnings are not suitable for C++.
+  gl_WARN_ADD([-Wbad-function-cast])
+  gl_WARN_ADD([-Wmissing-declarations])
+  gl_WARN_ADD([-Wmissing-prototypes])
+  gl_WARN_ADD([-Wshadow])
+  gl_WARN_ADD([-Wstrict-prototypes])
+  AC_SUBST([WARN_CFLAGS])
   # Warnings for the test suite only.
-  for i in $warn_tests -Wincompatible-pointer-types;
-  do
-    gl_WARN_ADD([$i], [WARN_CFLAGS_TEST])
-  done
-  CFLAGS=$save_CFLAGS
-  AC_LANG_POP([C])
-
-
-  AC_LANG_PUSH([C++])
-  save_CXXFLAGS=$CXXFLAGS
-  gl_WARN_ADD([-Werror=unknown-warning-option], [CXXFLAGS])
-  for i in $warn_common $warn_cxx;
-  do
-    gl_WARN_ADD([$i], [WARN_CXXFLAGS])
-  done
-  # Accept this warning only if it is not too touchy (e.g., clang 3.3
-  # and 3.4).
-  gl_WARN_ADD([-Wunreachable-code], [WARN_CXXFLAGS],
-              [AC_LANG_PROGRAM([],
-              [[if (sizeof (long) < sizeof (int)) return 1;]])])
-  gl_WARN_ADD([-Wzero-as-null-pointer-constant], [WARN_CXXFLAGS],
-              [AC_LANG_PROGRAM([], [nullptr])])
-  # Before GCC6, the pragmas don't work well enough to neutralize
-  # this warning.
-  gl_WARN_ADD([-Wuseless-cast], [WARN_CXXFLAGS],
-              [AC_LANG_PROGRAM([], [
-              #if defined __GNUC__ && ! defined __ICC && ! defined __clang__ && __GNUC__ < 6
-              syntax error
-              #endif
-              ])])
-  gl_WARN_ADD([-Werror], [WERROR_CXXFLAGS])
-  # Warnings for the test suite only.
-  for i in $warn_tests;
-  do
-    gl_WARN_ADD([$i], [WARN_CXXFLAGS_TEST])
-  done
-  # Too many compilers complain about Flex generated code.
-  gl_WARN_ADD([-Wno-error], [FLEX_SCANNER_CXXFLAGS])
-  # Clang++ deprecates compiling C.
-  gl_WARN_ADD([-Wno-deprecated], [WNO_DEPRECATED_CXXFLAGS])
-  CXXFLAGS=$save_CXXFLAGS
-  AC_LANG_POP([C++])
-
-  AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.])
-  AH_VERBATIM([FORTIFY_SOURCE],
-    [/* Enable compile-time and run-time bounds-checking, and some warnings,
-        without upsetting glibc 2.15+. */
-     #if !defined _FORTIFY_SOURCE && defined __OPTIMIZE__ && __OPTIMIZE__
-     # define _FORTIFY_SOURCE 2
-     #endif
-    ])
-  AC_DEFINE([GNULIB_PORTCHECK], [1], [Enable some gnulib portability checks.])
+  gl_WARN_ADD([-Wundef], [WARN_CFLAGS_TEST])
+  WARN_CXXFLAGS_TEST="$WARN_CXXFLAGS $WARN_CFLAGS_TEST"
+  WARN_CFLAGS_TEST="$WARN_CFLAGS $WARN_CFLAGS_TEST"
+  AC_SUBST([WARN_CXXFLAGS_TEST])
+  AC_SUBST([WARN_CFLAGS_TEST])
+  AC_DEFINE([lint], 1, [Define to 1 if the compiler is checking for lint.])
 fi
 
-
 BISON_TEST_FOR_WORKING_C_COMPILER
-BISON_C_COMPILER_POSIXLY_CORRECT
-BISON_TEST_FOR_WORKING_CXX_COMPILER
-BISON_CXX_COMPILER_POSIXLY_CORRECT
-
-# D.
-AC_CHECK_PROGS([DC], [dmd])
-AC_CHECK_PROGS([DCFLAGS], [-g])
-AM_CONDITIONAL([ENABLE_D], [test x"$DC" != x])
-
-# Java.
-gt_JAVACOMP([1.7], [1.7])
-gt_JAVAEXEC
-AM_CONDITIONAL([ENABLE_JAVA], [test x"$CONF_JAVAC" != x && test x"$CONF_JAVA" != x])
-
 
 AC_ARG_ENABLE([yacc],
-  [AS_HELP_STRING([--disable-yacc],
+  [AC_HELP_STRING([--disable-yacc],
      [do not build a yacc command or an -ly library])],
   , [enable_yacc=yes])
-AM_CONDITIONAL([ENABLE_YACC], [test "$enable_yacc" = yes])
-AC_CONFIG_FILES([src/yacc], [chmod +x src/yacc])
+case $enable_yacc in
+yes)
+  YACC_SCRIPT=yacc
+  YACC_LIBRARY=liby.a;;
+*)
+  YACC_SCRIPT=
+  YACC_LIBRARY=;;
+esac
+AC_SUBST([YACC_SCRIPT])
+AC_SUBST([YACC_LIBRARY])
 
 # Checks for programs.
-AM_MISSING_PROG([DOT], [dot])
 AC_PROG_LEX
-if ! "$LEX_IS_FLEX" || test "X$LEX" = X:; then
-  AC_MSG_WARN([bypassing lex because flex is required])
-  LEX=:
-fi
-AM_CONDITIONAL([FLEX_WORKS], [$LEX_IS_FLEX && $FLEX_SUPPORTS_HEADER_OPT])
-AM_CONDITIONAL([FLEX_CXX_WORKS],
-  [$LEX_IS_FLEX && $FLEX_SUPPORTS_HEADER_OPT && test $bison_cv_cxx_works = yes])
 AC_PROG_YACC
 AC_PROG_RANLIB
 AC_PROG_GNU_M4
 AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.])
 AC_DEFINE_UNQUOTED([M4_GNU_OPTION], ["$M4_GNU"], [Define to "-g" if GNU M4
 supports -g, otherwise to "".])
-AC_PATH_PROG([PERL], [perl])
 AM_MISSING_PROG([HELP2MAN], [help2man])
 AC_PATH_PROG([XSLTPROC], [xsltproc])
 AC_SUBST([XSLTPROC])
@@ -294,19 +120,17 @@ AC_C_INLINE
 # gl_EARLY avoids some redundant checks.
 gl_INIT
 
-# We want ostream_printf and hyperlink support.
-gl_LIBTEXTSTYLE_OPTIONAL([0.20.5])
-
 # Checks for library functions.
 AC_CHECK_FUNCS_ONCE([setlocale])
+AM_WITH_DMALLOC
+BISON_PREREQ_SUBPIPE
+BISON_PREREQ_TIMEVAR
 
 # Gettext.
-# We use gnulib, which is only guaranteed to work properly with the
-# latest Gettext.
+# We've never tested with gettext versions before 0.15, so play it safe.
 AM_GNU_GETTEXT([external], [need-ngettext])
-AM_GNU_GETTEXT_VERSION([0.19])
+AM_GNU_GETTEXT_VERSION([0.15])
 BISON_I18N
-AC_CONFIG_FILES([gnulib-po/Makefile.in])
 
 # Internationalized parsers.
 AC_CONFIG_FILES([runtime-po/Makefile.in])
@@ -319,54 +143,28 @@ AC_CONFIG_FILES([etc/bench.pl], [chmod +x etc/bench.pl])
 
 # Initialize the test suite.
 AC_CONFIG_TESTDIR(tests)
-AC_CONFIG_FILES([tests/atlocal])
+AC_CONFIG_FILES([tests/Makefile tests/atlocal])
 AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison])
-
 AC_CHECK_PROGS([VALGRIND], [valgrind])
-# Use something simpler that $host_os to select our suppression file.
-uname=`uname`
-case $VALGRIND:$uname in
-  '':*) ;;
-  *:Darwin)
-    # See README-hacking.md.
-    VALGRIND=;;
-  *:*)
-    suppfile=build-aux/$uname.valgrind
-    if test -f "$srcdir/$suppfile"; then
-      AC_SUBST([VALGRIND_OPTS_SUPPRESSION],
-               ["--suppressions=\$(abs_top_srcdir)/$suppfile"])
-    fi
-    ;;
-esac
-AC_MSG_CHECKING([Valgrind suppression file])
-AC_MSG_RESULT([$suppfile])
-
-# Whether we cannot run the compiled bison.
-AM_CONDITIONAL([CROSS_COMPILING], [test "$cross_compiling" = yes])
-
-# Build bistromathic if we have the lib and both readline/readline.h
-# and readline/history.h.
-AM_CONDITIONAL([ENABLE_BISTROMATHIC],
-[test "$gl_cv_lib_readline" != no &&
-  test "$ac_cv_header_readline_readline_h" = yes &&
-  test "$ac_cv_header_readline_history_h" = yes])
-
+AC_PROG_CXX
+BISON_TEST_FOR_WORKING_CXX_COMPILER
 AM_MISSING_PROG([AUTOM4TE], [autom4te])
 # Needed by tests/atlocal.in.
 AC_SUBST([GCC])
+AC_SUBST([O0CFLAGS],   [`echo $CFLAGS   | sed 's/-O[[0-9]] *//'`])
+AC_SUBST([O0CXXFLAGS], [`echo $CXXFLAGS | sed 's/-O[[0-9]] *//'`])
+
+gt_JAVACOMP([1.3])
+gt_JAVAEXEC
 
 AC_CONFIG_FILES([Makefile
-                 po/Makefile.in
-                 doc/yacc.1])
-
-# Fix LIBOBJS to give the Makefile the right file names.  Otherwise
-# compilation works, but with unexpected file names, so clean rules don't
-# remove the actual files and distcheck fails.
-AC_CONFIG_COMMANDS_PRE([
-  case $am__api_version in
-    1.14*|1.15*) gl_LIBOBJS=`echo "$gl_LIBOBJS" | sed -e 's, lib/, lib/lib_libbison_a-,g'`;;
-    *)           gl_LIBOBJS=`echo "$gl_LIBOBJS" | sed -e 's, lib/, lib/libbison_a-,g'`;;
-  esac
-])
-
+		 build-aux/Makefile
+		 po/Makefile.in
+		 data/Makefile
+		 etc/Makefile
+		 examples/Makefile
+		    examples/calc++/Makefile
+		 lib/Makefile src/Makefile
+		 doc/Makefile
+		   doc/yacc.1])
 AC_OUTPUT

data/.cvsignore

@@ -0,0 +1,2 @@
+Makefile.in
+Makefile

data/.gitignore

@@ -0,0 +1,2 @@
+/Makefile.in
+/Makefile

data/Makefile.am

@@ -1,7 +1,5 @@
-#! /bin/sh
+## Copyright (C) 2002, 2005-2010 Free Software Foundation, Inc.
 
-# Copyright (C) 2018-2022, 2025-2026 Free Software Foundation, Inc.
-#
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
@@ -13,34 +11,19 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-cat >input <<EOF
-1+2*3
-EOF
-run 0 7
+dist_pkgdata_DATA = README bison.m4 \
+   c-skel.m4 c.m4 yacc.c glr.c \
+   c++-skel.m4 c++.m4 location.cc lalr1.cc glr.cc \
+   java-skel.m4 java.m4 lalr1.java
 
-cat >input <<EOF
-1
-2
-3
-EOF
-run 0 '1
-2
-3'
+m4sugardir = $(pkgdatadir)/m4sugar
+dist_m4sugar_DATA = m4sugar/m4sugar.m4 m4sugar/foreach.m4
 
-cat >input <<EOF
-(1+2) * 3
-EOF
-run 0 9
-run -noerr 0 9 -p
-
-cat >input <<EOF
-(1+2) *
-EOF
-run 1 'err: 1.8-2.0: syntax error, unexpected end of line, expecting ( or number'
-
-cat >input <<EOF
-1 / (2 - 2)
-EOF
-run 1 'err: 1.1-11: error: division by zero'
+xsltdir = $(pkgdatadir)/xslt
+dist_xslt_DATA =				\
+   xslt/bison.xsl				\
+   xslt/xml2dot.xsl				\
+   xslt/xml2text.xsl				\
+   xslt/xml2xhtml.xsl

data/README

@@ -0,0 +1,70 @@
+-*- outline -*-
+
+This directory contains data needed by Bison.
+
+* Skeletons
+Bison skeletons: the general shapes of the different parser kinds,
+that are specialized for specific grammars by the bison program.
+
+Currently, the supported skeletons are:
+
+- yacc.c
+  It used to be named bison.simple: it corresponds to C Yacc
+  compatible LALR(1) parsers.
+
+- lalr1.cc
+  Produces a C++ parser class.
+
+- lalr1.java
+  Produces a Java parser class.
+
+- glr.c
+  A Generalized LR C parser based on Bison's LALR(1) tables.
+
+- glr.cc
+  A Generalized LR C++ parser.  Actually a C++ wrapper around glr.c.
+
+These skeletons are the only ones supported by the Bison team.
+Because the interface between skeletons and the bison program is not
+finished, *we are not bound to it*.  In particular, Bison is not
+mature enough for us to consider that ``foreign skeletons'' are
+supported.
+
+* m4sugar
+This directory contains M4sugar, sort of an extended library for M4,
+which is used by Bison to instantiate the skeletons.
+
+* xslt
+This directory contains XSLT programs that transform Bison's XML output
+into various formats.
+
+- bison.xsl
+  A library of routines used by the other XSLT programs.
+
+- xml2dot.xsl
+  Conversion into GraphViz's dot format.
+
+- xml2text.xsl
+  Conversion into text.
+
+- xml2xhtml.xsl
+  Conversion into XHTML.
+
+-----
+
+Copyright (C) 2002, 2008-2010 Free Software Foundation, Inc.
+
+This file is part of GNU Bison.
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.

data/README.md

@@ -1,228 +0,0 @@
-This directory contains data needed by Bison.
-
-# Directory Content
-## Skeletons
-Bison skeletons: the general shapes of the different parser kinds, that are
-specialized for specific grammars by the bison program.
-
-Currently, the supported skeletons are:
-
-- yacc.c
-  It used to be named bison.simple: it corresponds to C Yacc
-  compatible LALR(1) parsers.
-
-- lalr1.cc
-  Produces a C++ parser class.
-
-- lalr1.java
-  Produces a Java parser class.
-
-- glr.c
-  A Generalized LR C parser based on Bison's LALR(1) tables.
-
-- glr.cc
-  A Generalized LR C++ parser.  Actually a C++ wrapper around glr.c.
-
-These skeletons are the only ones supported by the Bison team.  Because the
-interface between skeletons and the bison program is not finished, *we are
-not bound to it*.  In particular, Bison is not mature enough for us to
-consider that "foreign skeletons" are supported.
-
-## m4sugar
-This directory contains M4sugar, sort of an extended library for M4, which
-is used by Bison to instantiate the skeletons.
-
-## xslt
-This directory contains XSLT programs that transform Bison's XML output into
-various formats.
-
-- bison.xsl
-  A library of routines used by the other XSLT programs.
-
-- xml2dot.xsl
-  Conversion into GraphViz's dot format.
-
-- xml2text.xsl
-  Conversion into text.
-
-- xml2xhtml.xsl
-  Conversion into XHTML.
-
-# Implementation Notes About the Skeletons
-
-"Skeleton" in Bison parlance means "backend": a skeleton is fed by the bison
-executable with LR tables, facts about the symbols, etc. and they generate
-the output (say parser.cc, parser.hh, location.hh, etc.).  They are only in
-charge of generating the parser and its auxiliary files, they do not
-generate the XML output, the parser.output reports, nor the graphical
-rendering.
-
-The bits of information passing from bison to the backend is named
-"muscles".  Muscles are passed to M4 via its standard input: it's a set of
-m4 definitions.  To see them, use `--trace=muscles`.
-
-Except for muscles, whose names are generated by bison, the skeletons have
-no constraint at all on the macro names: there is no technical/theoretical
-limitation, as long as you generate the output, you can do what you want.
-However, of course, that would be a bad idea if, say, the C and C++
-skeletons used different approaches and had completely different
-implementations.  That would be a maintenance nightmare.
-
-Below, we document some of the macros that we use in several of the
-skeletons.  If you are to write a new skeleton, please, implement them for
-your language.  Overall, be sure to follow the same patterns as the existing
-skeletons.
-
-## Vocabulary
-
-We use "formal arguments", or "formals" for short, to denote the declared
-parameters of a function (e.g., `int argc, const char **argv`).  Yes, this
-is somewhat contradictory with `param` in the `%param` directives.
-
-We use "effective arguments", or "args" for short, to denote the values
-passed in function calls (e.g., `argc, argv`).
-
-## Symbols
-
-### `b4_symbol(NUM, FIELD)`
-In order to unify the handling of the various aspects of symbols (tag, type
-name, whether terminal, etc.), bison.exe defines one macro per (token,
-field), where field can `has_id`, `id`, etc.: see
-`prepare_symbol_definitions()` in `src/output.c`.
-
-NUM can be:
-- `empty` to denote the "empty" pseudo-symbol when it exists,
-- `eof`, `error`, or `undef`
-- a symbol number.
-
-FIELD can be:
-
-- `has_id`: 0 or 1
-  Whether the symbol has an `id`.
-
-- `id`: string (e.g., `exp`, `NUM`, or `TOK_NUM` with api.token.prefix)
-  If `has_id`, the name of the token kind (prefixed by api.token.prefix if
-  defined), otherwise empty.  Guaranteed to be usable as a C identifier.
-  This is used to define the token kind (i.e., the enum used by the return
-  value of yylex).  Should be named `token_kind`.
-
-- `tag`: string
-  A human readable representation of the symbol.  Can be `'foo'`,
-  `'foo.id'`, `'"foo"'` etc.
-
-- `code`: integer
-  The token code associated to the token kind `id`.
-  The external number as used by yylex.  Can be ASCII code when a character,
-  some number chosen by bison, or some user number in the case of `%token
-  FOO <NUM>`.  Corresponds to `yychar` in `yacc.c`.
-
-- `is_token`: 0 or 1
-  Whether this is a terminal symbol.
-
-- `kind_base`: string (e.g., `YYSYMBOL_exp`, `YYSYMBOL_NUM`)
-  The base of the symbol kind, i.e., the enumerator of this symbol (token or
-  nonterminal) which is mapped to its `number`.
-
-- `kind`: string
-  Same as `kind_base`, but possibly with a prefix in some languages.  E.g.,
-  EOF's `kind_base` and `kind` are `YYSYMBOL_YYEOF` in C, but are
-  `S_YYEMPTY` and `symbol_kind::S_YYEMPTY` in C++.
-
-- `number`: integer
-  The code associated to the `kind`.
-  The internal number (computed from the external number by yytranslate).
-  Corresponds to yytoken in yacc.c.  This is the same number that serves as
-  key in b4_symbol(NUM, FIELD).
-
-  In bison, symbols are first assigned increasing numbers in order of
-  appearance (but tokens first, then nterms).  After grammar reduction,
-  unused nterms are then renumbered to appear last (i.e., first tokens, then
-  used nterms and finally unused nterms).  This final number NUM is the one
-  contained in this field, and it is the one used as key in `b4_symbol(NUM,
-  FIELD)`.
-
-  The code of the rule actions, however, is emitted before we know what
-  symbols are unused, so they use the original numbers.  To avoid confusion,
-  they actually use "orig NUM" instead of just "NUM".  bison also emits
-  definitions for `b4_symbol(orig NUM, number)` that map from original
-  numbers to the new ones.  `b4_symbol` actually resolves `orig NUM` in the
-  other case, i.e., `b4_symbol(orig 42, tag)` would return the tag of the
-  symbols whose original number was 42.
-
-- `has_type`: 0, 1
-  Whether has a semantic value.
-
-- `type_tag`: string
-  When api.value.type=union, the generated name for the union member.
-  yytype_INT etc. for symbols that has_id, otherwise yytype_1 etc.
-
-- `type`: string
-  If it has a semantic value, its type tag, or, if variant are used,
-  its type.
-  In the case of api.value.type=union, type is the real type (e.g. int).
-
-- `slot`: string
-  If it has a semantic value, the name of the union member (i.e., bounces to
-  either `type_tag` or `type`).  It would be better to fix our mess and
-  always use `type` for the true type of the member, and `type_tag` for the
-  name of the union member.
-
-- `has_printer`: 0, 1
-- `printer`: string
-- `printer_file`: string
-- `printer_line`: integer
-- `printer_loc`: location
-  If the symbol has a printer, everything about it.
-
-- `has_destructor`, `destructor`, `destructor_file`, `destructor_line`, `destructor_loc`
-  Likewise.
-
-### `b4_symbol_value(VAL, [SYMBOL-NUM], [TYPE-TAG])`
-Expansion of $$, $1, $<TYPE-TAG>3, etc.
-
-The semantic value from a given VAL.
-- `VAL`: some semantic value storage (typically a union).  e.g., `yylval`
-- `SYMBOL-NUM`: the symbol number from which we extract the type tag.
-- `TYPE-TAG`, the user forced the `<TYPE-TAG>`.
-
-The result can be used safely, it is put in parens to avoid nasty precedence
-issues.
-
-### `b4_lhs_value(SYMBOL-NUM, [TYPE])`
-Expansion of `$$` or `$<TYPE>$`, for symbol `SYMBOL-NUM`.
-
-### `b4_rhs_data(RULE-LENGTH, POS)`
-The data corresponding to the symbol `#POS`, where the current rule has
-`RULE-LENGTH` symbols on RHS.
-
-### `b4_rhs_value(RULE-LENGTH, POS, SYMBOL-NUM, [TYPE])`
-Expansion of `$<TYPE>POS`, where the current rule has `RULE-LENGTH` symbols
-on RHS.
-
-<!--
-
-Local Variables:
-mode: markdown
-fill-column: 76
-ispell-dictionary: "american"
-End:
-
-Copyright (C) 2002, 2008-2015, 2018-2022, 2025-2026 Free Software
-Foundation, Inc.
-
-This file is part of GNU Bison.
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
--->

data/bison-default.css

@@ -1,61 +0,0 @@
-/* Default styling rules for Bison when doing terminal output.
-   Copyright (C) 2019-2022, 2025-2026 Free Software Foundation, Inc.
-
-   This program is free software: you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
-
-/* This is an experimental feature.  The class names may change in the
-   future.  */
-
-/* Diagnostics.  */
-.warning   { color: purple; }
-.error     { color: red; }
-.note      { color: cyan; }
-
-.fixit-insert { color: green; }
-
-/* Semantic values in Bison's own parser traces.  */
-.value     { color: green; }
-
-/* "Sections" in traces (--trace).  */
-.trace0    { color: green; }
-
-/* Syntax error messages.  */
-.expected   { color: green; }
-.unexpected { color: red; }
-
-
-/* Counterexamples.  */
-
-/* Cex: point in rule.  */
-.cex-dot { color: red; }
-
-/* Cex: coloring various rules.  */
-.cex-0   { color: yellow; }
-.cex-1   { color: green; }
-.cex-2   { color: blue; }
-.cex-3   { color: purple; }
-.cex-4   { color: violet; }
-.cex-5   { color: orange; }
-.cex-6   { color: brown; }
-.cex-7   { color: mauve; }
-.cex-8   { color: #013220; } /* Dark green. */
-.cex-9   { color: #e75480; } /* Dark pink. */
-.cex-10  { color: cyan; }
-.cex-11  { color: orange; }
-
-/* Cex: derivation rewriting steps.  */
-.cex-step { font-style: italic; }
-
-/* Cex: leaves of a derivation.  */
-.cex-leaf { font-weight: 600; }

data/bison.m4

@@ -0,0 +1,554 @@
+                                                            -*- Autoconf -*-
+
+# Language-independent M4 Macros for Bison.
+# Copyright (C) 2002, 2004-2010 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+## ---------------- ##
+## Identification.  ##
+## ---------------- ##
+
+# b4_copyright(TITLE, YEARS)
+# --------------------------
+m4_define([b4_copyright],
+[b4_comment([A Bison parser, made by GNU Bison b4_version.])
+
+b4_comment([$1
+
+m4_text_wrap([Copyright (C) $2 Free Software Foundation, Inc.], [   ])
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.])
+
+b4_comment([As a special exception, you may create a larger work that contains
+part or all of the Bison parser skeleton and distribute that work
+under terms of your choice, so long as that work isn't itself a
+parser generator using the skeleton or a modified version thereof
+as a parser skeleton.  Alternatively, if you modify or redistribute
+the parser skeleton itself, you may (at your option) remove this
+special exception, which will cause the skeleton and the resulting
+Bison output files to be licensed under the GNU General Public
+License without this special exception.
+
+This special exception was added by the Free Software Foundation in
+version 2.2 of Bison.])])
+
+
+## ---------------- ##
+## Error handling.  ##
+## ---------------- ##
+
+# The following error handling macros print error directives that should not
+# become arguments of other macro invocations since they would likely then be
+# mangled.  Thus, they print to stdout directly.
+
+# b4_cat(TEXT)
+# ------------
+# Write TEXT to stdout.  Precede the final newline with an @ so that it's
+# escaped.  For example:
+#
+#   b4_cat([[@complain(invalid input@)]])
+m4_define([b4_cat],
+[m4_syscmd([cat <<'_m4eof'
+]m4_bpatsubst(m4_dquote($1), [_m4eof], [_m4@`eof])[@
+_m4eof
+])dnl
+m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])])
+
+# b4_error(KIND, FORMAT, [ARG1], [ARG2], ...)
+# -------------------------------------------
+# Write @KIND(FORMAT@,ARG1@,ARG2@,...@) to stdout.
+#
+# For example:
+#
+#   b4_error([[warn]], [[invalid value for `%s': %s]], [[foo]], [[3]])
+m4_define([b4_error],
+[b4_cat([[@]$1[(]$2[]]dnl
+[m4_if([$#], [2], [],
+       [m4_foreach([b4_arg],
+                   m4_dquote(m4_shift(m4_shift($@))),
+                   [[@,]b4_arg])])[@)]])])
+
+# b4_error_at(KIND, START, END, FORMAT, [ARG1], [ARG2], ...)
+# ----------------------------------------------------------
+# Write @KIND_at(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
+#
+# For example:
+#
+#   b4_error_at([[complain]], [[input.y:2.3]], [[input.y:5.4]],
+#               [[invalid %s]], [[foo]])
+m4_define([b4_error_at],
+[b4_cat([[@]$1[_at(]$2[@,]$3[@,]$4[]]dnl
+[m4_if([$#], [4], [],
+       [m4_foreach([b4_arg],
+                   m4_dquote(m4_shift(m4_shift(m4_shift(m4_shift($@))))),
+                   [[@,]b4_arg])])[@)]])])
+
+# b4_warn(FORMAT, [ARG1], [ARG2], ...)
+# ------------------------------------
+# Write @warn(FORMAT@,ARG1@,ARG2@,...@) to stdout.
+#
+# For example:
+#
+#   b4_warn([[invalid value for `%s': %s]], [[foo]], [[3]])
+#
+# As a simple test suite, this:
+#
+#   m4_divert(-1)
+#   m4_define([asdf], [ASDF])
+#   m4_define([fsa], [FSA])
+#   m4_define([fdsa], [FDSA])
+#   b4_warn([[[asdf), asdf]]], [[[fsa), fsa]]], [[[fdsa), fdsa]]])
+#   b4_warn([[asdf), asdf]], [[fsa), fsa]], [[fdsa), fdsa]])
+#   b4_warn()
+#   b4_warn(1)
+#   b4_warn(1, 2)
+#
+# Should produce this without newlines:
+#
+#   @warn([asdf), asdf]@,[fsa), fsa]@,[fdsa), fdsa]@)
+#   @warn(asdf), asdf@,fsa), fsa@,fdsa), fdsa@)
+#   @warn(@)
+#   @warn(1@)
+#   @warn(1@,2@)
+m4_define([b4_warn],
+[b4_error([[warn]], $@)])
+
+# b4_warn_at(START, END, FORMAT, [ARG1], [ARG2], ...)
+# ---------------------------------------------------
+# Write @warn(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
+#
+# For example:
+#
+#   b4_warn_at([[input.y:2.3]], [[input.y:5.4]], [[invalid %s]], [[foo]])
+m4_define([b4_warn_at],
+[b4_error_at([[warn]], $@)])
+
+# b4_complain(FORMAT, [ARG1], [ARG2], ...)
+# ----------------------------------------
+# Write @complain(FORMAT@,ARG1@,ARG2@,...@) to stdout.
+#
+# See b4_warn example.
+m4_define([b4_complain],
+[b4_error([[complain]], $@)])
+
+# b4_complain_at(START, END, FORMAT, [ARG1], [ARG2], ...)
+# -------------------------------------------------------
+# Write @complain(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
+#
+# See b4_warn_at example.
+m4_define([b4_complain_at],
+[b4_error_at([[complain]], $@)])
+
+# b4_fatal(FORMAT, [ARG1], [ARG2], ...)
+# -------------------------------------
+# Write @fatal(FORMAT@,ARG1@,ARG2@,...@) to stdout and exit.
+#
+# See b4_warn example.
+m4_define([b4_fatal],
+[b4_error([[fatal]], $@)dnl
+m4_exit(1)])
+
+# b4_fatal_at(START, END, FORMAT, [ARG1], [ARG2], ...)
+# ----------------------------------------------------
+# Write @fatal(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout and exit.
+#
+# See b4_warn_at example.
+m4_define([b4_fatal_at],
+[b4_error_at([[fatal]], $@)dnl
+m4_exit(1)])
+
+
+## ---------------- ##
+## Default values.  ##
+## ---------------- ##
+
+# m4_define_default([b4_lex_param], [])   dnl breaks other skeletons
+m4_define_default([b4_pre_prologue], [])
+m4_define_default([b4_post_prologue], [])
+m4_define_default([b4_epilogue], [])
+m4_define_default([b4_parse_param], [])
+
+# The initial column and line.
+m4_define_default([b4_location_initial_column], [1])
+m4_define_default([b4_location_initial_line],   [1])
+
+
+## ------------ ##
+## Data Types.  ##
+## ------------ ##
+
+# b4_ints_in(INT1, INT2, LOW, HIGH)
+# ---------------------------------
+# Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
+m4_define([b4_ints_in],
+[m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])
+
+
+
+## ------------------ ##
+## Decoding options.  ##
+## ------------------ ##
+
+# b4_flag_if(FLAG, IF-TRUE, IF-FALSE)
+# -----------------------------------
+# Run IF-TRUE if b4_FLAG_flag is 1, IF-FALSE if FLAG is 0, otherwise fail.
+m4_define([b4_flag_if],
+[m4_case(b4_$1_flag,
+         [0], [$3],
+	 [1], [$2],
+	 [m4_fatal([invalid $1 value: ]$1)])])
+
+
+# b4_define_flag_if(FLAG)
+# -----------------------
+# Define "b4_FLAG_if(IF-TRUE, IF-FALSE)" that depends on the
+# value of the Boolean FLAG.
+m4_define([b4_define_flag_if],
+[_b4_define_flag_if($[1], $[2], [$1])])
+
+# _b4_define_flag_if($1, $2, FLAG)
+# --------------------------------
+# This macro works around the impossibility to define macros
+# inside macros, because issuing `[$1]' is not possible in M4 :(.
+# This sucks hard, GNU M4 should really provide M5 like $$1.
+m4_define([_b4_define_flag_if],
+[m4_if([$1$2], $[1]$[2], [],
+       [m4_fatal([$0: Invalid arguments: $@])])dnl
+m4_define([b4_$3_if],
+          [b4_flag_if([$3], [$1], [$2])])])
+
+
+# b4_FLAG_if(IF-TRUE, IF-FALSE)
+# -----------------------------
+# Expand IF-TRUE, if FLAG is true, IF-FALSE otherwise.
+b4_define_flag_if([defines])	        # Whether headers are requested.
+b4_define_flag_if([error_verbose])	# Whether error are verbose.
+b4_define_flag_if([glr])		# Whether a GLR parser is requested.
+b4_define_flag_if([locations])	        # Whether locations are tracked.
+b4_define_flag_if([nondeterministic])	# Whether conflicts should be handled.
+b4_define_flag_if([yacc])	        # Whether POSIX Yacc is emulated.
+
+
+## ------------------------- ##
+## Assigning token numbers.  ##
+## ------------------------- ##
+
+
+## ----------- ##
+## Synclines.  ##
+## ----------- ##
+
+# b4_basename(NAME)
+# -----------------
+# Similar to POSIX basename; the differences don't matter here.
+# Beware that NAME is not evaluated.
+m4_define([b4_basename],
+[m4_bpatsubst([$1], [^.*/\([^/]+\)/*$], [\1])])
+
+
+# b4_syncline(LINE, FILE)
+# -----------------------
+m4_define([b4_syncline],
+[b4_flag_if([synclines], [
+b4_sync_end([__line__], [b4_basename(m4_quote(__file__))])
+b4_sync_start([$1], [$2])])])
+
+m4_define([b4_sync_end], [b4_comment([Line $1 of $2])])
+m4_define([b4_sync_start], [b4_comment([Line $1 of $2])])
+
+# b4_user_code(USER-CODE)
+# -----------------------
+# Emit code from the user, ending it with synclines.
+m4_define([b4_user_code],
+[$1
+b4_syncline([@oline@], [@ofile@])])
+
+
+# b4_define_user_code(MACRO)
+# --------------------------
+# From b4_MACRO, build b4_user_MACRO that includes the synclines.
+m4_define([b4_define_user_code],
+[m4_define([b4_user_$1],
+[b4_user_code([b4_$1])])])
+
+
+# b4_user_actions
+# b4_user_initial_action
+# b4_user_post_prologue
+# b4_user_pre_prologue
+# b4_user_stype
+# ----------------------
+# Macros that issue user code, ending with synclines.
+b4_define_user_code([actions])
+b4_define_user_code([initial_action])
+b4_define_user_code([post_prologue])
+b4_define_user_code([pre_prologue])
+b4_define_user_code([stype])
+
+
+# b4_check_user_names(WHAT, USER-LIST, BISON-NAMESPACE)
+# --------------------------------------------------------
+# Warn if any name of type WHAT is used by the user (as recorded in USER-LIST)
+# but is not used by Bison (as recorded by macros in the namespace
+# BISON-NAMESPACE).
+#
+# USER-LIST must expand to a list specifying all grammar occurrences of all
+# names of type WHAT.   Each item in the list must be a triplet specifying one
+# occurrence: name, start boundary, and end boundary.  Empty string names are
+# fine.  An empty list is fine.
+#
+# For example, to define b4_foo_user_names to be used for USER-LIST with three
+# name occurrences and with correct quoting:
+#
+#   m4_define([b4_foo_user_names],
+#             [[[[[[bar]], [[parser.y:1.7]], [[parser.y:1.16]]]],
+#               [[[[bar]], [[parser.y:5.7]], [[parser.y:5.16]]]],
+#               [[[[baz]], [[parser.y:8.7]], [[parser.y:8.16]]]]]])
+#
+# The macro BISON-NAMESPACE(bar) must be defined iff the name bar of type WHAT
+# is used by Bison (in the front-end or in the skeleton).  Empty string names
+# are fine, but it would be ugly for Bison to actually use one.
+#
+# For example, to use b4_foo_bison_names for BISON-NAMESPACE and define that
+# the names bar and baz are used by Bison:
+#
+#   m4_define([b4_foo_bison_names(bar)])
+#   m4_define([b4_foo_bison_names(baz)])
+#
+# To invoke b4_check_user_names with TYPE foo, with USER-LIST
+# b4_foo_user_names, with BISON-NAMESPACE b4_foo_bison_names, and with correct
+# quoting:
+#
+#   b4_check_user_names([[foo]], [b4_foo_user_names],
+#                       [[b4_foo_bison_names]])
+m4_define([b4_check_user_names],
+[m4_foreach([b4_occurrence], $2,
+[m4_pushdef([b4_occurrence], b4_occurrence)dnl
+m4_pushdef([b4_user_name], m4_car(b4_occurrence))dnl
+m4_pushdef([b4_start], m4_car(m4_shift(b4_occurrence)))dnl
+m4_pushdef([b4_end], m4_shift(m4_shift(b4_occurrence)))dnl
+m4_ifndef($3[(]m4_quote(b4_user_name)[)],
+          [b4_warn_at([b4_start], [b4_end],
+                      [[%s `%s' is not used]],
+                      [$1], [b4_user_name])])[]dnl
+m4_popdef([b4_occurrence])dnl
+m4_popdef([b4_user_name])dnl
+m4_popdef([b4_start])dnl
+m4_popdef([b4_end])dnl
+])])
+
+# b4_percent_define_get(VARIABLE)
+# -------------------------------
+# Mimic muscle_percent_define_get in ../src/muscle_tab.h exactly.  That is, if
+# the %define variable VARIABLE is defined, emit its value.  Also, record
+# Bison's usage of VARIABLE by defining
+# b4_percent_define_bison_variables(VARIABLE).
+#
+# For example:
+#
+#   b4_percent_define_get([[foo]])
+m4_define([b4_percent_define_get],
+[m4_define([b4_percent_define_bison_variables(]$1[)])dnl
+m4_ifdef([b4_percent_define(]$1[)], [m4_indir([b4_percent_define(]$1[)])])])
+
+# b4_percent_define_get_loc(VARIABLE)
+# -----------------------------------
+# Mimic muscle_percent_define_get_loc in ../src/muscle_tab.h exactly.  That is,
+# if the %define variable VARIABLE is undefined, complain fatally since that's
+# a Bison or skeleton error.  Otherwise, return its definition location in a
+# form approriate for the first two arguments of b4_warn_at, b4_complain_at, or
+# b4_fatal_at.  Don't record this as a Bison usage of VARIABLE as there's no
+# reason to suspect that the user-supplied value has yet influenced the output.
+#
+# For example:
+#
+#   b4_complain_at(b4_percent_define_get_loc([[foo]]), [[invalid foo]])
+m4_define([b4_percent_define_get_loc],
+[m4_ifdef([b4_percent_define_loc(]$1[)],
+          [m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl
+b4_loc[]dnl
+m4_popdef([b4_loc])],
+          [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_loc]], [$1])])])
+
+# b4_percent_define_get_syncline(VARIABLE)
+# ----------------------------------------
+# Mimic muscle_percent_define_get_syncline in ../src/muscle_tab.h exactly.
+# That is, if the %define variable VARIABLE is undefined, complain fatally
+# since that's a Bison or skeleton error.  Otherwise, return its definition
+# location as a b4_syncline invocation.  Don't record this as a Bison usage of
+# VARIABLE as there's no reason to suspect that the user-supplied value has yet
+# influenced the output.
+#
+# For example:
+#
+#   b4_percent_define_get_syncline([[foo]])
+m4_define([b4_percent_define_get_syncline],
+[m4_ifdef([b4_percent_define_syncline(]$1[)],
+          [m4_indir([b4_percent_define_syncline(]$1[)])],
+          [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_syncline]], [$1])])])
+
+# b4_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE])
+# ------------------------------------------------------
+# Mimic muscle_percent_define_ifdef in ../src/muscle_tab.h exactly.  That is,
+# if the %define variable VARIABLE is defined, expand IF-TRUE, else expand
+# IF-FALSE.  Also, record Bison's usage of VARIABLE by defining
+# b4_percent_define_bison_variables(VARIABLE).
+#
+# For example:
+#
+#   b4_percent_define_ifdef([[foo]], [[it's defined]], [[it's undefined]])
+m4_define([b4_percent_define_ifdef],
+[m4_ifdef([b4_percent_define(]$1[)],
+	  [m4_define([b4_percent_define_bison_variables(]$1[)])$2],
+	  [$3])])
+
+# b4_percent_define_flag_if(VARIABLE, IF-TRUE, [IF-FALSE])
+# --------------------------------------------------------
+# Mimic muscle_percent_define_flag_if in ../src/muscle_tab.h exactly.  That is,
+# if the %define variable VARIABLE is defined to "" or "true", expand IF-TRUE.
+# If it is defined to "false", expand IF-FALSE.  Complain if it is undefined
+# (a Bison or skeleton error since the default value should have been set
+# already) or defined to any other value (possibly a user error).  Also, record
+# Bison's usage of VARIABLE by defining
+# b4_percent_define_bison_variables(VARIABLE).
+#
+# For example:
+#
+#   b4_percent_define_flag_if([[foo]], [[it's true]], [[it's false]])
+m4_define([b4_percent_define_flag_if],
+[b4_percent_define_ifdef([$1],
+  [m4_case(b4_percent_define_get([$1]),
+           [], [$2], [true], [$2], [false], [$3],
+           [m4_expand_once([b4_complain_at(b4_percent_define_get_loc([$1]),
+                                           [[invalid value for %%define Boolean variable `%s']],
+                                           [$1])],
+                           [[b4_percent_define_flag_if($1)]])])],
+  [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_flag_if]], [$1])])])
+
+# b4_percent_define_default(VARIABLE, DEFAULT)
+# --------------------------------------------
+# Mimic muscle_percent_define_default in ../src/muscle_tab.h exactly.  That is,
+# if the %define variable VARIABLE is undefined, set its value to DEFAULT.
+# Don't record this as a Bison usage of VARIABLE as there's no reason to
+# suspect that the value has yet influenced the output.
+#
+# For example:
+#
+#   b4_percent_define_default([[foo]], [[default value]])
+m4_define([b4_percent_define_default],
+[m4_ifndef([b4_percent_define(]$1[)],
+           [m4_define([b4_percent_define(]$1[)], [$2])dnl
+            m4_define([b4_percent_define_loc(]$1[)],
+                      [[[[<skeleton default value>:-1.-1]],
+                        [[<skeleton default value>:-1.-1]]]])dnl
+            m4_define([b4_percent_define_syncline(]$1[)], [[]])])])
+
+# b4_percent_define_check_values(VALUES)
+# --------------------------------------
+# Mimic muscle_percent_define_check_values in ../src/muscle_tab.h exactly
+# except that the VALUES structure is more appropriate for M4.  That is, VALUES
+# is a list of sublists of strings.  For each sublist, the first string is the
+# name of a %define variable, and all remaining strings in that sublist are the
+# valid values for that variable.  Complain if such a variable is undefined (a
+# Bison error since the default value should have been set already) or defined
+# to any other value (possibly a user error).  Don't record this as a Bison
+# usage of the variable as there's no reason to suspect that the value has yet
+# influenced the output.
+#
+# For example:
+#
+#   b4_percent_define_check_values([[[[foo]], [[foo-value1]], [[foo-value2]]]],
+#                                  [[[[bar]], [[bar-value1]]]])
+m4_define([b4_percent_define_check_values],
+[m4_foreach([b4_sublist], m4_quote($@),
+            [_b4_percent_define_check_values(b4_sublist)])])
+
+m4_define([_b4_percent_define_check_values],
+[m4_ifdef([b4_percent_define(]$1[)],
+  [m4_pushdef([b4_good_value], [0])dnl
+   m4_if($#, 1, [],
+         [m4_foreach([b4_value], m4_dquote(m4_shift($@)),
+                     [m4_if(m4_indir([b4_percent_define(]$1[)]), b4_value,
+                            [m4_define([b4_good_value], [1])])])])dnl
+   m4_if(b4_good_value, [0],
+         [b4_complain_at(b4_percent_define_get_loc([$1]),
+                         [[invalid value for %%define variable `%s': `%s']],
+                         [$1],
+                         m4_dquote(m4_indir([b4_percent_define(]$1[)])))])dnl
+   m4_popdef([b4_good_value])],
+  [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_check_values]], [$1])])])
+
+# b4_percent_code_get([QUALIFIER])
+# --------------------------------
+# If any %code blocks for QUALIFIER are defined, emit them beginning with a
+# comment and ending with synclines and a newline.  If QUALIFIER is not
+# specified or empty, do this for the unqualified %code blocks.  Also, record
+# Bison's usage of QUALIFIER (if specified) by defining
+# b4_percent_code_bison_qualifiers(QUALIFIER).
+#
+# For example, to emit any unqualified %code blocks followed by any %code
+# blocks for the qualifier foo:
+#
+#   b4_percent_code_get
+#   b4_percent_code_get([[foo]])
+m4_define([b4_percent_code_get],
+[m4_pushdef([b4_macro_name], [[b4_percent_code(]$1[)]])dnl
+m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])dnl
+m4_ifdef(b4_macro_name,
+[b4_comment([m4_if([$#], [0], [[Unqualified %code]],
+                   [["%code ]$1["]])[ blocks.]])
+b4_user_code([m4_indir(b4_macro_name)])
+])dnl
+m4_popdef([b4_macro_name])])
+
+# b4_percent_code_ifdef(QUALIFIER, IF-TRUE, [IF-FALSE])
+# -----------------------------------------------------
+# If any %code blocks for QUALIFIER (or unqualified %code blocks if
+# QUALIFIER is empty) are defined, expand IF-TRUE, else expand IF-FALSE.
+# Also, record Bison's usage of QUALIFIER (if specified) by defining
+# b4_percent_code_bison_qualifiers(QUALIFIER).
+m4_define([b4_percent_code_ifdef],
+[m4_ifdef([b4_percent_code(]$1[)],
+          [m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])$2],
+	  [$3])])
+
+
+## ----------------------------------------------------------- ##
+## After processing the skeletons, check that all the user's   ##
+## %define variables and %code qualifiers were used by Bison.  ##
+## ----------------------------------------------------------- ##
+
+m4_define([b4_check_user_names_wrap],
+[m4_ifdef([b4_percent_]$1[_user_]$2[s],
+          [b4_check_user_names([[%]$1 $2],
+                               [b4_percent_]$1[_user_]$2[s],
+                               [[b4_percent_]$1[_bison_]$2[s]])])])
+
+m4_wrap_lifo([
+b4_check_user_names_wrap([[define]], [[variable]])
+b4_check_user_names_wrap([[code]], [[qualifier]])
+])

data/c++-skel.m4

@@ -1,9 +1,7 @@
                                                             -*- Autoconf -*-
 
 # C++ skeleton dispatching for Bison.
-
-# Copyright (C) 2006-2007, 2009-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
+# Copyright (C) 2006-2007, 2009-2010 Free Software Foundation, Inc.
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -16,12 +14,12 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-b4_glr_if(             [m4_define([b4_used_skeleton], [b4_skeletonsdir/[glr.cc]])])
-b4_nondeterministic_if([m4_define([b4_used_skeleton], [b4_skeletonsdir/[glr.cc]])])
+b4_glr_if(             [m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.cc]])])
+b4_nondeterministic_if([m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.cc]])])
 
-m4_define_default([b4_used_skeleton], [b4_skeletonsdir/[lalr1.cc]])
+m4_define_default([b4_used_skeleton], [b4_pkgdatadir/[lalr1.cc]])
 m4_define_default([b4_skeleton], ["b4_basename(b4_used_skeleton)"])
 
 m4_include(b4_used_skeleton)

data/c++.m4

@@ -0,0 +1,169 @@
+                                                            -*- Autoconf -*-
+
+# C++ skeleton for Bison
+
+# Copyright (C) 2002-2010 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+m4_include(b4_pkgdatadir/[c.m4])
+
+## ---------------- ##
+## Default values.  ##
+## ---------------- ##
+
+# Default parser class name.
+b4_percent_define_default([[parser_class_name]], [[parser]])
+b4_percent_define_default([[location_type]], [[location]])
+b4_percent_define_default([[filename_type]], [[std::string]])
+b4_percent_define_default([[namespace]], m4_defn([b4_prefix]))
+b4_percent_define_default([[global_tokens_and_yystype]], [[false]])
+b4_percent_define_default([[define_location_comparison]],
+                          [m4_if(b4_percent_define_get([[filename_type]]),
+                                 [std::string], [[true]], [[false]])])
+
+
+## ----------- ##
+## Namespace.  ##
+## ----------- ##
+
+m4_define([b4_namespace_ref], [b4_percent_define_get([[namespace]])])
+
+# Don't permit an empty b4_namespace_ref.  Any `::parser::foo' appended to it
+# would compile as an absolute reference with `parser' in the global namespace.
+# b4_namespace_open would open an anonymous namespace and thus establish
+# internal linkage.  This would compile.  However, it's cryptic, and internal
+# linkage for the parser would be specified in all translation units that
+# include the header, which is always generated.  If we ever need to permit
+# internal linkage somehow, surely we can find a cleaner approach.
+m4_if(m4_bregexp(b4_namespace_ref, [^[	 ]*$]), [-1], [],
+[b4_complain_at(b4_percent_define_get_loc([[namespace]]),
+                [[namespace reference is empty]])])
+
+# Instead of assuming the C++ compiler will do it, Bison should reject any
+# invalid b4_namepsace_ref that would be converted to a valid
+# b4_namespace_open.  The problem is that Bison doesn't always output
+# b4_namespace_ref to uncommented code but should reserve the ability to do so
+# in future releases without risking breaking any existing user grammars.
+# Specifically, don't allow empty names as b4_namespace_open would just convert
+# those into anonymous namespaces, and that might tempt some users.
+m4_if(m4_bregexp(b4_namespace_ref, [::[	 ]*::]), [-1], [],
+[b4_complain_at(b4_percent_define_get_loc([[namespace]]),
+                [[namespace reference has consecutive "::"]])])
+m4_if(m4_bregexp(b4_namespace_ref, [::[	 ]*$]), [-1], [],
+[b4_complain_at(b4_percent_define_get_loc([[namespace]]),
+                [[namespace reference has a trailing "::"]])])
+
+m4_define([b4_namespace_open],
+[b4_user_code([b4_percent_define_get_syncline([[namespace]])
+[namespace ]m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref),
+                                                [^\(.\)[	 ]*::], [\1])),
+                         [::], [ { namespace ])[ {]])])
+
+m4_define([b4_namespace_close],
+[b4_user_code([b4_percent_define_get_syncline([[namespace]])
+m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref[ ]),
+                                    [^\(.\)[	 ]*\(::\)?\([^][:]\|:[^][:]\)*],
+                                    [\1])),
+             [::\([^][:]\|:[^][:]\)*], [} ])[} // ]b4_namespace_ref])])
+
+
+# b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
+# -----------------------------------------------------
+# Output the definition of the tokens as enums.
+m4_define([b4_token_enums],
+[/* Tokens.  */
+   enum yytokentype {
+m4_map_sep([     b4_token_enum], [,
+],
+           [$@])
+   };
+])
+
+
+## ----------------- ##
+## Semantic Values.  ##
+## ----------------- ##
+
+
+# b4_lhs_value([TYPE])
+# --------------------
+# Expansion of $<TYPE>$.
+m4_define([b4_lhs_value],
+[(yyval[]m4_ifval([$1], [.$1]))])
+
+
+# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
+# --------------------------------------
+# Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
+# symbols on RHS.
+m4_define([b4_rhs_value],
+[(yysemantic_stack_@{($1) - ($2)@}m4_ifval([$3], [.$3]))])
+
+# b4_lhs_location()
+# -----------------
+# Expansion of @$.
+m4_define([b4_lhs_location],
+[(yyloc)])
+
+
+# b4_rhs_location(RULE-LENGTH, NUM)
+# ---------------------------------
+# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
+# on RHS.
+m4_define([b4_rhs_location],
+[(yylocation_stack_@{($1) - ($2)@})])
+
+
+# b4_parse_param_decl
+# -------------------
+# Extra formal arguments of the constructor.
+# Change the parameter names from "foo" into "foo_yyarg", so that
+# there is no collision bw the user chosen attribute name, and the
+# argument name in the constructor.
+m4_define([b4_parse_param_decl],
+[m4_ifset([b4_parse_param],
+          [m4_map_sep([b4_parse_param_decl_1], [, ], [b4_parse_param])])])
+
+m4_define([b4_parse_param_decl_1],
+[$1_yyarg])
+
+
+
+# b4_parse_param_cons
+# -------------------
+# Extra initialisations of the constructor.
+m4_define([b4_parse_param_cons],
+          [m4_ifset([b4_parse_param],
+		    [
+      b4_cc_constructor_calls(b4_parse_param)])])
+m4_define([b4_cc_constructor_calls],
+	  [m4_map_sep([b4_cc_constructor_call], [,
+      ], [$@])])
+m4_define([b4_cc_constructor_call],
+	  [$2 ($2_yyarg)])
+
+# b4_parse_param_vars
+# -------------------
+# Extra instance variables.
+m4_define([b4_parse_param_vars],
+          [m4_ifset([b4_parse_param],
+		    [
+    /* User arguments.  */
+b4_cc_var_decls(b4_parse_param)])])
+m4_define([b4_cc_var_decls],
+	  [m4_map_sep([b4_cc_var_decl], [
+], [$@])])
+m4_define([b4_cc_var_decl],
+	  [    $1;])

data/c-skel.m4

@@ -1,9 +1,7 @@
                                                             -*- Autoconf -*-
 
 # C skeleton dispatching for Bison.
-
-# Copyright (C) 2006-2007, 2009-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
+# Copyright (C) 2006-2007, 2009-2010 Free Software Foundation, Inc.
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -16,12 +14,12 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-b4_glr_if(             [m4_define([b4_used_skeleton], [b4_skeletonsdir/[glr.c]])])
-b4_nondeterministic_if([m4_define([b4_used_skeleton], [b4_skeletonsdir/[glr.c]])])
+b4_glr_if(             [m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.c]])])
+b4_nondeterministic_if([m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.c]])])
 
-m4_define_default([b4_used_skeleton], [b4_skeletonsdir/[yacc.c]])
+m4_define_default([b4_used_skeleton], [b4_pkgdatadir/[yacc.c]])
 m4_define_default([b4_skeleton], ["b4_basename(b4_used_skeleton)"])
 
 m4_include(b4_used_skeleton)

data/c.m4

@@ -0,0 +1,476 @@
+                                                            -*- Autoconf -*-
+
+# C M4 Macros for Bison.
+# Copyright (C) 2002, 2004-2010 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+## ---------------- ##
+## Identification.  ##
+## ---------------- ##
+
+# b4_comment(TEXT)
+# ----------------
+m4_define([b4_comment], [/* m4_bpatsubst([$1], [
+], [
+   ])  */])
+
+# b4_identification
+# -----------------
+# Depends on individual skeletons to define b4_pure_flag, b4_push_flag, or
+# b4_pull_flag if they use the values of the %define variables api.pure or
+# api.push_pull.
+m4_define([b4_identification],
+[[/* Identify Bison output.  */
+#define YYBISON 1
+
+/* Bison version.  */
+#define YYBISON_VERSION "]b4_version["
+
+/* Skeleton name.  */
+#define YYSKELETON_NAME ]b4_skeleton[]m4_ifdef([b4_pure_flag], [[
+
+/* Pure parsers.  */
+#define YYPURE ]b4_pure_flag])[]m4_ifdef([b4_push_flag], [[
+
+/* Push parsers.  */
+#define YYPUSH ]b4_push_flag])[]m4_ifdef([b4_pull_flag], [[
+
+/* Pull parsers.  */
+#define YYPULL ]b4_pull_flag])[
+
+/* Using locations.  */
+#define YYLSP_NEEDED ]b4_locations_flag[
+]])
+
+
+## ---------------- ##
+## Default values.  ##
+## ---------------- ##
+
+# If the %union is not named, its name is YYSTYPE.
+m4_define_default([b4_union_name], [YYSTYPE])
+
+# If the %name-prefix is not given, it is yy.
+m4_define_default([b4_prefix], [yy])
+
+## ------------------------ ##
+## Pure/impure interfaces.  ##
+## ------------------------ ##
+
+# b4_user_args
+# ------------
+m4_define([b4_user_args],
+[m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])])
+
+
+# b4_parse_param
+# --------------
+# If defined, b4_parse_param arrives double quoted, but below we prefer
+# it to be single quoted.
+m4_define([b4_parse_param],
+b4_parse_param)
+
+
+# b4_parse_param_for(DECL, FORMAL, BODY)
+# ---------------------------------------
+# Iterate over the user parameters, binding the declaration to DECL,
+# the formal name to FORMAL, and evaluating the BODY.
+m4_define([b4_parse_param_for],
+[m4_foreach([$1_$2], m4_defn([b4_parse_param]),
+[m4_pushdef([$1], m4_unquote(m4_car($1_$2)))dnl
+m4_pushdef([$2], m4_shift($1_$2))dnl
+$3[]dnl
+m4_popdef([$2])dnl
+m4_popdef([$1])dnl
+])])
+
+# b4_parse_param_use
+# ------------------
+# `YYUSE' all the parse-params.
+m4_define([b4_parse_param_use],
+[b4_parse_param_for([Decl], [Formal], [  YYUSE (Formal);
+])dnl
+])
+
+
+## ------------ ##
+## Data Types.  ##
+## ------------ ##
+
+# b4_int_type(MIN, MAX)
+# ---------------------
+# Return the smallest int type able to handle numbers ranging from
+# MIN to MAX (included).
+m4_define([b4_int_type],
+[m4_if(b4_ints_in($@,      [0],   [255]), [1], [unsigned char],
+       b4_ints_in($@,   [-128],   [127]), [1], [signed char],
+
+       b4_ints_in($@,      [0], [65535]), [1], [unsigned short int],
+       b4_ints_in($@, [-32768], [32767]), [1], [short int],
+
+       m4_eval([0 <= $1]),                [1], [unsigned int],
+
+					       [int])])
+
+
+# b4_int_type_for(NAME)
+# ---------------------
+# Return the smallest int type able to handle numbers ranging from
+# `NAME_min' to `NAME_max' (included).
+m4_define([b4_int_type_for],
+[b4_int_type($1_min, $1_max)])
+
+
+
+## ---------##
+## Values.  ##
+## ---------##
+
+# b4_null
+---------
+# Return a null pointer constant.  NULL infringes on the user name
+# space in C, so use 0 rather than NULL.
+m4_define([b4_null], [0])
+
+
+
+
+## ------------------------- ##
+## Assigning token numbers.  ##
+## ------------------------- ##
+
+# b4_token_define(TOKEN-NAME, TOKEN-NUMBER)
+# -----------------------------------------
+# Output the definition of this token as #define.
+m4_define([b4_token_define],
+[#define $1 $2
+])
+
+
+# b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
+# -------------------------------------------------------
+# Output the definition of the tokens (if there are) as #defines.
+m4_define([b4_token_defines],
+[m4_if([$#$1], [1], [],
+[/* Tokens.  */
+m4_map([b4_token_define], [$@])])
+])
+
+
+# b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
+# ---------------------------------------
+# Output the definition of this token as an enum.
+m4_define([b4_token_enum],
+[$1 = $2])
+
+
+# b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
+# -----------------------------------------------------
+# Output the definition of the tokens (if there are) as enums.
+m4_define([b4_token_enums],
+[m4_if([$#$1], [1], [],
+[/* Tokens.  */
+#ifndef YYTOKENTYPE
+# define YYTOKENTYPE
+   /* Put the tokens into the symbol table, so that GDB and other debuggers
+      know about them.  */
+   enum yytokentype {
+m4_map_sep([     b4_token_enum], [,
+],
+	   [$@])
+   };
+#endif
+])])
+
+
+# b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
+# -------------------------------------------------------------
+# Output the definition of the tokens (if there are any) as enums and, if POSIX
+# Yacc is enabled, as #defines.
+m4_define([b4_token_enums_defines],
+[b4_token_enums($@)b4_yacc_if([b4_token_defines($@)], [])
+])
+
+
+
+## --------------------------------------------- ##
+## Defining C functions in both K&R and ANSI-C.  ##
+## --------------------------------------------- ##
+
+
+# b4_modern_c
+# -----------
+# A predicate useful in #if to determine whether C is ancient or modern.
+#
+# If __STDC__ is defined, the compiler is modern.  IBM xlc 7.0 when run
+# as 'cc' doesn't define __STDC__ (or __STDC_VERSION__) for pedantic
+# reasons, but it defines __C99__FUNC__ so check that as well.
+# Microsoft C normally doesn't define these macros, but it defines _MSC_VER.
+# Consider a C++ compiler to be modern if it defines __cplusplus.
+#
+m4_define([b4_c_modern],
+  [[(defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)]])
+
+# b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
+# ----------------------------------------------------------
+# Declare the function NAME.
+m4_define([b4_c_function_def],
+[#if b4_c_modern
+b4_c_ansi_function_def($@)
+#else
+$2
+$1 (b4_c_knr_formal_names(m4_shift2($@)))
+b4_c_knr_formal_decls(m4_shift2($@))
+#endif[]dnl
+])
+
+
+# b4_c_ansi_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
+# ---------------------------------------------------------------
+# Declare the function NAME in ANSI.
+m4_define([b4_c_ansi_function_def],
+[$2
+$1 (b4_c_ansi_formals(m4_shift2($@)))[]dnl
+])
+
+
+# b4_c_ansi_formals([DECL1, NAME1], ...)
+# --------------------------------------
+# Output the arguments ANSI-C definition.
+m4_define([b4_c_ansi_formals],
+[m4_if([$#], [0], [void],
+       [$#$1], [1], [void],
+	       [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
+
+m4_define([b4_c_ansi_formal],
+[$1])
+
+
+# b4_c_knr_formal_names([DECL1, NAME1], ...)
+# ------------------------------------------
+# Output the argument names.
+m4_define([b4_c_knr_formal_names],
+[m4_map_sep([b4_c_knr_formal_name], [, ], [$@])])
+
+m4_define([b4_c_knr_formal_name],
+[$2])
+
+
+# b4_c_knr_formal_decls([DECL1, NAME1], ...)
+# ------------------------------------------
+# Output the K&R argument declarations.
+m4_define([b4_c_knr_formal_decls],
+[m4_map_sep([b4_c_knr_formal_decl],
+	    [
+],
+	    [$@])])
+
+m4_define([b4_c_knr_formal_decl],
+[    $1;])
+
+
+
+## ------------------------------------------------------------ ##
+## Declaring (prototyping) C functions in both K&R and ANSI-C.  ##
+## ------------------------------------------------------------ ##
+
+
+# b4_c_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
+# -----------------------------------------------------------
+# Declare the function NAME.
+m4_define([b4_c_function_decl],
+[#if defined __STDC__ || defined __cplusplus
+b4_c_ansi_function_decl($@)
+#else
+$2 $1 ();
+#endif[]dnl
+])
+
+
+# b4_c_ansi_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
+# ----------------------------------------------------------------
+# Declare the function NAME.
+m4_define([b4_c_ansi_function_decl],
+[$2 $1 (b4_c_ansi_formals(m4_shift2($@)));[]dnl
+])
+
+
+
+
+## --------------------- ##
+## Calling C functions.  ##
+## --------------------- ##
+
+
+# b4_c_function_call(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
+# -----------------------------------------------------------
+# Call the function NAME with arguments NAME1, NAME2 etc.
+m4_define([b4_c_function_call],
+[$1 (b4_c_args(m4_shift2($@)))[]dnl
+])
+
+
+# b4_c_args([DECL1, NAME1], ...)
+# ------------------------------
+# Output the arguments NAME1, NAME2...
+m4_define([b4_c_args],
+[m4_map_sep([b4_c_arg], [, ], [$@])])
+
+m4_define([b4_c_arg],
+[$2])
+
+
+## ----------- ##
+## Synclines.  ##
+## ----------- ##
+
+# b4_sync_start(LINE, FILE)
+# -----------------------
+m4_define([b4_sync_start], [[#]line $1 $2])
+
+
+## -------------- ##
+## User actions.  ##
+## -------------- ##
+
+# b4_case(LABEL, STATEMENTS)
+# --------------------------
+m4_define([b4_case],
+[  case $1:
+$2
+    break;])
+
+# b4_symbol_actions(FILENAME, LINENO,
+#                   SYMBOL-TAG, SYMBOL-NUM,
+#                   SYMBOL-ACTION, SYMBOL-TYPENAME)
+# -------------------------------------------------
+m4_define([b4_symbol_actions],
+[m4_pushdef([b4_dollar_dollar],
+   [m4_ifval([$6], [(yyvaluep->$6)], [(*yyvaluep)])])dnl
+m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl
+      case $4: /* $3 */
+b4_syncline([$2], [$1])
+	$5;
+b4_syncline([@oline@], [@ofile@])
+	break;
+m4_popdef([b4_at_dollar])dnl
+m4_popdef([b4_dollar_dollar])dnl
+])
+
+
+# b4_yydestruct_generate(FUNCTION-DECLARATOR)
+# -------------------------------------------
+# Generate the "yydestruct" function, which declaration is issued using
+# FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
+# or "b4_c_function_def" for K&R.
+m4_define_default([b4_yydestruct_generate],
+[[/*-----------------------------------------------.
+| Release the memory associated to this symbol.  |
+`-----------------------------------------------*/
+
+/*ARGSUSED*/
+]$1([yydestruct],
+    [static void],
+    [[const char *yymsg],    [yymsg]],
+    [[int yytype],           [yytype]],
+    [[YYSTYPE *yyvaluep],    [yyvaluep]][]dnl
+b4_locations_if(            [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
+m4_ifset([b4_parse_param], [, b4_parse_param]))[
+{
+  YYUSE (yyvaluep);
+]b4_locations_if([  YYUSE (yylocationp);
+])dnl
+b4_parse_param_use[]dnl
+[
+  if (!yymsg)
+    yymsg = "Deleting";
+  YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
+
+  switch (yytype)
+    {
+]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
+      default:
+	break;
+    }
+}]dnl
+])
+
+
+# b4_yy_symbol_print_generate(FUNCTION-DECLARATOR)
+# ------------------------------------------------
+# Generate the "yy_symbol_print" function, which declaration is issued using
+# FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
+# or "b4_c_function_def" for K&R.
+m4_define_default([b4_yy_symbol_print_generate],
+[[
+/*--------------------------------.
+| Print this symbol on YYOUTPUT.  |
+`--------------------------------*/
+
+/*ARGSUSED*/
+]$1([yy_symbol_value_print],
+    [static void],
+	       [[FILE *yyoutput],                       [yyoutput]],
+	       [[int yytype],                           [yytype]],
+	       [[YYSTYPE const * const yyvaluep],       [yyvaluep]][]dnl
+b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
+m4_ifset([b4_parse_param], [, b4_parse_param]))[
+{
+  if (!yyvaluep)
+    return;
+]b4_locations_if([  YYUSE (yylocationp);
+])dnl
+b4_parse_param_use[]dnl
+[# ifdef YYPRINT
+  if (yytype < YYNTOKENS)
+    YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
+# else
+  YYUSE (yyoutput);
+# endif
+  switch (yytype)
+    {
+]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
+[      default:
+	break;
+    }
+}
+
+
+/*--------------------------------.
+| Print this symbol on YYOUTPUT.  |
+`--------------------------------*/
+
+]$1([yy_symbol_print],
+    [static void],
+	       [[FILE *yyoutput],                       [yyoutput]],
+	       [[int yytype],                           [yytype]],
+	       [[YYSTYPE const * const yyvaluep],       [yyvaluep]][]dnl
+b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
+m4_ifset([b4_parse_param], [, b4_parse_param]))[
+{
+  if (yytype < YYNTOKENS)
+    YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
+  else
+    YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
+
+]b4_locations_if([  YY_LOCATION_PRINT (yyoutput, *yylocationp);
+  YYFPRINTF (yyoutput, ": ");
+])dnl
+[  yy_symbol_value_print (yyoutput, yytype, yyvaluep]dnl
+b4_locations_if([, yylocationp])[]b4_user_args[);
+  YYFPRINTF (yyoutput, ")");
+}]dnl
+])

data/glr.cc

@@ -0,0 +1,376 @@
+                                                                    -*- C -*-
+
+# C++ GLR skeleton for Bison
+# Copyright (C) 2002-2010 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+# This skeleton produces a C++ class that encapsulates a C glr parser.
+# This is in order to reduce the maintenance burden.  The glr.c
+# skeleton is clean and pure enough so that there are no real
+# problems.  The C++ interface is the same as that of lalr1.cc.  In
+# fact, glr.c can replace yacc.c without the user noticing any
+# difference, and similarly for glr.cc replacing lalr1.cc.
+#
+# The passing of parse-params
+#
+#   The additional arguments are stored as members of the parser
+#   object, yyparser.  The C routines need to carry yyparser
+#   throughout the C parser; that easy: just let yyparser become an
+#   additional parse-param.  But because the C++ skeleton needs to
+#   know the "real" original parse-param, we save them
+#   (b4_parse_param_orig).  Note that b4_parse_param is overquoted
+#   (and c.m4 strips one level of quotes).  This is a PITA, and
+#   explains why there are so many levels of quotes.
+#
+# The locations
+#
+#   We use location.cc just like lalr1.cc, but because glr.c stores
+#   the locations in a (C++) union, the position and location classes
+#   must not have a constructor.  Therefore, contrary to lalr1.cc, we
+#   must not define "b4_location_constructors".  As a consequence the
+#   user must initialize the first positions (in particular the
+#   filename member).
+
+# We require a pure interface using locations.
+m4_define([b4_locations_flag], [1])
+m4_define([b4_pure_flag],      [1])
+
+# The header is mandatory.
+b4_defines_if([],
+              [b4_fatal([b4_skeleton[: using %%defines is mandatory]])])
+
+m4_include(b4_pkgdatadir/[c++.m4])
+m4_include(b4_pkgdatadir/[location.cc])
+
+m4_define([b4_parser_class_name],
+          [b4_percent_define_get([[parser_class_name]])])
+
+# Save the parse parameters.
+m4_define([b4_parse_param_orig], m4_defn([b4_parse_param]))
+
+
+# b4_yy_symbol_print_generate
+# ---------------------------
+# Bypass the default implementation to generate the "yy_symbol_print"
+# and "yy_symbol_value_print" functions.
+m4_define([b4_yy_symbol_print_generate],
+[[
+/*--------------------.
+| Print this symbol.  |
+`--------------------*/
+
+]b4_c_ansi_function_def([yy_symbol_print],
+    [static void],
+    [[FILE *],               []],
+    [[int yytype],           [yytype]],
+    [[const b4_namespace_ref::b4_parser_class_name::semantic_type *yyvaluep],
+			     [yyvaluep]],
+    [[const b4_namespace_ref::b4_parser_class_name::location_type *yylocationp],
+			     [yylocationp]],
+    b4_parse_param)[
+{
+]b4_parse_param_use[]dnl
+[  yyparser.yy_symbol_print_ (yytype, yyvaluep]b4_locations_if([, yylocationp])[);
+}
+]])
+
+
+# Declare yyerror.
+m4_append([b4_post_prologue],
+[b4_syncline([@oline@], [@ofile@])
+
+b4_c_ansi_function_decl([yyerror],
+    [static void],
+    [[b4_namespace_ref::b4_parser_class_name::location_type *yylocationp], [yylocationp]],
+    b4_parse_param,
+    [[const char* msg], [msg]])])
+
+
+# Define yyerror.
+m4_append([b4_epilogue],
+[b4_syncline([@oline@], [@ofile@])[
+/*------------------.
+| Report an error.  |
+`------------------*/
+
+]b4_c_ansi_function_def([yyerror],
+    [static void],
+    [[b4_namespace_ref::b4_parser_class_name::location_type *yylocationp], [yylocationp]],
+    b4_parse_param,
+    [[const char* msg], [msg]])[
+{
+]b4_parse_param_use[]dnl
+[  yyparser.error (*yylocationp, msg);
+}
+
+
+]b4_namespace_open[
+]dnl In this section, the parse param are the original parse_params.
+m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
+[  /// Build a parser object.
+  ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [
+    :])[
+#if YYDEBUG
+    ]m4_ifset([b4_parse_param], [  ], [ :])[yydebug_ (false),
+      yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[
+#endif]b4_parse_param_cons[
+  {
+  }
+
+  ]b4_parser_class_name::~b4_parser_class_name[ ()
+  {
+  }
+
+  int
+  ]b4_parser_class_name[::parse ()
+  {
+    return ::yyparse (*this]b4_user_args[);
+  }
+
+#if YYDEBUG
+  /*--------------------.
+  | Print this symbol.  |
+  `--------------------*/
+
+  inline void
+  ]b4_parser_class_name[::yy_symbol_value_print_ (int yytype,
+			   const semantic_type* yyvaluep, const location_type* yylocationp)
+  {
+    /* Pacify ``unused variable'' warnings.  */
+    YYUSE (yyvaluep);
+    YYUSE (yylocationp);
+    switch (yytype)
+      {
+  ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
+[        default:
+	  break;
+      }
+  }
+
+
+  void
+  ]b4_parser_class_name[::yy_symbol_print_ (int yytype,
+			   const semantic_type* yyvaluep, const location_type* yylocationp)
+  {
+    *yycdebug_ << (yytype < YYNTOKENS ? "token" : "nterm")
+	       << ' ' << yytname[yytype] << " ("
+	       << *yylocationp << ": ";
+    yy_symbol_value_print_ (yytype, yyvaluep, yylocationp);
+    *yycdebug_ << ')';
+  }
+
+  std::ostream&
+  ]b4_parser_class_name[::debug_stream () const
+  {
+    return *yycdebug_;
+  }
+
+  void
+  ]b4_parser_class_name[::set_debug_stream (std::ostream& o)
+  {
+    yycdebug_ = &o;
+  }
+
+
+  ]b4_parser_class_name[::debug_level_type
+  ]b4_parser_class_name[::debug_level () const
+  {
+    return yydebug_;
+  }
+
+  void
+  ]b4_parser_class_name[::set_debug_level (debug_level_type l)
+  {
+    yydebug_ = l;
+  }
+
+#endif
+]m4_popdef([b4_parse_param])dnl
+b4_namespace_close[
+
+]])
+
+
+# Let glr.c believe that the user arguments include the parser itself.
+m4_ifset([b4_parse_param],
+[m4_pushdef([b4_parse_param],
+	    m4_dquote([[[b4_namespace_ref::b4_parser_class_name& yyparser], [[yyparser]]],]
+m4_defn([b4_parse_param])))],
+[m4_pushdef([b4_parse_param],
+	    [[[[b4_namespace_ref::b4_parser_class_name& yyparser], [[yyparser]]]]])
+])
+m4_include(b4_pkgdatadir/[glr.c])
+m4_popdef([b4_parse_param])
+
+m4_divert_push(0)
+@output(b4_spec_defines_file@)@
+b4_copyright([Skeleton interface for Bison GLR parsers in C++],
+             [2002-2006, 2009-2010])[
+
+/* C++ GLR parser skeleton written by Akim Demaille.  */
+
+#ifndef PARSER_HEADER_H
+# define PARSER_HEADER_H
+
+]b4_percent_code_get([[requires]])[
+
+#include <string>
+#include <iostream>
+
+/* Using locations.  */
+#define YYLSP_NEEDED ]b4_locations_flag[
+
+]b4_namespace_open[
+  class position;
+  class location;
+]b4_namespace_close[
+
+#include "location.hh"
+
+/* Enabling traces.  */
+#ifndef YYDEBUG
+# define YYDEBUG ]b4_debug_flag[
+#endif
+
+/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
+   If N is 0, then set CURRENT to the empty location which ends
+   the previous symbol: RHS[0] (always defined).  */
+
+#ifndef YYLLOC_DEFAULT
+# define YYLLOC_DEFAULT(Current, Rhs, N)				\
+    do									\
+      if (N)								\
+	{								\
+	  (Current).begin  = YYRHSLOC (Rhs, 1).begin;			\
+	  (Current).end    = YYRHSLOC (Rhs, N).end;			\
+	}								\
+      else								\
+	{								\
+	  (Current).begin = (Current).end = YYRHSLOC (Rhs, 0).end;	\
+	}								\
+    while (/*CONSTCOND*/ 0)
+#endif
+
+]b4_namespace_open[
+  /// A Bison parser.
+  class ]b4_parser_class_name[
+  {
+  public:
+    /// Symbol semantic values.
+#ifndef YYSTYPE
+]m4_ifdef([b4_stype],
+[    union semantic_type
+    {
+b4_user_stype
+    };],
+[m4_if(b4_tag_seen_flag, 0,
+[[    typedef int semantic_type;]],
+[[    typedef YYSTYPE semantic_type;]])])[
+#else
+    typedef YYSTYPE semantic_type;
+#endif
+    /// Symbol locations.
+    typedef ]b4_percent_define_get([[location_type]])[ location_type;
+    /// Tokens.
+    struct token
+    {
+      ]b4_token_enums(b4_tokens)[
+    };
+    /// Token type.
+    typedef token::yytokentype token_type;
+
+    /// Build a parser object.
+    ]b4_parser_class_name[ (]b4_parse_param_decl[);
+    virtual ~]b4_parser_class_name[ ();
+
+    /// Parse.
+    /// \returns  0 iff parsing succeeded.
+    virtual int parse ();
+
+    /// The current debugging stream.
+    std::ostream& debug_stream () const;
+    /// Set the current debugging stream.
+    void set_debug_stream (std::ostream &);
+
+    /// Type for debugging levels.
+    typedef int debug_level_type;
+    /// The current debugging level.
+    debug_level_type debug_level () const;
+    /// Set the current debugging level.
+    void set_debug_level (debug_level_type l);
+
+  private:
+
+  public:
+    /// Report a syntax error.
+    /// \param loc    where the syntax error is found.
+    /// \param msg    a description of the syntax error.
+    virtual void error (const location_type& loc, const std::string& msg);
+  private:
+
+#if YYDEBUG
+  public:
+    /// \brief Report a symbol value on the debug stream.
+    /// \param yytype       The token type.
+    /// \param yyvaluep     Its semantic value.
+    /// \param yylocationp  Its location.
+    virtual void yy_symbol_value_print_ (int yytype,
+					 const semantic_type* yyvaluep,
+					 const location_type* yylocationp);
+    /// \brief Report a symbol on the debug stream.
+    /// \param yytype       The token type.
+    /// \param yyvaluep     Its semantic value.
+    /// \param yylocationp  Its location.
+    virtual void yy_symbol_print_ (int yytype,
+				   const semantic_type* yyvaluep,
+				   const location_type* yylocationp);
+  private:
+    /* Debugging.  */
+    int yydebug_;
+    std::ostream* yycdebug_;
+#endif
+
+
+    /// \brief Reclaim the memory associated to a symbol.
+    /// \param yymsg        Why this token is reclaimed.
+    /// \param yytype       The symbol type.
+    /// \param yyvaluep     Its semantic value.
+    /// \param yylocationp  Its location.
+    inline void yydestruct_ (const char* yymsg,
+			     int yytype,
+			     semantic_type* yyvaluep,
+			     location_type* yylocationp);
+
+]b4_parse_param_vars[
+  };
+
+]dnl Redirections for glr.c.
+b4_percent_define_flag_if([[global_tokens_and_yystype]],
+[b4_token_defines(b4_tokens)])
+[
+#ifndef YYSTYPE
+# define YYSTYPE ]b4_namespace_ref[::]b4_parser_class_name[::semantic_type
+#endif
+#ifndef YYLTYPE
+# define YYLTYPE ]b4_namespace_ref[::]b4_parser_class_name[::location_type
+#endif
+
+]b4_namespace_close[
+
+]b4_percent_code_get([[provides]])[]dnl
+
+[#endif /* ! defined PARSER_HEADER_H */]
+m4_divert_pop(0)

data/java-skel.m4

@@ -1,9 +1,7 @@
                                                             -*- Autoconf -*-
 
 # Java skeleton dispatching for Bison.
-
-# Copyright (C) 2007, 2009-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
+# Copyright (C) 2007, 2009-2010 Free Software Foundation, Inc.
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -16,12 +14,12 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 b4_glr_if(             [b4_complain([%%glr-parser not supported for Java])])
 b4_nondeterministic_if([b4_complain([%%nondeterministic-parser not supported for Java])])
 
-m4_define_default([b4_used_skeleton], [b4_skeletonsdir/[lalr1.java]])
+m4_define_default([b4_used_skeleton], [b4_pkgdatadir/[lalr1.java]])
 m4_define_default([b4_skeleton], ["b4_basename(b4_used_skeleton)"])
 
 m4_include(b4_used_skeleton)

data/java.m4

@@ -0,0 +1,303 @@
+                                                            -*- Autoconf -*-
+
+# Java language support for Bison
+
+# Copyright (C) 2007-2010 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+# b4_comment(TEXT)
+# ----------------
+m4_define([b4_comment], [/* m4_bpatsubst([$1], [
+], [
+   ])  */])
+
+
+# b4_list2(LIST1, LIST2)
+# --------------------------
+# Join two lists with a comma if necessary.
+m4_define([b4_list2],
+	  [$1[]m4_ifval(m4_quote($1), [m4_ifval(m4_quote($2), [[, ]])])[]$2])
+
+
+# b4_percent_define_get3(DEF, PRE, POST, NOT)
+# -------------------------------------------
+# Expand to the value of DEF surrounded by PRE and POST if it's %define'ed,
+# otherwise NOT.
+m4_define([b4_percent_define_get3],
+	  [m4_ifval(m4_quote(b4_percent_define_get([$1])),
+		[$2[]b4_percent_define_get([$1])[]$3], [$4])])
+
+
+
+# b4_flag_value(BOOLEAN-FLAG)
+# ---------------------------
+m4_define([b4_flag_value], [b4_flag_if([$1], [true], [false])])
+
+
+# b4_public_if(TRUE, FALSE)
+# -------------------------
+b4_percent_define_default([[public]], [[false]])
+m4_define([b4_public_if],
+[b4_percent_define_flag_if([public], [$1], [$2])])
+
+
+# b4_abstract_if(TRUE, FALSE)
+# ---------------------------
+b4_percent_define_default([[abstract]], [[false]])
+m4_define([b4_abstract_if],
+[b4_percent_define_flag_if([abstract], [$1], [$2])])
+
+
+# b4_final_if(TRUE, FALSE)
+# ---------------------------
+b4_percent_define_default([[final]], [[false]])
+m4_define([b4_final_if],
+[b4_percent_define_flag_if([final], [$1], [$2])])
+
+
+# b4_strictfp_if(TRUE, FALSE)
+# ---------------------------
+b4_percent_define_default([[strictfp]], [[false]])
+m4_define([b4_strictfp_if],
+[b4_percent_define_flag_if([strictfp], [$1], [$2])])
+
+
+# b4_lexer_if(TRUE, FALSE)
+# ------------------------
+m4_define([b4_lexer_if],
+[b4_percent_code_ifdef([[lexer]], [$1], [$2])])
+
+
+# b4_identification
+# -----------------
+m4_define([b4_identification],
+[  /** Version number for the Bison executable that generated this parser.  */
+  public static final String bisonVersion = "b4_version";
+
+  /** Name of the skeleton that generated this parser.  */
+  public static final String bisonSkeleton = b4_skeleton;
+])
+
+
+## ------------ ##
+## Data types.  ##
+## ------------ ##
+
+# b4_int_type(MIN, MAX)
+# ---------------------
+# Return the smallest int type able to handle numbers ranging from
+# MIN to MAX (included).
+m4_define([b4_int_type],
+[m4_if(b4_ints_in($@,   [-128],   [127]), [1], [byte],
+       b4_ints_in($@, [-32768], [32767]), [1], [short],
+					       [int])])
+
+# b4_int_type_for(NAME)
+# ---------------------
+# Return the smallest int type able to handle numbers ranging from
+# `NAME_min' to `NAME_max' (included).
+m4_define([b4_int_type_for],
+[b4_int_type($1_min, $1_max)])
+
+# b4_null
+# -------
+m4_define([b4_null], [null])
+
+
+## ------------------------- ##
+## Assigning token numbers.  ##
+## ------------------------- ##
+
+# b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
+# ---------------------------------------
+# Output the definition of this token as an enum.
+m4_define([b4_token_enum],
+[  /** Token number, to be returned by the scanner.  */
+  public static final int $1 = $2;
+])
+
+
+# b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
+# -----------------------------------------------------
+# Output the definition of the tokens (if there are) as enums.
+m4_define([b4_token_enums],
+[m4_if([$#$1], [1], [],
+[/* Tokens.  */
+m4_map([b4_token_enum], [$@])])
+])
+
+# b4-case(ID, CODE)
+# -----------------
+# We need to fool Java's stupid unreachable code detection.
+m4_define([b4_case], [  case $1:
+  if (yyn == $1)
+    $2;
+  break;
+    ])
+
+
+## ---------------- ##
+## Default values.  ##
+## ---------------- ##
+
+m4_define([b4_yystype], [b4_percent_define_get([[stype]])])
+b4_percent_define_default([[stype]], [[Object]])])
+
+# %name-prefix
+m4_define_default([b4_prefix], [[YY]])
+
+b4_percent_define_default([[parser_class_name]], [b4_prefix[]Parser])])
+m4_define([b4_parser_class_name], [b4_percent_define_get([[parser_class_name]])])
+
+b4_percent_define_default([[lex_throws]], [[java.io.IOException]])])
+m4_define([b4_lex_throws], [b4_percent_define_get([[lex_throws]])])
+
+b4_percent_define_default([[throws]], [])])
+m4_define([b4_throws], [b4_percent_define_get([[throws]])])
+
+b4_percent_define_default([[location_type]], [Location])])
+m4_define([b4_location_type], [b4_percent_define_get([[location_type]])])
+
+b4_percent_define_default([[position_type]], [Position])])
+m4_define([b4_position_type], [b4_percent_define_get([[position_type]])])
+
+
+## ----------------- ##
+## Semantic Values.  ##
+## ----------------- ##
+
+
+# b4_lhs_value([TYPE])
+# --------------------
+# Expansion of $<TYPE>$.
+m4_define([b4_lhs_value], [yyval])
+
+
+# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
+# --------------------------------------
+# Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
+# symbols on RHS.
+#
+# In this simple implementation, %token and %type have class names
+# between the angle brackets.
+m4_define([b4_rhs_value],
+[(m4_ifval($3, [($3)])[](yystack.valueAt ($1-($2))))])
+
+# b4_lhs_location()
+# -----------------
+# Expansion of @$.
+m4_define([b4_lhs_location],
+[(yyloc)])
+
+
+# b4_rhs_location(RULE-LENGTH, NUM)
+# ---------------------------------
+# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
+# on RHS.
+m4_define([b4_rhs_location],
+[yystack.locationAt ($1-($2))])
+
+
+# b4_lex_param
+# b4_parse_param
+# --------------
+# If defined, b4_lex_param arrives double quoted, but below we prefer
+# it to be single quoted.  Same for b4_parse_param.
+
+# TODO: should be in bison.m4
+m4_define_default([b4_lex_param], [[]]))
+m4_define([b4_lex_param], b4_lex_param))
+m4_define([b4_parse_param], b4_parse_param))
+
+# b4_lex_param_decl
+# -------------------
+# Extra formal arguments of the constructor.
+m4_define([b4_lex_param_decl],
+[m4_ifset([b4_lex_param],
+          [b4_remove_comma([$1],
+			   b4_param_decls(b4_lex_param))],
+	  [$1])])
+
+m4_define([b4_param_decls],
+	  [m4_map([b4_param_decl], [$@])])
+m4_define([b4_param_decl], [, $1])
+
+m4_define([b4_remove_comma], [m4_ifval(m4_quote($1), [$1, ], [])m4_shift2($@)])
+
+
+
+# b4_parse_param_decl
+# -------------------
+# Extra formal arguments of the constructor.
+m4_define([b4_parse_param_decl],
+[m4_ifset([b4_parse_param],
+          [b4_remove_comma([$1],
+			   b4_param_decls(b4_parse_param))],
+	  [$1])])
+
+
+
+# b4_lex_param_call
+# -------------------
+# Delegating the lexer parameters to the lexer constructor.
+m4_define([b4_lex_param_call],
+          [m4_ifset([b4_lex_param],
+	            [b4_remove_comma([$1],
+				     b4_param_calls(b4_lex_param))],
+	            [$1])])
+m4_define([b4_param_calls],
+	  [m4_map([b4_param_call], [$@])])
+m4_define([b4_param_call], [, $2])
+
+
+
+# b4_parse_param_cons
+# -------------------
+# Extra initialisations of the constructor.
+m4_define([b4_parse_param_cons],
+          [m4_ifset([b4_parse_param],
+		    [b4_constructor_calls(b4_parse_param)])])
+
+m4_define([b4_constructor_calls],
+	  [m4_map([b4_constructor_call], [$@])])
+m4_define([b4_constructor_call],
+	  [this.$2 = $2;
+	  ])
+
+
+
+# b4_parse_param_vars
+# -------------------
+# Extra instance variables.
+m4_define([b4_parse_param_vars],
+          [m4_ifset([b4_parse_param],
+		    [
+    /* User arguments.  */
+b4_var_decls(b4_parse_param)])])
+
+m4_define([b4_var_decls],
+	  [m4_map_sep([b4_var_decl], [
+], [$@])])
+m4_define([b4_var_decl],
+	  [    protected final $1;])
+
+
+
+# b4_maybe_throws(THROWS)
+# -----------------------
+# Expand to either an empty string or "throws THROWS".
+m4_define([b4_maybe_throws],
+	  [m4_ifval($1, [throws $1])])

data/lalr1.java

@@ -0,0 +1,881 @@
+# Java skeleton for Bison -*- autoconf -*-
+
+# Copyright (C) 2007-2010 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+m4_include(b4_pkgdatadir/[java.m4])
+
+b4_defines_if([b4_fatal([%s: %%defines does not make sense in Java], [b4_skeleton])])
+m4_ifval(m4_defn([b4_symbol_destructors]),
+        [b4_fatal([%s: %%destructor does not make sense in Java], [b4_skeleton])],
+        [])
+
+m4_divert_push(0)dnl
+@output(b4_parser_file_name@)@
+b4_copyright([Skeleton implementation for Bison LALR(1) parsers in Java],
+             [2007-2010])
+
+b4_percent_define_ifdef([package], [package b4_percent_define_get([package]);
+])[/* First part of user declarations.  */
+]b4_pre_prologue
+b4_percent_code_get([[imports]])
+[/**
+ * A Bison parser, automatically generated from <tt>]m4_bpatsubst(b4_file_name, [^"\(.*\)"$], [\1])[</tt>.
+ *
+ * @@author LALR (1) parser skeleton written by Paolo Bonzini.
+ */
+]b4_public_if([public ])dnl
+b4_abstract_if([abstract ])dnl
+b4_final_if([final ])dnl
+b4_strictfp_if([strictfp ])dnl
+[class ]b4_parser_class_name[]dnl
+b4_percent_define_get3([extends], [ extends ])dnl
+b4_percent_define_get3([implements], [ implements ])[
+{
+  ]b4_identification[
+
+  /** True if verbose error messages are enabled.  */
+  public boolean errorVerbose = ]b4_flag_value([error_verbose]);
+
+b4_locations_if([[
+  /**
+   * A class defining a pair of positions.  Positions, defined by the
+   * <code>]b4_position_type[</code> class, denote a point in the input.
+   * Locations represent a part of the input through the beginning
+   * and ending positions.  */
+  public class ]b4_location_type[ {
+    /** The first, inclusive, position in the range.  */
+    public ]b4_position_type[ begin;
+
+    /** The first position beyond the range.  */
+    public ]b4_position_type[ end;
+
+    /**
+     * Create a <code>]b4_location_type[</code> denoting an empty range located at
+     * a given point.
+     * @@param loc The position at which the range is anchored.  */
+    public ]b4_location_type[ (]b4_position_type[ loc) {
+      this.begin = this.end = loc;
+    }
+
+    /**
+     * Create a <code>]b4_location_type[</code> from the endpoints of the range.
+     * @@param begin The first position included in the range.
+     * @@param end   The first position beyond the range.  */
+    public ]b4_location_type[ (]b4_position_type[ begin, ]b4_position_type[ end) {
+      this.begin = begin;
+      this.end = end;
+    }
+
+    /**
+     * Print a representation of the location.  For this to be correct,
+     * <code>]b4_position_type[</code> should override the <code>equals</code>
+     * method.  */
+    public String toString () {
+      if (begin.equals (end))
+        return begin.toString ();
+      else
+        return begin.toString () + "-" + end.toString ();
+    }
+  }
+
+]])
+
+[  /** Token returned by the scanner to signal the end of its input.  */
+  public static final int EOF = 0;]
+
+b4_token_enums(b4_tokens)
+
+  b4_locations_if([[
+  private ]b4_location_type[ yylloc (YYStack rhs, int n)
+  {
+    if (n > 0)
+      return new ]b4_location_type[ (rhs.locationAt (1).begin, rhs.locationAt (n).end);
+    else
+      return new ]b4_location_type[ (rhs.locationAt (0).end);
+  }]])[
+
+  /**
+   * Communication interface between the scanner and the Bison-generated
+   * parser <tt>]b4_parser_class_name[</tt>.
+   */
+  public interface Lexer {
+    ]b4_locations_if([[/**
+     * Method to retrieve the beginning position of the last scanned token.
+     * @@return the position at which the last scanned token starts.  */
+    ]b4_position_type[ getStartPos ();
+
+    /**
+     * Method to retrieve the ending position of the last scanned token.
+     * @@return the first position beyond the last scanned token.  */
+    ]b4_position_type[ getEndPos ();]])[
+
+    /**
+     * Method to retrieve the semantic value of the last scanned token.
+     * @@return the semantic value of the last scanned token.  */
+    ]b4_yystype[ getLVal ();
+
+    /**
+     * Entry point for the scanner.  Returns the token identifier corresponding
+     * to the next token and prepares to return the semantic value
+     * ]b4_locations_if([and beginning/ending positions ])[of the token.
+     * @@return the token identifier corresponding to the next token. */
+    int yylex () ]b4_maybe_throws([b4_lex_throws])[;
+
+    /**
+     * Entry point for error reporting.  Emits an error
+     * ]b4_locations_if([referring to the given location ])[in a user-defined way.
+     *
+     * ]b4_locations_if([[@@param loc The location of the element to which the
+     *                error message is related]])[
+     * @@param s The string for the error message.  */
+     void yyerror (]b4_locations_if([b4_location_type[ loc, ]])[String s);]
+  }
+
+  b4_lexer_if([[private class YYLexer implements Lexer {
+]b4_percent_code_get([[lexer]])[
+  }
+
+  ]])[/** The object doing lexical analysis for us.  */
+  private Lexer yylexer;
+  ]
+  b4_parse_param_vars
+
+b4_lexer_if([[
+  /**
+   * Instantiates the Bison-generated parser.
+   */
+  public ]b4_parser_class_name (b4_parse_param_decl([b4_lex_param_decl])[) {
+    this.yylexer = new YYLexer(]b4_lex_param_call[);
+    ]b4_parse_param_cons[
+  }
+]])
+
+  /**
+   * Instantiates the Bison-generated parser.
+   * @@param yylexer The scanner that will supply tokens to the parser.
+   */
+  b4_lexer_if([[protected]], [[public]]) b4_parser_class_name[ (]b4_parse_param_decl([[Lexer yylexer]])[) {
+    this.yylexer = yylexer;
+    ]b4_parse_param_cons[
+  }
+
+  private java.io.PrintStream yyDebugStream = System.err;
+
+  /**
+   * Return the <tt>PrintStream</tt> on which the debugging output is
+   * printed.
+   */
+  public final java.io.PrintStream getDebugStream () { return yyDebugStream; }
+
+  /**
+   * Set the <tt>PrintStream</tt> on which the debug output is printed.
+   * @@param s The stream that is used for debugging output.
+   */
+  public final void setDebugStream(java.io.PrintStream s) { yyDebugStream = s; }
+
+  private int yydebug = 0;
+
+  /**
+   * Answer the verbosity of the debugging output; 0 means that all kinds of
+   * output from the parser are suppressed.
+   */
+  public final int getDebugLevel() { return yydebug; }
+
+  /**
+   * Set the verbosity of the debugging output; 0 means that all kinds of
+   * output from the parser are suppressed.
+   * @@param level The verbosity level for debugging output.
+   */
+  public final void setDebugLevel(int level) { yydebug = level; }
+
+  private final int yylex () ]b4_maybe_throws([b4_lex_throws]) [{
+    return yylexer.yylex ();
+  }
+  protected final void yyerror (]b4_locations_if([b4_location_type[ loc, ]])[String s) {
+    yylexer.yyerror (]b4_locations_if([loc, ])[s);
+  }
+
+  ]b4_locations_if([
+  protected final void yyerror (String s) {
+    yylexer.yyerror ((]b4_location_type[)null, s);
+  }
+  protected final void yyerror (]b4_position_type[ loc, String s) {
+    yylexer.yyerror (new ]b4_location_type[ (loc), s);
+  }])
+
+  [protected final void yycdebug (String s) {
+    if (yydebug > 0)
+      yyDebugStream.println (s);
+  }
+
+  private final class YYStack {
+    private int[] stateStack = new int[16];
+    ]b4_locations_if([[private ]b4_location_type[[] locStack = new ]b4_location_type[[16];]])[
+    private ]b4_yystype[[] valueStack = new ]b4_yystype[[16];
+
+    public int size = 16;
+    public int height = -1;
+
+    public final void push (int state, ]b4_yystype[ value]dnl
+			    b4_locations_if([, ]b4_location_type[ loc])[) {
+      height++;
+      if (size == height)
+        {
+	  int[] newStateStack = new int[size * 2];
+	  System.arraycopy (stateStack, 0, newStateStack, 0, height);
+	  stateStack = newStateStack;
+	  ]b4_locations_if([[
+	  ]b4_location_type[[] newLocStack = new ]b4_location_type[[size * 2];
+	  System.arraycopy (locStack, 0, newLocStack, 0, height);
+	  locStack = newLocStack;]])
+
+	  b4_yystype[[] newValueStack = new ]b4_yystype[[size * 2];
+	  System.arraycopy (valueStack, 0, newValueStack, 0, height);
+	  valueStack = newValueStack;
+
+	  size *= 2;
+	}
+
+      stateStack[height] = state;
+      ]b4_locations_if([[locStack[height] = loc;]])[
+      valueStack[height] = value;
+    }
+
+    public final void pop () {
+      height--;
+    }
+
+    public final void pop (int num) {
+      // Avoid memory leaks... garbage collection is a white lie!
+      if (num > 0) {
+	java.util.Arrays.fill (valueStack, height - num + 1, height, null);
+        ]b4_locations_if([[java.util.Arrays.fill (locStack, height - num + 1, height, null);]])[
+      }
+      height -= num;
+    }
+
+    public final int stateAt (int i) {
+      return stateStack[height - i];
+    }
+
+    ]b4_locations_if([[public final ]b4_location_type[ locationAt (int i) {
+      return locStack[height - i];
+    }
+
+    ]])[public final ]b4_yystype[ valueAt (int i) {
+      return valueStack[height - i];
+    }
+
+    // Print the state stack on the debug stream.
+    public void print (java.io.PrintStream out)
+    {
+      out.print ("Stack now");
+
+      for (int i = 0; i < height; i++)
+        {
+	  out.print (' ');
+	  out.print (stateStack[i]);
+        }
+      out.println ();
+    }
+  }
+
+  /**
+   * Returned by a Bison action in order to stop the parsing process and
+   * return success (<tt>true</tt>).  */
+  public static final int YYACCEPT = 0;
+
+  /**
+   * Returned by a Bison action in order to stop the parsing process and
+   * return failure (<tt>false</tt>).  */
+  public static final int YYABORT = 1;
+
+  /**
+   * Returned by a Bison action in order to start error recovery without
+   * printing an error message.  */
+  public static final int YYERROR = 2;
+
+  /**
+   * Returned by a Bison action in order to print an error message and start
+   * error recovery.  Formally deprecated in Bison 2.4.2's NEWS entry, where
+   * a plan to phase it out is discussed.  */
+  public static final int YYFAIL = 3;
+
+  private static final int YYNEWSTATE = 4;
+  private static final int YYDEFAULT = 5;
+  private static final int YYREDUCE = 6;
+  private static final int YYERRLAB1 = 7;
+  private static final int YYRETURN = 8;
+
+  private int yyerrstatus_ = 0;
+
+  /**
+   * Return whether error recovery is being done.  In this state, the parser
+   * reads token until it reaches a known state, and then restarts normal
+   * operation.  */
+  public final boolean recovering ()
+  {
+    return yyerrstatus_ == 0;
+  }
+
+  private int yyaction (int yyn, YYStack yystack, int yylen) ]b4_maybe_throws([b4_throws])[
+  {
+    ]b4_yystype[ yyval;
+    ]b4_locations_if([b4_location_type[ yyloc = yylloc (yystack, yylen);]])[
+
+    /* If YYLEN is nonzero, implement the default value of the action:
+       `$$ = $1'.  Otherwise, use the top of the stack.
+
+       Otherwise, the following line sets YYVAL to garbage.
+       This behavior is undocumented and Bison
+       users should not rely upon it.  */
+    if (yylen > 0)
+      yyval = yystack.valueAt (yylen - 1);
+    else
+      yyval = yystack.valueAt (0);
+
+    yy_reduce_print (yyn, yystack);
+
+    switch (yyn)
+      {
+	]b4_user_actions[
+	default: break;
+      }
+
+    yy_symbol_print ("-> $$ =", yyr1_[yyn], yyval]b4_locations_if([, yyloc])[);
+
+    yystack.pop (yylen);
+    yylen = 0;
+
+    /* Shift the result of the reduction.  */
+    yyn = yyr1_[yyn];
+    int yystate = yypgoto_[yyn - yyntokens_] + yystack.stateAt (0);
+    if (0 <= yystate && yystate <= yylast_
+	&& yycheck_[yystate] == yystack.stateAt (0))
+      yystate = yytable_[yystate];
+    else
+      yystate = yydefgoto_[yyn - yyntokens_];
+
+    yystack.push (yystate, yyval]b4_locations_if([, yyloc])[);
+    return YYNEWSTATE;
+  }
+
+  /* Return YYSTR after stripping away unnecessary quotes and
+     backslashes, so that it's suitable for yyerror.  The heuristic is
+     that double-quoting is unnecessary unless the string contains an
+     apostrophe, a comma, or backslash (other than backslash-backslash).
+     YYSTR is taken from yytname.  */
+  private final String yytnamerr_ (String yystr)
+  {
+    if (yystr.charAt (0) == '"')
+      {
+        StringBuffer yyr = new StringBuffer ();
+        strip_quotes: for (int i = 1; i < yystr.length (); i++)
+          switch (yystr.charAt (i))
+            {
+            case '\'':
+            case ',':
+              break strip_quotes;
+
+            case '\\':
+	      if (yystr.charAt(++i) != '\\')
+                break strip_quotes;
+              /* Fall through.  */
+            default:
+              yyr.append (yystr.charAt (i));
+              break;
+
+            case '"':
+              return yyr.toString ();
+            }
+      }
+    else if (yystr.equals ("$end"))
+      return "end of input";
+
+    return yystr;
+  }
+
+  /*--------------------------------.
+  | Print this symbol on YYOUTPUT.  |
+  `--------------------------------*/
+
+  private void yy_symbol_print (String s, int yytype,
+			         ]b4_yystype[ yyvaluep]dnl
+				 b4_locations_if([, Object yylocationp])[)
+  {
+    if (yydebug > 0)
+    yycdebug (s + (yytype < yyntokens_ ? " token " : " nterm ")
+	      + yytname_[yytype] + " ("]b4_locations_if([
+	      + yylocationp + ": "])[
+	      + (yyvaluep == null ? "(null)" : yyvaluep.toString ()) + ")");
+  }
+
+  /**
+   * Parse input from the scanner that was specified at object construction
+   * time.  Return whether the end of the input was reached successfully.
+   *
+   * @@return <tt>true</tt> if the parsing succeeds.  Note that this does not
+   *          imply that there were no syntax errors.
+   */
+  public boolean parse () ]b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])[
+  {
+    /// Lookahead and lookahead in internal form.
+    int yychar = yyempty_;
+    int yytoken = 0;
+
+    /* State.  */
+    int yyn = 0;
+    int yylen = 0;
+    int yystate = 0;
+
+    YYStack yystack = new YYStack ();
+
+    /* Error handling.  */
+    int yynerrs_ = 0;
+    ]b4_locations_if([/// The location where the error started.
+    ]b4_location_type[ yyerrloc = null;
+
+    /// ]b4_location_type[ of the lookahead.
+    ]b4_location_type[ yylloc = new ]b4_location_type[ (null, null);
+
+    /// @@$.
+    ]b4_location_type[ yyloc;])
+
+    /// Semantic value of the lookahead.
+    b4_yystype[ yylval = null;
+
+    int yyresult;
+
+    yycdebug ("Starting parse\n");
+    yyerrstatus_ = 0;
+
+]m4_ifdef([b4_initial_action], [
+m4_pushdef([b4_at_dollar],     [yylloc])dnl
+m4_pushdef([b4_dollar_dollar], [yylval])dnl
+    /* User initialization code.  */
+    b4_user_initial_action
+m4_popdef([b4_dollar_dollar])dnl
+m4_popdef([b4_at_dollar])])dnl
+
+  [  /* Initialize the stack.  */
+    yystack.push (yystate, yylval]b4_locations_if([, yylloc])[);
+
+    int label = YYNEWSTATE;
+    for (;;)
+      switch (label)
+      {
+        /* New state.  Unlike in the C/C++ skeletons, the state is already
+	   pushed when we come here.  */
+      case YYNEWSTATE:
+        yycdebug ("Entering state " + yystate + "\n");
+        if (yydebug > 0)
+          yystack.print (yyDebugStream);
+
+        /* Accept?  */
+        if (yystate == yyfinal_)
+          return true;
+
+        /* Take a decision.  First try without lookahead.  */
+        yyn = yypact_[yystate];
+        if (yyn == yypact_ninf_)
+          {
+            label = YYDEFAULT;
+	    break;
+          }
+
+        /* Read a lookahead token.  */
+        if (yychar == yyempty_)
+          {
+	    yycdebug ("Reading a token: ");
+	    yychar = yylex ();]
+            b4_locations_if([[
+	    yylloc = new ]b4_location_type[(yylexer.getStartPos (),
+				            yylexer.getEndPos ());]])
+            yylval = yylexer.getLVal ();[
+          }
+
+        /* Convert token to internal form.  */
+        if (yychar <= EOF)
+          {
+	    yychar = yytoken = EOF;
+	    yycdebug ("Now at end of input.\n");
+          }
+        else
+          {
+	    yytoken = yytranslate_ (yychar);
+	    yy_symbol_print ("Next token is", yytoken,
+			     yylval]b4_locations_if([, yylloc])[);
+          }
+
+        /* If the proper action on seeing token YYTOKEN is to reduce or to
+           detect an error, take that action.  */
+        yyn += yytoken;
+        if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yytoken)
+          label = YYDEFAULT;
+
+        /* <= 0 means reduce or error.  */
+        else if ((yyn = yytable_[yyn]) <= 0)
+          {
+	    if (yyn == 0 || yyn == yytable_ninf_)
+	      label = YYFAIL;
+	    else
+	      {
+	        yyn = -yyn;
+	        label = YYREDUCE;
+	      }
+          }
+
+        else
+          {
+            /* Shift the lookahead token.  */
+	    yy_symbol_print ("Shifting", yytoken,
+			     yylval]b4_locations_if([, yylloc])[);
+
+            /* Discard the token being shifted.  */
+            yychar = yyempty_;
+
+            /* Count tokens shifted since error; after three, turn off error
+               status.  */
+            if (yyerrstatus_ > 0)
+              --yyerrstatus_;
+
+            yystate = yyn;
+            yystack.push (yystate, yylval]b4_locations_if([, yylloc])[);
+            label = YYNEWSTATE;
+          }
+        break;
+
+      /*-----------------------------------------------------------.
+      | yydefault -- do the default action for the current state.  |
+      `-----------------------------------------------------------*/
+      case YYDEFAULT:
+        yyn = yydefact_[yystate];
+        if (yyn == 0)
+          label = YYFAIL;
+        else
+          label = YYREDUCE;
+        break;
+
+      /*-----------------------------.
+      | yyreduce -- Do a reduction.  |
+      `-----------------------------*/
+      case YYREDUCE:
+        yylen = yyr2_[yyn];
+        label = yyaction (yyn, yystack, yylen);
+	yystate = yystack.stateAt (0);
+        break;
+
+      /*------------------------------------.
+      | yyerrlab -- here on detecting error |
+      `------------------------------------*/
+      case YYFAIL:
+        /* If not already recovering from an error, report this error.  */
+        if (yyerrstatus_ == 0)
+          {
+	    ++yynerrs_;
+	    yyerror (]b4_locations_if([yylloc, ])[yysyntax_error (yystate, yytoken));
+          }
+
+        ]b4_locations_if([yyerrloc = yylloc;])[
+        if (yyerrstatus_ == 3)
+          {
+	    /* If just tried and failed to reuse lookahead token after an
+	     error, discard it.  */
+
+	    if (yychar <= EOF)
+	      {
+	      /* Return failure if at end of input.  */
+	      if (yychar == EOF)
+	        return false;
+	      }
+	    else
+	      yychar = yyempty_;
+          }
+
+        /* Else will try to reuse lookahead token after shifting the error
+           token.  */
+        label = YYERRLAB1;
+        break;
+
+      /*---------------------------------------------------.
+      | errorlab -- error raised explicitly by YYERROR.  |
+      `---------------------------------------------------*/
+      case YYERROR:
+
+        ]b4_locations_if([yyerrloc = yystack.locationAt (yylen - 1);])[
+        /* Do not reclaim the symbols of the rule which action triggered
+           this YYERROR.  */
+        yystack.pop (yylen);
+        yylen = 0;
+        yystate = yystack.stateAt (0);
+        label = YYERRLAB1;
+        break;
+
+      /*-------------------------------------------------------------.
+      | yyerrlab1 -- common code for both syntax error and YYERROR.  |
+      `-------------------------------------------------------------*/
+      case YYERRLAB1:
+        yyerrstatus_ = 3;	/* Each real token shifted decrements this.  */
+
+        for (;;)
+          {
+	    yyn = yypact_[yystate];
+	    if (yyn != yypact_ninf_)
+	      {
+	        yyn += yyterror_;
+	        if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_)
+	          {
+	            yyn = yytable_[yyn];
+	            if (0 < yyn)
+		      break;
+	          }
+	      }
+
+	    /* Pop the current state because it cannot handle the error token.  */
+	    if (yystack.height == 1)
+	      return false;
+
+	    ]b4_locations_if([yyerrloc = yystack.locationAt (0);])[
+	    yystack.pop ();
+	    yystate = yystack.stateAt (0);
+	    if (yydebug > 0)
+	      yystack.print (yyDebugStream);
+          }
+
+	]b4_locations_if([
+	/* Muck with the stack to setup for yylloc.  */
+	yystack.push (0, null, yylloc);
+	yystack.push (0, null, yyerrloc);
+        yyloc = yylloc (yystack, 2);
+	yystack.pop (2);])[
+
+        /* Shift the error token.  */
+        yy_symbol_print ("Shifting", yystos_[yyn],
+			 yylval]b4_locations_if([, yyloc])[);
+
+        yystate = yyn;
+	yystack.push (yyn, yylval]b4_locations_if([, yyloc])[);
+        label = YYNEWSTATE;
+        break;
+
+        /* Accept.  */
+      case YYACCEPT:
+        return true;
+
+        /* Abort.  */
+      case YYABORT:
+        return false;
+      }
+  }
+
+  // Generate an error message.
+  private String yysyntax_error (int yystate, int tok)
+  {
+    if (errorVerbose)
+      {
+        int yyn = yypact_[yystate];
+        if (yypact_ninf_ < yyn && yyn <= yylast_)
+          {
+	    StringBuffer res;
+
+	    /* Start YYX at -YYN if negative to avoid negative indexes in
+	       YYCHECK.  */
+	    int yyxbegin = yyn < 0 ? -yyn : 0;
+
+	    /* Stay within bounds of both yycheck and yytname.  */
+	    int yychecklim = yylast_ - yyn + 1;
+	    int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
+	    int count = 0;
+	    for (int x = yyxbegin; x < yyxend; ++x)
+	      if (yycheck_[x + yyn] == x && x != yyterror_)
+	        ++count;
+
+	    // FIXME: This method of building the message is not compatible
+	    // with internationalization.
+	    res = new StringBuffer ("syntax error, unexpected ");
+	    res.append (yytnamerr_ (yytname_[tok]));
+	    if (count < 5)
+	      {
+	        count = 0;
+	        for (int x = yyxbegin; x < yyxend; ++x)
+	          if (yycheck_[x + yyn] == x && x != yyterror_)
+		    {
+		      res.append (count++ == 0 ? ", expecting " : " or ");
+		      res.append (yytnamerr_ (yytname_[x]));
+		    }
+	      }
+	    return res.toString ();
+          }
+      }
+
+    return "syntax error";
+  }
+
+
+  /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
+     STATE-NUM.  */
+  private static final ]b4_int_type_for([b4_pact])[ yypact_ninf_ = ]b4_pact_ninf[;
+  private static final ]b4_int_type_for([b4_pact])[ yypact_[] =
+  {
+    ]b4_pact[
+  };
+
+  /* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE
+     doesn't specify something else to do.  Zero means the default is an
+     error.  */
+  private static final ]b4_int_type_for([b4_defact])[ yydefact_[] =
+  {
+    ]b4_defact[
+  };
+
+  /* YYPGOTO[NTERM-NUM].  */
+  private static final ]b4_int_type_for([b4_pgoto])[ yypgoto_[] =
+  {
+    ]b4_pgoto[
+  };
+
+  /* YYDEFGOTO[NTERM-NUM].  */
+  private static final ]b4_int_type_for([b4_defgoto])[
+  yydefgoto_[] =
+  {
+    ]b4_defgoto[
+  };
+
+  /* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
+     positive, shift that token.  If negative, reduce the rule which
+     number is the opposite.  If zero, do what YYDEFACT says.  */
+  private static final ]b4_int_type_for([b4_table])[ yytable_ninf_ = ]b4_table_ninf[;
+  private static final ]b4_int_type_for([b4_table])[
+  yytable_[] =
+  {
+    ]b4_table[
+  };
+
+  /* YYCHECK.  */
+  private static final ]b4_int_type_for([b4_check])[
+  yycheck_[] =
+  {
+    ]b4_check[
+  };
+
+  /* STOS_[STATE-NUM] -- The (internal number of the) accessing
+     symbol of state STATE-NUM.  */
+  private static final ]b4_int_type_for([b4_stos])[
+  yystos_[] =
+  {
+    ]b4_stos[
+  };
+
+  /* TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding
+     to YYLEX-NUM.  */
+  private static final ]b4_int_type_for([b4_toknum])[
+  yytoken_number_[] =
+  {
+    ]b4_toknum[
+  };
+
+  /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
+  private static final ]b4_int_type_for([b4_r1])[
+  yyr1_[] =
+  {
+    ]b4_r1[
+  };
+
+  /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
+  private static final ]b4_int_type_for([b4_r2])[
+  yyr2_[] =
+  {
+    ]b4_r2[
+  };
+
+  /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
+     First, the terminals, then, starting at \a yyntokens_, nonterminals.  */
+  private static final String yytname_[] =
+  {
+    ]b4_tname[
+  };
+
+  /* YYRHS -- A `-1'-separated list of the rules' RHS.  */
+  private static final ]b4_int_type_for([b4_rhs])[ yyrhs_[] =
+  {
+    ]b4_rhs[
+  };
+
+  /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
+     YYRHS.  */
+  private static final ]b4_int_type_for([b4_prhs])[ yyprhs_[] =
+  {
+    ]b4_prhs[
+  };
+
+  /* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
+  private static final ]b4_int_type_for([b4_rline])[ yyrline_[] =
+  {
+    ]b4_rline[
+  };
+
+  // Report on the debug stream that the rule yyrule is going to be reduced.
+  private void yy_reduce_print (int yyrule, YYStack yystack)
+  {
+    if (yydebug == 0)
+      return;
+
+    int yylno = yyrline_[yyrule];
+    int yynrhs = yyr2_[yyrule];
+    /* Print the symbols being reduced, and their result.  */
+    yycdebug ("Reducing stack by rule " + (yyrule - 1)
+	      + " (line " + yylno + "), ");
+
+    /* The symbols being reduced.  */
+    for (int yyi = 0; yyi < yynrhs; yyi++)
+      yy_symbol_print ("   $" + (yyi + 1) + " =",
+		       yyrhs_[yyprhs_[yyrule] + yyi],
+		       ]b4_rhs_value(yynrhs, yyi + 1)b4_locations_if([,
+		       b4_rhs_location(yynrhs, yyi + 1)])[);
+  }
+
+  /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
+  private static final ]b4_int_type_for([b4_translate])[ yytranslate_table_[] =
+  {
+    ]b4_translate[
+  };
+
+  private static final ]b4_int_type_for([b4_translate])[ yytranslate_ (int t)
+  {
+    if (t >= 0 && t <= yyuser_token_number_max_)
+      return yytranslate_table_[t];
+    else
+      return yyundef_token_;
+  }
+
+  private static final int yylast_ = ]b4_last[;
+  private static final int yynnts_ = ]b4_nterms_number[;
+  private static final int yyempty_ = -2;
+  private static final int yyfinal_ = ]b4_final_state_number[;
+  private static final int yyterror_ = 1;
+  private static final int yyerrcode_ = 256;
+  private static final int yyntokens_ = ]b4_tokens_number[;
+
+  private static final int yyuser_token_number_max_ = ]b4_user_token_number_max[;
+  private static final int yyundef_token_ = ]b4_undef_token_number[;
+
+]/* User implementation code.  */
+b4_percent_code_get[]dnl
+
+}
+
+b4_epilogue
+m4_divert_pop(0)dnl

data/local.mk

@@ -1,58 +0,0 @@
-## Copyright (C) 2002, 2005-2015, 2018-2022, 2025-2026 Free Software
-## Foundation, Inc.
-
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 3 of the License, or
-## (at your option) any later version.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-dist_pkgdata_DATA =                             \
-  data/README.md                                \
-  data/bison-default.css
-
-skeletonsdir = $(pkgdatadir)/skeletons
-dist_skeletons_DATA =                           \
-  data/skeletons/bison.m4                       \
-  data/skeletons/c++-skel.m4                    \
-  data/skeletons/c++.m4                         \
-  data/skeletons/c-like.m4                      \
-  data/skeletons/c-skel.m4                      \
-  data/skeletons/c.m4                           \
-  data/skeletons/glr.c                          \
-  data/skeletons/glr.cc                         \
-  data/skeletons/glr2.cc                        \
-  data/skeletons/java-skel.m4                   \
-  data/skeletons/java.m4                        \
-  data/skeletons/lalr1.cc                       \
-  data/skeletons/lalr1.java                     \
-  data/skeletons/location.cc                    \
-  data/skeletons/stack.hh                       \
-  data/skeletons/traceon.m4                     \
-  data/skeletons/variant.hh                     \
-  data/skeletons/yacc.c
-
-# Experimental support for the D language.
-dist_skeletons_DATA +=                          \
-  data/skeletons/d-skel.m4                      \
-  data/skeletons/d.m4                           \
-  data/skeletons/lalr1.d
-
-m4sugardir = $(pkgdatadir)/m4sugar
-dist_m4sugar_DATA =                             \
-  data/m4sugar/foreach.m4                       \
-  data/m4sugar/m4sugar.m4
-
-xsltdir = $(pkgdatadir)/xslt
-dist_xslt_DATA =                                \
-  data/xslt/bison.xsl                           \
-  data/xslt/xml2dot.xsl                         \
-  data/xslt/xml2text.xsl                        \
-  data/xslt/xml2xhtml.xsl

data/location.cc

@@ -0,0 +1,275 @@
+# C++ skeleton for Bison
+
+# Copyright (C) 2002-2007, 2009-2010 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# We do want M4 expansion after # for CPP macros.
+m4_changecom()
+m4_divert_push(0)dnl
+@output(b4_dir_prefix[]position.hh@)@
+b4_copyright([Positions for Bison parsers in C++],
+             [2002-2007, 2009-2010])[
+
+/**
+ ** \file position.hh
+ ** Define the ]b4_namespace_ref[::position class.
+ */
+
+#ifndef BISON_POSITION_HH
+# define BISON_POSITION_HH
+
+# include <iostream>
+# include <string>
+# include <algorithm>
+
+]b4_namespace_open[
+  /// Abstract a position.
+  class position
+  {
+  public:
+]m4_ifdef([b4_location_constructors], [
+    /// Construct a position.
+    position ()
+      : filename (0), line (]b4_location_initial_line[), column (]b4_location_initial_column[)
+    {
+    }
+
+])[
+    /// Initialization.
+    inline void initialize (]b4_percent_define_get([[filename_type]])[* fn)
+    {
+      filename = fn;
+      line = ]b4_location_initial_line[;
+      column = ]b4_location_initial_column[;
+    }
+
+    /** \name Line and Column related manipulators
+     ** \{ */
+  public:
+    /// (line related) Advance to the COUNT next lines.
+    inline void lines (int count = 1)
+    {
+      column = ]b4_location_initial_column[;
+      line += count;
+    }
+
+    /// (column related) Advance to the COUNT next columns.
+    inline void columns (int count = 1)
+    {
+      column = std::max (]b4_location_initial_column[u, column + count);
+    }
+    /** \} */
+
+  public:
+    /// File name to which this position refers.
+    ]b4_percent_define_get([[filename_type]])[* filename;
+    /// Current line number.
+    unsigned int line;
+    /// Current column number.
+    unsigned int column;
+  };
+
+  /// Add and assign a position.
+  inline const position&
+  operator+= (position& res, const int width)
+  {
+    res.columns (width);
+    return res;
+  }
+
+  /// Add two position objects.
+  inline const position
+  operator+ (const position& begin, const int width)
+  {
+    position res = begin;
+    return res += width;
+  }
+
+  /// Add and assign a position.
+  inline const position&
+  operator-= (position& res, const int width)
+  {
+    return res += -width;
+  }
+
+  /// Add two position objects.
+  inline const position
+  operator- (const position& begin, const int width)
+  {
+    return begin + -width;
+  }
+]b4_percent_define_flag_if([[define_location_comparison]], [[
+  /// Compare two position objects.
+  inline bool
+  operator== (const position& pos1, const position& pos2)
+  {
+    return (pos1.line == pos2.line
+            && pos1.column == pos2.column
+            && (pos1.filename == pos2.filename
+                || (pos1.filename && pos2.filename
+                    && *pos1.filename == *pos2.filename)));
+  }
+
+  /// Compare two position objects.
+  inline bool
+  operator!= (const position& pos1, const position& pos2)
+  {
+    return !(pos1 == pos2);
+  }
+]])[
+  /** \brief Intercept output stream redirection.
+   ** \param ostr the destination output stream
+   ** \param pos a reference to the position to redirect
+   */
+  inline std::ostream&
+  operator<< (std::ostream& ostr, const position& pos)
+  {
+    if (pos.filename)
+      ostr << *pos.filename << ':';
+    return ostr << pos.line << '.' << pos.column;
+  }
+
+]b4_namespace_close[
+#endif // not BISON_POSITION_HH]
+@output(b4_dir_prefix[]location.hh@)@
+b4_copyright([Locations for Bison parsers in C++],
+             [2002-2007, 2009-2010])[
+
+/**
+ ** \file location.hh
+ ** Define the ]b4_namespace_ref[::location class.
+ */
+
+#ifndef BISON_LOCATION_HH
+# define BISON_LOCATION_HH
+
+# include <iostream>
+# include <string>
+# include "position.hh"
+
+]b4_namespace_open[
+
+  /// Abstract a location.
+  class location
+  {
+  public:
+]m4_ifdef([b4_location_constructors], [
+    /// Construct a location.
+    location ()
+      : begin (), end ()
+    {
+    }
+
+])[
+    /// Initialization.
+    inline void initialize (]b4_percent_define_get([[filename_type]])[* fn)
+    {
+      begin.initialize (fn);
+      end = begin;
+    }
+
+    /** \name Line and Column related manipulators
+     ** \{ */
+  public:
+    /// Reset initial location to final location.
+    inline void step ()
+    {
+      begin = end;
+    }
+
+    /// Extend the current location to the COUNT next columns.
+    inline void columns (unsigned int count = 1)
+    {
+      end += count;
+    }
+
+    /// Extend the current location to the COUNT next lines.
+    inline void lines (unsigned int count = 1)
+    {
+      end.lines (count);
+    }
+    /** \} */
+
+
+  public:
+    /// Beginning of the located region.
+    position begin;
+    /// End of the located region.
+    position end;
+  };
+
+  /// Join two location objects to create a location.
+  inline const location operator+ (const location& begin, const location& end)
+  {
+    location res = begin;
+    res.end = end.end;
+    return res;
+  }
+
+  /// Add two location objects.
+  inline const location operator+ (const location& begin, unsigned int width)
+  {
+    location res = begin;
+    res.columns (width);
+    return res;
+  }
+
+  /// Add and assign a location.
+  inline location& operator+= (location& res, unsigned int width)
+  {
+    res.columns (width);
+    return res;
+  }
+]b4_percent_define_flag_if([[define_location_comparison]], [[
+  /// Compare two location objects.
+  inline bool
+  operator== (const location& loc1, const location& loc2)
+  {
+    return loc1.begin == loc2.begin && loc1.end == loc2.end;
+  }
+
+  /// Compare two location objects.
+  inline bool
+  operator!= (const location& loc1, const location& loc2)
+  {
+    return !(loc1 == loc2);
+  }
+]])[
+  /** \brief Intercept output stream redirection.
+   ** \param ostr the destination output stream
+   ** \param loc a reference to the location to redirect
+   **
+   ** Avoid duplicate information.
+   */
+  inline std::ostream& operator<< (std::ostream& ostr, const location& loc)
+  {
+    position last = loc.end - 1;
+    ostr << loc.begin;
+    if (last.filename
+	&& (!loc.begin.filename
+	    || *loc.begin.filename != *last.filename))
+      ostr << '-' << last;
+    else if (loc.begin.line != last.line)
+      ostr << '-' << last.line  << '.' << last.column;
+    else if (loc.begin.column != last.column)
+      ostr << '-' << last.column;
+    return ostr;
+  }
+
+]b4_namespace_close[
+
+#endif // not BISON_LOCATION_HH]
+m4_divert_pop(0)
+m4_changecom([#])

data/m4sugar/foreach.m4

@@ -1 +0,0 @@
-../../submodules/autoconf/lib/m4sugar/foreach.m4

data/m4sugar/foreach.m4

@@ -0,0 +1,400 @@
+#                                                  -*- Autoconf -*-
+# This file is part of Autoconf.
+# foreach-based replacements for recursive functions.
+# Speeds up GNU M4 1.4.x by avoiding quadratic $@ recursion, but penalizes
+# GNU M4 1.6 by requiring more memory and macro expansions.
+#
+# Copyright (C) 2008 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception, the Free Software Foundation gives unlimited
+# permission to copy, distribute and modify the configure scripts that
+# are the output of Autoconf.  You need not follow the terms of the GNU
+# General Public License when using or distributing such scripts, even
+# though portions of the text of Autoconf appear in them.  The GNU
+# General Public License (GPL) does govern all other use of the material
+# that constitutes the Autoconf program.
+#
+# Certain portions of the Autoconf source text are designed to be copied
+# (in certain cases, depending on the input) into the output of
+# Autoconf.  We call these the "data" portions.  The rest of the Autoconf
+# source text consists of comments plus executable code that decides which
+# of the data portions to output in any given case.  We call these
+# comments and executable code the "non-data" portions.  Autoconf never
+# copies any of the non-data portions into its output.
+#
+# This special exception to the GPL applies to versions of Autoconf
+# released by the Free Software Foundation.  When you make and
+# distribute a modified version of Autoconf, you may extend this special
+# exception to the GPL to apply to your modified version as well, *unless*
+# your modified version has the potential to copy into its output some
+# of the text that was the non-data portion of the version that you started
+# with.  (In other words, unless your change moves or copies text from
+# the non-data portions to the data portions.)  If your modification has
+# such potential, you must delete any notice of this special exception
+# to the GPL from your modified version.
+#
+# Written by Eric Blake.
+#
+
+# In M4 1.4.x, every byte of $@ is rescanned.  This means that an
+# algorithm on n arguments that recurses with one less argument each
+# iteration will scan n * (n + 1) / 2 arguments, for O(n^2) time.  In
+# M4 1.6, this was fixed so that $@ is only scanned once, then
+# back-references are made to information stored about the scan.
+# Thus, n iterations need only scan n arguments, for O(n) time.
+# Additionally, in M4 1.4.x, recursive algorithms did not clean up
+# memory very well, requiring O(n^2) memory rather than O(n) for n
+# iterations.
+#
+# This file is designed to overcome the quadratic nature of $@
+# recursion by writing a variant of m4_foreach that uses m4_for rather
+# than $@ recursion to operate on the list.  This involves more macro
+# expansions, but avoids the need to rescan a quadratic number of
+# arguments, making these replacements very attractive for M4 1.4.x.
+# On the other hand, in any version of M4, expanding additional macros
+# costs additional time; therefore, in M4 1.6, where $@ recursion uses
+# fewer macros, these replacements actually pessimize performance.
+# Additionally, the use of $10 to mean the tenth argument violates
+# POSIX; although all versions of m4 1.4.x support this meaning, a
+# future m4 version may switch to take it as the first argument
+# concatenated with a literal 0, so the implementations in this file
+# are not future-proof.  Thus, this file is conditionally included as
+# part of m4_init(), only when it is detected that M4 probably has
+# quadratic behavior (ie. it lacks the macro __m4_version__).
+#
+# Please keep this file in sync with m4sugar.m4.
+
+# m4_foreach(VARIABLE, LIST, EXPRESSION)
+# --------------------------------------
+# Expand EXPRESSION assigning each value of the LIST to VARIABLE.
+# LIST should have the form `item_1, item_2, ..., item_n', i.e. the
+# whole list must *quoted*.  Quote members too if you don't want them
+# to be expanded.
+#
+# This version minimizes the number of times that $@ is evaluated by
+# using m4_for to generate a boilerplate into VARIABLE then passing $@
+# to that temporary macro.  Thus, the recursion is done in m4_for
+# without reparsing any user input, and is not quadratic.  For an idea
+# of how this works, note that m4_foreach(i,[1,2],[i]) defines i to be
+#   m4_define([$1],[$3])$2[]m4_define([$1],[$4])$2[]m4_popdef([i])
+# then calls i([i],[i],[1],[2]).
+m4_define([m4_foreach],
+[m4_if([$2], [], [], [_$0([$1], [$3], $2)])])
+
+m4_define([_m4_foreach],
+[m4_define([$1], m4_pushdef([$1])_m4_for([$1], [3], [$#], [1],
+    [$0_([1], [2], _m4_defn([$1]))])[m4_popdef([$1])])m4_indir([$1], $@)])
+
+m4_define([_m4_foreach_],
+[[m4_define([$$1], [$$3])$$2[]]])
+
+# m4_case(SWITCH, VAL1, IF-VAL1, VAL2, IF-VAL2, ..., DEFAULT)
+# -----------------------------------------------------------
+# Find the first VAL that SWITCH matches, and expand the corresponding
+# IF-VAL.  If there are no matches, expand DEFAULT.
+#
+# Use m4_for to create a temporary macro in terms of a boilerplate
+# m4_if with final cleanup.  If $# is even, we have DEFAULT; if it is
+# odd, then rounding the last $# up in the temporary macro is
+# harmless.  For example, both m4_case(1,2,3,4,5) and
+# m4_case(1,2,3,4,5,6) result in the intermediate _m4_case being
+#   m4_if([$1],[$2],[$3],[$1],[$4],[$5],_m4_popdef([_m4_case])[$6])
+m4_define([m4_case],
+[m4_if(m4_eval([$# <= 2]), [1], [$2],
+[m4_pushdef([_$0], [m4_if(]m4_for([_m4_count], [2], m4_decr([$#]), [2],
+     [_$0_([1], _m4_count, m4_incr(_m4_count))])[_m4_popdef(
+	 [_$0])]m4_dquote($m4_eval([($# + 1) & ~1]))[)])_$0($@)])])
+
+m4_define([_m4_case_],
+[[[$$1],[$$2],[$$3],]])
+
+# m4_bmatch(SWITCH, RE1, VAL1, RE2, VAL2, ..., DEFAULT)
+# -----------------------------------------------------
+# m4 equivalent of
+#
+# if (SWITCH =~ RE1)
+#   VAL1;
+# elif (SWITCH =~ RE2)
+#   VAL2;
+# elif ...
+#   ...
+# else
+#   DEFAULT
+#
+# We build the temporary macro _m4_b:
+#   m4_define([_m4_b], _m4_defn([_m4_bmatch]))_m4_b([$1], [$2], [$3])...
+#   _m4_b([$1], [$m-1], [$m])_m4_b([], [], [$m+1]_m4_popdef([_m4_b]))
+# then invoke m4_unquote(_m4_b($@)), for concatenation with later text.
+m4_define([m4_bmatch],
+[m4_if([$#], 0, [m4_fatal([$0: too few arguments: $#])],
+       [$#], 1, [m4_fatal([$0: too few arguments: $#: $1])],
+       [$#], 2, [$2],
+       [m4_define([_m4_b], m4_pushdef([_m4_b])[m4_define([_m4_b],
+  _m4_defn([_$0]))]_m4_for([_m4_b], [3], m4_eval([($# + 1) / 2 * 2 - 1]),
+  [2], [_$0_([1], m4_decr(_m4_b), _m4_b)])[_m4_b([], [],]m4_dquote(
+  [$]m4_incr(_m4_b))[_m4_popdef([_m4_b]))])m4_unquote(_m4_b($@))])])
+
+m4_define([_m4_bmatch],
+[m4_if(m4_bregexp([$1], [$2]), [-1], [], [[$3]m4_define([$0])])])
+
+m4_define([_m4_bmatch_],
+[[_m4_b([$$1], [$$2], [$$3])]])
+
+
+# m4_cond(TEST1, VAL1, IF-VAL1, TEST2, VAL2, IF-VAL2, ..., [DEFAULT])
+# -------------------------------------------------------------------
+# Similar to m4_if, except that each TEST is expanded when encountered.
+# If the expansion of TESTn matches the string VALn, the result is IF-VALn.
+# The result is DEFAULT if no tests passed.  This macro allows
+# short-circuiting of expensive tests, where it pays to arrange quick
+# filter tests to run first.
+#
+# m4_cond already guarantees either 3*n or 3*n + 1 arguments, 1 <= n.
+# We only have to speed up _m4_cond, by building the temporary _m4_c:
+#   m4_define([_m4_c], _m4_defn([m4_unquote]))_m4_c([m4_if(($1), [($2)],
+#   [[$3]m4_define([_m4_c])])])_m4_c([m4_if(($4), [($5)],
+#   [[$6]m4_define([_m4_c])])])..._m4_c([m4_if(($m-2), [($m-1)],
+#   [[$m]m4_define([_m4_c])])])_m4_c([[$m+1]]_m4_popdef([_m4_c]))
+# We invoke m4_unquote(_m4_c($@)), for concatenation with later text.
+m4_define([_m4_cond],
+[m4_define([_m4_c], m4_pushdef([_m4_c])[m4_define([_m4_c],
+  _m4_defn([m4_unquote]))]_m4_for([_m4_c], [2], m4_eval([$# / 3 * 3 - 1]), [3],
+  [$0_(m4_decr(_m4_c), _m4_c, m4_incr(_m4_c))])[_m4_c(]m4_dquote(m4_dquote(
+  [$]m4_eval([$# / 3 * 3 + 1])))[_m4_popdef([_m4_c]))])m4_unquote(_m4_c($@))])
+
+m4_define([_m4_cond_],
+[[_m4_c([m4_if(($$1), [($$2)], [[$$3]m4_define([_m4_c])])])]])
+
+# m4_bpatsubsts(STRING, RE1, SUBST1, RE2, SUBST2, ...)
+# ----------------------------------------------------
+# m4 equivalent of
+#
+#   $_ = STRING;
+#   s/RE1/SUBST1/g;
+#   s/RE2/SUBST2/g;
+#   ...
+#
+# m4_bpatsubsts already validated an odd number of arguments; we only
+# need to speed up _m4_bpatsubsts.  To avoid nesting, we build the
+# temporary _m4_p:
+#   m4_define([_m4_p], [$1])m4_define([_m4_p],
+#   m4_bpatsubst(m4_dquote(_m4_defn([_m4_p])), [$2], [$3]))m4_define([_m4_p],
+#   m4_bpatsubst(m4_dquote(_m4_defn([_m4_p])), [$4], [$5]))m4_define([_m4_p],...
+#   m4_bpatsubst(m4_dquote(_m4_defn([_m4_p])), [$m-1], [$m]))m4_unquote(
+#   _m4_defn([_m4_p])_m4_popdef([_m4_p]))
+m4_define([_m4_bpatsubsts],
+[m4_define([_m4_p], m4_pushdef([_m4_p])[m4_define([_m4_p],
+  ]m4_dquote([$]1)[)]_m4_for([_m4_p], [3], [$#], [2], [$0_(m4_decr(_m4_p),
+  _m4_p)])[m4_unquote(_m4_defn([_m4_p])_m4_popdef([_m4_p]))])_m4_p($@)])
+
+m4_define([_m4_bpatsubsts_],
+[[m4_define([_m4_p],
+m4_bpatsubst(m4_dquote(_m4_defn([_m4_p])), [$$1], [$$2]))]])
+
+# m4_shiftn(N, ...)
+# -----------------
+# Returns ... shifted N times.  Useful for recursive "varargs" constructs.
+#
+# m4_shiftn already validated arguments; we only need to speed up
+# _m4_shiftn.  If N is 3, then we build the temporary _m4_s, defined as
+#   ,[$5],[$6],...,[$m]_m4_popdef([_m4_s])
+# before calling m4_shift(_m4_s($@)).
+m4_define([_m4_shiftn],
+[m4_if(m4_incr([$1]), [$#], [], [m4_define([_m4_s],
+	   m4_pushdef([_m4_s])_m4_for([_m4_s], m4_eval([$1 + 2]), [$#], [1],
+  [[,]m4_dquote([$]_m4_s)])[_m4_popdef([_m4_s])])m4_shift(_m4_s($@))])])
+
+# m4_do(STRING, ...)
+# ------------------
+# This macro invokes all its arguments (in sequence, of course).  It is
+# useful for making your macros more structured and readable by dropping
+# unnecessary dnl's and have the macros indented properly.
+#
+# Here, we use the temporary macro _m4_do, defined as
+#   $1[]$2[]...[]$n[]_m4_popdef([_m4_do])
+m4_define([m4_do],
+[m4_if([$#], [0], [],
+       [m4_define([_$0], m4_pushdef([_$0])_m4_for([_$0], [1], [$#], [1],
+		  [$_$0[[]]])[_m4_popdef([_$0])])_$0($@)])])
+
+# m4_dquote_elt(ARGS)
+# -------------------
+# Return ARGS as an unquoted list of double-quoted arguments.
+#
+# m4_foreach to the rescue.  It's easier to shift off the leading comma.
+m4_define([m4_dquote_elt],
+[m4_shift(m4_foreach([_m4_elt], [$@], [,m4_dquote(_m4_defn([_m4_elt]))]))])
+
+# m4_reverse(ARGS)
+# ----------------
+# Output ARGS in reverse order.
+#
+# Invoke _m4_r($@) with the temporary _m4_r built as
+#   [$m], [$m-1], ..., [$2], [$1]_m4_popdef([_m4_r])
+m4_define([m4_reverse],
+[m4_if([$#], [0], [], [$#], [1], [[$1]],
+[m4_define([_m4_r], m4_dquote([$$#])m4_pushdef([_m4_r])_m4_for([_m4_r],
+      m4_decr([$#]), [1], [-1],
+    [[, ]m4_dquote([$]_m4_r)])[_m4_popdef([_m4_r])])_m4_r($@)])])
+
+
+# m4_map(MACRO, LIST)
+# -------------------
+# Invoke MACRO($1), MACRO($2) etc. where $1, $2... are the elements
+# of LIST.  $1, $2... must in turn be lists, appropriate for m4_apply.
+#
+# m4_map/m4_map_sep only execute once; the speedup comes in fixing
+# _m4_map.  The mismatch in () is intentional, since $1 supplies the
+# opening `(' (but it sure looks odd!).  Build the temporary _m4_m:
+#   $1, [$3])$1, [$4])...$1, [$m])_m4_popdef([_m4_m])
+m4_define([_m4_map],
+[m4_if([$#], [2], [],
+       [m4_define([_m4_m], m4_pushdef([_m4_m])_m4_for([_m4_m], [3], [$#], [1],
+   [$0_([1], _m4_m)])[_m4_popdef([_m4_m])])_m4_m($@)])])
+
+m4_define([_m4_map_],
+[[$$1, [$$2])]])
+
+# m4_transform(EXPRESSION, ARG...)
+# --------------------------------
+# Expand EXPRESSION([ARG]) for each argument.  More efficient than
+# m4_foreach([var], [ARG...], [EXPRESSION(m4_defn([var]))])
+#
+# Invoke the temporary macro _m4_transform, defined as:
+#   $1([$2])[]$1([$3])[]...$1([$m])[]_m4_popdef([_m4_transform])
+m4_define([m4_transform],
+[m4_if([$#], [0], [m4_fatal([$0: too few arguments: $#])],
+       [$#], [1], [],
+       [m4_define([_$0], m4_pushdef([_$0])_m4_for([_$0], [2], [$#], [1],
+   [_$0_([1], _$0)])[_m4_popdef([_$0])])_$0($@)])])
+
+m4_define([_m4_transform_],
+[[$$1([$$2])[]]])
+
+# m4_transform_pair(EXPRESSION, [END-EXPR = EXPRESSION], ARG...)
+# --------------------------------------------------------------
+# Perform a pairwise grouping of consecutive ARGs, by expanding
+# EXPRESSION([ARG1], [ARG2]).  If there are an odd number of ARGs, the
+# final argument is expanded with END-EXPR([ARGn]).
+#
+# Build the temporary macro _m4_transform_pair, with the $2([$m+1])
+# only output if $# is odd:
+#   $1([$3], [$4])[]$1([$5], [$6])[]...$1([$m-1],
+#   [$m])[]m4_default([$2], [$1])([$m+1])[]_m4_popdef([_m4_transform_pair])
+m4_define([m4_transform_pair],
+[m4_if([$#], [0], [m4_fatal([$0: too few arguments: $#])],
+       [$#], [1], [m4_fatal([$0: too few arguments: $#: $1])],
+       [$#], [2], [],
+       [$#], [3], [m4_default([$2], [$1])([$3])[]],
+       [m4_define([_$0], m4_pushdef([_$0])_m4_for([_$0], [3],
+   m4_eval([$# / 2 * 2 - 1]), [2], [_$0_([1], _$0, m4_incr(_$0))])_$0_end(
+   [1], [2], [$#])[_m4_popdef([_$0])])_$0($@)])])
+
+m4_define([_m4_transform_pair_],
+[[$$1([$$2], [$$3])[]]])
+
+m4_define([_m4_transform_pair_end],
+[m4_if(m4_eval([$3 & 1]), [1], [[m4_default([$$2], [$$1])([$$3])[]]])])
+
+# m4_join(SEP, ARG1, ARG2...)
+# ---------------------------
+# Produce ARG1SEPARG2...SEPARGn.  Avoid back-to-back SEP when a given ARG
+# is the empty string.  No expansion is performed on SEP or ARGs.
+#
+# Use a self-modifying separator, since we don't know how many
+# arguments might be skipped before a separator is first printed, but
+# be careful if the separator contains $.  m4_foreach to the rescue.
+m4_define([m4_join],
+[m4_pushdef([_m4_sep], [m4_define([_m4_sep], _m4_defn([m4_echo]))])]dnl
+[m4_foreach([_m4_arg], [m4_shift($@)],
+	    [m4_ifset([_m4_arg], [_m4_sep([$1])_m4_defn([_m4_arg])])])]dnl
+[_m4_popdef([_m4_sep])])
+
+# m4_joinall(SEP, ARG1, ARG2...)
+# ------------------------------
+# Produce ARG1SEPARG2...SEPARGn.  An empty ARG results in back-to-back SEP.
+# No expansion is performed on SEP or ARGs.
+#
+# A bit easier than m4_join.  m4_foreach to the rescue.
+m4_define([m4_joinall],
+[[$2]m4_if(m4_eval([$# <= 2]), [1], [],
+	   [m4_foreach([_m4_arg], [m4_shift2($@)],
+		       [[$1]_m4_defn([_m4_arg])])])])
+
+# m4_list_cmp(A, B)
+# -----------------
+# Compare the two lists of integer expressions A and B.
+#
+# m4_list_cmp takes care of any side effects; we only override
+# _m4_list_cmp_raw, where we can safely expand lists multiple times.
+# First, insert padding so that both lists are the same length; the
+# trailing +0 is necessary to handle a missing list.  Next, create a
+# temporary macro to perform pairwise comparisons until an inequality
+# is found.  For example, m4_list_cmp([1], [1,2]) creates _m4_cmp as
+#   m4_if(m4_eval([($1) != ($3)]), [1], [m4_cmp([$1], [$3])],
+#         m4_eval([($2) != ($4)]), [1], [m4_cmp([$2], [$4])],
+#         [0]_m4_popdef([_m4_cmp], [_m4_size]))
+# then calls _m4_cmp([1+0], [0], [1], [2+0])
+m4_define([_m4_list_cmp_raw],
+[m4_if([$1], [$2], 0, [m4_pushdef(
+     [_m4_size])_m4_list_cmp($1+0_m4_list_pad(m4_count($1), m4_count($2)),
+			     $2+0_m4_list_pad(m4_count($2), m4_count($1)))])])
+
+m4_define([_m4_list_pad],
+[m4_if(m4_eval($1 < $2), [1],
+       [_m4_for([_m4_size], m4_incr([$1]), [$2], [1], [,0])])])
+
+m4_define([_m4_list_cmp],
+[m4_define([_m4_size], m4_eval([$# >> 1]))]dnl
+[m4_define([_m4_cmp], m4_pushdef([_m4_cmp])[m4_if(]_m4_for([_m4_cmp],
+   [1], _m4_size, [1], [$0_(_m4_cmp, m4_eval(_m4_cmp + _m4_size))])[
+      [0]_m4_popdef([_m4_cmp], [_m4_size]))])_m4_cmp($@)])
+
+m4_define([_m4_list_cmp_],
+[[m4_eval([($$1) != ($$2)]), [1], [m4_cmp([$$1], [$$2])],
+]])
+
+# m4_max(EXPR, ...)
+# m4_min(EXPR, ...)
+# -----------------
+# Return the decimal value of the maximum (or minimum) in a series of
+# integer expressions.
+#
+# m4_foreach to the rescue; we only need to replace _m4_minmax.  Here,
+# we need a temporary macro to track the best answer so far, so that
+# the foreach expression is tractable.
+m4_define([_m4_minmax],
+[m4_pushdef([_m4_best], m4_eval([$2]))m4_foreach([_m4_arg], [m4_shift2($@)],
+    [m4_define([_m4_best], $1(_m4_best, _m4_defn([_m4_arg])))])]dnl
+[_m4_best[]_m4_popdef([_m4_best])])
+
+# m4_set_add_all(SET, VALUE...)
+# -----------------------------
+# Add each VALUE into SET.  This is O(n) in the number of VALUEs, and
+# can be faster than calling m4_set_add for each VALUE.
+#
+# m4_foreach to the rescue.  If no deletions have occurred, then avoid
+# the speed penalty of m4_set_add.
+m4_define([m4_set_add_all],
+[m4_if([$#], [0], [], [$#], [1], [],
+       [m4_define([_m4_set_size($1)], m4_eval(m4_set_size([$1])
+	  + m4_len(m4_foreach([_m4_arg], [m4_shift($@)],
+    m4_ifdef([_m4_set_cleanup($1)],
+	     [[m4_set_add([$1], _m4_defn([_m4_arg]))]],
+	     [[m4_ifdef([_m4_set([$1],]_m4_defn([_m4_arg])[)], [],
+			[m4_define([_m4_set([$1],]_m4_defn([_m4_arg])[)],
+				   [1])m4_pushdef([_m4_set([$1])],
+	_m4_defn([_m4_arg]))-])]])))))])])

data/m4sugar/m4sugar.m4

@@ -1 +0,0 @@
-../../submodules/autoconf/lib/m4sugar/m4sugar.m4

data/skeletons/c++.m4

@@ -1,778 +0,0 @@
-                                                            -*- Autoconf -*-
-
-# C++ skeleton for Bison
-
-# Copyright (C) 2002-2022, 2025-2026 Free Software Foundation, Inc.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-# Sanity checks, before defaults installed by c.m4.
-b4_percent_define_ifdef([[api.value.union.name]],
-  [b4_complain_at(b4_percent_define_get_loc([[api.value.union.name]]),
-                  [named %union is invalid in C++])])
-
-b4_percent_define_default([[api.symbol.prefix]], [[S_]])
-
-m4_include(b4_skeletonsdir/[c.m4])
-
-b4_percent_define_check_kind([api.namespace], [code], [deprecated])
-b4_percent_define_check_kind([api.parser.class], [code], [deprecated])
-
-
-## ----- ##
-## C++.  ##
-## ----- ##
-
-# b4_comment(TEXT, [PREFIX])
-# --------------------------
-# Put TEXT in comment. Prefix all the output lines with PREFIX.
-m4_define([b4_comment],
-[_b4_comment([$1], [$2// ], [$2// ])])
-
-
-# b4_inline(hh|cc)
-# ----------------
-# Expand to `inline\n  ` if $1 is hh.
-m4_define([b4_inline],
-[m4_case([$1],
-  [cc], [],
-  [hh], [[inline
-  ]],
-  [m4_fatal([$0: invalid argument: $1])])])
-
-
-# b4_cxx_portability
-# ------------------
-m4_define([b4_cxx_portability],
-[#if defined __cplusplus
-# define YY_CPLUSPLUS __cplusplus
-#else
-# define YY_CPLUSPLUS 199711L
-#endif
-
-// Support move semantics when possible.
-#if 201103L <= YY_CPLUSPLUS
-# define YY_MOVE           std::move
-# define YY_MOVE_OR_COPY   move
-# define YY_MOVE_REF(Type) Type&&
-# define YY_RVREF(Type)    Type&&
-# define YY_COPY(Type)     Type
-#else
-# define YY_MOVE
-# define YY_MOVE_OR_COPY   copy
-# define YY_MOVE_REF(Type) Type&
-# define YY_RVREF(Type)    const Type&
-# define YY_COPY(Type)     const Type&
-#endif
-
-// Support noexcept when possible.
-#if 201103L <= YY_CPLUSPLUS
-# define YY_NOEXCEPT noexcept
-# define YY_NOTHROW
-#else
-# define YY_NOEXCEPT
-# define YY_NOTHROW throw ()
-#endif
-
-// Support constexpr when possible.
-#if 201703 <= YY_CPLUSPLUS
-# define YY_CONSTEXPR constexpr
-#else
-# define YY_CONSTEXPR
-#endif[]dnl
-])
-
-
-## ---------------- ##
-## Default values.  ##
-## ---------------- ##
-
-b4_percent_define_default([[api.parser.class]], [[parser]])
-
-# Don't do that so that we remember whether we're using a user
-# request, or the default value.
-#
-# b4_percent_define_default([[api.location.type]], [[location]])
-
-b4_percent_define_default([[api.filename.type]], [[const std::string]])
-# Make it a warning for those who used betas of Bison 3.0.
-b4_percent_define_default([[api.namespace]], m4_defn([b4_prefix]))
-
-b4_percent_define_default([[define_location_comparison]],
-                          [m4_if(b4_percent_define_get([[filename_type]]),
-                                 [std::string], [[true]], [[false]])])
-
-
-
-## ----------- ##
-## Namespace.  ##
-## ----------- ##
-
-m4_define([b4_namespace_ref], [b4_percent_define_get([[api.namespace]])])
-
-
-# Don't permit an empty b4_namespace_ref.  Any '::parser::foo' appended to it
-# would compile as an absolute reference with 'parser' in the global namespace.
-# b4_namespace_open would open an anonymous namespace and thus establish
-# internal linkage.  This would compile.  However, it's cryptic, and internal
-# linkage for the parser would be specified in all translation units that
-# include the header, which is always generated.  If we ever need to permit
-# internal linkage somehow, surely we can find a cleaner approach.
-m4_if(m4_bregexp(b4_namespace_ref, [^[	 ]*$]), [-1], [],
-[b4_complain_at(b4_percent_define_get_loc([[api.namespace]]),
-                [[namespace reference is empty]])])
-
-# Instead of assuming the C++ compiler will do it, Bison should reject any
-# invalid b4_namespace_ref that would be converted to a valid
-# b4_namespace_open.  The problem is that Bison doesn't always output
-# b4_namespace_ref to uncommented code but should reserve the ability to do so
-# in future releases without risking breaking any existing user grammars.
-# Specifically, don't allow empty names as b4_namespace_open would just convert
-# those into anonymous namespaces, and that might tempt some users.
-m4_if(m4_bregexp(b4_namespace_ref, [::[	 ]*::]), [-1], [],
-[b4_complain_at(b4_percent_define_get_loc([[api.namespace]]),
-                [[namespace reference has consecutive "::"]])])
-m4_if(m4_bregexp(b4_namespace_ref, [::[	 ]*$]), [-1], [],
-[b4_complain_at(b4_percent_define_get_loc([[api.namespace]]),
-                [[namespace reference has a trailing "::"]])])
-
-m4_define([b4_namespace_open],
-[b4_user_code([b4_percent_define_get_syncline([[api.namespace]])dnl
-[namespace ]m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref),
-                                                [^\(.\)[	 ]*::], [\1])),
-                         [::], [ { namespace ])[ {]])])
-
-m4_define([b4_namespace_close],
-[b4_user_code([b4_percent_define_get_syncline([[api.namespace]])dnl
-m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref[ ]),
-                                    [^\(.\)[	 ]*\(::\)?\([^][:]\|:[^:]\)*],
-                                    [\1])),
-             [::\([^][:]\|:[^:]\)*], [} ])[} // ]b4_namespace_ref])])
-
-
-## ------------- ##
-## Token kinds.  ##
-## ------------- ##
-
-
-# b4_token_enums
-# --------------
-# Output the definition of the token kinds.
-m4_define([b4_token_enums],
-[[enum token_kind_type
-      {
-        ]b4_symbol([-2], [id])[ = -2,
-]b4_symbol_foreach([b4_token_enum])dnl
-[      };]dnl
-])
-
-
-
-## -------------- ##
-## Symbol kinds.  ##
-## -------------- ##
-
-# b4_declare_symbol_enum
-# ----------------------
-# The definition of the symbol internal numbers as an enum.
-# Defining YYEMPTY here is important: it forces the compiler
-# to use a signed type, which matters for yytoken.
-m4_define([b4_declare_symbol_enum],
-[[enum symbol_kind_type
-      {
-        YYNTOKENS = ]b4_tokens_number[, ///< Number of tokens.
-        ]b4_symbol(empty, kind_base)[ = -2,
-]b4_symbol_foreach([      b4_symbol_enum])dnl
-[      };]])
-
-
-
-## ----------------- ##
-## Semantic Values.  ##
-## ----------------- ##
-
-
-
-# b4_value_type_declare
-# ---------------------
-# Declare value_type.
-m4_define([b4_value_type_declare],
-[b4_value_type_setup[]dnl
-[    /// Symbol semantic values.
-]m4_bmatch(b4_percent_define_get_kind([[api.value.type]]),
-[code],
-[[    typedef ]b4_percent_define_get([[api.value.type]])[ value_type;]],
-[m4_bmatch(b4_percent_define_get([[api.value.type]]),
-[union\|union-directive],
-[[    union value_type
-    {
-]b4_user_union_members[
-    };]])])dnl
-])
-
-
-# b4_public_types_declare
-# -----------------------
-# Define the public types: token, semantic value, location, and so forth.
-# Depending on %define token_lex, may be output in the header or source file.
-m4_define([b4_public_types_declare],
-[b4_glr2_cc_if(
-[b4_value_type_declare],
-[[#ifdef ]b4_api_PREFIX[STYPE
-# ifdef __GNUC__
-#  pragma GCC message "bison: do not #define ]b4_api_PREFIX[STYPE in C++, use %define api.value.type"
-# endif
-    typedef ]b4_api_PREFIX[STYPE value_type;
-#else
-]b4_value_type_declare[
-#endif
-    /// Backward compatibility (Bison 3.8).
-    typedef value_type semantic_type;
-]])[]b4_locations_if([
-    /// Symbol locations.
-    typedef b4_percent_define_get([[api.location.type]],
-                                  [[location]]) location_type;])[
-
-    /// Syntax errors thrown from user actions.
-    struct syntax_error : std::runtime_error
-    {
-      syntax_error (]b4_locations_if([const location_type& l, ])[const std::string& m)
-        : std::runtime_error (m)]b4_locations_if([
-        , location (l)])[
-      {}
-
-      syntax_error (const syntax_error& s)
-        : std::runtime_error (s.what ())]b4_locations_if([
-        , location (s.location)])[
-      {}
-
-      ~syntax_error () YY_NOEXCEPT YY_NOTHROW;]b4_locations_if([
-
-      location_type location;])[
-    };
-
-    /// Token kinds.
-    struct token
-    {
-      ]b4_token_enums[]b4_glr2_cc_if([], [[
-      /// Backward compatibility alias (Bison 3.6).
-      typedef token_kind_type yytokentype;]])[
-    };
-
-    /// Token kind, as returned by yylex.
-    typedef token::token_kind_type token_kind_type;]b4_glr2_cc_if([], [[
-
-    /// Backward compatibility alias (Bison 3.6).
-    typedef token_kind_type token_type;]])[
-
-    /// Symbol kinds.
-    struct symbol_kind
-    {
-      ]b4_declare_symbol_enum[
-    };
-
-    /// (Internal) symbol kind.
-    typedef symbol_kind::symbol_kind_type symbol_kind_type;
-
-    /// The number of tokens.
-    static const symbol_kind_type YYNTOKENS = symbol_kind::YYNTOKENS;
-]])
-
-
-# b4_symbol_type_define
-# ---------------------
-# Define symbol_type, the external type for symbols used for symbol
-# constructors.
-m4_define([b4_symbol_type_define],
-[[    /// A complete symbol.
-    ///
-    /// Expects its Base type to provide access to the symbol kind
-    /// via kind ().
-    ///
-    /// Provide access to semantic value]b4_locations_if([ and location])[.
-    template <typename Base>
-    struct basic_symbol : Base
-    {
-      /// Alias to Base.
-      typedef Base super_type;
-
-      /// Default constructor.
-      basic_symbol () YY_NOEXCEPT
-        : value ()]b4_locations_if([
-        , location ()])[
-      {}
-
-#if 201103L <= YY_CPLUSPLUS
-      /// Move constructor.
-      basic_symbol (basic_symbol&& that)
-        : Base (std::move (that))
-        , value (]b4_variant_if([], [std::move (that.value)]))b4_locations_if([
-        , location (std::move (that.location))])[
-      {]b4_variant_if([
-        b4_symbol_variant([this->kind ()], [value], [move],
-                          [std::move (that.value)])
-      ])[}
-#endif
-
-      /// Copy constructor.
-      basic_symbol (const basic_symbol& that);]b4_variant_if([[
-
-      /// Constructors for typed symbols.
-]b4_type_foreach([b4_basic_symbol_constructor_define], [
-])], [[
-      /// Constructor for valueless symbols.
-      basic_symbol (typename Base::kind_type t]b4_locations_if([,
-                    YY_MOVE_REF (location_type) l])[);
-
-      /// Constructor for symbols with semantic value.
-      basic_symbol (typename Base::kind_type t,
-                    YY_RVREF (value_type) v]b4_locations_if([,
-                    YY_RVREF (location_type) l])[);
-]])[
-      /// Destroy the symbol.
-      ~basic_symbol ()
-      {
-        clear ();
-      }
-
-#if 201103L <= YY_CPLUSPLUS
-      /// Copy assignment.
-      basic_symbol& operator= (const basic_symbol& that)
-      {
-        Base::operator= (that);]b4_variant_if([[
-        ]b4_symbol_variant([this->kind ()], [value], [copy],
-                           [that.value])], [[
-        value = that.value]])[;]b4_locations_if([[
-        location = that.location;]])[
-        return *this;
-      }
-
-      /// Move assignment.
-      basic_symbol& operator= (basic_symbol&& that)
-      {
-        Base::operator= (std::move (that));]b4_variant_if([[
-        ]b4_symbol_variant([this->kind ()], [value], [move],
-                           [std::move (that.value)])], [[
-        value = std::move (that.value)]])[;]b4_locations_if([[
-        location = std::move (that.location);]])[
-        return *this;
-      }
-#endif
-
-      /// Destroy contents, and record that is empty.
-      void clear () YY_NOEXCEPT
-      {]b4_variant_if([[
-        // User destructor.
-        symbol_kind_type yykind = this->kind ();
-        basic_symbol<Base>& yysym = *this;
-        (void) yysym;
-        switch (yykind)
-        {
-]b4_symbol_foreach([b4_symbol_destructor])dnl
-[       default:
-          break;
-        }
-
-        // Value type destructor.
-]b4_symbol_variant([[yykind]], [[value]], [[template destroy]])])[
-        Base::clear ();
-      }
-
-]b4_parse_error_bmatch(
-[custom\|detailed],
-[[      /// The user-facing name of this symbol.
-      const char *name () const YY_NOEXCEPT
-      {
-        return ]b4_parser_class[::symbol_name (this->kind ());
-      }]],
-[simple],
-[[#if ]b4_api_PREFIX[DEBUG || ]b4_token_table_flag[
-      /// The user-facing name of this symbol.
-      const char *name () const YY_NOEXCEPT
-      {
-        return ]b4_parser_class[::symbol_name (this->kind ());
-      }
-#endif // #if ]b4_api_PREFIX[DEBUG || ]b4_token_table_flag[
-]],
-[verbose],
-[[      /// The user-facing name of this symbol.
-      std::string name () const YY_NOEXCEPT
-      {
-        return ]b4_parser_class[::symbol_name (this->kind ());
-      }]])[]b4_glr2_cc_if([], [[
-
-      /// Backward compatibility (Bison 3.6).
-      symbol_kind_type type_get () const YY_NOEXCEPT;]])[
-
-      /// Whether empty.
-      bool empty () const YY_NOEXCEPT;
-
-      /// Destructive move, \a s is emptied into this.
-      void move (basic_symbol& s);
-
-      /// The semantic value.
-      value_type value;]b4_locations_if([
-
-      /// The location.
-      location_type location;])[
-
-    private:
-#if YY_CPLUSPLUS < 201103L
-      /// Assignment operator.
-      basic_symbol& operator= (const basic_symbol& that);
-#endif
-    };
-
-    /// Type access provider for token (enum) based symbols.
-    struct by_kind
-    {
-      /// The symbol kind as needed by the constructor.
-      typedef token_kind_type kind_type;
-
-      /// Default constructor.
-      by_kind () YY_NOEXCEPT;
-
-#if 201103L <= YY_CPLUSPLUS
-      /// Move constructor.
-      by_kind (by_kind&& that) YY_NOEXCEPT;
-#endif
-
-      /// Copy constructor.
-      by_kind (const by_kind& that) YY_NOEXCEPT;
-
-      /// Constructor from (external) token numbers.
-      by_kind (kind_type t) YY_NOEXCEPT;
-
-#if 201103L <= YY_CPLUSPLUS
-      /// Copy assignment.
-      by_kind& operator= (const by_kind& that);
-
-      /// Move assignment.
-      by_kind& operator= (by_kind&& that);
-#endif
-
-      /// Record that this symbol is empty.
-      void clear () YY_NOEXCEPT;
-
-      /// Steal the symbol kind from \a that.
-      void move (by_kind& that);
-
-      /// The (internal) type number (corresponding to \a type).
-      /// \a empty when empty.
-      symbol_kind_type kind () const YY_NOEXCEPT;]b4_glr2_cc_if([], [[
-
-      /// Backward compatibility (Bison 3.6).
-      symbol_kind_type type_get () const YY_NOEXCEPT;]])[
-
-      /// The symbol kind.
-      /// \a ]b4_symbol_prefix[YYEMPTY when empty.
-      symbol_kind_type kind_;
-    };]b4_glr2_cc_if([], [[
-
-    /// Backward compatibility for a private implementation detail (Bison 3.6).
-    typedef by_kind by_type;]])[
-
-    /// "External" symbols: returned by the scanner.
-    struct symbol_type : basic_symbol<by_kind>
-    {]b4_variant_if([[
-      /// Superclass.
-      typedef basic_symbol<by_kind> super_type;
-
-      /// Empty symbol.
-      symbol_type () YY_NOEXCEPT {}
-
-      /// Constructor for valueless symbols, and symbols from each type.
-]b4_type_foreach([_b4_symbol_constructor_define])dnl
-    ])[};
-]])
-
-
-# b4_public_types_define(hh|cc)
-# -----------------------------
-# Provide the implementation needed by the public types.
-m4_define([b4_public_types_define],
-[[  // basic_symbol.
-  template <typename Base>
-  ]b4_parser_class[::basic_symbol<Base>::basic_symbol (const basic_symbol& that)
-    : Base (that)
-    , value (]b4_variant_if([], [that.value]))b4_locations_if([
-    , location (that.location)])[
-  {]b4_variant_if([
-    b4_symbol_variant([this->kind ()], [value], [copy],
-                      [YY_MOVE (that.value)])
-  ])[}
-
-]b4_variant_if([], [[
-  /// Constructor for valueless symbols.
-  template <typename Base>
-  ]b4_parser_class[::basic_symbol<Base>::basic_symbol (]b4_join(
-          [typename Base::kind_type t],
-          b4_locations_if([YY_MOVE_REF (location_type) l]))[)
-    : Base (t)
-    , value ()]b4_locations_if([
-    , location (l)])[
-  {}
-
-  template <typename Base>
-  ]b4_parser_class[::basic_symbol<Base>::basic_symbol (]b4_join(
-          [typename Base::kind_type t],
-          [YY_RVREF (value_type) v],
-          b4_locations_if([YY_RVREF (location_type) l]))[)
-    : Base (t)
-    , value (]b4_variant_if([], [YY_MOVE (v)])[)]b4_locations_if([
-    , location (YY_MOVE (l))])[
-  {]b4_variant_if([[
-    (void) v;
-    ]b4_symbol_variant([this->kind ()], [value], [YY_MOVE_OR_COPY], [YY_MOVE (v)])])[}]])[
-
-]b4_glr2_cc_if([], [[
-  template <typename Base>
-  ]b4_parser_class[::symbol_kind_type
-  ]b4_parser_class[::basic_symbol<Base>::type_get () const YY_NOEXCEPT
-  {
-    return this->kind ();
-  }
-]])[
-
-  template <typename Base>
-  bool
-  ]b4_parser_class[::basic_symbol<Base>::empty () const YY_NOEXCEPT
-  {
-    return this->kind () == ]b4_symbol(empty, kind)[;
-  }
-
-  template <typename Base>
-  void
-  ]b4_parser_class[::basic_symbol<Base>::move (basic_symbol& s)
-  {
-    super_type::move (s);
-    ]b4_variant_if([b4_symbol_variant([this->kind ()], [value], [move],
-                                      [YY_MOVE (s.value)])],
-                   [value = YY_MOVE (s.value);])[]b4_locations_if([
-    location = YY_MOVE (s.location);])[
-  }
-
-  // by_kind.
-  ]b4_inline([$1])b4_parser_class[::by_kind::by_kind () YY_NOEXCEPT
-    : kind_ (]b4_symbol(empty, kind)[)
-  {}
-
-#if 201103L <= YY_CPLUSPLUS
-  ]b4_inline([$1])b4_parser_class[::by_kind::by_kind (by_kind&& that) YY_NOEXCEPT
-    : kind_ (that.kind_)
-  {
-    that.clear ();
-  }
-#endif
-
-  ]b4_inline([$1])b4_parser_class[::by_kind::by_kind (const by_kind& that) YY_NOEXCEPT
-    : kind_ (that.kind_)
-  {}
-
-  ]b4_inline([$1])b4_parser_class[::by_kind::by_kind (token_kind_type t) YY_NOEXCEPT
-    : kind_ (yytranslate_ (t))
-  {}
-
-#if 201103L <= YY_CPLUSPLUS
-  ]b4_inline([$1])]b4_parser_class[::by_kind&
-  b4_parser_class[::by_kind::by_kind::operator= (const by_kind& that)
-  {
-    kind_ = that.kind_;
-    return *this;
-  }
-
-  ]b4_inline([$1])]b4_parser_class[::by_kind&
-  b4_parser_class[::by_kind::by_kind::operator= (by_kind&& that)
-  {
-    kind_ = that.kind_;
-    that.clear ();
-    return *this;
-  }
-#endif
-
-  ]b4_inline([$1])[void
-  ]b4_parser_class[::by_kind::clear () YY_NOEXCEPT
-  {
-    kind_ = ]b4_symbol(empty, kind)[;
-  }
-
-  ]b4_inline([$1])[void
-  ]b4_parser_class[::by_kind::move (by_kind& that)
-  {
-    kind_ = that.kind_;
-    that.clear ();
-  }
-
-  ]b4_inline([$1])[]b4_parser_class[::symbol_kind_type
-  ]b4_parser_class[::by_kind::kind () const YY_NOEXCEPT
-  {
-    return kind_;
-  }
-
-]b4_glr2_cc_if([], [[
-  ]b4_inline([$1])[]b4_parser_class[::symbol_kind_type
-  ]b4_parser_class[::by_kind::type_get () const YY_NOEXCEPT
-  {
-    return this->kind ();
-  }
-]])[
-]])
-
-
-# b4_token_constructor_define
-# ----------------------------
-# Define make_FOO for all the token kinds.
-# Use at class-level.  Redefined in variant.hh.
-m4_define([b4_token_constructor_define], [])
-
-
-# b4_yytranslate_define(cc|hh)
-# ----------------------------
-# Define yytranslate_.  Sometimes used in the header file ($1=hh),
-# sometimes in the cc file.
-m4_define([b4_yytranslate_define],
-[  b4_inline([$1])b4_parser_class[::symbol_kind_type
-  ]b4_parser_class[::yytranslate_ (int t) YY_NOEXCEPT
-  {
-]b4_api_token_raw_if(
-[[    return static_cast<symbol_kind_type> (t);]],
-[[    // YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to
-    // TOKEN-NUM as returned by yylex.
-    static
-    const ]b4_int_type_for([b4_translate])[
-    translate_table[] =
-    {
-  ]b4_translate[
-    };
-    // Last valid token kind.
-    const int code_max = ]b4_code_max[;
-
-    if (t <= 0)
-      return symbol_kind::]b4_symbol_prefix[YYEOF;
-    else if (t <= code_max)
-      return static_cast <symbol_kind_type> (translate_table[t]);
-    else
-      return symbol_kind::]b4_symbol_prefix[YYUNDEF;]])[
-  }
-]])
-
-
-# b4_lhs_value([TYPE])
-# --------------------
-m4_define([b4_lhs_value],
-[b4_symbol_value([yyval], [$1])])
-
-
-# b4_rhs_value(RULE-LENGTH, POS, [TYPE])
-# --------------------------------------
-# FIXME: Dead code.
-m4_define([b4_rhs_value],
-[b4_symbol_value([yysemantic_stack_@{($1) - ($2)@}], [$3])])
-
-
-# b4_lhs_location()
-# -----------------
-# Expansion of @$.
-m4_define([b4_lhs_location],
-[(yyloc)])
-
-
-# b4_rhs_location(RULE-LENGTH, POS)
-# ---------------------------------
-# Expansion of @POS, where the current rule has RULE-LENGTH symbols
-# on RHS.
-m4_define([b4_rhs_location],
-[(yylocation_stack_@{($1) - ($2)@})])
-
-
-# b4_parse_param_decl
-# -------------------
-# Extra formal arguments of the constructor.
-# Change the parameter names from "foo" into "foo_yyarg", so that
-# there is no collision bw the user chosen attribute name, and the
-# argument name in the constructor.
-m4_define([b4_parse_param_decl],
-[m4_ifset([b4_parse_param],
-          [m4_map_sep([b4_parse_param_decl_1], [, ], [b4_parse_param])])])
-
-m4_define([b4_parse_param_decl_1],
-[$1_yyarg])
-
-
-
-# b4_parse_param_cons
-# -------------------
-# Extra initialisations of the constructor.
-m4_define([b4_parse_param_cons],
-          [m4_ifset([b4_parse_param],
-                    [
-      b4_cc_constructor_calls(b4_parse_param)])])
-m4_define([b4_cc_constructor_calls],
-          [m4_map_sep([b4_cc_constructor_call], [,
-      ], [$@])])
-m4_define([b4_cc_constructor_call],
-          [$2 ($2_yyarg)])
-
-# b4_parse_param_vars
-# -------------------
-# Extra instance variables.
-m4_define([b4_parse_param_vars],
-          [m4_ifset([b4_parse_param],
-                    [
-    // User arguments.
-b4_cc_var_decls(b4_parse_param)])])
-m4_define([b4_cc_var_decls],
-          [m4_map_sep([b4_cc_var_decl], [
-], [$@])])
-m4_define([b4_cc_var_decl],
-          [    $1;])
-
-
-## ---------##
-## Values.  ##
-## ---------##
-
-# b4_yylloc_default_define
-# ------------------------
-# Define YYLLOC_DEFAULT.
-m4_define([b4_yylloc_default_define],
-[[/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
-   If N is 0, then set CURRENT to the empty location which ends
-   the previous symbol: RHS[0] (always defined).  */
-
-# ifndef YYLLOC_DEFAULT
-#  define YYLLOC_DEFAULT(Current, Rhs, N)                               \
-    do                                                                  \
-      if (N)                                                            \
-        {                                                               \
-          (Current).begin  = YYRHSLOC (Rhs, 1).begin;                   \
-          (Current).end    = YYRHSLOC (Rhs, N).end;                     \
-        }                                                               \
-      else                                                              \
-        {                                                               \
-          (Current).begin = (Current).end = YYRHSLOC (Rhs, 0).end;      \
-        }                                                               \
-    while (false)
-# endif
-]])
-
-## -------- ##
-## Checks.  ##
-## -------- ##
-
-b4_token_ctor_if([b4_variant_if([],
-  [b4_fatal_at(b4_percent_define_get_loc(api.token.constructor),
-               [cannot use '%s' without '%s'],
-               [%define api.token.constructor],
-               [%define api.value.type variant]))])])

data/skeletons/c-like.m4

@@ -1,73 +0,0 @@
-                                                            -*- Autoconf -*-
-
-# Common code for C-like languages (C, C++, Java, etc.)
-
-# Copyright (C) 2012-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-
-# _b4_comment(TEXT, OPEN, CONTINUE, END)
-# --------------------------------------
-# Put TEXT in comment.  Avoid trailing spaces: don't indent empty lines.
-# Avoid adding indentation to the first line, as the indentation comes
-# from OPEN.  That's why we don't patsubst([$1], [^\(.\)], [   \1]).
-# Turn "*/" in TEXT into "* /" so that we don't unexpectedly close
-# the comments before its end.
-#
-# Prefix all the output lines with PREFIX.
-m4_define([_b4_comment],
-[$2[]b4_gsub(m4_expand([$1]),
-            [[*]/], [*\\/],
-            [/[*]], [/\\*],
-            [
-\(.\)], [
-$3\1])$4])
-
-
-# b4_comment(TEXT, [PREFIX])
-# --------------------------
-# Put TEXT in comment.  Prefix all the output lines with PREFIX.
-m4_define([b4_comment],
-[_b4_comment([$1], [$2/* ], [$2   ], [  */])])
-
-
-
-
-# _b4_dollar_dollar(VALUE, SYMBOL-NUM, FIELD, DEFAULT-FIELD)
-# ----------------------------------------------------------
-# If FIELD (or DEFAULT-FIELD) is non-null, return "VALUE.FIELD",
-# otherwise just VALUE.  Be sure to pass "(VALUE)" if VALUE is a
-# pointer.
-m4_define([_b4_dollar_dollar],
-[b4_symbol_value([$1],
-                 [$2],
-                 m4_if([$3], [[]],
-                       [[$4]], [[$3]]))])
-
-# b4_dollar_pushdef(VALUE-POINTER, SYMBOL-NUM, [TYPE_TAG], LOCATION)
-# b4_dollar_popdef
-# ------------------------------------------------------------------
-# Define b4_dollar_dollar for VALUE-POINTER and DEFAULT-FIELD,
-# and b4_at_dollar for LOCATION.
-m4_define([b4_dollar_pushdef],
-[m4_pushdef([b4_dollar_dollar],
-            [_b4_dollar_dollar([$1], [$2], m4_dquote($][1), [$3])])dnl
-m4_pushdef([b4_at_dollar], [$4])dnl
-])
-m4_define([b4_dollar_popdef],
-[m4_popdef([b4_at_dollar])dnl
-m4_popdef([b4_dollar_dollar])dnl
-])

data/skeletons/d-skel.m4

@@ -1,26 +0,0 @@
-                                                            -*- Autoconf -*-
-
-# D skeleton dispatching for Bison.
-
-# Copyright (C) 2018-2022, 2025-2026 Free Software Foundation, Inc.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-b4_glr_if(             [b4_complain([%%glr-parser not supported for D])])
-b4_nondeterministic_if([b4_complain([%%nondeterministic-parser not supported for D])])
-
-m4_define_default([b4_used_skeleton], [b4_skeletonsdir/[lalr1.d]])
-m4_define_default([b4_skeleton], ["b4_basename(b4_used_skeleton)"])
-
-m4_include(b4_used_skeleton)

data/skeletons/d.m4

@@ -1,627 +0,0 @@
-                                                            -*- Autoconf -*-
-
-# D language support for Bison
-
-# Copyright (C) 2018-2022, 2025-2026 Free Software Foundation, Inc.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-
-m4_include(b4_skeletonsdir/[c-like.m4])
-
-
-# b4_symbol_action(SYMBOL-NUM, ACTION)
-# ------------------------------------
-# Run the action ACTION ("destructor" or "printer") for SYMBOL-NUM.
-m4_define([b4_symbol_action],
-[b4_symbol_if([$1], [has_$2],
-[b4_dollar_pushdef([yyval],
-                   [$1],
-                   [],
-                   [yyloc])dnl
-    _b4_symbol_case([$1])[]dnl
-b4_syncline([b4_symbol([$1], [$2_line])], [b4_symbol([$1], [$2_file])])dnl
-b4_symbol([$1], [$2])
-b4_syncline([@oline@], [@ofile@])dnl
-        break;
-
-b4_dollar_popdef[]dnl
-])])
-
-
-# b4_use(EXPR)
-# ------------
-# Pacify the compiler about some maybe unused value.
-m4_define([b4_use],
-[])
-
-
-# b4_sync_start(LINE, FILE)
-# -------------------------
-m4_define([b4_sync_start], [[#]line $1 $2])
-
-
-# b4_list2(LIST1, LIST2)
-# ----------------------
-# Join two lists with a comma if necessary.
-m4_define([b4_list2],
-          [$1[]m4_ifval(m4_quote($1), [m4_ifval(m4_quote($2), [[, ]])])[]$2])
-
-
-# b4_percent_define_get3(DEF, PRE, POST, NOT)
-# -------------------------------------------
-# Expand to the value of DEF surrounded by PRE and POST if it's %define'ed,
-# otherwise NOT.
-m4_define([b4_percent_define_get3],
-          [m4_ifval(m4_quote(b4_percent_define_get([$1])),
-                [$2[]b4_percent_define_get([$1])[]$3], [$4])])
-
-# b4_percent_define_if_get2(ARG1, ARG2, DEF, NOT)
-# -----------------------------------------------
-# Expand to the value of DEF if ARG1 or ARG2 are %define'ed,
-# otherwise NOT.
-m4_define([b4_percent_define_if_get2],
-          [m4_ifval(m4_quote(b4_percent_define_get([$1])),
-                [$3], [m4_ifval(m4_quote(b4_percent_define_get([$2])),
-                      [$3], [$4])])])
-
-# b4_percent_define_class_before_interface(CLASS, INTERFACE)
-# ----------------------------------------------------------
-# Expand to a ', ' if both a class and an interface have been %define'ed
-m4_define([b4_percent_define_class_before_interface],
-          [m4_ifval(m4_quote(b4_percent_define_get([$1])),
-                [m4_ifval(m4_quote(b4_percent_define_get([$2])),
-                      [, ])])])
-
-
-# b4_flag_value(BOOLEAN-FLAG)
-# ---------------------------
-m4_define([b4_flag_value], [b4_flag_if([$1], [true], [false])])
-
-
-# b4_parser_class_declaration
-# ---------------------------
-# The declaration of the parser class ("class YYParser"), with all its
-# qualifiers/annotations.
-b4_percent_define_default([[api.parser.abstract]], [[false]])
-b4_percent_define_default([[api.parser.final]],    [[false]])
-b4_percent_define_default([[api.parser.public]],   [[false]])
-
-m4_define([b4_parser_class_declaration],
-[b4_percent_define_get3([api.parser.annotations], [], [ ])dnl
-b4_percent_define_flag_if([api.parser.public],   [public ])dnl
-b4_percent_define_flag_if([api.parser.abstract], [abstract ])dnl
-b4_percent_define_flag_if([api.parser.final],    [final ])dnl
-[class ]b4_parser_class[]dnl
-b4_percent_define_if_get2([api.parser.extends], [api.parser.implements], [ : ])dnl
-b4_percent_define_get([api.parser.extends])dnl
-b4_percent_define_class_before_interface([api.parser.extends], [api.parser.implements])dnl
-b4_percent_define_get([api.parser.implements])])
-
-
-# b4_lexer_if(TRUE, FALSE)
-# ------------------------
-m4_define([b4_lexer_if],
-[b4_percent_code_ifdef([[lexer]], [$1], [$2])])
-
-
-# b4_position_type_if(TRUE, FALSE)
-# --------------------------------
-m4_define([b4_position_type_if],
-[b4_percent_define_ifdef([[position_type]], [$1], [$2])])
-
-
-# b4_location_type_if(TRUE, FALSE)
-# --------------------------------
-m4_define([b4_location_type_if],
-[b4_percent_define_ifdef([[location_type]], [$1], [$2])])
-
-
-# b4_identification
-# -----------------
-m4_define([b4_identification],
-[[/** Version number for the Bison executable that generated this parser.  */
-  public static immutable string yy_bison_version = "]b4_version_string[";
-
-  /** Name of the skeleton that generated this parser.  */
-  public static immutable string yy_bison_skeleton = ]b4_skeleton[;
-]])
-
-
-## ------------ ##
-## Data types.  ##
-## ------------ ##
-
-# b4_int_type(MIN, MAX)
-# ---------------------
-# Return the smallest int type able to handle numbers ranging from
-# MIN to MAX (included).
-m4_define([b4_int_type],
-[m4_if(b4_ints_in($@,   [-128],   [127]), [1], [byte],
-       b4_ints_in($@, [-32768], [32767]), [1], [short],
-                                               [int])])
-
-# b4_int_type_for(NAME)
-# ---------------------
-# Return the smallest int type able to handle numbers ranging from
-# `NAME_min' to `NAME_max' (included).
-m4_define([b4_int_type_for],
-[b4_int_type($1_min, $1_max)])
-
-# b4_null
-# -------
-m4_define([b4_null], [null])
-
-
-# b4_integral_parser_table_define(NAME, DATA, COMMENT)
-#-----------------------------------------------------
-# Define "yy<TABLE-NAME>" whose contents is CONTENT.
-m4_define([b4_integral_parser_table_define],
-[m4_ifvaln([$3], [b4_comment([$3], [  ])])dnl
-private static immutable b4_int_type_for([$2])[[]] yy$1_ =
-@{
-  $2
-@};dnl
-])
-
-
-## ------------- ##
-## Token kinds.  ##
-## ------------- ##
-
-m4_define([b4_symbol(-2, id)],  [[YYEMPTY]])
-b4_percent_define_default([[api.token.raw]], [[true]])
-
-# b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
-# ---------------------------------------
-# Output the definition of this token as an enum.
-m4_define([b4_token_enum],
-[b4_token_format([  %s = %s,
-], [$1])])
-
-# b4_token_enums
-# --------------
-# Output the definition of the tokens as enums.
-m4_define([b4_token_enums],
-[/* Token kinds.  */
-public enum TokenKind {
-  ]b4_symbol(empty, id)[ = -2,
-b4_symbol_foreach([b4_token_enum])dnl
-}
-])
-
-# b4_symbol_translate(STRING)
-# ---------------------------
-# Used by "bison" in the array of symbol names to mark those that
-# require translation.
-m4_define([b4_symbol_translate],
-[[_($1)]])
-
-
-# _b4_token_constructor_define(SYMBOL-NUM)
-# ----------------------------------------
-# Define Symbol.FOO for SYMBOL-NUM.
-m4_define([_b4_token_constructor_define],
-[b4_token_visible_if([$1],
-[[
-    static auto ]b4_symbol([$1], [id])[(]b4_symbol_if([$1], [has_type],
-[b4_union_if([b4_symbol([$1], [type]],
-[[typeof(YYSemanticType.]b4_symbol([$1], [type])[]])) [val]])dnl
-[]b4_locations_if([b4_symbol_if([$1], [has_type], [[, ]])[Location l]])[)
-    {
-      return Symbol(TokenKind.]b4_symbol([$1], [id])[]b4_symbol_if([$1], [has_type],
-      [[, val]])[]b4_locations_if([[, l]])[);
-    }]])])
-
-# b4_token_constructor_define
-# ---------------------------
-# Define Symbol.FOO for each token kind FOO.
-m4_define([b4_token_constructor_define],
-[[
-    /* Implementation of token constructors for each symbol type visible to
-     * the user. The code generates static methods that have the same names
-     * as the TokenKinds.
-     */]b4_symbol_foreach([_b4_token_constructor_define])dnl
-])
-
-## -------------- ##
-## Symbol kinds.  ##
-## -------------- ##
-
-# b4_symbol_kind(NUM)
-# -------------------
-m4_define([b4_symbol_kind],
-[SymbolKind.b4_symbol_kind_base($@)])
-
-
-# b4_symbol_enum(SYMBOL-NUM)
-# --------------------------
-# Output the definition of this symbol as an enum.
-m4_define([b4_symbol_enum],
-[m4_format([    %-30s %s],
-           m4_format([[%s = %s,]],
-                     b4_symbol([$1], [kind_base]),
-                     [$1]),
-           [b4_symbol_tag_comment([$1])])])
-
-
-# b4_declare_symbol_enum
-# ----------------------
-# The definition of the symbol internal numbers as an enum.
-# Defining YYEMPTY here is important: it forces the compiler
-# to use a signed type, which matters for yytoken.
-m4_define([b4_declare_symbol_enum],
-[[  /* Symbol kinds.  */
-  struct SymbolKind
-  {
-    enum
-    {
-    ]b4_symbol(empty, kind_base)[ = -2,  /* No symbol.  */
-]b4_symbol_foreach([b4_symbol_enum])dnl
-[    }
-
-    private int yycode_;
-    alias yycode_ this;
-
-    this(int code)
-    {
-      yycode_ = code;
-    }
-
-    /* Return YYSTR after stripping away unnecessary quotes and
-     backslashes, so that it's suitable for yyerror.  The heuristic is
-     that double-quoting is unnecessary unless the string contains an
-     apostrophe, a comma, or backslash (other than backslash-backslash).
-     YYSTR is taken from yytname.  */
-    final void toString(void delegate(const(char)[]) sink) const
-    {
-      immutable string[] yy_sname = @{
-  ]b4_symbol_names[
-      @};]b4_has_translations_if([[
-      /* YYTRANSLATABLE[SYMBOL-NUM] -- Whether YY_SNAME[SYMBOL-NUM] is
-        internationalizable.  */
-      immutable ]b4_int_type_for([b4_translatable])[[] yytranslatable = @{
-  ]b4_translatable[
-      @};]])[
-
-      sink.formattedWrite!"%s"(yy_sname[yycode_]);
-    }
-  }
-]])
-
-
-# b4_case(ID, CODE, [COMMENTS])
-# -----------------------------
-m4_define([b4_case], [    case $1:m4_ifval([$3], [ b4_comment([$3])])
-$2
-      break;])
-
-
-## ---------------- ##
-## Default values.  ##
-## ---------------- ##
-
-m4_define([b4_yystype], [b4_percent_define_get([[stype]])])
-b4_percent_define_default([[stype]], [[YYSemanticType]])])
-
-# %name-prefix
-m4_define_default([b4_prefix], [[YY]])
-
-b4_percent_define_default([[api.parser.class]], [b4_prefix[]Parser])])
-m4_define([b4_parser_class], [b4_percent_define_get([[api.parser.class]])])
-
-#b4_percent_define_default([[location_type]], [Location])])
-m4_define([b4_location_type], b4_percent_define_ifdef([[location_type]],[b4_percent_define_get([[location_type]])],[YYLocation]))
-
-#b4_percent_define_default([[position_type]], [Position])])
-m4_define([b4_position_type], b4_percent_define_ifdef([[position_type]],[b4_percent_define_get([[position_type]])],[YYPosition]))
-
-
-## ---------------- ##
-## api.value.type.  ##
-## ---------------- ##
-
-
-# ---------------------- #
-# api.value.type=union.  #
-# ---------------------- #
-
-# b4_symbol_type_register(SYMBOL-NUM)
-# -----------------------------------
-# Symbol SYMBOL-NUM has a type (for union) instead of a type-tag.
-# Extend the definition of %union's body (b4_union_members) with a
-# field of that type, and extend the symbol's "type" field to point to
-# the field name, instead of the type name.
-m4_define([b4_symbol_type_register],
-[m4_define([b4_symbol($1, type_tag)],
-           [b4_symbol_if([$1], [has_id],
-                         [b4_symbol([$1], [id])],
-                         [yykind_[]b4_symbol([$1], [number])])])dnl
-m4_append([b4_union_members],
-m4_expand([m4_format([  %-40s %s],
-                     m4_expand([b4_symbol([$1], [type]) b4_symbol([$1], [type_tag]);]),
-                     [b4_symbol_tag_comment([$1])])]))
-])
-
-
-# b4_type_define_tag(SYMBOL1-NUM, ...)
-# ------------------------------------
-# For the batch of symbols SYMBOL1-NUM... (which all have the same
-# type), enhance the %union definition for each of them, and set
-# there "type" field to the field tag name, instead of the type name.
-m4_define([b4_type_define_tag],
-[b4_symbol_if([$1], [has_type],
-              [m4_map([b4_symbol_type_register], [$@])])
-])
-
-
-# b4_symbol_value_union(VAL, SYMBOL-NUM, [TYPE])
-# ----------------------------------------------
-# Same of b4_symbol_value, but when api.value.type=union.
-m4_define([b4_symbol_value_union],
-[m4_ifval([$3],
-          [(*($3*)(&$1))],
-          [m4_ifval([$2],
-                    [b4_symbol_if([$2], [has_type],
-                                  [($1.b4_symbol([$2], [type_tag]))],
-                                  [$1])],
-                    [$1])])])
-
-
-# b4_value_type_setup_union
-# -------------------------
-# Setup support for api.value.type=union.  Symbols are defined with a
-# type instead of a union member name: build the corresponding union,
-# and give the symbols their tag.
-m4_define([b4_value_type_setup_union],
-[m4_define([b4_union_members])
-b4_type_foreach([b4_type_define_tag])
-m4_copy_force([b4_symbol_value_union], [b4_symbol_value])
-])
-
-
-# _b4_value_type_setup_keyword
-# ----------------------------
-# api.value.type is defined with a keyword/string syntax.  Check if
-# that is properly defined, and prepare its use.
-m4_define([_b4_value_type_setup_keyword],
-[b4_percent_define_check_values([[[[api.value.type]],
-                                  [[none]],
-                                  [[union]],
-                                  [[union-directive]],
-                                  [[yystype]]]])dnl
-m4_case(b4_percent_define_get([[api.value.type]]),
-        [union],   [b4_value_type_setup_union])])
-
-
-# b4_value_type_setup
-# -------------------
-# Check if api.value.type is properly defined, and possibly prepare
-# its use.
-b4_define_silent([b4_value_type_setup],
-[
-# Define default value.
-b4_percent_define_ifdef([[api.value.type]], [],
-[# %union => api.value.type=union-directive
-m4_ifdef([b4_union_members],
-[m4_define([b4_percent_define_kind(api.value.type)], [keyword])
-m4_define([b4_percent_define(api.value.type)], [union-directive])],
-[# no tag seen => api.value.type={int}
-m4_if(b4_tag_seen_flag, 0,
-[m4_define([b4_percent_define_kind(api.value.type)], [code])
-m4_define([b4_percent_define(api.value.type)], [int])],
-[# otherwise api.value.type=yystype
-m4_define([b4_percent_define_kind(api.value.type)], [keyword])
-m4_define([b4_percent_define(api.value.type)], [yystype])])])])
-
-# Set up.
-m4_bmatch(b4_percent_define_get_kind([[api.value.type]]),
-   [keyword], [_b4_value_type_setup_keyword])
-])
-
-
-## ----------------- ##
-## Semantic Values.  ##
-## ----------------- ##
-
-
-# b4_symbol_value(VAL, [SYMBOL-NUM], [TYPE-TAG])
-# ----------------------------------------------
-# See README.  FIXME: factor in c-like?
-m4_define([b4_symbol_value],
-[m4_ifval([$3],
-          [($1.$3)],
-          [m4_ifval([$2],
-                    [b4_symbol_if([$2], [has_type],
-                                  [($1.b4_symbol([$2], [type]))],
-                                  [$1])],
-                    [$1])])])
-
-# b4_lhs_value(SYMBOL-NUM, [TYPE])
-# --------------------------------
-# See README.
-m4_define([b4_lhs_value],
-[b4_symbol_value([yyval], [$1], [$2])])
-
-
-# b4_rhs_value(RULE-LENGTH, POS, SYMBOL-NUM, [TYPE])
-# --------------------------------------------------
-# See README.
-#
-# In this simple implementation, %token and %type have class names
-# between the angle brackets.
-m4_define([b4_rhs_value],
-[b4_symbol_value([(yystack.valueAt (b4_subtract([$1], [$2])))], [$3], [$4])])
-
-
-# b4_lhs_location()
-# -----------------
-# Expansion of @$.
-m4_define([b4_lhs_location],
-[(yyloc)])
-
-
-# b4_rhs_location(RULE-LENGTH, POS)
-# ---------------------------------
-# Expansion of @POS, where the current rule has RULE-LENGTH symbols
-# on RHS.
-m4_define([b4_rhs_location],
-[yystack.locationAt (b4_subtract($@))])
-
-
-# b4_lex_param
-# b4_parse_param
-# --------------
-# If defined, b4_lex_param arrives double quoted, but below we prefer
-# it to be single quoted.  Same for b4_parse_param.
-
-# TODO: should be in bison.m4
-m4_define_default([b4_lex_param], [[]]))
-m4_define([b4_lex_param], b4_lex_param))
-m4_define([b4_parse_param], b4_parse_param))
-
-# b4_lex_param_decl
-# -------------------
-# Extra formal arguments of the constructor.
-m4_define([b4_lex_param_decl],
-[m4_ifset([b4_lex_param],
-          [b4_remove_comma([$1],
-                           b4_param_decls(b4_lex_param))],
-          [$1])])
-
-m4_define([b4_param_decls],
-          [m4_map([b4_param_decl], [$@])])
-m4_define([b4_param_decl], [, $1])
-
-m4_define([b4_remove_comma], [m4_ifval(m4_quote($1), [$1, ], [])m4_shift2($@)])
-
-
-
-# b4_parse_param_decl
-# -------------------
-# Extra formal arguments of the constructor.
-m4_define([b4_parse_param_decl],
-[m4_ifset([b4_parse_param],
-          [b4_remove_comma([$1],
-                           b4_param_decls(b4_parse_param))],
-          [$1])])
-
-
-
-# b4_lex_param_call
-# -------------------
-# Delegating the lexer parameters to the lexer constructor.
-m4_define([b4_lex_param_call],
-          [m4_ifset([b4_lex_param],
-                    [b4_remove_comma([$1],
-                                     b4_param_calls(b4_lex_param))],
-                    [$1])])
-m4_define([b4_param_calls],
-          [m4_map([b4_param_call], [$@])])
-m4_define([b4_param_call], [, $2])
-
-
-
-# b4_parse_param_cons
-# -------------------
-# Extra initialisations of the constructor.
-m4_define([b4_parse_param_cons],
-          [m4_ifset([b4_parse_param],
-                    [b4_constructor_calls(b4_parse_param)])])
-
-m4_define([b4_constructor_calls],
-          [m4_map([b4_constructor_call], [$@])])
-m4_define([b4_constructor_call],
-          [this.$2 = $2;
-          ])
-
-
-
-# b4_parse_param_vars
-# -------------------
-# Extra instance variables.
-m4_define([b4_parse_param_vars],
-          [m4_ifset([b4_parse_param],
-                    [
-    /* User arguments.  */
-b4_var_decls(b4_parse_param)])])
-
-m4_define([b4_var_decls],
-          [m4_map_sep([b4_var_decl], [
-], [$@])])
-m4_define([b4_var_decl],
-          [    protected $1;])
-
-
-# b4_public_types_declare
-# -----------------------
-# Define the public types: token, semantic value, location, and so forth.
-# Depending on %define token_lex, may be output in the header or source file.
-m4_define([b4_public_types_declare],
-[[
-alias Symbol = ]b4_parser_class[.Symbol;
-alias Value = ]b4_yystype[;]b4_locations_if([[
-alias Location = ]b4_location_type[;
-alias Position = ]b4_position_type[;]b4_push_if([[
-alias PUSH_MORE = ]b4_parser_class[.YYPUSH_MORE;
-alias ABORT = ]b4_parser_class[.YYABORT;
-alias ACCEPT = ]b4_parser_class[.YYACCEPT;]])[]])[
-]])
-
-
-# b4_basic_symbol_constructor_define
-# ----------------------------------
-# Create Symbol struct constructors for all the visible types.
-m4_define([b4_basic_symbol_constructor_define],
-[b4_token_visible_if([$1],
-[[    this(TokenKind token]b4_symbol_if([$1], [has_type],
-[[, ]b4_union_if([], [[typeof(YYSemanticType.]])b4_symbol([$1], [type])dnl
-[]b4_union_if([], [[) ]])[ val]])[]b4_locations_if([[, Location loc]])[)
-    {
-      kind = yytranslate_(token);]b4_union_if([b4_symbol_if([$1], [has_type], [[
-      static foreach (member; __traits(allMembers, YYSemanticType))
-      {
-        static if (is(typeof(mixin("value_." ~ member)) == ]b4_symbol([$1], [type])[))
-        {
-          mixin("value_." ~ member ~ " = val;");
-        }
-      }]])], [b4_symbol_if([$1], [has_type], [[
-      value_.]b4_symbol([$1], [type])[ = val;]])])[]b4_locations_if([
-      location_ = loc;])[
-    }
-]])])
-
-
-# b4_symbol_type_define
-# ---------------------
-# Define symbol_type, the external type for symbols used for symbol
-# constructors.
-m4_define([b4_symbol_type_define],
-[[
-  /**
-    * A complete symbol
-    */
-  struct Symbol
-  {
-    private SymbolKind kind;
-    private Value value_;]b4_locations_if([[
-    private Location location_;]])[
-
-]b4_type_foreach([b4_basic_symbol_constructor_define])[
-    SymbolKind token() { return kind; }
-    Value value() { return value_; }]b4_locations_if([[
-    Location location() { return location_; }]])[
-]b4_token_ctor_if([b4_token_constructor_define])[
-  }
-]])

data/skeletons/glr.cc

@@ -1,398 +0,0 @@
-# C++ GLR skeleton for Bison
-
-# Copyright (C) 2002-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-
-# This skeleton produces a C++ class that encapsulates a C glr parser.
-# This is in order to reduce the maintenance burden.  The glr.c
-# skeleton is clean and pure enough so that there are no real
-# problems.  The C++ interface is the same as that of lalr1.cc.  In
-# fact, glr.c can replace yacc.c without the user noticing any
-# difference, and similarly for glr.cc replacing lalr1.cc.
-#
-# The passing of parse-params
-#
-#   The additional arguments are stored as members of the parser
-#   object, yyparser.  The C routines need to carry yyparser
-#   throughout the C parser; that's easy: make yyparser an
-#   additional parse-param.  But because the C++ skeleton needs to
-#   know the "real" original parse-param, we save them
-#   (b4_parse_param_orig).  Note that b4_parse_param is overquoted
-#   (and c.m4 strips one level of quotes).  This is a PITA, and
-#   explains why there are so many levels of quotes.
-#
-# The locations
-#
-#   We use location.cc just like lalr1.cc, but because glr.c stores
-#   the locations in a union, the position and location classes
-#   must not have a constructor.  Therefore, contrary to lalr1.cc, we
-#   must not define "b4_location_constructors".  As a consequence the
-#   user must initialize the first positions (in particular the
-#   filename member).
-
-# We require a pure interface.
-m4_define([b4_pure_flag], [1])
-
-m4_include(b4_skeletonsdir/[c++.m4])
-b4_bison_locations_if([m4_include(b4_skeletonsdir/[location.cc])])
-
-m4_define([b4_parser_class],
-          [b4_percent_define_get([[api.parser.class]])])
-
-# Save the parse parameters.
-m4_define([b4_parse_param_orig], m4_defn([b4_parse_param]))
-
-# b4_parse_param_wrap
-# -------------------
-# New ones.
-m4_ifset([b4_parse_param],
-[m4_define([b4_parse_param_wrap],
-           [[b4_namespace_ref::b4_parser_class[& yyparser], [[yyparser]]],]
-m4_defn([b4_parse_param]))],
-[m4_define([b4_parse_param_wrap],
-           [[b4_namespace_ref::b4_parser_class[& yyparser], [[yyparser]]]])
-])
-
-
-# b4_yy_symbol_print_define
-# -------------------------
-# Bypass the default implementation to generate the "yy_symbol_print"
-# and "yy_symbol_value_print" functions.
-m4_define([b4_yy_symbol_print_define],
-[[/*--------------------.
-| Print this symbol.  |
-`--------------------*/
-
-static void
-yy_symbol_print (FILE *, ]b4_namespace_ref::b4_parser_class[::symbol_kind_type yytoken,
-                 const ]b4_namespace_ref::b4_parser_class[::value_type *yyvaluep]b4_locations_if([[,
-                 const ]b4_namespace_ref::b4_parser_class[::location_type *yylocationp]])[]b4_user_formals[)
-{
-]b4_parse_param_use[]dnl
-[  yyparser.yy_symbol_print_ (yytoken, yyvaluep]b4_locations_if([, yylocationp])[);
-}
-]])[
-
-# Hijack the initial action to initialize the locations.
-]b4_bison_locations_if([m4_define([b4_initial_action],
-[yylloc.initialize ();]m4_ifdef([b4_initial_action], [
-m4_defn([b4_initial_action])]))])[
-
-# Hijack the post prologue to declare yyerror.
-]m4_append([b4_post_prologue],
-[b4_syncline([@oline@], [@ofile@])dnl
-[static void
-yyerror (]b4_locations_if([[const ]b4_namespace_ref::b4_parser_class[::location_type *yylocationp,
-         ]])[]m4_ifset([b4_parse_param], [b4_formals(b4_parse_param),
-         ])[const char* msg);]])[
-
-# Inserted before the epilogue to define implementations (yyerror, parser member
-# functions etc.).
-]m4_define([b4_glr_cc_pre_epilogue],
-[b4_syncline([@oline@], [@ofile@])dnl
-[
-/*------------------.
-| Report an error.  |
-`------------------*/
-
-static void
-yyerror (]b4_locations_if([[const ]b4_namespace_ref::b4_parser_class[::location_type *yylocationp,
-         ]])[]m4_ifset([b4_parse_param], [b4_formals(b4_parse_param),
-         ])[const char* msg)
-{
-]b4_parse_param_use[]dnl
-[  yyparser.error (]b4_locations_if([[*yylocationp, ]])[msg);
-}
-
-
-]b4_namespace_open[
-]dnl In this section, the parse params are the original parse_params.
-m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
-[  /// Build a parser object.
-  ]b4_parser_class::b4_parser_class[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [
-    :])[
-#if ]b4_api_PREFIX[DEBUG
-    ]m4_ifset([b4_parse_param], [  ], [ :])[yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[
-#endif]b4_parse_param_cons[
-  {}
-
-  ]b4_parser_class::~b4_parser_class[ ()
-  {}
-
-  ]b4_parser_class[::syntax_error::~syntax_error () YY_NOEXCEPT YY_NOTHROW
-  {}
-
-  int
-  ]b4_parser_class[::operator() ()
-  {
-    return parse ();
-  }
-
-  int
-  ]b4_parser_class[::parse ()
-  {
-    return ::yy_parse_impl (*this]b4_user_args[);
-  }
-
-#if ]b4_api_PREFIX[DEBUG
-  /*--------------------.
-  | Print this symbol.  |
-  `--------------------*/
-
-  void
-  ]b4_parser_class[::yy_symbol_value_print_ (symbol_kind_type yykind,
-                           const value_type* yyvaluep]b4_locations_if([[,
-                           const location_type* yylocationp]])[) const
-  {]b4_locations_if([[
-    YY_USE (yylocationp);]])[
-    YY_USE (yyvaluep);
-    std::ostream& yyo = debug_stream ();
-    std::ostream& yyoutput = yyo;
-    YY_USE (yyoutput);
-    ]b4_symbol_actions([printer])[
-  }
-
-
-  void
-  ]b4_parser_class[::yy_symbol_print_ (symbol_kind_type yykind,
-                           const value_type* yyvaluep]b4_locations_if([[,
-                           const location_type* yylocationp]])[) const
-  {
-    *yycdebug_ << (yykind < YYNTOKENS ? "token" : "nterm")
-               << ' ' << yysymbol_name (yykind) << " ("]b4_locations_if([[
-               << *yylocationp << ": "]])[;
-    yy_symbol_value_print_ (yykind, yyvaluep]b4_locations_if([[, yylocationp]])[);
-    *yycdebug_ << ')';
-  }
-
-  std::ostream&
-  ]b4_parser_class[::debug_stream () const
-  {
-    return *yycdebug_;
-  }
-
-  void
-  ]b4_parser_class[::set_debug_stream (std::ostream& o)
-  {
-    yycdebug_ = &o;
-  }
-
-
-  ]b4_parser_class[::debug_level_type
-  ]b4_parser_class[::debug_level () const
-  {
-    return yydebug;
-  }
-
-  void
-  ]b4_parser_class[::set_debug_level (debug_level_type l)
-  {
-    // Actually, it is yydebug which is really used.
-    yydebug = l;
-  }
-
-#endif
-]m4_popdef([b4_parse_param])dnl
-b4_namespace_close[]dnl
-])
-
-
-m4_define([b4_define_symbol_kind],
-[m4_format([#define %-15s %s],
-           b4_symbol($][1, kind_base),
-           b4_namespace_ref[::]b4_parser_class[::symbol_kind::]b4_symbol($1, kind_base))
-])
-
-# b4_glr_cc_setup
-# ---------------
-# Setup redirections for glr.c: Map the names used in c.m4 to the ones used
-# in c++.m4.
-m4_define([b4_glr_cc_setup],
-[[]b4_attribute_define[
-]b4_null_define[
-
-// This skeleton is based on C, yet compiles it as C++.
-// So expect warnings about C style casts.
-#if defined __clang__ && 306 <= __clang_major__ * 100 + __clang_minor__
-# pragma clang diagnostic ignored "-Wold-style-cast"
-#elif defined __GNUC__ && 406 <= __GNUC__ * 100 + __GNUC_MINOR__
-# pragma GCC diagnostic ignored "-Wold-style-cast"
-#endif
-
-// On MacOS, PTRDIFF_MAX is defined as long long, which Clang's
-// -pedantic reports as being a C++11 extension.
-#if defined __APPLE__ && YY_CPLUSPLUS < 201103L \
-    && defined __clang__ && 4 <= __clang_major__
-# pragma clang diagnostic ignored "-Wc++11-long-long"
-#endif
-
-#undef ]b4_symbol(empty, [id])[
-#define ]b4_symbol(empty, [id])[ ]b4_namespace_ref[::]b4_parser_class[::token::]b4_symbol(empty, [id])[
-#undef ]b4_symbol(eof, [id])[
-#define ]b4_symbol(eof, [id])[ ]b4_namespace_ref[::]b4_parser_class[::token::]b4_symbol(eof, [id])[
-#undef ]b4_symbol(error, [id])[
-#define ]b4_symbol(error, [id])[ ]b4_namespace_ref[::]b4_parser_class[::token::]b4_symbol(error, [id])[
-
-#ifndef ]b4_api_PREFIX[STYPE
-# define ]b4_api_PREFIX[STYPE ]b4_namespace_ref[::]b4_parser_class[::value_type
-#endif
-#ifndef ]b4_api_PREFIX[LTYPE
-# define ]b4_api_PREFIX[LTYPE ]b4_namespace_ref[::]b4_parser_class[::location_type
-#endif
-
-typedef ]b4_namespace_ref[::]b4_parser_class[::symbol_kind_type yysymbol_kind_t;
-
-// Expose C++ symbol kinds to C.
-]b4_define_symbol_kind(-2)dnl
-b4_symbol_foreach([b4_define_symbol_kind])])[
-]])
-
-
-m4_define([b4_undef_symbol_kind],
-[[#undef ]b4_symbol($1, kind_base)[
-]])
-
-
-# b4_glr_cc_cleanup
-# -----------------
-# Remove redirections for glr.c.
-m4_define([b4_glr_cc_cleanup],
-[[#undef ]b4_symbol(empty, [id])[
-#undef ]b4_symbol(eof, [id])[
-#undef ]b4_symbol(error, [id])[
-
-]b4_undef_symbol_kind(-2)dnl
-b4_symbol_foreach([b4_undef_symbol_kind])dnl
-])
-
-
-# b4_shared_declarations(hh|cc)
-# -----------------------------
-# Declaration that might either go into the header (if --header, $1 = hh)
-# or in the implementation file.
-m4_define([b4_shared_declarations],
-[m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
-b4_percent_code_get([[requires]])[
-#include <iostream>
-#include <stdexcept>
-#include <string>
-
-]b4_cxx_portability[
-]m4_ifdef([b4_location_include],
-          [[# include ]b4_location_include])[
-]b4_variant_if([b4_variant_includes])[
-
-// Whether we are compiled with exception support.
-#ifndef YY_EXCEPTIONS
-# if defined __GNUC__ && !defined __EXCEPTIONS
-#  define YY_EXCEPTIONS 0
-# else
-#  define YY_EXCEPTIONS 1
-# endif
-#endif
-
-]b4_YYDEBUG_define[
-
-]b4_namespace_open[
-
-]b4_bison_locations_if([m4_ifndef([b4_location_file],
-                                  [b4_location_define])])[
-
-  /// A Bison parser.
-  class ]b4_parser_class[
-  {
-  public:
-]b4_public_types_declare[
-
-    /// Build a parser object.
-    ]b4_parser_class[ (]b4_parse_param_decl[);
-    virtual ~]b4_parser_class[ ();
-
-    /// Parse.  An alias for parse ().
-    /// \returns  0 iff parsing succeeded.
-    int operator() ();
-
-    /// Parse.
-    /// \returns  0 iff parsing succeeded.
-    virtual int parse ();
-
-#if ]b4_api_PREFIX[DEBUG
-    /// The current debugging stream.
-    std::ostream& debug_stream () const;
-    /// Set the current debugging stream.
-    void set_debug_stream (std::ostream &);
-
-    /// Type for debugging levels.
-    typedef int debug_level_type;
-    /// The current debugging level.
-    debug_level_type debug_level () const;
-    /// Set the current debugging level.
-    void set_debug_level (debug_level_type l);
-#endif
-
-    /// Report a syntax error.]b4_locations_if([[
-    /// \param loc    where the syntax error is found.]])[
-    /// \param msg    a description of the syntax error.
-    virtual void error (]b4_locations_if([[const location_type& loc, ]])[const std::string& msg);
-
-# if ]b4_api_PREFIX[DEBUG
-  public:
-    /// \brief Report a symbol value on the debug stream.
-    /// \param yykind       The symbol kind.
-    /// \param yyvaluep     Its semantic value.]b4_locations_if([[
-    /// \param yylocationp  Its location.]])[
-    virtual void yy_symbol_value_print_ (symbol_kind_type yykind,
-                                         const value_type* yyvaluep]b4_locations_if([[,
-                                         const location_type* yylocationp]])[) const;
-    /// \brief Report a symbol on the debug stream.
-    /// \param yykind       The symbol kind.
-    /// \param yyvaluep     Its semantic value.]b4_locations_if([[
-    /// \param yylocationp  Its location.]])[
-    virtual void yy_symbol_print_ (symbol_kind_type yykind,
-                                   const value_type* yyvaluep]b4_locations_if([[,
-                                   const location_type* yylocationp]])[) const;
-  private:
-    /// Debug stream.
-    std::ostream* yycdebug_;
-#endif
-
-]b4_parse_param_vars[
-  };
-
-]b4_namespace_close[
-
-]b4_percent_code_get([[provides]])[
-]m4_popdef([b4_parse_param])dnl
-])[
-
-]b4_header_if(
-[b4_output_begin([b4_spec_header_file])
-b4_copyright([Skeleton interface for Bison GLR parsers in C++],
-             [2002-2015, 2018-2022, 2025-2026])[
-// C++ GLR parser skeleton written by Akim Demaille.
-
-]b4_disclaimer[
-]b4_cpp_guard_open([b4_spec_mapped_header_file])[
-]b4_shared_declarations[
-]b4_cpp_guard_close([b4_spec_mapped_header_file])[
-]b4_output_end])
-
-# Let glr.c (and b4_shared_declarations) believe that the user
-# arguments include the parser itself.
-m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_wrap]))
-m4_include(b4_skeletonsdir/[glr.c])
-m4_popdef([b4_parse_param])

data/skeletons/java.m4

@@ -1,503 +0,0 @@
-                                                            -*- Autoconf -*-
-
-# Java language support for Bison
-
-# Copyright (C) 2007-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-m4_include(b4_skeletonsdir/[c-like.m4])
-
-
-# b4_list2(LIST1, LIST2)
-# ----------------------
-# Join two lists with a comma if necessary.
-m4_define([b4_list2],
-          [$1[]m4_ifval(m4_quote($1), [m4_ifval(m4_quote($2), [[, ]])])[]$2])
-
-
-# b4_percent_define_get3(DEF, PRE, POST, NOT)
-# -------------------------------------------
-# Expand to the value of DEF surrounded by PRE and POST if it's %define'ed,
-# otherwise NOT.
-m4_define([b4_percent_define_get3],
-          [m4_ifval(m4_quote(b4_percent_define_get([$1])),
-                [$2[]b4_percent_define_get([$1])[]$3], [$4])])
-
-
-
-# b4_flag_value(BOOLEAN-FLAG)
-# ---------------------------
-m4_define([b4_flag_value], [b4_flag_if([$1], [true], [false])])
-
-
-# b4_parser_class_declaration
-# ---------------------------
-# The declaration of the parser class ("class YYParser"), with all its
-# qualifiers/annotations.
-b4_percent_define_default([[api.parser.abstract]], [[false]])
-b4_percent_define_default([[api.parser.final]],    [[false]])
-b4_percent_define_default([[api.parser.public]],   [[false]])
-b4_percent_define_default([[api.parser.strictfp]], [[false]])
-
-m4_define([b4_parser_class_declaration],
-[b4_percent_define_get3([api.parser.annotations], [], [ ])dnl
-b4_percent_define_flag_if([api.parser.public],   [public ])dnl
-b4_percent_define_flag_if([api.parser.abstract], [abstract ])dnl
-b4_percent_define_flag_if([api.parser.final],    [final ])dnl
-b4_percent_define_flag_if([api.parser.strictfp], [strictfp ])dnl
-[class ]b4_parser_class[]dnl
-b4_percent_define_get3([api.parser.extends], [ extends ])dnl
-b4_percent_define_get3([api.parser.implements], [ implements ])])
-
-
-# b4_lexer_if(TRUE, FALSE)
-# ------------------------
-m4_define([b4_lexer_if],
-[b4_percent_code_ifdef([[lexer]], [$1], [$2])])
-
-
-# b4_identification
-# -----------------
-m4_define([b4_identification],
-[[  /** Version number for the Bison executable that generated this parser.  */
-  public static final String bisonVersion = "]b4_version_string[";
-
-  /** Name of the skeleton that generated this parser.  */
-  public static final String bisonSkeleton = ]b4_skeleton[;
-]])
-
-
-## ------------ ##
-## Data types.  ##
-## ------------ ##
-
-# b4_int_type(MIN, MAX)
-# ---------------------
-# Return the smallest int type able to handle numbers ranging from
-# MIN to MAX (included).
-m4_define([b4_int_type],
-[m4_if(b4_ints_in($@,   [-128],   [127]), [1], [byte],
-       b4_ints_in($@, [-32768], [32767]), [1], [short],
-                                               [int])])
-
-# b4_int_type_for(NAME)
-# ---------------------
-# Return the smallest int type able to handle numbers ranging from
-# 'NAME_min' to 'NAME_max' (included).
-m4_define([b4_int_type_for],
-[b4_int_type($1_min, $1_max)])
-
-# b4_null
-# -------
-m4_define([b4_null], [null])
-
-
-# b4_typed_parser_table_define(TYPE, NAME, DATA, COMMENT)
-# -------------------------------------------------------
-# We use intermediate functions (e.g., yypact_init) to work around the
-# 64KB limit for JVM methods.  See
-# https://lists.gnu.org/r/help-bison/2008-11/msg00004.html.
-m4_define([b4_typed_parser_table_define],
-[m4_ifval([$4], [b4_comment([$4])
-  ])dnl
-[private static final ]$1[[] yy$2_ = yy$2_init();
-  private static final ]$1[[] yy$2_init()
-  {
-    return new ]$1[[]
-    {
-  ]$3[
-    };
-  }]])
-
-
-# b4_integral_parser_table_define(NAME, DATA, COMMENT)
-#-----------------------------------------------------
-m4_define([b4_integral_parser_table_define],
-[b4_typed_parser_table_define([b4_int_type_for([$2])], [$1], [$2], [$3])])
-
-
-## ------------- ##
-## Token kinds.  ##
-## ------------- ##
-
-
-# b4_token_enum(TOKEN-NUM)
-# ------------------------
-# Output the definition of this token as an enum.
-m4_define([b4_token_enum],
-[b4_token_visible_if([$1],
-    [m4_format([[    /** Token %s, to be returned by the scanner.  */
-    static final int %s = %s%s;
-]],
-               b4_symbol([$1], [tag]),
-               b4_symbol([$1], [id]),
-               b4_symbol([$1], b4_api_token_raw_if([[number]], [[code]])))])])
-
-
-# b4_token_enums
-# --------------
-# Output the definition of the tokens (if there are) as enums.
-m4_define([b4_token_enums],
-[b4_any_token_visible_if([    /* Token kinds.  */
-b4_symbol_foreach([b4_token_enum])])])
-
-
-
-## -------------- ##
-## Symbol kinds.  ##
-## -------------- ##
-
-
-# b4_symbol_kind(NUM)
-# -------------------
-m4_define([b4_symbol_kind],
-[SymbolKind.b4_symbol_kind_base($@)])
-
-
-# b4_symbol_enum(SYMBOL-NUM)
-# --------------------------
-# Output the definition of this symbol as an enum.
-m4_define([b4_symbol_enum],
-[m4_format([    %-30s %s],
-           m4_format([[%s(%s)%s]],
-                     b4_symbol([$1], [kind_base]),
-                     [$1],
-                     m4_if([$1], b4_last_symbol, [[;]], [[,]])),
-           [b4_symbol_tag_comment([$1])])])
-
-
-# b4_declare_symbol_enum
-# ----------------------
-# The definition of the symbol internal numbers as an enum.
-m4_define([b4_declare_symbol_enum],
-[[  public enum SymbolKind
-  {
-]b4_symbol_foreach([b4_symbol_enum])[
-
-    private final int yycode_;
-
-    SymbolKind (int n) {
-      this.yycode_ = n;
-    }
-
-    private static final SymbolKind[] values_ = {
-      ]m4_map_args_sep([b4_symbol_kind(], [)], [,
-      ], b4_symbol_numbers)[
-    };
-
-    static final SymbolKind get(int code) {
-      return values_[code];
-    }
-
-    public final int getCode() {
-      return this.yycode_;
-    }
-
-]b4_parse_error_bmatch(
-[simple\|verbose],
-[[    /* Return YYSTR after stripping away unnecessary quotes and
-       backslashes, so that it's suitable for yyerror.  The heuristic is
-       that double-quoting is unnecessary unless the string contains an
-       apostrophe, a comma, or backslash (other than backslash-backslash).
-       YYSTR is taken from yytname.  */
-    private static String yytnamerr_(String yystr)
-    {
-      if (yystr.charAt (0) == '"')
-        {
-          StringBuffer yyr = new StringBuffer();
-          strip_quotes: for (int i = 1; i < yystr.length(); i++)
-            switch (yystr.charAt(i))
-              {
-              case '\'':
-              case ',':
-                break strip_quotes;
-
-              case '\\':
-                if (yystr.charAt(++i) != '\\')
-                  break strip_quotes;
-                /* Fall through.  */
-              default:
-                yyr.append(yystr.charAt(i));
-                break;
-
-              case '"':
-                return yyr.toString();
-              }
-        }
-      return yystr;
-    }
-
-    /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
-       First, the terminals, then, starting at \a YYNTOKENS_, nonterminals.  */
-    ]b4_typed_parser_table_define([String], [tname], [b4_tname])[
-
-    /* The user-facing name of this symbol.  */
-    public final String getName() {
-      return yytnamerr_(yytname_[yycode_]);
-    }
-]],
-[custom\|detailed],
-[[    /* YYNAMES_[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
-       First, the terminals, then, starting at \a YYNTOKENS_, nonterminals.  */
-    ]b4_typed_parser_table_define([String], [names], [b4_symbol_names])[
-
-    /* The user-facing name of this symbol.  */
-    public final String getName() {
-      return yynames_[yycode_];
-    }]])[
-  };
-]])])
-
-
-
-# b4_case(ID, CODE, [COMMENTS])
-# -----------------------------
-# We need to fool Java's stupid unreachable code detection.
-m4_define([b4_case],
-[  case $1:m4_ifval([$3], [ b4_comment([$3])])
-  if (yyn == $1)
-    $2;
-  break;
-])
-
-
-# b4_predicate_case(LABEL, CONDITIONS)
-# ------------------------------------
-m4_define([b4_predicate_case],
-[  case $1:
-     if (! ($2)) YYERROR;
-    break;
-])
-
-
-## -------- ##
-## Checks.  ##
-## -------- ##
-
-b4_percent_define_check_kind([[api.value.type]],    [code], [deprecated])
-
-b4_percent_define_check_kind([[annotations]],       [code], [deprecated])
-b4_percent_define_check_kind([[extends]],           [code], [deprecated])
-b4_percent_define_check_kind([[implements]],        [code], [deprecated])
-b4_percent_define_check_kind([[init_throws]],       [code], [deprecated])
-b4_percent_define_check_kind([[lex_throws]],        [code], [deprecated])
-b4_percent_define_check_kind([[api.parser.class]],  [code], [deprecated])
-b4_percent_define_check_kind([[throws]],            [code], [deprecated])
-
-
-
-## ---------------- ##
-## Default values.  ##
-## ---------------- ##
-
-m4_define([b4_yystype], [b4_percent_define_get([[api.value.type]])])
-b4_percent_define_default([[api.value.type]], [[Object]])
-b4_percent_define_default([[api.symbol.prefix]], [[S_]])
-
-# b4_api_prefix, b4_api_PREFIX
-# ----------------------------
-# Corresponds to %define api.prefix
-b4_percent_define_default([[api.prefix]], [[YY]])
-m4_define([b4_api_prefix],
-[b4_percent_define_get([[api.prefix]])])
-m4_define([b4_api_PREFIX],
-[m4_toupper(b4_api_prefix)])
-
-# b4_prefix
-# ---------
-# If the %name-prefix is not given, it is api.prefix.
-m4_define_default([b4_prefix], [b4_api_prefix])
-
-b4_percent_define_default([[api.parser.class]], [b4_prefix[]Parser])
-m4_define([b4_parser_class], [b4_percent_define_get([[api.parser.class]])])
-
-b4_percent_define_default([[lex_throws]], [[java.io.IOException]])
-m4_define([b4_lex_throws], [b4_percent_define_get([[lex_throws]])])
-
-b4_percent_define_default([[throws]], [])
-m4_define([b4_throws], [b4_percent_define_get([[throws]])])
-
-b4_percent_define_default([[init_throws]], [])
-m4_define([b4_init_throws], [b4_percent_define_get([[init_throws]])])
-
-b4_percent_define_default([[api.location.type]], [Location])
-m4_define([b4_location_type], [b4_percent_define_get([[api.location.type]])])
-
-b4_percent_define_default([[api.position.type]], [Position])
-m4_define([b4_position_type], [b4_percent_define_get([[api.position.type]])])
-
-
-## ----------------- ##
-## Semantic Values.  ##
-## ----------------- ##
-
-
-# b4_symbol_translate(STRING)
-# ---------------------------
-# Used by "bison" in the array of symbol names to mark those that
-# require translation.
-m4_define([b4_symbol_translate],
-[[i18n($1)]])
-
-
-# b4_trans(STRING)
-# ----------------
-# Translate a string if i18n is enabled.  Avoid collision with b4_translate.
-m4_define([b4_trans],
-[b4_has_translations_if([i18n($1)], [$1])])
-
-
-
-# b4_symbol_value(VAL, [SYMBOL-NUM], [TYPE-TAG])
-# ----------------------------------------------
-# See README.
-m4_define([b4_symbol_value],
-[m4_ifval([$3],
-          [(($3)($1))],
-          [m4_ifval([$2],
-                    [b4_symbol_if([$2], [has_type],
-                                  [((b4_symbol([$2], [type]))($1))],
-                                  [$1])],
-                    [$1])])])
-
-
-# b4_lhs_value([SYMBOL-NUM], [TYPE])
-# ----------------------------------
-# See README.
-m4_define([b4_lhs_value], [yyval])
-
-
-# b4_rhs_data(RULE-LENGTH, POS)
-# -----------------------------
-# See README.
-m4_define([b4_rhs_data],
-[yystack.valueAt (b4_subtract($@))])
-
-# b4_rhs_value(RULE-LENGTH, POS, SYMBOL-NUM, [TYPE])
-# --------------------------------------------------
-# See README.
-#
-# In this simple implementation, %token and %type have class names
-# between the angle brackets.
-m4_define([b4_rhs_value],
-[b4_symbol_value([b4_rhs_data([$1], [$2])], [$3], [$4])])
-
-
-# b4_lhs_location()
-# -----------------
-# Expansion of @$.
-m4_define([b4_lhs_location],
-[(yyloc)])
-
-
-# b4_rhs_location(RULE-LENGTH, POS)
-# ---------------------------------
-# Expansion of @POS, where the current rule has RULE-LENGTH symbols
-# on RHS.
-m4_define([b4_rhs_location],
-[yystack.locationAt (b4_subtract($@))])
-
-
-# b4_lex_param
-# b4_parse_param
-# --------------
-# If defined, b4_lex_param arrives double quoted, but below we prefer
-# it to be single quoted.  Same for b4_parse_param.
-
-# TODO: should be in bison.m4
-m4_define_default([b4_lex_param], [[]])
-m4_define([b4_lex_param], b4_lex_param)
-m4_define([b4_parse_param], b4_parse_param)
-
-# b4_lex_param_decl
-# -----------------
-# Extra formal arguments of the constructor.
-m4_define([b4_lex_param_decl],
-[m4_ifset([b4_lex_param],
-          [b4_remove_comma([$1],
-                           b4_param_decls(b4_lex_param))],
-          [$1])])
-
-m4_define([b4_param_decls],
-          [m4_map([b4_param_decl], [$@])])
-m4_define([b4_param_decl], [, $1])
-
-m4_define([b4_remove_comma], [m4_ifval(m4_quote($1), [$1, ], [])m4_shift2($@)])
-
-
-
-# b4_parse_param_decl
-# -------------------
-# Extra formal arguments of the constructor.
-m4_define([b4_parse_param_decl],
-[m4_ifset([b4_parse_param],
-          [b4_remove_comma([$1],
-                           b4_param_decls(b4_parse_param))],
-          [$1])])
-
-
-
-# b4_lex_param_call
-# -----------------
-# Delegating the lexer parameters to the lexer constructor.
-m4_define([b4_lex_param_call],
-          [m4_ifset([b4_lex_param],
-                    [b4_remove_comma([$1],
-                                     b4_param_calls(b4_lex_param))],
-                    [$1])])
-m4_define([b4_param_calls],
-          [m4_map([b4_param_call], [$@])])
-m4_define([b4_param_call], [, $2])
-
-
-
-# b4_parse_param_cons
-# -------------------
-# Extra initialisations of the constructor.
-m4_define([b4_parse_param_cons],
-          [m4_ifset([b4_parse_param],
-                    [b4_constructor_calls(b4_parse_param)])])
-
-m4_define([b4_constructor_calls],
-          [m4_map([b4_constructor_call], [$@])])
-m4_define([b4_constructor_call],
-          [this.$2 = $2;
-          ])
-
-
-
-# b4_parse_param_vars
-# -------------------
-# Extra instance variables.
-m4_define([b4_parse_param_vars],
-          [m4_ifset([b4_parse_param],
-                    [
-    /* User arguments.  */
-b4_var_decls(b4_parse_param)])])
-
-m4_define([b4_var_decls],
-          [m4_map_sep([b4_var_decl], [
-], [$@])])
-m4_define([b4_var_decl],
-          [    protected final $1;])
-
-
-
-# b4_maybe_throws(THROWS)
-# -----------------------
-# Expand to either an empty string or "throws THROWS".
-m4_define([b4_maybe_throws],
-          [m4_ifval($1, [ throws $1])])

data/skeletons/location.cc

@@ -1,381 +0,0 @@
-# C++ skeleton for Bison
-
-# Copyright (C) 2002-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-m4_pushdef([b4_copyright_years],
-           [2002-2015, 2018-2022, 2025-2026])
-
-
-# b4_location_file
-# ----------------
-# Name of the file containing the position/location class,
-# if we want this file.
-b4_percent_define_check_file([b4_location_file],
-                             [[api.location.file]],
-                             b4_header_if([[location.hh]]))
-
-# b4_location_include
-# -------------------
-# If location.hh is to be generated, the name under which should it be
-# included.
-#
-# b4_location_path
-# ----------------
-# The path to use for the CPP guard.
-m4_ifdef([b4_location_file],
-[m4_define([b4_location_include],
-           [b4_percent_define_get([[api.location.include]],
-                                  ["b4_location_file"])])
- m4_define([b4_location_path],
-           b4_percent_define_get([[api.location.include]],
-                                 ["b4_mapped_dir_prefix[]b4_location_file"]))
- m4_define([b4_location_path],
-           m4_substr(m4_defn([b4_location_path]), 1, m4_eval(m4_len(m4_defn([b4_location_path])) - 2)))
- ])
-
-
-# b4_position_file
-# ----------------
-# Name of the file containing the position class, if we want this file.
-b4_header_if(
-  [b4_required_version_if(
-    [30200], [],
-    [m4_ifdef([b4_location_file],
-              [m4_define([b4_position_file], [position.hh])])])])
-
-
-
-# b4_location_define
-# ------------------
-# Define the position and location classes.
-m4_define([b4_location_define],
-[[  /// A point in a source file.
-  class position
-  {
-  public:
-    /// Type for file name.
-    typedef ]b4_percent_define_get([[api.filename.type]])[ filename_type;
-    /// Type for line and column numbers.
-    typedef int counter_type;
-]m4_ifdef([b4_location_constructors], [[
-    /// Construct a position.
-    explicit position (filename_type* f = YY_NULLPTR,
-                       counter_type l = ]b4_location_initial_line[,
-                       counter_type c = ]b4_location_initial_column[)
-      : filename (f)
-      , line (l)
-      , column (c)
-    {}
-
-]])[
-    /// Initialization.
-    void initialize (filename_type* fn = YY_NULLPTR,
-                     counter_type l = ]b4_location_initial_line[,
-                     counter_type c = ]b4_location_initial_column[)
-    {
-      filename = fn;
-      line = l;
-      column = c;
-    }
-
-    /** \name Line and Column related manipulators
-     ** \{ */
-    /// (line related) Advance to the COUNT next lines.
-    void lines (counter_type count = 1)
-    {
-      if (count)
-        {
-          column = ]b4_location_initial_column[;
-          line = add_ (line, count, ]b4_location_initial_line[);
-        }
-    }
-
-    /// (column related) Advance to the COUNT next columns.
-    void columns (counter_type count = 1)
-    {
-      column = add_ (column, count, ]b4_location_initial_column[);
-    }
-    /** \} */
-
-    /// File name to which this position refers.
-    filename_type* filename;
-    /// Current line number.
-    counter_type line;
-    /// Current column number.
-    counter_type column;
-
-  private:
-    /// Compute max (min, lhs+rhs).
-    static counter_type add_ (counter_type lhs, counter_type rhs, counter_type min)
-    {
-      return lhs + rhs < min ? min : lhs + rhs;
-    }
-  };
-
-  /// Add \a width columns, in place.
-  inline position&
-  operator+= (position& res, position::counter_type width)
-  {
-    res.columns (width);
-    return res;
-  }
-
-  /// Add \a width columns.
-  inline position
-  operator+ (position res, position::counter_type width)
-  {
-    return res += width;
-  }
-
-  /// Subtract \a width columns, in place.
-  inline position&
-  operator-= (position& res, position::counter_type width)
-  {
-    return res += -width;
-  }
-
-  /// Subtract \a width columns.
-  inline position
-  operator- (position res, position::counter_type width)
-  {
-    return res -= width;
-  }
-]b4_percent_define_flag_if([[define_location_comparison]], [[
-  /// Compare two position objects.
-  inline bool
-  operator== (const position& pos1, const position& pos2)
-  {
-    return (pos1.line == pos2.line
-            && pos1.column == pos2.column
-            && (pos1.filename == pos2.filename
-                || (pos1.filename && pos2.filename
-                    && *pos1.filename == *pos2.filename)));
-  }
-
-  /// Compare two position objects.
-  inline bool
-  operator!= (const position& pos1, const position& pos2)
-  {
-    return !(pos1 == pos2);
-  }
-]])[
-  /** \brief Intercept output stream redirection.
-   ** \param ostr the destination output stream
-   ** \param pos a reference to the position to redirect
-   */
-  template <typename YYChar>
-  std::basic_ostream<YYChar>&
-  operator<< (std::basic_ostream<YYChar>& ostr, const position& pos)
-  {
-    if (pos.filename)
-      ostr << *pos.filename << ':';
-    return ostr << pos.line << '.' << pos.column;
-  }
-
-  /// Two points in a source file.
-  class location
-  {
-  public:
-    /// Type for file name.
-    typedef position::filename_type filename_type;
-    /// Type for line and column numbers.
-    typedef position::counter_type counter_type;
-]m4_ifdef([b4_location_constructors], [
-    /// Construct a location from \a b to \a e.
-    location (const position& b, const position& e)
-      : begin (b)
-      , end (e)
-    {}
-
-    /// Construct a 0-width location in \a p.
-    explicit location (const position& p = position ())
-      : begin (p)
-      , end (p)
-    {}
-
-    /// Construct a 0-width location in \a f, \a l, \a c.
-    explicit location (filename_type* f,
-                       counter_type l = ]b4_location_initial_line[,
-                       counter_type c = ]b4_location_initial_column[)
-      : begin (f, l, c)
-      , end (f, l, c)
-    {}
-
-])[
-    /// Initialization.
-    void initialize (filename_type* f = YY_NULLPTR,
-                     counter_type l = ]b4_location_initial_line[,
-                     counter_type c = ]b4_location_initial_column[)
-    {
-      begin.initialize (f, l, c);
-      end = begin;
-    }
-
-    /** \name Line and Column related manipulators
-     ** \{ */
-  public:
-    /// Reset initial location to final location.
-    void step ()
-    {
-      begin = end;
-    }
-
-    /// Extend the current location to the COUNT next columns.
-    void columns (counter_type count = 1)
-    {
-      end += count;
-    }
-
-    /// Extend the current location to the COUNT next lines.
-    void lines (counter_type count = 1)
-    {
-      end.lines (count);
-    }
-    /** \} */
-
-
-  public:
-    /// Beginning of the located region.
-    position begin;
-    /// End of the located region.
-    position end;
-  };
-
-  /// Join two locations, in place.
-  inline location&
-  operator+= (location& res, const location& end)
-  {
-    res.end = end.end;
-    return res;
-  }
-
-  /// Join two locations.
-  inline location
-  operator+ (location res, const location& end)
-  {
-    return res += end;
-  }
-
-  /// Add \a width columns to the end position, in place.
-  inline location&
-  operator+= (location& res, location::counter_type width)
-  {
-    res.columns (width);
-    return res;
-  }
-
-  /// Add \a width columns to the end position.
-  inline location
-  operator+ (location res, location::counter_type width)
-  {
-    return res += width;
-  }
-
-  /// Subtract \a width columns to the end position, in place.
-  inline location&
-  operator-= (location& res, location::counter_type width)
-  {
-    return res += -width;
-  }
-
-  /// Subtract \a width columns to the end position.
-  inline location
-  operator- (location res, location::counter_type width)
-  {
-    return res -= width;
-  }
-]b4_percent_define_flag_if([[define_location_comparison]], [[
-  /// Compare two location objects.
-  inline bool
-  operator== (const location& loc1, const location& loc2)
-  {
-    return loc1.begin == loc2.begin && loc1.end == loc2.end;
-  }
-
-  /// Compare two location objects.
-  inline bool
-  operator!= (const location& loc1, const location& loc2)
-  {
-    return !(loc1 == loc2);
-  }
-]])[
-  /** \brief Intercept output stream redirection.
-   ** \param ostr the destination output stream
-   ** \param loc a reference to the location to redirect
-   **
-   ** Avoid duplicate information.
-   */
-  template <typename YYChar>
-  std::basic_ostream<YYChar>&
-  operator<< (std::basic_ostream<YYChar>& ostr, const location& loc)
-  {
-    location::counter_type end_col
-      = 0 < loc.end.column ? loc.end.column - 1 : 0;
-    ostr << loc.begin;
-    if (loc.end.filename
-        && (!loc.begin.filename
-            || *loc.begin.filename != *loc.end.filename))
-      ostr << '-' << loc.end.filename << ':' << loc.end.line << '.' << end_col;
-    else if (loc.begin.line < loc.end.line)
-      ostr << '-' << loc.end.line << '.' << end_col;
-    else if (loc.begin.column < end_col)
-      ostr << '-' << end_col;
-    return ostr;
-  }
-]])
-
-
-m4_ifdef([b4_position_file], [[
-]b4_output_begin([b4_dir_prefix], [b4_position_file])[
-]b4_generated_by[
-// Starting with Bison 3.2, this file is useless: the structure it
-// used to define is now defined in "]b4_location_file[".
-//
-// To get rid of this file:
-// 1. add '%require "3.2"' (or newer) to your grammar file
-// 2. remove references to this file from your build system
-// 3. if you used to include it, include "]b4_location_file[" instead.
-
-#include ]b4_location_include[
-]b4_output_end[
-]])
-
-
-m4_ifdef([b4_location_file], [[
-]b4_output_begin([b4_dir_prefix], [b4_location_file])[
-]b4_copyright([Locations for Bison parsers in C++])[
-/**
- ** \file ]b4_location_path[
- ** Define the ]b4_namespace_ref[::location class.
- */
-
-]b4_cpp_guard_open([b4_location_path])[
-
-# include <iostream>
-# include <string>
-
-]b4_null_define[
-
-]b4_namespace_open[
-]b4_location_define[
-]b4_namespace_close[
-]b4_cpp_guard_close([b4_location_path])[
-]b4_output_end[
-]])
-
-
-m4_popdef([b4_copyright_years])

data/skeletons/stack.hh

@@ -1,158 +0,0 @@
-# C++ skeleton for Bison
-
-# Copyright (C) 2002-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-
-# b4_stack_file
-# -------------
-# Name of the file containing the stack class, if we want this file.
-b4_header_if([b4_required_version_if([30200], [],
-                                     [m4_define([b4_stack_file], [stack.hh])])])
-
-
-# b4_stack_define
-# ---------------
-m4_define([b4_stack_define],
-[[    /// A stack with random access from its top.
-    template <typename T, typename S = std::vector<T> >
-    class stack
-    {
-    public:
-      // Hide our reversed order.
-      typedef typename S::iterator iterator;
-      typedef typename S::const_iterator const_iterator;
-      typedef typename S::size_type size_type;
-      typedef typename std::ptrdiff_t index_type;
-
-      stack (size_type n = 200) YY_NOEXCEPT
-        : seq_ (n)
-      {}
-
-#if 201103L <= YY_CPLUSPLUS
-      /// Non copyable.
-      stack (const stack&) = delete;
-      /// Non copyable.
-      stack& operator= (const stack&) = delete;
-#endif
-
-      /// Random access.
-      ///
-      /// Index 0 returns the topmost element.
-      const T&
-      operator[] (index_type i) const
-      {
-        return seq_[size_type (size () - 1 - i)];
-      }
-
-      /// Random access.
-      ///
-      /// Index 0 returns the topmost element.
-      T&
-      operator[] (index_type i)
-      {
-        return seq_[size_type (size () - 1 - i)];
-      }
-
-      /// Steal the contents of \a t.
-      ///
-      /// Close to move-semantics.
-      void
-      push (YY_MOVE_REF (T) t)
-      {
-        seq_.push_back (T ());
-        operator[] (0).move (t);
-      }
-
-      /// Pop elements from the stack.
-      void
-      pop (std::ptrdiff_t n = 1) YY_NOEXCEPT
-      {
-        for (; 0 < n; --n)
-          seq_.pop_back ();
-      }
-
-      /// Pop all elements from the stack.
-      void
-      clear () YY_NOEXCEPT
-      {
-        seq_.clear ();
-      }
-
-      /// Number of elements on the stack.
-      index_type
-      size () const YY_NOEXCEPT
-      {
-        return index_type (seq_.size ());
-      }
-
-      /// Iterator on top of the stack (going downwards).
-      const_iterator
-      begin () const YY_NOEXCEPT
-      {
-        return seq_.begin ();
-      }
-
-      /// Bottom of the stack.
-      const_iterator
-      end () const YY_NOEXCEPT
-      {
-        return seq_.end ();
-      }
-
-      /// Present a slice of the top of a stack.
-      class slice
-      {
-      public:
-        slice (const stack& stack, index_type range) YY_NOEXCEPT
-          : stack_ (stack)
-          , range_ (range)
-        {}
-
-        const T&
-        operator[] (index_type i) const
-        {
-          return stack_[range_ - i];
-        }
-
-      private:
-        const stack& stack_;
-        index_type range_;
-      };
-
-    private:
-#if YY_CPLUSPLUS < 201103L
-      /// Non copyable.
-      stack (const stack&);
-      /// Non copyable.
-      stack& operator= (const stack&);
-#endif
-      /// The wrapped container.
-      S seq_;
-    };
-]])
-
-m4_ifdef([b4_stack_file],
-[b4_output_begin([b4_dir_prefix], [b4_stack_file])[
-]b4_generated_by[
-// Starting with Bison 3.2, this file is useless: the structure it
-// used to define is now defined with the parser itself.
-//
-// To get rid of this file:
-// 1. add '%require "3.2"' (or newer) to your grammar file
-// 2. remove references to this file from your build system.
-]b4_output_end[
-]])

data/skeletons/traceon.m4

@@ -1,2 +0,0 @@
-dnl GNU M4 treats -dV in a position-independent manner.
-m4_debugmode(V)m4_traceon()dnl

data/skeletons/variant.hh

@@ -1,526 +0,0 @@
-# C++ skeleton for Bison
-
-# Copyright (C) 2002-2015, 2018-2022, 2025-2026 Free Software
-# Foundation, Inc.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-
-## --------- ##
-## variant.  ##
-## --------- ##
-
-# b4_assert
-# ---------
-# The name of YY_ASSERT.
-m4_define([b4_assert],
-          [b4_api_PREFIX[]_ASSERT])
-
-
-# b4_symbol_variant(YYTYPE, YYVAL, ACTION, [ARGS])
-# ------------------------------------------------
-# Run some ACTION ("build", or "destroy") on YYVAL of symbol type
-# YYTYPE.
-m4_define([b4_symbol_variant],
-[m4_pushdef([b4_dollar_dollar],
-            [$2.$3< $][3 > (m4_shift3($@))])dnl
-switch ($1)
-    {
-b4_type_foreach([_b4_type_action])[]dnl
-      default:
-        break;
-    }
-m4_popdef([b4_dollar_dollar])dnl
-])
-
-
-# _b4_char_sizeof_counter
-# -----------------------
-# A counter used by _b4_char_sizeof_dummy to create fresh symbols.
-m4_define([_b4_char_sizeof_counter],
-[0])
-
-# _b4_char_sizeof_dummy
-# ---------------------
-# At each call return a new C++ identifier.
-m4_define([_b4_char_sizeof_dummy],
-[m4_define([_b4_char_sizeof_counter], m4_incr(_b4_char_sizeof_counter))dnl
-dummy[]_b4_char_sizeof_counter])
-
-
-# b4_char_sizeof(SYMBOL-NUMS)
-# ---------------------------
-# To be mapped on the list of type names to produce:
-#
-#    char dummy1[sizeof (type_name_1)];
-#    char dummy2[sizeof (type_name_2)];
-#
-# for defined type names.
-m4_define([b4_char_sizeof],
-[b4_symbol_if([$1], [has_type],
-[
-m4_map([      b4_symbol_tag_comment], [$@])dnl
-      char _b4_char_sizeof_dummy@{sizeof (b4_symbol([$1], [type]))@};
-])])
-
-
-# b4_variant_includes
-# -------------------
-# The needed includes for variants support.
-m4_define([b4_variant_includes],
-[b4_parse_assert_if([[#include <typeinfo>
-#ifndef ]b4_assert[
-# include <cassert>
-# define ]b4_assert[ assert
-#endif
-]])])
-
-
-
-## -------------------------- ##
-## Adjustments for variants.  ##
-## -------------------------- ##
-
-
-# b4_value_type_declare
-# ---------------------
-# Define value_type.
-m4_define([b4_value_type_declare],
-[[  /// A buffer to store and retrieve objects.
-  ///
-  /// Sort of a variant, but does not keep track of the nature
-  /// of the stored data, since that knowledge is available
-  /// via the current parser state.
-  class value_type
-  {
-  public:
-    /// Type of *this.
-    typedef value_type self_type;
-
-    /// Empty construction.
-    value_type () YY_NOEXCEPT
-      : yyraw_ ()]b4_parse_assert_if([
-      , yytypeid_ (YY_NULLPTR)])[
-    {}
-
-    /// Construct and fill.
-    template <typename T>
-    value_type (YY_RVREF (T) t)]b4_parse_assert_if([
-      : yytypeid_ (&typeid (T))])[
-    {]b4_parse_assert_if([[
-      ]b4_assert[ (sizeof (T) <= size);]])[
-      new (yyas_<T> ()) T (YY_MOVE (t));
-    }
-
-#if 201103L <= YY_CPLUSPLUS
-    /// Non copyable.
-    value_type (const self_type&) = delete;
-    /// Non copyable.
-    self_type& operator= (const self_type&) = delete;
-#endif
-
-    /// Destruction, allowed only if empty.
-    ~value_type () YY_NOEXCEPT
-    {]b4_parse_assert_if([
-      ]b4_assert[ (!yytypeid_);
-    ])[}
-
-# if 201103L <= YY_CPLUSPLUS
-    /// Instantiate a \a T in here from \a t.
-    template <typename T, typename... U>
-    T&
-    emplace (U&&... u)
-    {]b4_parse_assert_if([[
-      ]b4_assert[ (!yytypeid_);
-      ]b4_assert[ (sizeof (T) <= size);
-      yytypeid_ = & typeid (T);]])[
-      return *new (yyas_<T> ()) T (std::forward <U>(u)...);
-    }
-# else
-    /// Instantiate an empty \a T in here.
-    template <typename T>
-    T&
-    emplace ()
-    {]b4_parse_assert_if([[
-      ]b4_assert[ (!yytypeid_);
-      ]b4_assert[ (sizeof (T) <= size);
-      yytypeid_ = & typeid (T);]])[
-      return *new (yyas_<T> ()) T ();
-    }
-
-    /// Instantiate a \a T in here from \a t.
-    template <typename T>
-    T&
-    emplace (const T& t)
-    {]b4_parse_assert_if([[
-      ]b4_assert[ (!yytypeid_);
-      ]b4_assert[ (sizeof (T) <= size);
-      yytypeid_ = & typeid (T);]])[
-      return *new (yyas_<T> ()) T (t);
-    }
-# endif
-
-    /// Instantiate an empty \a T in here.
-    /// Obsolete, use emplace.
-    template <typename T>
-    T&
-    build ()
-    {
-      return emplace<T> ();
-    }
-
-    /// Instantiate a \a T in here from \a t.
-    /// Obsolete, use emplace.
-    template <typename T>
-    T&
-    build (const T& t)
-    {
-      return emplace<T> (t);
-    }
-
-    /// Accessor to a built \a T.
-    template <typename T>
-    T&
-    as () YY_NOEXCEPT
-    {]b4_parse_assert_if([[
-      ]b4_assert[ (yytypeid_);
-      ]b4_assert[ (*yytypeid_ == typeid (T));
-      ]b4_assert[ (sizeof (T) <= size);]])[
-      return *yyas_<T> ();
-    }
-
-    /// Const accessor to a built \a T (for %printer).
-    template <typename T>
-    const T&
-    as () const YY_NOEXCEPT
-    {]b4_parse_assert_if([[
-      ]b4_assert[ (yytypeid_);
-      ]b4_assert[ (*yytypeid_ == typeid (T));
-      ]b4_assert[ (sizeof (T) <= size);]])[
-      return *yyas_<T> ();
-    }
-
-    /// Swap the content with \a that, of same type.
-    ///
-    /// Both variants must be built beforehand, because swapping the actual
-    /// data requires reading it (with as()), and this is not possible on
-    /// unconstructed variants: it would require some dynamic testing, which
-    /// should not be the variant's responsibility.
-    /// Swapping between built and (possibly) non-built is done with
-    /// self_type::move ().
-    template <typename T>
-    void
-    swap (self_type& that) YY_NOEXCEPT
-    {]b4_parse_assert_if([[
-      ]b4_assert[ (yytypeid_);
-      ]b4_assert[ (*yytypeid_ == *that.yytypeid_);]])[
-      std::swap (as<T> (), that.as<T> ());
-    }
-
-    /// Move the content of \a that to this.
-    ///
-    /// Destroys \a that.
-    template <typename T>
-    void
-    move (self_type& that)
-    {
-# if 201103L <= YY_CPLUSPLUS
-      emplace<T> (std::move (that.as<T> ()));
-# else
-      emplace<T> ();
-      swap<T> (that);
-# endif
-      that.destroy<T> ();
-    }
-
-# if 201103L <= YY_CPLUSPLUS
-    /// Move the content of \a that to this.
-    template <typename T>
-    void
-    move (self_type&& that)
-    {
-      emplace<T> (std::move (that.as<T> ()));
-      that.destroy<T> ();
-    }
-#endif
-
-    /// Copy the content of \a that to this.
-    template <typename T>
-    void
-    copy (const self_type& that)
-    {
-      emplace<T> (that.as<T> ());
-    }
-
-    /// Destroy the stored \a T.
-    template <typename T>
-    void
-    destroy ()
-    {
-      as<T> ().~T ();]b4_parse_assert_if([
-      yytypeid_ = YY_NULLPTR;])[
-    }
-
-  private:
-#if YY_CPLUSPLUS < 201103L
-    /// Non copyable.
-    value_type (const self_type&);
-    /// Non copyable.
-    self_type& operator= (const self_type&);
-#endif
-
-    /// Accessor to raw memory as \a T.
-    template <typename T>
-    T*
-    yyas_ () YY_NOEXCEPT
-    {
-      void *yyp = yyraw_;
-      return static_cast<T*> (yyp);
-     }
-
-    /// Const accessor to raw memory as \a T.
-    template <typename T>
-    const T*
-    yyas_ () const YY_NOEXCEPT
-    {
-      const void *yyp = yyraw_;
-      return static_cast<const T*> (yyp);
-     }
-
-    /// An auxiliary type to compute the largest semantic type.
-    union union_type
-    {]b4_type_foreach([b4_char_sizeof])[    };
-
-    /// The size of the largest semantic type.
-    enum { size = sizeof (union_type) };
-
-    /// A buffer to store semantic values.
-    union
-    {
-      /// Strongest alignment constraints.
-      long double yyalign_me_;
-      /// A buffer large enough to store any of the semantic values.
-      char yyraw_[size];
-    };]b4_parse_assert_if([
-
-    /// Whether the content is built: if defined, the name of the stored type.
-    const std::type_info *yytypeid_;])[
-  };
-]])
-
-
-# How the semantic value is extracted when using variants.
-
-# b4_symbol_value(VAL, SYMBOL-NUM, [TYPE])
-# ----------------------------------------
-# See README.
-m4_define([b4_symbol_value],
-[m4_ifval([$3],
-          [$1.as< $3 > ()],
-          [m4_ifval([$2],
-                    [b4_symbol_if([$2], [has_type],
-                                  [$1.as < b4_symbol([$2], [type]) > ()],
-                                  [$1])],
-                    [$1])])])
-
-# b4_symbol_value_template(VAL, SYMBOL-NUM, [TYPE])
-# -------------------------------------------------
-# Same as b4_symbol_value, but used in a template method.
-m4_define([b4_symbol_value_template],
-[m4_ifval([$3],
-          [$1.template as< $3 > ()],
-          [m4_ifval([$2],
-                    [b4_symbol_if([$2], [has_type],
-                                  [$1.template as < b4_symbol([$2], [type]) > ()],
-                                  [$1])],
-                    [$1])])])
-
-
-
-## ------------- ##
-## make_SYMBOL.  ##
-## ------------- ##
-
-
-# _b4_includes_tokens(SYMBOL-NUM...)
-# ----------------------------------
-# Expands to non-empty iff one of the SYMBOL-NUM denotes
-# a token.
-m4_define([_b4_is_token],
-          [b4_symbol_if([$1], [is_token], [1])])
-m4_define([_b4_includes_tokens],
-          [m4_map([_b4_is_token], [$@])])
-
-
-# _b4_token_maker_define(SYMBOL-NUM)
-# ----------------------------------
-# Declare make_SYMBOL for SYMBOL-NUM.  Use at class-level.
-m4_define([_b4_token_maker_define],
-[b4_token_visible_if([$1],
-[#if 201103L <= YY_CPLUSPLUS
-      static
-      symbol_type
-      make_[]_b4_symbol([$1], [id]) (b4_join(
-                 b4_symbol_if([$1], [has_type],
-                 [b4_symbol([$1], [type]) v]),
-                 b4_locations_if([location_type l])))
-      {
-        return symbol_type (b4_join([token::b4_symbol([$1], [id])],
-                                    b4_symbol_if([$1], [has_type], [std::move (v)]),
-                                    b4_locations_if([std::move (l)])));
-      }
-#else
-      static
-      symbol_type
-      make_[]_b4_symbol([$1], [id]) (b4_join(
-                 b4_symbol_if([$1], [has_type],
-                 [const b4_symbol([$1], [type])& v]),
-                 b4_locations_if([const location_type& l])))
-      {
-        return symbol_type (b4_join([token::b4_symbol([$1], [id])],
-                                    b4_symbol_if([$1], [has_type], [v]),
-                                    b4_locations_if([l])));
-      }
-#endif
-])])
-
-
-# b4_token_kind(SYMBOL-NUM)
-# -------------------------
-# Some tokens don't have an ID.
-m4_define([b4_token_kind],
-[b4_symbol_if([$1], [has_id],
-              [token::b4_symbol([$1], [id])],
-              [b4_symbol([$1], [code])])])
-
-
-# _b4_tok_in(SYMBOL-NUM, ...)
-# ---------------------------
-# See b4_tok_in below.  The SYMBOL-NUMs... are tokens only.
-#
-# We iterate over the tokens to group them by "range" of token numbers (not
-# symbols numbers!).
-#
-# b4_fst is the start of that range.
-# b4_prev is the previous value.
-# b4_val is the current value.
-# If b4_val is the successor of b4_prev in token numbers, update the latter,
-#   otherwise emit the code for range b4_fst .. b4_prev.
-# $1 is also used as a terminator in the foreach, but it will not be printed.
-#
-m4_define([_b4_tok_in],
-[m4_pushdef([b4_prev], [$1])dnl
-m4_pushdef([b4_fst], [$1])dnl
-m4_pushdef([b4_sep], [])dnl
-m4_foreach([b4_val], m4_dquote(m4_shift($@, $1)),
-           [m4_if(b4_symbol(b4_val, [code]), m4_eval(b4_symbol(b4_prev, [code]) + 1), [],
-                  [b4_sep[]m4_if(b4_fst, b4_prev,
-                         [tok == b4_token_kind(b4_fst)],
-                         [(b4_token_kind(b4_fst) <= tok && tok <= b4_token_kind(b4_prev))])[]dnl
-m4_define([b4_fst], b4_val)dnl
-m4_define([b4_sep], [
-                   || ])])dnl
-m4_define([b4_prev], b4_val)])dnl
-m4_popdef([b4_sep])dnl
-m4_popdef([b4_fst])dnl
-m4_popdef([b4_prev])dnl
-])
-
-
-# _b4_filter_tokens(SYMBOL-NUM, ...)
-# ----------------------------------
-# Expand as the list of tokens amongst SYMBOL-NUM.
-m4_define([_b4_filter_tokens],
-[m4_pushdef([b4_sep])dnl
-m4_foreach([b4_val], [$@],
-           [b4_symbol_if(b4_val, [is_token], [b4_sep[]b4_val[]m4_define([b4_sep], [,])])])dnl
-m4_popdef([b4_sep])dnl
-])
-
-
-# b4_tok_in(SYMBOL-NUM, ...)
-# ---------------------------
-# A C++ conditional that checks that `tok` is a member of this list of symbol
-# numbers.
-m4_define([b4_tok_in],
-          [_$0(_b4_filter_tokens($@))])
-
-
-
-
-# _b4_symbol_constructor_define(SYMBOL-NUM...)
-# --------------------------------------------
-# Define a symbol_type constructor common to all the SYMBOL-NUM (they
-# have the same type).  Use at class-level.
-m4_define([_b4_symbol_constructor_define],
-[m4_ifval(_b4_includes_tokens($@),
-[[#if 201103L <= YY_CPLUSPLUS
-      symbol_type (]b4_join(
-          [int tok],
-          b4_symbol_if([$1], [has_type],
-                       [b4_symbol([$1], [type]) v]),
-          b4_locations_if([location_type l]))[)
-        : super_type (]b4_join([token_kind_type (tok)],
-                               b4_symbol_if([$1], [has_type], [std::move (v)]),
-                               b4_locations_if([std::move (l)]))[)
-#else
-      symbol_type (]b4_join(
-          [int tok],
-          b4_symbol_if([$1], [has_type],
-                       [const b4_symbol([$1], [type])& v]),
-          b4_locations_if([const location_type& l]))[)
-        : super_type (]b4_join([token_kind_type (tok)],
-                               b4_symbol_if([$1], [has_type], [v]),
-                               b4_locations_if([l]))[)
-#endif
-      {]b4_parse_assert_if([[
-#if !defined _MSC_VER || defined __clang__
-        ]b4_assert[ (]b4_tok_in($@)[);
-#endif
-      ]])[}
-]])])
-
-
-# b4_basic_symbol_constructor_define(SYMBOL-NUM)
-# ----------------------------------------------
-# Generate a constructor for basic_symbol from given type.
-m4_define([b4_basic_symbol_constructor_define],
-[[#if 201103L <= YY_CPLUSPLUS
-      basic_symbol (]b4_join(
-          [typename Base::kind_type t],
-          b4_symbol_if([$1], [has_type], [b4_symbol([$1], [type])&& v]),
-          b4_locations_if([location_type&& l]))[)
-        : Base (t)]b4_symbol_if([$1], [has_type], [
-        , value (std::move (v))])[]b4_locations_if([
-        , location (std::move (l))])[
-      {}
-#else
-      basic_symbol (]b4_join(
-          [typename Base::kind_type t],
-          b4_symbol_if([$1], [has_type], [const b4_symbol([$1], [type])& v]),
-          b4_locations_if([const location_type& l]))[)
-        : Base (t)]b4_symbol_if([$1], [has_type], [
-        , value (v)])[]b4_locations_if([
-        , location (l)])[
-      {}
-#endif
-]])
-
-
-# b4_token_constructor_define
-# ---------------------------
-# Define the overloaded versions of make_FOO for all the token kinds.
-m4_define([b4_token_constructor_define],
-[    // Implementation of make_symbol for each token kind.
-b4_symbol_foreach([_b4_token_maker_define])])

data/xslt/bison.xsl

@@ -3,8 +3,7 @@
 <!--
     bison.xsl - common templates for Bison XSLT.
 
-    Copyright (C) 2007-2015, 2018-2022, 2025-2026 Free Software
-    Foundation, Inc.
+    Copyright (C) 2007-2010 Free Software Foundation, Inc.
 
     This file is part of Bison, the GNU Compiler Compiler.
 
@@ -19,12 +18,12 @@
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
   -->
 
 <xsl:stylesheet version="1.0"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-  xmlns:bison="https://www.gnu.org/software/bison/">
+  xmlns:bison="http://www.gnu.org/software/bison/">
 
 <xsl:key
   name="bison:symbolByName"
@@ -91,16 +90,4 @@
   <xsl:value-of select="string-length(translate($conflict-data, 's', ''))"/>
 </xsl:template>
 
-<xsl:template name="space">
-  <xsl:param name="repeat">0</xsl:param>
-  <xsl:param name="fill" select="' '"/>
-  <xsl:if test="number($repeat) &gt;= 1">
-    <xsl:call-template name="space">
-      <xsl:with-param name="repeat" select="$repeat - 1"/>
-      <xsl:with-param name="fill" select="$fill"/>
-    </xsl:call-template>
-    <xsl:value-of select="$fill"/>
-  </xsl:if>
-</xsl:template>
-
 </xsl:stylesheet>

data/xslt/xml2dot.xsl

@@ -3,8 +3,7 @@
 <!--
     xml2dot.xsl - transform Bison XML Report into DOT.
 
-    Copyright (C) 2007-2015, 2018-2022, 2025-2026 Free Software
-    Foundation, Inc.
+    Copyright (C) 2007-2010 Free Software Foundation, Inc.
 
     This file is part of Bison, the GNU Compiler Compiler.
 
@@ -19,14 +18,14 @@
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
     Written by Wojciech Polak <polak@gnu.org>.
   -->
 
 <xsl:stylesheet version="1.0"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-  xmlns:bison="https://www.gnu.org/software/bison/">
+  xmlns:bison="http://www.gnu.org/software/bison/">
 
 <xsl:import href="bison.xsl"/>
 <xsl:output method="text" encoding="UTF-8" indent="no"/>
@@ -36,31 +35,11 @@
 </xsl:template>
 
 <xsl:template match="bison-xml-report">
-  <xsl:text>// Generated by GNU Bison </xsl:text>
-  <xsl:value-of select="@version"/>
-  <xsl:text>.&#10;</xsl:text>
-  <xsl:text>// Report bugs to &lt;</xsl:text>
-  <xsl:value-of select="@bug-report"/>
-  <xsl:text>&gt;.&#10;</xsl:text>
-  <xsl:text>// Home page: &lt;</xsl:text>
-  <xsl:value-of select="@url"/>
-  <xsl:text>&gt;.&#10;&#10;</xsl:text>
-  <xsl:apply-templates select="automaton">
-    <xsl:with-param name="filename" select="filename"/>
-  </xsl:apply-templates>
+  <xsl:apply-templates select="automaton"/>
 </xsl:template>
 
 <xsl:template match="automaton">
-  <xsl:param name="filename"/>
-  <xsl:text>digraph "</xsl:text>
-  <xsl:call-template name="escape">
-    <xsl:with-param name="subject" select="$filename"/>
-  </xsl:call-template>
-  <xsl:text>"&#10;{
-  node [fontname = courier, shape = box, colorscheme = paired6]
-  edge [fontname = courier]
-
-</xsl:text>
+  <xsl:text>digraph Automaton {&#10;</xsl:text>
   <xsl:apply-templates select="state"/>
   <xsl:text>}&#10;</xsl:text>
 </xsl:template>
@@ -69,87 +48,11 @@
   <xsl:call-template name="output-node">
     <xsl:with-param name="number" select="@number"/>
     <xsl:with-param name="label">
+      <xsl:value-of select="@number"/>
       <xsl:apply-templates select="itemset/item"/>
     </xsl:with-param>
   </xsl:call-template>
   <xsl:apply-templates select="actions/transitions"/>
-  <xsl:apply-templates select="actions/reductions">
-    <xsl:with-param name="staten">
-      <xsl:value-of select="@number"/>
-    </xsl:with-param>
-  </xsl:apply-templates>
-</xsl:template>
-
-<xsl:template match="actions/reductions">
-  <xsl:param name="staten"/>
-  <xsl:for-each select='reduction'>
-    <!-- These variables are needed because the current context can't be
-         referred to directly in XPath expressions. -->
-    <xsl:variable name="rul">
-      <xsl:value-of select="@rule"/>
-    </xsl:variable>
-    <xsl:variable name="ena">
-      <xsl:value-of select="@enabled"/>
-    </xsl:variable>
-    <!-- The foreach's body is protected by this, so that we are actually
-         going to iterate once per reduction rule, and not per lookahead. -->
-    <xsl:if test='not(preceding-sibling::*[@rule=$rul and @enabled=$ena])'>
-      <xsl:variable name="rule">
-        <xsl:choose>
-          <!-- The acceptation state is referred to as 'accept' in the XML, but
-               just as '0' in the DOT. -->
-          <xsl:when test="@rule='accept'">
-            <xsl:text>0</xsl:text>
-          </xsl:when>
-          <xsl:otherwise>
-            <xsl:value-of select="@rule"/>
-          </xsl:otherwise>
-        </xsl:choose>
-      </xsl:variable>
-
-      <!-- The edge's beginning -->
-      <xsl:call-template name="reduction-edge-start">
-        <xsl:with-param name="state" select="$staten"/>
-        <xsl:with-param name="rule" select="$rule"/>
-        <xsl:with-param name="enabled" select="@enabled"/>
-      </xsl:call-template>
-
-      <!-- The edge's tokens -->
-      <!-- Don't show labels for the default action. In other cases, there will
-           always be at least one token, so 'label="[]"' will not occur. -->
-      <xsl:if test='$rule!=0 and not(../reduction[@enabled=$ena and @rule=$rule and @symbol="$default"])'>
-        <xsl:text>label="[</xsl:text>
-        <xsl:for-each select='../reduction[@enabled=$ena and @rule=$rule]'>
-          <xsl:call-template name="escape">
-            <xsl:with-param name="subject" select="@symbol"/>
-          </xsl:call-template>
-          <xsl:if test="position() != last ()">
-            <xsl:text>, </xsl:text>
-          </xsl:if>
-        </xsl:for-each>
-        <xsl:text>]", </xsl:text>
-      </xsl:if>
-
-      <!-- The edge's end -->
-      <xsl:text>style=solid]&#10;</xsl:text>
-
-      <!-- The diamond representing the reduction -->
-      <xsl:call-template name="reduction-node">
-        <xsl:with-param name="state" select="$staten"/>
-        <xsl:with-param name="rule" select="$rule"/>
-        <xsl:with-param name="color">
-          <xsl:choose>
-            <xsl:when test='@enabled="true"'>
-              <xsl:text>3</xsl:text>
-            </xsl:when>
-            <xsl:otherwise>
-              <xsl:text>5</xsl:text>
-            </xsl:otherwise>
-          </xsl:choose>
-        </xsl:with-param>
-      </xsl:call-template>
-    </xsl:if>
-  </xsl:for-each>
 </xsl:template>
 
 <xsl:template match="actions/transitions">
@@ -157,56 +60,23 @@
 </xsl:template>
 
 <xsl:template match="item">
-  <xsl:param name="prev-rule-number"
-    select="preceding-sibling::item[1]/@rule-number"/>
   <xsl:apply-templates select="key('bison:ruleByNumber', @rule-number)">
-    <xsl:with-param name="dot" select="@dot"/>
-    <xsl:with-param name="num" select="@rule-number"/>
-    <xsl:with-param name="prev-lhs"
-      select="key('bison:ruleByNumber', $prev-rule-number)/lhs[text()]"
-   />
+    <xsl:with-param name="point" select="@point"/>
   </xsl:apply-templates>
   <xsl:apply-templates select="lookaheads"/>
 </xsl:template>
 
 <xsl:template match="rule">
-  <xsl:param name="dot"/>
-  <xsl:param name="num"/>
-  <xsl:param name="prev-lhs"/>
+  <xsl:param name="point"/>
   <xsl:text>&#10;</xsl:text>
-  <xsl:choose>
-    <xsl:when test="$num &lt; 10">
-      <xsl:text>  </xsl:text>
-    </xsl:when>
-    <xsl:when test="$num &lt; 100">
-      <xsl:text> </xsl:text>
-    </xsl:when>
-    <xsl:otherwise>
-      <xsl:text></xsl:text>
-    </xsl:otherwise>
-  </xsl:choose>
-  <xsl:value-of select="$num"/>
-  <xsl:text> </xsl:text>
-  <xsl:choose>
-  <xsl:when test="$prev-lhs = lhs[text()]">
-      <xsl:call-template name="lpad">
-        <xsl:with-param name="str" select="'|'"/>
-        <xsl:with-param name="pad" select="number(string-length(lhs[text()])) + 1"/>
-      </xsl:call-template>
-    </xsl:when>
-    <xsl:otherwise>
-      <xsl:value-of select="lhs"/>
-      <xsl:text>:</xsl:text>
-    </xsl:otherwise>
-  </xsl:choose>
-  <xsl:if test="$dot = 0">
+  <xsl:value-of select="lhs"/>
+  <xsl:text> -&gt;</xsl:text>
+  <xsl:if test="$point = 0">
     <xsl:text> .</xsl:text>
   </xsl:if>
-
-  <!-- RHS -->
   <xsl:for-each select="rhs/symbol|rhs/empty">
     <xsl:apply-templates select="."/>
-    <xsl:if test="$dot = position()">
+    <xsl:if test="$point = position()">
       <xsl:text> .</xsl:text>
     </xsl:if>
   </xsl:for-each>
@@ -217,12 +87,10 @@
   <xsl:value-of select="."/>
 </xsl:template>
 
-<xsl:template match="empty">
-  <xsl:text> %empty</xsl:text>
-</xsl:template>
+<xsl:template match="empty"/>
 
 <xsl:template match="lookaheads">
-  <xsl:text>  [</xsl:text>
+  <xsl:text>[</xsl:text>
   <xsl:apply-templates select="symbol"/>
   <xsl:text>]</xsl:text>
 </xsl:template>
@@ -234,70 +102,26 @@
   </xsl:if>
 </xsl:template>
 
-<xsl:template name="reduction-edge-start">
-  <xsl:param name="state"/>
-  <xsl:param name="rule"/>
-  <xsl:param name="enabled"/>
-
-  <xsl:text>  </xsl:text>
-  <xsl:value-of select="$state"/>
-  <xsl:text> -> "</xsl:text>
-  <xsl:value-of select="$state"/>
-  <xsl:text>R</xsl:text>
-  <xsl:value-of select="$rule"/>
-  <xsl:if test='$enabled = "false"'>
-    <xsl:text>d</xsl:text>
-  </xsl:if>
-  <xsl:text>" [</xsl:text>
-</xsl:template>
-
-<xsl:template name="reduction-node">
-  <xsl:param name="state"/>
-  <xsl:param name="rule"/>
-  <xsl:param name="color"/>
-
-  <xsl:text> "</xsl:text>
-  <xsl:value-of select="$state"/>
-  <xsl:text>R</xsl:text>
-  <xsl:value-of select="$rule"/>
-  <xsl:if test="$color = 5">
-    <xsl:text>d</xsl:text>
-  </xsl:if>
-  <xsl:text>" [label="</xsl:text>
-  <xsl:choose>
-  <xsl:when test="$rule = 0">
-    <xsl:text>Acc", fillcolor=1</xsl:text>
-  </xsl:when>
-  <xsl:otherwise>
-    <xsl:text>R</xsl:text>
-    <xsl:value-of select="$rule"/>
-    <xsl:text>", fillcolor=</xsl:text>
-    <xsl:value-of select="$color"/>
-  </xsl:otherwise>
-  </xsl:choose>
-  <xsl:text>, shape=diamond, style=filled]&#10;</xsl:text>
-</xsl:template>
-
 <xsl:template match="transition">
   <xsl:call-template name="output-edge">
     <xsl:with-param name="src" select="../../../@number"/>
     <xsl:with-param name="dst" select="@state"/>
     <xsl:with-param name="style">
       <xsl:choose>
-        <xsl:when test="@symbol = 'error'">
-          <xsl:text>dotted</xsl:text>
-        </xsl:when>
-        <xsl:when test="@type = 'shift'">
-          <xsl:text>solid</xsl:text>
-        </xsl:when>
-        <xsl:otherwise>
-          <xsl:text>dashed</xsl:text>
-        </xsl:otherwise>
+	<xsl:when test="@symbol = 'error'">
+	  <xsl:text>dotted</xsl:text>
+	</xsl:when>
+	<xsl:when test="@type = 'shift'">
+	  <xsl:text>solid</xsl:text>
+	</xsl:when>
+	<xsl:otherwise>
+	  <xsl:text>dashed</xsl:text>
+	</xsl:otherwise>
       </xsl:choose>
     </xsl:with-param>
     <xsl:with-param name="label">
       <xsl:if test="not(@symbol = 'error')">
-        <xsl:value-of select="@symbol"/>
+	<xsl:value-of select="@symbol"/>
       </xsl:if>
     </xsl:with-param>
   </xsl:call-template>
@@ -309,13 +133,10 @@
   <xsl:text>  </xsl:text>
   <xsl:value-of select="$number"/>
   <xsl:text> [label="</xsl:text>
-  <xsl:text>State </xsl:text>
-  <xsl:value-of select="$number"/>
-  <xsl:text>\n</xsl:text>
   <xsl:call-template name="escape">
     <xsl:with-param name="subject" select="$label"/>
   </xsl:call-template>
-  <xsl:text>\l"]&#10;</xsl:text>
+  <xsl:text>"]&#10;</xsl:text>
 </xsl:template>
 
 <xsl:template name="output-edge">
@@ -356,7 +177,7 @@
       </xsl:call-template>
     </xsl:with-param>
     <xsl:with-param name="search" select="'&#10;'"/>
-    <xsl:with-param name="replace" select="'\l'"/>
+    <xsl:with-param name="replace" select="'\n'"/>
   </xsl:call-template>
 </xsl:template>
 
@@ -375,28 +196,11 @@
         <xsl:with-param name="search" select="$search"/>
         <xsl:with-param name="replace" select="$replace"/>
       </xsl:call-template>
-    </xsl:when>
+    </xsl:when> 
     <xsl:otherwise>
-      <xsl:value-of select="$subject"/>
+      <xsl:value-of select="$subject"/>  
     </xsl:otherwise>
-  </xsl:choose>
-</xsl:template>
-
-<xsl:template name="lpad">
-  <xsl:param name="str" select="''"/>
-  <xsl:param name="pad" select="0"/>
-  <xsl:variable name="diff" select="$pad - string-length($str)" />
-  <xsl:choose>
-    <xsl:when test="$diff &lt; 0">
-      <xsl:value-of select="$str"/>
-    </xsl:when>
-    <xsl:otherwise>
-      <xsl:call-template name="space">
-        <xsl:with-param name="repeat" select="$diff"/>
-      </xsl:call-template>
-      <xsl:value-of select="$str"/>
-    </xsl:otherwise>
-  </xsl:choose>
+  </xsl:choose>            
 </xsl:template>
 
 </xsl:stylesheet>

data/xslt/xml2text.xsl

@@ -3,8 +3,7 @@
 <!--
     xml2text.xsl - transform Bison XML Report into plain text.
 
-    Copyright (C) 2007-2015, 2018-2022, 2025-2026 Free Software
-    Foundation, Inc.
+    Copyright (C) 2007-2010 Free Software Foundation, Inc.
 
     This file is part of Bison, the GNU Compiler Compiler.
 
@@ -19,14 +18,14 @@
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
     Written by Wojciech Polak <polak@gnu.org>.
   -->
 
 <xsl:stylesheet version="1.0"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-  xmlns:bison="https://www.gnu.org/software/bison/">
+  xmlns:bison="http://www.gnu.org/software/bison/">
 
 <xsl:import href="bison.xsl"/>
 <xsl:output method="text" encoding="UTF-8" indent="no"/>
@@ -53,7 +52,7 @@
   <xsl:if test="nonterminal[@usefulness='useless-in-grammar']">
     <xsl:text>Nonterminals useless in grammar&#10;&#10;</xsl:text>
     <xsl:for-each select="nonterminal[@usefulness='useless-in-grammar']">
-      <xsl:text>    </xsl:text>
+      <xsl:text>   </xsl:text>
       <xsl:value-of select="@name"/>
       <xsl:text>&#10;</xsl:text>
     </xsl:for-each>
@@ -66,7 +65,7 @@
     <xsl:text>Terminals unused in grammar&#10;&#10;</xsl:text>
     <xsl:for-each select="terminal[@usefulness='unused-in-grammar']">
       <xsl:sort select="@symbol-number" data-type="number"/>
-      <xsl:text>    </xsl:text>
+      <xsl:text>   </xsl:text>
       <xsl:value-of select="@name"/>
       <xsl:text>&#10;</xsl:text>
     </xsl:for-each>
@@ -137,7 +136,6 @@
 </xsl:template>
 
 <xsl:template match="terminal">
-  <xsl:text>    </xsl:text>
   <xsl:value-of select="@name"/>
   <xsl:call-template name="line-wrap">
     <xsl:with-param name="first-line-length">
@@ -150,9 +148,6 @@
     </xsl:with-param>
     <xsl:with-param name="line-length" select="66" />
     <xsl:with-param name="text">
-      <xsl:if test="string-length(@type) != 0">
-        <xsl:value-of select="concat(' &lt;', @type, '&gt;')"/>
-      </xsl:if>
       <xsl:value-of select="concat(' (', @token-number, ')')"/>
       <xsl:for-each select="key('bison:ruleByRhs', @name)">
         <xsl:value-of select="concat(' ', @number)"/>
@@ -162,18 +157,14 @@
 </xsl:template>
 
 <xsl:template match="nonterminal">
-  <xsl:text>    </xsl:text>
   <xsl:value-of select="@name"/>
-  <xsl:if test="string-length(@type) != 0">
-    <xsl:value-of select="concat(' &lt;', @type, '&gt;')"/>
-  </xsl:if>
   <xsl:value-of select="concat(' (', @symbol-number, ')')"/>
   <xsl:text>&#10;</xsl:text>
   <xsl:variable name="output">
     <xsl:call-template name="line-wrap">
       <xsl:with-param name="line-length" select="66" />
       <xsl:with-param name="text">
-        <xsl:text>        </xsl:text>
+        <xsl:text>    </xsl:text>
         <xsl:if test="key('bison:ruleByLhs', @name)">
           <xsl:text>on@left:</xsl:text>
           <xsl:for-each select="key('bison:ruleByLhs', @name)">
@@ -182,7 +173,7 @@
         </xsl:if>
         <xsl:if test="key('bison:ruleByRhs', @name)">
           <xsl:if test="key('bison:ruleByLhs', @name)">
-            <xsl:text>&#10;        </xsl:text>
+            <xsl:text>, </xsl:text>
           </xsl:if>
           <xsl:text>on@right:</xsl:text>
           <xsl:for-each select="key('bison:ruleByRhs', @name)">
@@ -239,7 +230,7 @@
 <xsl:template match="automaton/state">
   <xsl:param name="pad"/>
   <xsl:text>&#10;&#10;</xsl:text>
-  <xsl:text>State </xsl:text>
+  <xsl:text>state </xsl:text>
   <xsl:value-of select="@number"/>
   <xsl:text>&#10;&#10;</xsl:text>
   <xsl:apply-templates select="itemset/item">
@@ -262,9 +253,9 @@
     <xsl:text>&#10;</xsl:text>
     <xsl:apply-templates select="transition[@type = $type]">
       <xsl:with-param name="pad">
-        <xsl:call-template name="max-width-symbol">
-          <xsl:with-param name="node" select="transition[@type = $type]"/>
-        </xsl:call-template>
+	<xsl:call-template name="max-width-symbol">
+	  <xsl:with-param name="node" select="transition[@type = $type]"/>
+	</xsl:call-template>
       </xsl:with-param>
     </xsl:apply-templates>
   </xsl:if>
@@ -275,9 +266,9 @@
     <xsl:text>&#10;</xsl:text>
     <xsl:apply-templates select="error">
       <xsl:with-param name="pad">
-        <xsl:call-template name="max-width-symbol">
-          <xsl:with-param name="node" select="error"/>
-        </xsl:call-template>
+	<xsl:call-template name="max-width-symbol">
+	  <xsl:with-param name="node" select="error"/>
+	</xsl:call-template>
       </xsl:with-param>
     </xsl:apply-templates>
   </xsl:if>
@@ -288,9 +279,9 @@
     <xsl:text>&#10;</xsl:text>
     <xsl:apply-templates select="reduction">
       <xsl:with-param name="pad">
-        <xsl:call-template name="max-width-symbol">
-          <xsl:with-param name="node" select="reduction"/>
-        </xsl:call-template>
+	<xsl:call-template name="max-width-symbol">
+	  <xsl:with-param name="node" select="reduction"/>
+	</xsl:call-template>
       </xsl:with-param>
     </xsl:apply-templates>
   </xsl:if>
@@ -299,7 +290,7 @@
 <xsl:template match="item">
   <xsl:param name="pad"/>
   <xsl:param name="prev-rule-number"
-             select="preceding-sibling::item[1]/@rule-number"/>
+	     select="preceding-sibling::item[1]/@rule-number"/>
   <xsl:apply-templates
     select="key('bison:ruleByNumber', current()/@rule-number)"
   >
@@ -309,7 +300,7 @@
       name="prev-lhs"
       select="key('bison:ruleByNumber', $prev-rule-number)/lhs[text()]"
    />
-    <xsl:with-param name="dot" select="@dot"/>
+    <xsl:with-param name="point" select="@point"/>
     <xsl:with-param name="lookaheads">
       <xsl:apply-templates select="lookaheads"/>
     </xsl:with-param>
@@ -320,7 +311,7 @@
   <xsl:param name="itemset"/>
   <xsl:param name="pad"/>
   <xsl:param name="prev-lhs"/>
-  <xsl:param name="dot"/>
+  <xsl:param name="point"/>
   <xsl:param name="lookaheads"/>
 
   <xsl:if test="$itemset != 'true' and not($prev-lhs = lhs[text()])">
@@ -338,14 +329,14 @@
   <xsl:choose>
     <xsl:when test="$itemset != 'true' and $prev-lhs = lhs[text()]">
       <xsl:call-template name="lpad">
-        <xsl:with-param name="str" select="'|'"/>
-        <xsl:with-param name="pad" select="number(string-length(lhs[text()])) + 1"/>
+	<xsl:with-param name="str" select="'|'"/>
+	<xsl:with-param name="pad" select="number(string-length(lhs[text()])) + 1"/>
       </xsl:call-template>
     </xsl:when>
     <xsl:when test="$itemset = 'true' and $prev-lhs = lhs[text()]">
       <xsl:call-template name="lpad">
-        <xsl:with-param name="str" select="'|'"/>
-        <xsl:with-param name="pad" select="number(string-length(lhs[text()])) + 1"/>
+	<xsl:with-param name="str" select="'|'"/>
+	<xsl:with-param name="pad" select="number(string-length(lhs[text()])) + 1"/>
       </xsl:call-template>
     </xsl:when>
     <xsl:otherwise>
@@ -356,12 +347,17 @@
 
   <!-- RHS -->
   <xsl:for-each select="rhs/*">
-    <xsl:if test="position() = $dot + 1">
-      <xsl:text> •</xsl:text>
+    <xsl:if test="position() = $point + 1">
+      <xsl:text> .</xsl:text>
     </xsl:if>
-    <xsl:apply-templates select="."/>
-    <xsl:if test="position() = last() and position() = $dot">
-      <xsl:text> •</xsl:text>
+    <xsl:if test="$itemset = 'true' and name(.) != 'empty'">
+      <xsl:apply-templates select="."/>
+    </xsl:if>
+    <xsl:if test="$itemset != 'true'">
+      <xsl:apply-templates select="."/>
+    </xsl:if>
+    <xsl:if test="position() = last() and position() = $point">
+      <xsl:text> .</xsl:text>
     </xsl:if>
   </xsl:for-each>
   <xsl:if test="$lookaheads">
@@ -377,7 +373,7 @@
 </xsl:template>
 
 <xsl:template match="empty">
-  <xsl:text> %empty</xsl:text>
+  <xsl:text> /* empty */</xsl:text>
 </xsl:template>
 
 <xsl:template match="lookaheads">
@@ -446,7 +442,7 @@
       <xsl:value-of select="@rule"/>
       <xsl:text> (</xsl:text>
       <xsl:value-of
-          select="key('bison:ruleByNumber', current()/@rule)/lhs[text()]"/>
+	  select="key('bison:ruleByNumber', current()/@rule)/lhs[text()]"/>
       <xsl:text>)</xsl:text>
     </xsl:otherwise>
   </xsl:choose>
@@ -483,9 +479,9 @@
   <xsl:variable name="longest">
     <xsl:for-each select="$node">
       <xsl:sort data-type="number" select="string-length(@symbol)"
-                order="descending"/>
+		order="descending"/>
       <xsl:if test="position() = 1">
-        <xsl:value-of select="string-length(@symbol)"/>
+	<xsl:value-of select="string-length(@symbol)"/>
       </xsl:if>
     </xsl:for-each>
   </xsl:variable>
@@ -502,7 +498,7 @@
     </xsl:when>
     <xsl:otherwise>
       <xsl:call-template name="space">
-        <xsl:with-param name="repeat" select="$diff"/>
+	<xsl:with-param name="repeat" select="$diff"/>
       </xsl:call-template>
       <xsl:value-of select="$str"/>
     </xsl:otherwise>
@@ -520,12 +516,24 @@
     <xsl:otherwise>
       <xsl:value-of select="$str"/>
       <xsl:call-template name="space">
-        <xsl:with-param name="repeat" select="$diff"/>
+	<xsl:with-param name="repeat" select="$diff"/>
       </xsl:call-template>
     </xsl:otherwise>
   </xsl:choose>
 </xsl:template>
 
+<xsl:template name="space">
+  <xsl:param name="repeat">0</xsl:param>
+  <xsl:param name="fill" select="' '"/>
+  <xsl:if test="number($repeat) &gt;= 1">
+    <xsl:call-template name="space">
+      <xsl:with-param name="repeat" select="$repeat - 1"/>
+      <xsl:with-param name="fill" select="$fill"/>
+    </xsl:call-template>
+    <xsl:value-of select="$fill"/>
+  </xsl:if>
+</xsl:template>
+
 <xsl:template name="line-wrap">
   <xsl:param name="line-length"/> <!-- required -->
   <xsl:param name="first-line-length" select="$line-length"/>

data/xslt/xml2xhtml.xsl

@@ -3,8 +3,7 @@
 <!--
     xml2html.xsl - transform Bison XML Report into XHTML.
 
-    Copyright (C) 2007-2015, 2018-2022, 2025-2026 Free Software
-    Foundation, Inc.
+    Copyright (C) 2007-2010 Free Software Foundation, Inc.
 
     This file is part of Bison, the GNU Compiler Compiler.
 
@@ -19,7 +18,7 @@
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
     Written by Wojciech Polak <polak@gnu.org>.
   -->
@@ -27,38 +26,37 @@
 <xsl:stylesheet version="1.0"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
   xmlns="http://www.w3.org/1999/xhtml"
-  xmlns:bison="https://www.gnu.org/software/bison/">
+  xmlns:bison="http://www.gnu.org/software/bison/">
 
 <xsl:import href="bison.xsl"/>
 
 <xsl:output method="xml" encoding="UTF-8"
-            doctype-public="-//W3C//DTD XHTML 1.0 Strict//EN"
-            doctype-system="http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"
-            indent="yes"/>
+	    doctype-public="-//W3C//DTD XHTML 1.0 Strict//EN"
+	    doctype-system="http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"
+	    indent="yes"/>
 
 <xsl:template match="/">
   <html>
     <head>
-      <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/>
       <title>
-        <xsl:value-of select="bison-xml-report/filename"/>
-        <xsl:text> - GNU Bison XML Automaton Report</xsl:text>
+	<xsl:value-of select="bison-xml-report/filename"/>
+	<xsl:text> - GNU Bison XML Automaton Report</xsl:text>
       </title>
       <style type="text/css"><![CDATA[
       body {
         font-family: "Nimbus Sans L", Arial, sans-serif;
-        font-size: 9pt;
+	font-size: 9pt;
       }
       a:link {
-        color: #1f00ff;
-        text-decoration: none;
+ 	color: #1f00ff;
+	text-decoration: none;
       }
       a:visited {
-        color: #1f00ff;
-        text-decoration: none;
+ 	color: #1f00ff;
+	text-decoration: none;
       }
       a:hover {
-        color: red;
+ 	color: red;
       }
       #menu a {
         text-decoration: underline;
@@ -76,7 +74,7 @@
       ol.lower-alpha {
         list-style-type: lower-alpha;
       }
-      .dot {
+      .point {
         color: #cc0000;
       }
       #footer {
@@ -89,7 +87,7 @@
       <xsl:apply-templates select="bison-xml-report"/>
       <xsl:text>&#10;&#10;</xsl:text>
       <div id="footer"><hr />This document was generated using
-      <a href="https://www.gnu.org/software/bison/" title="GNU Bison">
+      <a href="http://www.gnu.org/software/bison/" title="GNU Bison">
       GNU Bison <xsl:value-of select="/bison-xml-report/@version"/></a>
       XML Automaton Report.<br />
       <!-- default copying notice -->
@@ -111,21 +109,21 @@
     <li>
       <a href="#reductions">Reductions</a>
       <ul class="lower-alpha">
-        <li><a href="#nonterminals_useless_in_grammar">Nonterminals useless in grammar</a></li>
-        <li><a href="#terminals_unused_in_grammar">Terminals unused in grammar</a></li>
-        <li><a href="#rules_useless_in_grammar">Rules useless in grammar</a></li>
-        <xsl:if test="grammar/rules/rule[@usefulness='useless-in-parser']">
-          <li><a href="#rules_useless_in_parser">Rules useless in parser due to conflicts</a></li>
-        </xsl:if>
+	<li><a href="#nonterminals_useless_in_grammar">Nonterminals useless in grammar</a></li>
+	<li><a href="#terminals_unused_in_grammar">Terminals unused in grammar</a></li>
+	<li><a href="#rules_useless_in_grammar">Rules useless in grammar</a></li>
+	<xsl:if test="grammar/rules/rule[@usefulness='useless-in-parser']">
+	  <li><a href="#rules_useless_in_parser">Rules useless in parser due to conflicts</a></li>
+	</xsl:if>
       </ul>
     </li>
     <li><a href="#conflicts">Conflicts</a></li>
     <li>
       <a href="#grammar">Grammar</a>
       <ul class="lower-alpha">
-        <li><a href="#grammar">Itemset</a></li>
-        <li><a href="#terminals">Terminal symbols</a></li>
-        <li><a href="#nonterminals">Nonterminal symbols</a></li>
+	<li><a href="#grammar">Itemset</a></li>
+	<li><a href="#terminals">Terminal symbols</a></li>
+	<li><a href="#nonterminals">Nonterminal symbols</a></li>
       </ul>
     </li>
     <li><a href="#automaton">Automaton</a></li>
@@ -156,9 +154,9 @@
   <xsl:if test="nonterminal[@usefulness='useless-in-grammar']">
     <p class="pre">
       <xsl:for-each select="nonterminal[@usefulness='useless-in-grammar']">
-        <xsl:text>   </xsl:text>
-        <xsl:value-of select="@name"/>
-        <xsl:text>&#10;</xsl:text>
+	<xsl:text>   </xsl:text>
+	<xsl:value-of select="@name"/>
+	<xsl:text>&#10;</xsl:text>
       </xsl:for-each>
       <xsl:text>&#10;&#10;</xsl:text>
     </p>
@@ -175,9 +173,9 @@
     <p class="pre">
       <xsl:for-each select="terminal[@usefulness='unused-in-grammar']">
         <xsl:sort select="@symbol-number" data-type="number"/>
-        <xsl:text>   </xsl:text>
-        <xsl:value-of select="@name"/>
-        <xsl:text>&#10;</xsl:text>
+	<xsl:text>   </xsl:text>
+	<xsl:value-of select="@name"/>
+	<xsl:text>&#10;</xsl:text>
       </xsl:for-each>
       <xsl:text>&#10;&#10;</xsl:text>
     </p>
@@ -228,7 +226,6 @@
   <xsl:text>&#10;</xsl:text>
   <p class="pre">
     <xsl:call-template name="style-rule-set">
-      <xsl:with-param name="anchor" select="'true'" />
       <xsl:with-param
         name="rule-set" select="rules/rule[@usefulness!='useless-in-grammar']"
       />
@@ -240,11 +237,9 @@
 </xsl:template>
 
 <xsl:template name="style-rule-set">
-  <xsl:param name="anchor"/>
   <xsl:param name="rule-set"/>
   <xsl:for-each select="$rule-set">
     <xsl:apply-templates select=".">
-      <xsl:with-param name="anchor" select="$anchor"/>
       <xsl:with-param name="pad" select="'3'"/>
       <xsl:with-param name="prev-lhs">
         <xsl:if test="position()>1">
@@ -310,10 +305,9 @@
     <xsl:text> Terminals, with rules where they appear</xsl:text>
   </h3>
   <xsl:text>&#10;&#10;</xsl:text>
-  <ul>
-    <xsl:text>&#10;</xsl:text>
+  <p class="pre">
     <xsl:apply-templates select="terminal"/>
-  </ul>
+  </p>
   <xsl:text>&#10;&#10;</xsl:text>
 </xsl:template>
 
@@ -323,64 +317,41 @@
     <xsl:text> Nonterminals, with rules where they appear</xsl:text>
   </h3>
   <xsl:text>&#10;&#10;</xsl:text>
-  <ul>
-    <xsl:text>&#10;</xsl:text>
+  <p class="pre">
     <xsl:apply-templates
       select="nonterminal[@usefulness!='useless-in-grammar']"
     />
-  </ul>
+  </p>
 </xsl:template>
 
 <xsl:template match="terminal">
-  <xsl:text>  </xsl:text>
-  <li>
-    <b><xsl:value-of select="@name"/></b>
-    <xsl:if test="string-length(@type) != 0">
-      <xsl:value-of select="concat(' &lt;', @type, '&gt;')"/>
-    </xsl:if>
-    <xsl:value-of select="concat(' (', @token-number, ')')"/>
-    <xsl:for-each select="key('bison:ruleByRhs', @name)">
-      <xsl:apply-templates select="." mode="number-link"/>
-    </xsl:for-each>
-  </li>
+  <b><xsl:value-of select="@name"/></b>
+  <xsl:value-of select="concat(' (', @token-number, ')')"/>
+  <xsl:for-each select="key('bison:ruleByRhs', @name)">
+    <xsl:apply-templates select="." mode="number-link"/>
+  </xsl:for-each>
   <xsl:text>&#10;</xsl:text>
 </xsl:template>
 
 <xsl:template match="nonterminal">
-  <xsl:text>  </xsl:text>
-  <li>
-    <b><xsl:value-of select="@name"/></b>
-    <xsl:if test="string-length(@type) != 0">
-      <xsl:value-of select="concat(' &lt;', @type, '&gt;')"/>
+  <b><xsl:value-of select="@name"/></b>
+  <xsl:value-of select="concat(' (', @symbol-number, ')')"/>
+  <xsl:text>&#10;    </xsl:text>
+  <xsl:if test="key('bison:ruleByLhs', @name)">
+    <xsl:text>on left:</xsl:text>
+    <xsl:for-each select="key('bison:ruleByLhs', @name)">
+      <xsl:apply-templates select="." mode="number-link"/>
+    </xsl:for-each>
+  </xsl:if>
+  <xsl:if test="key('bison:ruleByRhs', @name)">
+    <xsl:if test="key('bison:ruleByLhs', @name)">
+      <xsl:text>&#10;    </xsl:text>
     </xsl:if>
-    <xsl:value-of select="concat(' (', @symbol-number, ')')"/>
-    <xsl:text>&#10;    </xsl:text>
-    <ul>
-      <xsl:text>&#10;</xsl:text>
-      <xsl:if test="key('bison:ruleByLhs', @name)">
-        <xsl:text>      </xsl:text>
-        <li>
-          <xsl:text>on left:</xsl:text>
-          <xsl:for-each select="key('bison:ruleByLhs', @name)">
-            <xsl:apply-templates select="." mode="number-link"/>
-          </xsl:for-each>
-        </li>
-        <xsl:text>&#10;</xsl:text>
-      </xsl:if>
-      <xsl:if test="key('bison:ruleByRhs', @name)">
-        <xsl:text>      </xsl:text>
-        <li>
-          <xsl:text>on right:</xsl:text>
-          <xsl:for-each select="key('bison:ruleByRhs', @name)">
-            <xsl:apply-templates select="." mode="number-link"/>
-          </xsl:for-each>
-        </li>
-        <xsl:text>&#10;</xsl:text>
-      </xsl:if>
-    <xsl:text>    </xsl:text>
-    </ul>
-    <xsl:text>&#10;  </xsl:text>
-  </li>
+    <xsl:text>on right:</xsl:text>
+    <xsl:for-each select="key('bison:ruleByRhs', @name)">
+      <xsl:apply-templates select="." mode="number-link"/>
+    </xsl:for-each>
+  </xsl:if>
   <xsl:text>&#10;</xsl:text>
 </xsl:template>
 
@@ -410,10 +381,10 @@
   <h3>
     <a>
       <xsl:attribute name="name">
-        <xsl:value-of select="concat('state_', @number)"/>
+	<xsl:value-of select="concat('state_', @number)"/>
       </xsl:attribute>
     </a>
-    <xsl:text>State </xsl:text>
+    <xsl:text>state </xsl:text>
     <xsl:value-of select="@number"/>
   </h3>
   <xsl:text>&#10;&#10;</xsl:text>
@@ -439,9 +410,9 @@
     <xsl:text>&#10;</xsl:text>
     <xsl:apply-templates select="transition[@type = $type]">
       <xsl:with-param name="pad">
-        <xsl:call-template name="max-width-symbol">
-          <xsl:with-param name="node" select="transition[@type = $type]"/>
-        </xsl:call-template>
+	<xsl:call-template name="max-width-symbol">
+	  <xsl:with-param name="node" select="transition[@type = $type]"/>
+	</xsl:call-template>
       </xsl:with-param>
     </xsl:apply-templates>
   </xsl:if>
@@ -452,9 +423,9 @@
     <xsl:text>&#10;</xsl:text>
     <xsl:apply-templates select="error">
       <xsl:with-param name="pad">
-        <xsl:call-template name="max-width-symbol">
-          <xsl:with-param name="node" select="error"/>
-        </xsl:call-template>
+	<xsl:call-template name="max-width-symbol">
+	  <xsl:with-param name="node" select="error"/>
+	</xsl:call-template>
       </xsl:with-param>
     </xsl:apply-templates>
   </xsl:if>
@@ -465,9 +436,9 @@
     <xsl:text>&#10;</xsl:text>
     <xsl:apply-templates select="reduction">
       <xsl:with-param name="pad">
-        <xsl:call-template name="max-width-symbol">
-          <xsl:with-param name="node" select="reduction"/>
-        </xsl:call-template>
+	<xsl:call-template name="max-width-symbol">
+	  <xsl:with-param name="node" select="reduction"/>
+	</xsl:call-template>
       </xsl:with-param>
     </xsl:apply-templates>
   </xsl:if>
@@ -476,7 +447,7 @@
 <xsl:template match="item">
   <xsl:param name="pad"/>
   <xsl:param name="prev-rule-number"
-             select="preceding-sibling::item[1]/@rule-number"/>
+	     select="preceding-sibling::item[1]/@rule-number"/>
   <xsl:apply-templates
     select="key('bison:ruleByNumber', current()/@rule-number)"
   >
@@ -485,68 +456,71 @@
     <xsl:with-param name="prev-lhs"
       select="key('bison:ruleByNumber', $prev-rule-number)/lhs[text()]"
    />
-    <xsl:with-param name="dot" select="@dot"/>
+    <xsl:with-param name="point" select="@point"/>
     <xsl:with-param name="lookaheads">
       <xsl:apply-templates select="lookaheads"/>
     </xsl:with-param>
   </xsl:apply-templates>
 </xsl:template>
 
-<!--
-anchor = 'true': define as an <a> anchor.
-itemset = 'true': show the items.
- -->
 <xsl:template match="rule">
-  <xsl:param name="anchor"/>
   <xsl:param name="itemset"/>
   <xsl:param name="pad"/>
   <xsl:param name="prev-lhs"/>
-  <xsl:param name="dot"/>
+  <xsl:param name="point"/>
   <xsl:param name="lookaheads"/>
 
   <xsl:if test="$itemset != 'true' and not($prev-lhs = lhs[text()])">
     <xsl:text>&#10;</xsl:text>
   </xsl:if>
 
+  <xsl:if test="$itemset != 'true'">
+    <a>
+      <xsl:attribute name="name">
+	<xsl:value-of select="concat('rule_', @number)"/>
+      </xsl:attribute>
+    </a>
+  </xsl:if>
   <xsl:text>  </xsl:text>
 
   <xsl:choose>
-    <xsl:when test="$anchor = 'true'">
+    <xsl:when test="$itemset = 'true'">
       <a>
-        <xsl:attribute name="name">
-          <xsl:value-of select="concat('rule_', @number)"/>
-        </xsl:attribute>
-        <xsl:call-template name="lpad">
-          <xsl:with-param name="str" select="string(@number)"/>
-          <xsl:with-param name="pad" select="number($pad)"/>
-        </xsl:call-template>
+	<xsl:attribute name="href">
+	  <xsl:value-of select="concat('#rule_', @number)"/>
+	</xsl:attribute>
+	<xsl:call-template name="lpad">
+	  <xsl:with-param name="str" select="string(@number)"/>
+	  <xsl:with-param name="pad" select="number($pad)"/>
+	</xsl:call-template>
       </a>
     </xsl:when>
     <xsl:otherwise>
-      <a>
-        <xsl:attribute name="href">
-          <xsl:value-of select="concat('#rule_', @number)"/>
-        </xsl:attribute>
-        <xsl:call-template name="lpad">
-          <xsl:with-param name="str" select="string(@number)"/>
-          <xsl:with-param name="pad" select="number($pad)"/>
-        </xsl:call-template>
-      </a>
+      <xsl:call-template name="lpad">
+	<xsl:with-param name="str" select="string(@number)"/>
+	<xsl:with-param name="pad" select="number($pad)"/>
+      </xsl:call-template>
     </xsl:otherwise>
   </xsl:choose>
   <xsl:text> </xsl:text>
 
   <!-- LHS -->
   <xsl:choose>
-    <xsl:when test="$prev-lhs = lhs[text()]">
+    <xsl:when test="$itemset != 'true' and $prev-lhs = lhs[text()]">
       <xsl:call-template name="lpad">
-        <xsl:with-param name="str" select="'|'"/>
-        <xsl:with-param name="pad" select="number(string-length(lhs[text()])) + 2"/>
+	<xsl:with-param name="str" select="'|'"/>
+	<xsl:with-param name="pad" select="number(string-length(lhs[text()])) + 2"/>
+      </xsl:call-template>
+    </xsl:when>
+    <xsl:when test="$itemset = 'true' and $prev-lhs = lhs[text()]">
+      <xsl:call-template name="lpad">
+	<xsl:with-param name="str" select="'|'"/>
+	<xsl:with-param name="pad" select="number(string-length(lhs[text()])) + 2"/>
       </xsl:call-template>
     </xsl:when>
     <xsl:otherwise>
       <span class="i">
-        <xsl:value-of select="lhs"/>
+	<xsl:value-of select="lhs"/>
       </span>
       <xsl:text> &#8594;</xsl:text>
     </xsl:otherwise>
@@ -554,14 +528,19 @@ itemset = 'true': show the items.
 
   <!-- RHS -->
   <xsl:for-each select="rhs/*">
-    <xsl:if test="position() = $dot + 1">
+    <xsl:if test="position() = $point + 1">
       <xsl:text> </xsl:text>
-      <span class="dot">&#x2022;</span>
+      <span class="point">.</span>
     </xsl:if>
-    <xsl:apply-templates select="."/>
-    <xsl:if test="position() = last() and position() = $dot">
+    <xsl:if test="$itemset = 'true' and name(.) != 'empty'">
+      <xsl:apply-templates select="."/>
+    </xsl:if>
+    <xsl:if test="$itemset != 'true'">
+      <xsl:apply-templates select="."/>
+    </xsl:if>
+    <xsl:if test="position() = last() and position() = $point">
       <xsl:text> </xsl:text>
-      <span class="dot">&#x2022;</span>
+      <span class="point">.</span>
     </xsl:if>
   </xsl:for-each>
   <xsl:if test="$lookaheads">
@@ -584,7 +563,7 @@ itemset = 'true': show the items.
 </xsl:template>
 
 <xsl:template match="empty">
-  <xsl:text> %empty</xsl:text>
+  <xsl:text> &#949;</xsl:text>
 </xsl:template>
 
 <xsl:template match="lookaheads">
@@ -610,18 +589,18 @@ itemset = 'true': show the items.
   <xsl:choose>
     <xsl:when test="@type = 'shift'">
       <a>
-        <xsl:attribute name="href">
-          <xsl:value-of select="concat('#state_', @state)"/>
-        </xsl:attribute>
-        <xsl:value-of select="concat('shift, and go to state ', @state)"/>
+	<xsl:attribute name="href">
+	  <xsl:value-of select="concat('#state_', @state)"/>
+	</xsl:attribute>
+	<xsl:value-of select="concat('shift, and go to state ', @state)"/>
       </a>
     </xsl:when>
     <xsl:when test="@type = 'goto'">
       <a>
-        <xsl:attribute name="href">
-          <xsl:value-of select="concat('#state_', @state)"/>
-        </xsl:attribute>
-        <xsl:value-of select="concat('go to state ', @state)"/>
+	<xsl:attribute name="href">
+	  <xsl:value-of select="concat('#state_', @state)"/>
+	</xsl:attribute>
+	<xsl:value-of select="concat('go to state ', @state)"/>
       </a>
     </xsl:when>
   </xsl:choose>
@@ -658,10 +637,10 @@ itemset = 'true': show the items.
     </xsl:when>
     <xsl:otherwise>
       <a>
-        <xsl:attribute name="href">
-          <xsl:value-of select="concat('#rule_', @rule)"/>
-        </xsl:attribute>
-        <xsl:value-of select="concat('reduce using rule ', @rule)"/>
+	<xsl:attribute name="href">
+	  <xsl:value-of select="concat('#rule_', @rule)"/>
+	</xsl:attribute>
+	<xsl:value-of select="concat('reduce using rule ', @rule)"/>
       </a>
       <xsl:text> (</xsl:text>
       <xsl:value-of
@@ -708,9 +687,9 @@ itemset = 'true': show the items.
   <xsl:variable name="longest">
     <xsl:for-each select="$node">
       <xsl:sort data-type="number" select="string-length(@symbol)"
-                order="descending"/>
+		order="descending"/>
       <xsl:if test="position() = 1">
-        <xsl:value-of select="string-length(@symbol)"/>
+	<xsl:value-of select="string-length(@symbol)"/>
       </xsl:if>
     </xsl:for-each>
   </xsl:variable>
@@ -727,7 +706,7 @@ itemset = 'true': show the items.
     </xsl:when>
     <xsl:otherwise>
       <xsl:call-template name="space">
-        <xsl:with-param name="repeat" select="$diff"/>
+	<xsl:with-param name="repeat" select="$diff"/>
       </xsl:call-template>
       <xsl:value-of select="$str"/>
     </xsl:otherwise>
@@ -745,7 +724,7 @@ itemset = 'true': show the items.
     <xsl:otherwise>
       <xsl:value-of select="$str"/>
       <xsl:call-template name="space">
-        <xsl:with-param name="repeat" select="$diff"/>
+	<xsl:with-param name="repeat" select="$diff"/>
       </xsl:call-template>
     </xsl:otherwise>
   </xsl:choose>

djgpp/Makefile.maint

@@ -0,0 +1,37 @@
+# DJGPP Maintainer's Makefile                                    -*-Makefile-*-
+# Requires GNU sed
+
+## Copyright (C) 2005-2010 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+top_srcdir = ..
+srcdir = .
+
+SHELL = /bin/sh
+
+all: README
+
+README: README.in $(top_srcdir)/configure
+	PACKAGE=`grep "^[	 ]*PACKAGE=" $(top_srcdir)/configure | sed -e 's/^[	 ]*PACKAGE=//' -e s/[\"\']//g`; \
+	VERSION=`grep "^[	 ]*VERSION=" $(top_srcdir)/configure | sed -e 's/^[	 ]*VERSION=//' -e s/[\"\']//g`; \
+	package_version=`echo "$${VERSION}" | sed 's/\.//g'`; \
+	tree_version=`echo "$${VERSION}" | sed 's/\.//2g'`; \
+	sed \
+	    -e "s/@V@/$${PACKAGE}-$${VERSION}/g" \
+	    -e "s/@VERSION@/$${VERSION}/g" \
+	    -e "s/@PACKAGE_VERSION@/$$package_version/g" \
+	    -e "s/@TREE_VERSION@/$$tree_version/g" \
+	  $(srcdir)/README.in > t-$@
+	mv t-$@ $@

djgpp/README.in

@@ -0,0 +1,195 @@
+This is a port of GNU Bison @VERSION@ to MSDOS/DJGPP.
+
+Copyright (C) 2005-2010 Free Software Foundation, Inc.
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+1.:     DJGPP specific changes.
+	=======================
+
+	The DJGPP port of Bison offers LFN and SFN support depending on which
+	OS it is running. If LFN support is available or not is determinated at
+	run time.  If LFN support is available (DOS session under Win9X, Win2K,
+	WinXP, etc.) the standard posix file name extensions will be used.
+	These are: y.tab.c, y.tab.c++, y.tab.h, y.output, etc.  If only SFN
+	support is available (plain DOS), then the standard MSDOS short file
+	names will be used. These are: y_tab.c, y_tab.h, y.out, etc.
+	It should be noticed that this bison version needs the m4 program as
+	back end to generate the parser file (y.tab.c etc.) from the skeleton
+	files.  This implies that m4 must always be installed to get bison
+	working.  m4 will use a couple of m4 scripts that will be installed in
+	/dev/env/DJDIR/share/bison and shall not be removed.
+	It should also be noticed that the skeleton files bison.simple and
+	bison.hairy are no longer supported.  This applies also to the environ-
+	ment variables BISON_HAIRY and BISON_SIMPLE.  Those variables are *no*
+	longer honored at all.
+	The kind of skeleton file bison.hairy is no longer supported at all.
+	The skeleton file bison.simple is now called yacc.c and is an m4 script.
+	The other two skeleton files supported by this bison version are glr.c
+	and lalr1.cc.  The first one is a generalized LR C parser based on
+	Bison's LALR(1) tables and the second one is a experimental C++ parser
+	class.
+	As has been told before, bison uses m4 to generate the parser file.
+	This is done by forking and using pipes for the IPC.  MSDOS does not
+	support this functionality so this has been reproduced in the usual
+	way by redirecting stdin and stdout of bison and m4 to temporary files
+	and processing these files in sequence.
+	It should be noticed that due to the great amount of file names that do
+	not cleanly map to 8.3 file names, you will need an OS with LFN support
+	to configure and compile the sources. On Win98 this implies that the
+	generation of numeric tails for 8.3 file name aliases must be enabled
+	or the compilation will fail.
+
+
+	Please **read** the docs.
+
+
+2.:     Installing the binary package.
+	==============================
+
+2.1.:   Copy the binary distribution into the top DJGPP installation directory,
+	just unzip it preserving the directory structure running *ONE* of the
+	following commands:
+	  unzip32 bsn@[email protected]      or
+	  djtarx bsn@[email protected]       or
+	  pkunzip -d bsn@[email protected]
+
+
+
+3.:     Building the binaries from sources.
+	===================================
+
+3.1.:   Create a temporary directory and copy the source package into the
+	directory.  If you download the source distribution from one of the
+	DJGPP sites, just unzip it preserving the directory structure
+	running *ONE* of the following commands:
+	  unzip32 bsn@[email protected]      or
+	  djtarx bsn@[email protected]       or
+	  pkunzip -d bsn@[email protected]
+	and proceed to the paragraph 3.3, below.
+
+3.2.:   Source distributions downloaded from one of the GNU FTP sites need
+	some more work to unpack, if LFN support is not available.  If LFN is
+	available then you can extract the source files from the archive with
+	any unzip program and proceed to the paragraph 3.3, below.  Any file
+	name issue will be handled by the the DJGPP configuration files.
+	To unpack the source distribution on SFN systems, first, you MUST use
+	the `djunpack' batch file to unzip the package.  That is because some
+	file names in the official distributions need to be changed to avoid
+	problems on the various platforms supported by DJGPP.
+	`djunpack' invokes the `djtar' program (that is part of the basic DJGPP
+	development kit) to rename these files on the fly given a file with
+	name mappings; the distribution includes a file `djgpp/fnchange.lst'
+	with the necessary mappings.  So you need first to retrieve that batch
+	file, and then invoke it to unpack the distribution.  Here's how:
+
+	  djtar -x -p -o bison-@VERSION@/djgpp/djunpack.bat bison-@[email protected] > djunpack.bat
+	  djunpack bison-@[email protected]
+
+	(The name of the distribution archive and the leading directory of the
+	path to `djunpack.bat' in the distribution will be different for
+	versions of Bison other than @VERSION@.)
+
+	If the argument to `djunpack.bat' include leading directories, it MUST
+	be given with the DOS-style backslashes; Unix-style forward slashes
+	will NOT work.
+
+	If the distribution comes as a .tar.bz2 archive, and your version of
+	`djtar' doesn't support bzip2 decompression, you need to unpack it as
+	follows:
+
+	  bnzip2 bison-@[email protected]
+	  djtar -x -p -o bison-@VERSION@/djgpp/djunpack.bat bison-@[email protected] > djunpack.bat
+	  djunpack bison-@[email protected]
+
+3.3.:   To build the binaries you will need the following binary packages:
+	  djdev203.zip (or a later but NOT a prior version)
+	  bsh204b.zip  (or a later but NOT a prior version)
+          gccNNNb.zip, gppNNN.zip, bnuNNNb.zip, makNNNb.zip, filNNNb.zip,
+          perlNNNb.zip, shlNNNb.zip, txtNNNb.zip, txiNNNb.zip, grepNNNb.zip,
+          sedNNNb.zip and m4NNN.zip
+
+	If you want to run the check you will need also:
+	  difNNNb.zip
+
+	NNN represents the latest version number of the binary packages. All
+	this packages can be found in the /v2gnu directory of any
+	ftp.delorie.com mirror.
+	You will need bsh204b.zip or later and *NOT* a prior version or
+	the build will fail.  The same applies to djdev203.zip.  Please note
+	that Bison requires m4-144b.zip or later to work properly.
+
+3.4.:   If for some reason you want to reconfigure the package cd into the top
+	srcdir (bison-@TREE_VERSION@) and run the following commands:
+	  del djgpp\config.cache
+	  make clean
+	  djgpp\config
+
+	Please note that you *MUST* delete the config.cache file in the djgpp
+	subdir or you will not really reconfigure the sources because the
+	configuration informations will be read from the cache file instead
+	of being newly computed.
+	To build the programs in a directory other than where the sources are,
+	you must add the parameter that specifies the source directory,
+	e.g:
+	  x:\src\gnu\bison-@TREE_VERSION@\djgpp\config x:/src/gnu/bison-@TREE_VERSION@
+
+	Lets assume you want to build the binaries in a directory placed on a
+	different drive (z:\build in this case) from where the sources are,
+	then you will run the following commands:
+	  z:
+	  md \build
+	  cd \build
+	  x:\src\gnu\bison-@TREE_VERSION@\djgpp\config x:/src/gnu/bison-@TREE_VERSION@
+
+	The order of the options and the srcdir option does not matter.  You
+	*MUST* use forward slashes to specify the source directory.
+
+	The batch file will set same environment variables, make MSDOS specific
+	modifications to the Makefile.in's and supply all other needed options
+	to the configure script.
+
+3.5.:   To compile the package run from the top srcdir the command:
+	  make
+
+3.6.:   Now you can run the tests if you like.  From the top srcdir run the
+	command:
+	  make check
+
+	No test should fail but the tests #131 (Doxygen Public Documentation)
+	and #132 (Doxygen Private Documentation) will be skipped.  Please note
+	that the testsuite only works with LFN available.  On plain DOS, most
+	of the tests will fail due to invalid DOS names.
+
+3.7.:   To install the binaries, header, library, catalogs, and info docs
+	run the following command from the top srcdir:
+	  make install
+
+	This will install the products into your DJGPP installation tree given
+	by the default prefix "/dev/env/DJDIR".  If you prefer to install them
+	into some other directory you will have to set prefix to the appropiate
+	value:
+	  make install prefix=z:/some/other/place
+
+
+
+	Send GNU bison specific bug reports to <[email protected]>.
+	Send suggestions and bug reports concerning the DJGPP port to
+	comp.os.msdos.djgpp or <[email protected]>.
+
+
+Enjoy.
+
+	Guerrero, Juan Manuel <[email protected]>

djgpp/config.bat

@@ -0,0 +1,547 @@
+@echo off
+Rem Configure Bison for DJGPP.
+
+Rem WARNING WARNING WARNING: This file needs to have DOS CRLF end-of-line
+Rem format, or else stock DOS/Windows shells will refuse to run it.
+
+Rem Copyright (C) 2005-2010 Free Software Foundation, Inc.
+
+Rem This program is free software: you can redistribute it and/or modify
+Rem it under the terms of the GNU General Public License as published by
+Rem the Free Software Foundation, either version 3 of the License, or
+Rem (at your option) any later version.
+Rem
+Rem This program is distributed in the hope that it will be useful,
+Rem but WITHOUT ANY WARRANTY; without even the implied warranty of
+Rem MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+Rem GNU General Public License for more details.
+Rem
+Rem You should have received a copy of the GNU General Public License
+Rem along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+echo Configuring Bison for DJGPP v2.x...
+
+Rem The SmallEnv tests protect against fixed and too small size
+Rem of the environment in stock DOS shell.
+
+Rem Find out if NLS is wanted or not,
+Rem if dependency-tracking is wanted or not,
+Rem if caching is wanted or not
+Rem and where the sources are.
+Rem We always default to NLS support,
+Rem no dependency tracking
+Rem and to in place configuration.
+set ARGS=
+set NLS=enabled
+if not "%NLS%" == "enabled" goto SmallEnv
+set CACHING=enabled
+if not "%CACHING%" == "enabled" goto SmallEnv
+set DEPENDENCY_TRACKING=disabled
+if not "%DEPENDENCY_TRACKING%" == "disabled" goto SmallEnv
+set LIBICONV_PREFIX=disabled
+if not "%LIBICONV_PREFIX%" == "disabled" goto SmallEnv
+set LIBINTL_PREFIX=disabled
+if not "%LIBINTL_PREFIX%" == "disabled" goto SmallEnv
+set HTML=enabled
+if not "%HTML%" == "enabled" goto SmallEnv
+set XSRC=.
+if not "%XSRC%" == "." goto SmallEnv
+
+Rem Loop over all arguments.
+Rem Special arguments are: NLS, XSRC, CACHE, STATIC_LIBS, LIBICONV_PREFIX, LIBINTL_PREFIX and DEPS.
+Rem All other arguments are stored into ARGS.
+:ArgLoop
+if "%1" == "nls" goto NextArgument
+if "%1" == "NLS" goto NextArgument
+if "%1" == "no-nls" goto NoNLS
+if "%1" == "no-NLS" goto NoNLS
+if "%1" == "NO-NLS" goto NoNLS
+goto CachingOption
+:NoNLS
+if "%1" == "no-nls" set NLS=disabled
+if "%1" == "no-NLS" set NLS=disabled
+if "%1" == "NO-NLS" set NLS=disabled
+if not "%NLS%" == "disabled" goto SmallEnv
+goto NextArgument
+:CachingOption
+if "%1" == "cache" goto NextArgument
+if "%1" == "CACHE" goto NextArgument
+if "%1" == "no-cache" goto NoCaching
+if "%1" == "no-CACHE" goto NoCaching
+if "%1" == "NO-CACHE" goto NoCaching
+goto DependencyOption
+:NoCaching
+if "%1" == "no-cache" set CACHING=disabled
+if "%1" == "no-CACHE" set CACHING=disabled
+if "%1" == "NO-CACHE" set CACHING=disabled
+if not "%CACHING%" == "disabled" goto SmallEnv
+goto NextArgument
+:DependencyOption
+if "%1" == "no-dep" goto NextArgument
+if "%1" == "no-DEP" goto NextArgument
+if "%1" == "NO-DEP" goto NextArgument
+if "%1" == "dep" goto DependecyTraking
+if "%1" == "DEP" goto DependecyTraking
+goto LibiconvPrefixOption
+:DependecyTraking
+if "%1" == "dep" set DEPENDENCY_TRACKING=enabled
+if "%1" == "DEP" set DEPENDENCY_TRACKING=enabled
+if not "%DEPENDENCY_TRACKING%" == "enabled" goto SmallEnv
+goto NextArgument
+:LibiconvPrefixOption
+if "%1" == "no-libiconvprefix" goto NextArgument
+if "%1" == "no-LIBICONVPREFIX" goto NextArgument
+if "%1" == "NO-LIBICONVPREFIX" goto NextArgument
+if "%1" == "libiconvprefix" goto WithLibiconvPrefix
+if "%1" == "LIBICONVPREFIX" goto WithLibiconvPrefix
+goto LibintlPrefixOption
+:WithLibiconvPrefix
+if "%1" == "libiconvprefix" set LIBICONV_PREFIX=enabled
+if "%1" == "LIBICONVPREFIX" set LIBICONV_PREFIX=enabled
+if not "%LIBICONV_PREFIX%" == "enabled" goto SmallEnv
+goto NextArgument
+:LibintlPrefixOption
+if "%1" == "no-libiconvprefix" goto NextArgument
+if "%1" == "no-LIBICONVPREFIX" goto NextArgument
+if "%1" == "NO-LIBICONVPREFIX" goto NextArgument
+if "%1" == "libintlprefix" goto _WithLibintlPrefix
+if "%1" == "LIBINTLPREFIX" goto _WithLibintlPrefix
+goto HTMLOption
+:_WithLibintlPrefix
+if "%1" == "libintlprefix" set LIBINTL_PREFIX=enabled
+if "%1" == "LIBINTLPREFIX" set LIBINTL_PREFIX=enabled
+if not "%LIBINTL_PREFIX%" == "enabled" goto SmallEnv
+:HTMLOption
+if "%1" == "withhtml" goto NextArgument
+if "%1" == "withHTML" goto NextArgument
+if "%1" == "WITHHTML" goto NextArgument
+if "%1" == "withouthtml" goto _WithoutHTML
+if "%1" == "withoutHTML" goto _WithoutHTML
+if "%1" == "WITHOUTHTML" goto _WithoutHTML
+goto SrcDirOption
+:_WithoutHTML
+if "%1" == "withouthtml" set HTML=disabled
+if "%1" == "withoutHTML" set HTML=disabled
+if "%1" == "WITHOUTHTML" set HTML=disabled
+if not "%HTML%" == "disabled" goto SmallEnv
+goto NextArgument
+:SrcDirOption
+echo %1 | grep -q "/"
+if errorlevel 1 goto CollectArgument
+set XSRC=%1
+if not "%XSRC%" == "%1" goto SmallEnv
+goto NextArgument
+:CollectArgument
+set _ARGS=%ARGS% %1
+if not "%_ARGS%" == "%ARGS% %1" if not "%_ARGS%" == "%ARGS%%1" goto SmallEnv
+echo %_ARGS% | grep -q "[^ ]"
+if not errorlevel 0 set ARGS=%_ARGS%
+set _ARGS=
+:NextArgument
+shift
+if not "%1" == "" goto ArgLoop
+
+Rem Create an arguments file for the configure script.
+echo --srcdir=%XSRC% > args
+if "%CACHING%" == "enabled"              echo --cache-file=%XSRC%/djgpp/config.cache >> args
+if "%DEPENDENCY_TRACKING%" == "enabled"  echo --enable-dependency-tracking >> args
+if "%DEPENDENCY_TRACKING%" == "disabled" echo --disable-dependency-tracking >> args
+if "%LIBICONV_PREFIX%" == "enabled"      echo --with-libiconv-prefix >> args
+if "%LIBICONV_PREFIX%" == "disabled"     echo --without-libiconv-prefix >> args
+if "%LIBINTL_PREFIX%" == "enabled"       echo --with-libintl-prefix >> args
+if "%LIBINTL_PREFIX%" == "disabled"      echo --without-libintl-prefix >> args
+if "%HTML%" == "enabled"                 echo --enable-html >> args
+if "%HTML%" == "disabled"                echo --disable-html >> args
+if not "%ARGS%" == ""                    echo %ARGS% >> args
+set ARGS=
+set CACHING=
+set DEPENDENCY_TRACKING=
+set LIBICONV_PREFIX=
+set LIBINTL_PREFIX=
+set HTML=
+
+if "%XSRC%" == "." goto InPlace
+
+:NotInPlace
+redir -e /dev/null update %XSRC%/configure.org ./configure
+test -f ./configure
+if errorlevel 1 update %XSRC%/configure ./configure
+
+:InPlace
+Rem Update configuration files
+echo Updating configuration scripts...
+test -f ./configure.org
+if errorlevel 1 update configure configure.org
+sed -f %XSRC%/djgpp/config.sed configure.org > configure
+if errorlevel 1 goto SedError
+
+Rem Make sure they have a config.site file
+set CONFIG_SITE=%XSRC%/djgpp/config.site
+if not "%CONFIG_SITE%" == "%XSRC%/djgpp/config.site" goto SmallEnv
+
+Rem inttypes_.h and inttypes.h map to the same 8.3 alias.
+test -f %XSRC%/lib/inttypes_.h
+if not errorlevel 1 mv -f %XSRC%/lib/inttypes_.h %XSRC%/lib/_inttypes.h
+
+Rem Make sure crucial file names are not munged by unpacking
+test -f %XSRC%/po/Makefile.in.in
+if not errorlevel 1 mv -f %XSRC%/po/Makefile.in.in %XSRC%/po/Makefile.in-in
+test -f %XSRC%/po/Makefile.in-in
+if errorlevel 1 mv -f %XSRC%/po/Makefile.in %XSRC%/po/Makefile.in-in
+test -f %XSRC%/po/Makefile.in-in
+if errorlevel 1 mv -f %XSRC%/po/Makefile.inin %XSRC%/po/Makefile.in-in
+test -f %XSRC%/po/Makefile.in-in
+if errorlevel 1 mv -f %XSRC%/po/Makefile.in_in %XSRC%/po/Makefile.in-in
+test -f %XSRC%/po/Makefile.in-in
+if errorlevel 1 mv -f %XSRC%/po/Makefile_in.in %XSRC%/po/Makefile.in-in
+test -f %XSRC%/runtime-po/Makefile.in.in
+if not errorlevel 1 mv -f %XSRC%/runtime-po/Makefile.in.in %XSRC%/runtime-po/Makefile.in-in
+test -f %XSRC%/runtime-po/Makefile.in-in
+if errorlevel 1 mv -f %XSRC%/runtime-po/Makefile.in %XSRC%/runtime-po/Makefile.in-in
+test -f %XSRC%/runtime-po/Makefile.in-in
+if errorlevel 1 mv -f %XSRC%/runtime-po/Makefile.inin %XSRC%/runtime-po/Makefile.in-in
+test -f %XSRC%/runtime-po/Makefile.in-in
+if errorlevel 1 mv -f %XSRC%/runtime-po/Makefile.in_in %XSRC%/runtime-po/Makefile.in-in
+test -f %XSRC%/runtime-po/Makefile.in-in
+if errorlevel 1 mv -f %XSRC%/runtime-po/Makefile_in.in %XSRC%/runtime-po/Makefile.in-in
+test -f %XSRC%/data/c++.m4
+if not errorlevel 1 mv -f %XSRC%/data/c++.m4 %XSRC%/data/cxx.m4
+test -f %XSRC%/data/cxx.m4
+if errorlevel 1 mv -f %XSRC%/data/cpp.m4 %XSRC%/data/cxx.m4
+test -f %XSRC%/data/c++-skel.m4
+if not errorlevel 1 mv -f %XSRC%/data/c++-skel.m4 %XSRC%/data/cxx-skel.m4
+test -f %XSRC%/data/cxx-skel.m4
+if errorlevel 1 mv -f %XSRC%/data/cpp-skel.m4 %XSRC%/data/cxx-skel.m4
+test -f %XSRC%/build-aux/javacomp.sh.in
+if not errorlevel 1 mv -f %XSRC%/build-aux/javacomp.sh.in %XSRC%/build-aux/javacomp.sh-in
+test -f %XSRC%/build-aux/javacomp.sh-in
+if errorlevel 1 mv -f %XSRC%/build-aux/javacomp.sh %XSRC%/build-aux/javacomp.sh-in
+test -f %XSRC%/build-aux/javacomp.sh-in
+if errorlevel 1 mv -f %XSRC%/build-aux/javacomp.shin %XSRC%/build-aux/javacomp.sh-in
+test -f %XSRC%/build-aux/javacomp.sh-in
+if errorlevel 1 mv -f %XSRC%/build-aux/javacomp.sh_in %XSRC%/build-aux/javacomp.sh-in
+test -f %XSRC%/build-aux/javacomp.sh-in
+if errorlevel 1 mv -f %XSRC%/build-aux/javacomp.sh.in %XSRC%/build-aux/javacomp.sh-in
+test -f %XSRC%/build-aux/javaexec.sh.in
+if not errorlevel 1 mv -f %XSRC%/build-aux/javaexec.sh.in %XSRC%/build-aux/javaexec.sh-in
+test -f %XSRC%/build-aux/javaexec.sh-in
+if errorlevel 1 mv -f %XSRC%/build-aux/javaexec.sh %XSRC%/build-aux/javaexec.sh-in
+test -f %XSRC%/build-aux/javaexec.sh-in
+if errorlevel 1 mv -f %XSRC%/build-aux/javaexec.shin %XSRC%/build-aux/javaexec.sh-in
+test -f %XSRC%/build-aux/javaexec.sh-in
+if errorlevel 1 mv -f %XSRC%/build-aux/javaexec.sh_in %XSRC%/build-aux/javaexec.sh-in
+test -f %XSRC%/build-aux/javaexec.sh-in
+if errorlevel 1 mv -f %XSRC%/build-aux/javaexec_sh.in %XSRC%/build-aux/javaexec.sh-in
+test -f %XSRC%/doc/yacc.1.in
+if not errorlevel 1 mv -f %XSRC%/doc/yacc.1.in %XSRC%/doc/yacc.1-in
+test -f %XSRC%/doc/yacc.1-in
+if errorlevel 1 mv -f %XSRC%/doc/yacc.1 %XSRC%/doc/yacc.1-in
+test -f %XSRC%/doc/yacc.1-in
+if errorlevel 1 mv -f %XSRC%/doc/yacc.1in %XSRC%/doc/yacc.1-in
+test -f %XSRC%/doc/yacc.1-in
+if errorlevel 1 mv -f %XSRC%/doc/yacc.1_in %XSRC%/doc/yacc.1-in
+test -f %XSRC%/doc/yacc.1-in
+if errorlevel 1 mv -f %XSRC%/doc/yacc_1.in %XSRC%/doc/yacc.1-in
+test -f %XSRC%/etc/bench.pl.in
+if not errorlevel 1 mv -f %XSRC%/etc/bench.pl.in %XSRC%/etc/bench.pl-in
+test -f %XSRC%/etc/bench.pl-in
+if errorlevel 1 mv -f %XSRC%/etc/bench.pl %XSRC%/etc/bench.pl-in
+test -f %XSRC%/etc/bench.pl-in
+if errorlevel 1 mv -f %XSRC%/etc/bench.plin %XSRC%/etc/bench.pl-in
+test -f %XSRC%/etc/bench.pl-in
+if errorlevel 1 mv -f %XSRC%/etc/bench.pl_in %XSRC%/etc/bench.pl-in
+test -f %XSRC%/etc/bench.pl-in
+if errorlevel 1 mv -f %XSRC%/etc/bench_pl.in %XSRC%/etc/bench.pl-in
+
+:scan_gram_c_Test
+test -f %XSRC%/src/c-scan-gram.c
+if not errorlevel 1 goto scan_skel_c_Test
+test -f %XSRC%/src/scan-gram-c.c
+if not errorlevel 1 mv -f %XSRC%/src/scan-gram-c.c %XSRC%/src/c-scan-gram.c
+:scan_skel_c_Test
+test -f %XSRC%/src/c-scan-skel.c
+if not errorlevel 1 goto FixFiles
+test -f %XSRC%/src/scan-skel-c.c
+if not errorlevel 1 mv -f %XSRC%/src/scan-skel-c.c %XSRC%/src/c-scan-skel.c
+
+:FixFiles
+Rem Fix data/lalr1.cc and data/location.cc to reflect the renaming of c++.m4
+sed "s/c++\.m4/cxx.m4/" %XSRC%/data/lalr1.cc > lalr1.cc
+if errorlevel 1 goto lalr1_ccFileError
+mv ./lalr1.cc %XSRC%/data/lalr1.cc
+sed "s/c++\.m4/cxx.m4/" %XSRC%/data/location.cc > location.cc
+if errorlevel 1 goto location_ccFileError
+mv ./location.cc %XSRC%/data/location.cc
+sed "s/c++\.m4/cxx.m4/" %XSRC%/data/glr.cc > glr.cc
+if errorlevel 1 goto glr_ccFileError
+mv ./glr.cc %XSRC%/data/glr.cc
+
+Rem Fix src/getargs.c to reflect the renaming of c++-skel.m4
+sed "s/c++-skel\.m4/cxx-skel.m4/" %XSRC%/src/getargs.c > getargs.c
+if errorlevel 1 goto getargs_cFileError
+mv ./getargs.c %XSRC%/src/getargs.c
+
+Rem Define DJGPP specific defs in config.hin
+echo Editing config.hin...
+test -f %XSRC%/lib/config_h.org
+if errorlevel 1 update %XSRC%/lib/config.hin %XSRC%/lib/config_h.org
+sed -f %XSRC%/djgpp/config_h.sed %XSRC%/lib/config_h.org > config.hin
+if errorlevel 1 goto SedError2
+mv -f config.hin %XSRC%/lib/config.hin
+
+
+Rem Fixing ilicit testsuite file name.
+test -f %XSRC%/tests/c++.at
+if not errorlevel 1 mv -f %XSRC%/tests/c++.at %XSRC%/tests/cxx.at
+
+test -f %XSRC%/tests/testsuite.org
+if errorlevel 1 update %XSRC%/tests/testsuite %XSRC%/tests/testsuite.org
+sed -f %XSRC%/djgpp/testsuite.sed %XSRC%/tests/testsuite.org > testsuite.tmp
+if errorlevel 1 goto SedError3
+mv -f ./testsuite.tmp %XSRC%/tests/testsuite
+
+Rem Fixing ilicit calc++ file names in the calc++ directory.
+test -d %XSRC%/examples/calc++
+if not errorlevel 1 mv -f %XSRC%/examples/calc++ %XSRC%/examples/calcxx
+test -d %XSRC%/examples/calcxx
+if errorlevel 1 mv -f %XSRC%/examples/calcpp %XSRC%/examples/calcxx
+test -f %XSRC%/examples/calcxx/calc++-scanner.cc
+if not errorlevel 1 mv -f %XSRC%/examples/calcxx/calc++-scanner.cc %XSRC%/examples/calcxx/calcxx-scanner.cc
+test -f %XSRC%/examples/calcxx/calcxx-scanner.cc
+if errorlevel 1 mv -f %XSRC%/examples/calcxx/calcpp-scanner.cc %XSRC%/examples/calcxx/calcxx-scanner.cc
+test -f %XSRC%/examples/calcxx/calc++-scanner.ll
+if not errorlevel 1 mv -f %XSRC%/examples/calcxx/calc++-scanner.ll %XSRC%/examples/calcxx/calcxx-scanner.ll
+test -f %XSRC%/examples/calcxx/calcxx-scanner.ll
+if errorlevel 1 mv -f %XSRC%/examples/calcxx/calcpp-scanner.ll %XSRC%/examples/calcxx/calcxx-scanner.ll
+test -f %XSRC%/examples/calcxx/calc++-driver.cc
+if not errorlevel 1 mv -f %XSRC%/examples/calcxx/calc++-driver.cc %XSRC%/examples/calcxx/calcxx-driver.cc
+test -f %XSRC%/examples/calcxx/calcxx-driver.cc
+if errorlevel 1 mv -f %XSRC%/examples/calcxx/calcpp-driver.cc %XSRC%/examples/calcxx/calcxx-driver.cc
+test -f %XSRC%/examples/calcxx/calc++-driver.hh
+if not errorlevel 1 mv -f %XSRC%/examples/calcxx/calc++-driver.hh %XSRC%/examples/calcxx/calcxx-driver.hh
+test -f %XSRC%/examples/calcxx/calcxx-driver.hh
+if errorlevel 1 mv -f %XSRC%/examples/calcxx/calcpp-driver.hh %XSRC%/examples/calcxx/calcxx-driver.hh
+test -f %XSRC%/examples/calcxx/calc++-parser.cc
+if not errorlevel 1 mv -f %XSRC%/examples/calcxx/calc++-parser.cc %XSRC%/examples/calcxx/calcxx-parser.cc
+test -f %XSRC%/examples/calcxx/calcxx-parser.cc
+if errorlevel 1 mv -f %XSRC%/examples/calcxx/calcpp-parser.cc %XSRC%/examples/calcxx/calcxx-parser.cc
+test -f %XSRC%/examples/calcxx/calc++-parser.hh
+if not errorlevel 1 mv -f %XSRC%/examples/calcxx/calc++-parser.hh %XSRC%/examples/calcxx/calcxx-parser.hh
+test -f %XSRC%/examples/calcxx/calcxx-parser.hh
+if errorlevel 1 mv -f %XSRC%/examples/calcxx/calcpp-parser.hh %XSRC%/examples/calcxx/calcxx-parser.hh
+test -f %XSRC%/examples/calcxx/calc++-parser.stamp
+if not errorlevel 1 mv -f %XSRC%/examples/calcxx/calc++-parser.stamp %XSRC%/examples/calcxx/calcxx-parser.stamp
+test -f %XSRC%/examples/calcxx/calcxx-parser.stamp
+if errorlevel 1 mv -f %XSRC%/examples/calcxx/calcpp-parser.stamp %XSRC%/examples/calcxx/calcxx-parser.stamp
+test -f %XSRC%/examples/calcxx/calc++-parser.yy
+if not errorlevel 1 mv -f %XSRC%/examples/calcxx/calc++-parser.yy %XSRC%/examples/calcxx/calcxx-parser.yy
+test -f %XSRC%/examples/calcxx/calcxx-parser.yy
+if errorlevel 1 mv -f %XSRC%/examples/calcxx/calcpp-parser.yy %XSRC%/examples/calcxx/calcxx-parser.yy
+test -f %XSRC%/examples/calcxx/calc++.cc
+if not errorlevel 1 mv -f %XSRC%/examples/calcxx/calc++.cc %XSRC%/examples/calcxx/calcxx.cc
+test -f %XSRC%/examples/calcxx/calcxx.cc
+if errorlevel 1 mv -f %XSRC%/examples/calcxx/calcpp.cc %XSRC%/examples/calcxx/calcxx.cc
+
+Rem Fixing #include lines in calcxx files.
+sed "/#[	 ]*include/s/++/xx/" %XSRC%/examples/calcxx/calcxx.cc > calcxx.cc
+if errorlevel 1 goto calcxxFileError
+mv ./calcxx.cc %XSRC%/examples/calcxx/calcxx.cc
+sed "/#[	 ]*include/s/++/xx/" %XSRC%/examples/calcxx/calcxx-driver.cc > calcxx-driver.cc
+if errorlevel 1 goto calcxxFileError
+mv ./calcxx-driver.cc %XSRC%/examples/calcxx/calcxx-driver.cc
+sed "/#[	 ]*include/s/++/xx/" %XSRC%/examples/calcxx/calcxx-driver.hh > calcxx-driver.hh
+if errorlevel 1 goto calcxxFileError
+mv ./calcxx-driver.hh %XSRC%/examples/calcxx/calcxx-driver.hh
+sed "/#[	 ]*include/s/++/xx/" %XSRC%/examples/calcxx/calcxx-parser.cc > calcxx-parser.cc
+if errorlevel 1 goto calcxxFileError
+mv ./calcxx-parser.cc %XSRC%/examples/calcxx/calcxx-parser.cc
+sed "/#[	 ]*include/s/++/xx/" %XSRC%/examples/calcxx/calcxx-parser.hh > calcxx-parser.hh
+if errorlevel 1 goto calcxxFileError
+mv ./calcxx-parser.hh %XSRC%/examples/calcxx/calcxx-parser.hh
+:sed "/#[	 ]*include/s/++/xx/" %XSRC%/examples/calcxx/calcxx-parser.yy > calcxx-parser.yy
+:if errorlevel 1 goto calcxxFileError
+:mv ./calcxx-parser.yy %XSRC%/examples/calcxx/calcxx-parser.yy
+sed "/#[	 ]*include/s/++/xx/" %XSRC%/examples/calcxx/calcxx-scanner.cc > calcxx-scanner.cc
+if errorlevel 1 goto calcxxFileError
+mv ./calcxx-scanner.cc %XSRC%/examples/calcxx/calcxx-scanner.cc
+:sed "/#[	 ]*include/s/++/xx/" %XSRC%/examples/calcxx/calcxx-scanner.ll > calcxx-scanner.ll
+:if errorlevel 1 goto calcxxFileError
+:mv ./calcxx-scanner.ll %XSRC%/examples/calcxx/calcxx-scanner.ll
+sed "s/calc++/calcxx/" %XSRC%/examples/calcxx/test > test
+if errorlevel 1 goto calcxxFileError
+mv ./test %XSRC%/examples/calcxx/test
+
+
+Rem Fixing the scanner files to make file names 8.3 valid.
+Rem Use only if you want to change the scan-gram.l and scan-skel.l files.
+: sed "/outfile=/s/\.yy/yy/" %XSRC%/src/scan-gram.l > scan-gram.l
+: if errorlevel 1 goto ScannerFileError
+: mv ./scan-gram.l %XSRC%/src/scan-gram.l
+: sed "/outfile=/s/\.yy/yy/" %XSRC%/src/scan-skel.l > scan-skel.l
+: if errorlevel 1 goto ScannerFileError
+: mv ./scan-skel.l %XSRC%/src/scan-skel.l
+
+
+Rem This is required because DOS/Windows are case-insensitive
+Rem to file names, and "make install" will do nothing if Make
+Rem finds a file called `install'.
+if exist INSTALL ren INSTALL INSTALL.txt
+
+Rem Set SHELL to a sane default or some configure tests stop working
+Rem if the package is configured across partitions.
+if not "%SHELL%" == "" goto HomeName
+set SHELL=/bin/sh
+if not "%SHELL%" == "/bin/sh" goto SmallEnv
+echo No SHELL found in the environment, using default value
+
+:HomeName
+Rem Set HOME to a sane default so configure stops complaining.
+if not "%HOME%" == "" goto HostName
+set HOME=%XSRC%/djgpp
+if not "%HOME%" == "%XSRC%/djgpp" goto SmallEnv
+echo No HOME found in the environment, using default value
+
+:HostName
+Rem Set HOSTNAME so it shows in config.status
+if not "%HOSTNAME%" == "" goto hostdone
+if "%windir%" == "" goto msdos
+set OS=MS-Windows
+if not "%OS%" == "MS-Windows" goto SmallEnv
+goto haveos
+:msdos
+set OS=MS-DOS
+if not "%OS%" == "MS-DOS" goto SmallEnv
+:haveos
+if not "%USERNAME%" == "" goto haveuname
+if not "%USER%" == "" goto haveuser
+echo No USERNAME and no USER found in the environment, using default values
+set HOSTNAME=Unknown PC
+if not "%HOSTNAME%" == "Unknown PC" goto SmallEnv
+goto userdone
+:haveuser
+set HOSTNAME=%USER%'s PC
+if not "%HOSTNAME%" == "%USER%'s PC" goto SmallEnv
+goto userdone
+:haveuname
+set HOSTNAME=%USERNAME%'s PC
+if not "%HOSTNAME%" == "%USERNAME%'s PC" goto SmallEnv
+:userdone
+set _HOSTNAME=%HOSTNAME%, %OS%
+if not "%_HOSTNAME%" == "%HOSTNAME%, %OS%" goto SmallEnv
+set HOSTNAME=%_HOSTNAME%
+:hostdone
+set _HOSTNAME=
+set OS=
+
+Rem install-sh is required by the configure script but clashes with the
+Rem various Makefile install-foo targets, so we MUST have it before the
+Rem script runs and rename it afterwards
+test -f %XSRC%/install-sh
+if not errorlevel 1 goto NoRen0
+test -f %XSRC%/install-sh.sh
+if not errorlevel 1 mv -f %XSRC%/install-sh.sh %XSRC%/install-sh
+:NoRen0
+
+if "%NLS%" == "disabled" goto WithoutNLS
+
+:WithNLS
+Rem Check for the needed libraries and binaries.
+test -x /dev/env/DJDIR/bin/msgfmt.exe
+if errorlevel 1 goto MissingNLSTools
+test -x /dev/env/DJDIR/bin/xgettext.exe
+if errorlevel 1 goto MissingNLSTools
+test -f /dev/env/DJDIR/include/libcharset.h
+if errorlevel 1 goto MissingNLSTools
+test -f /dev/env/DJDIR/lib/libcharset.a
+if errorlevel 1 goto MissingNLSTools
+test -f /dev/env/DJDIR/include/iconv.h
+if errorlevel 1 goto MissingNLSTools
+test -f /dev/env/DJDIR/lib/libiconv.a
+if errorlevel 1 goto MissingNLSTools
+test -f /dev/env/DJDIR/include/libintl.h
+if errorlevel 1 goto MissingNLSTools
+test -f /dev/env/DJDIR/lib/libintl.a
+if errorlevel 1 goto MissingNLSTools
+
+Rem Recreate the files in the %XSRC%/po subdir with our ported tools.
+redir -e /dev/null rm %XSRC%/po/*.gmo
+redir -e /dev/null rm %XSRC%/po/bison.pot
+redir -e /dev/null rm %XSRC%/po/cat-id-tbl.c
+redir -e /dev/null rm %XSRC%/po/stamp-cat-id
+
+Rem Update the arguments file for the configure script.
+Rem We prefer without-included-gettext because libintl.a from gettext package
+Rem is the only one that is garanteed to have been ported to DJGPP.
+echo --enable-nls --without-included-gettext >> args
+goto ConfigurePackage
+
+:MissingNLSTools
+echo Needed libs/tools for NLS not found. Configuring without NLS.
+:WithoutNLS
+Rem Update the arguments file for the configure script.
+echo --disable-nls >> args
+
+:ConfigurePackage
+echo Running the ./configure script...
+sh ./configure @args
+if errorlevel 1 goto CfgError
+rm args
+echo Done.
+goto End
+
+:lalr1_ccFileError
+echo ./data/lalr1.cc file editing failed!
+goto End
+
+:glr_ccFileError
+echo ./data/glr.cc file editing failed!
+goto End
+
+:getargs_cFileError
+echo ./src/getargs.c file editing failed!
+goto End
+
+:location_ccFileError
+echo ./data/location.cc file editing failed!
+goto End
+
+:calcxxFileError
+echo ./examples/calcxx file editing failed!
+goto End
+
+:ScannerFileError
+echo ./scanner file editing failed!
+goto End
+
+:SedError
+echo ./configure script editing failed!
+goto End
+
+:SedError2
+echo ./lib/config.hin editing failed!
+goto End
+
+:SedError3
+echo ./tests/testsuite editing failed!
+goto End
+
+:CfgError
+echo ./configure script exited abnormally!
+goto End
+
+:SmallEnv
+echo Your environment size is too small.  Enlarge it and run me again.
+echo Configuration NOT done!
+
+:End
+test -f %XSRC%/install-sh.sh
+if not errorlevel 1 goto NoRen1
+test -f %XSRC%/install-sh
+if not errorlevel 1 mv -f %XSRC%/install-sh %XSRC%/install-sh.sh
+:NoRen1
+if "%SHELL%" == "/bin/sh" set SHELL=
+if "%HOME%" == "%XSRC%/djgpp" set HOME=
+set CONFIG_SITE=
+set HOSTNAME=
+set NLS=
+set XSRC=

djgpp/config.sed

@@ -0,0 +1,191 @@
+# DJGPP specific configuration file.
+# Sed script for additional DJGPP specific editing
+# of the configure script generated by autoconf 2.62.
+
+
+# Copyright (C) 2005-2010 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+# Additional editing of Makefiles
+/^eval sed.*ac_file_inputs.*tmp\/out \\$/ {
+:loop
+n
+/^$/!b loop
+a\
+cat > "$tmp/subs-djgpp.sed" << eof_djgpp\
+# DJGPP specific Makefile changes.\
+s,\\.deps,_deps,g\
+s,\\.libs,_libs,g\
+s,\\.new\\.,_new.,g\
+s,\\.old\\.,_old.,g\
+s,\\.tab\\.,_tab.,g\
+s,c++\\.at,cxx.at,g\
+s,c++\\.m4,cxx.m4,g\
+s,c++-skel\\.m4,cxx-skel.m4,g\
+s,calc++,calcxx,g\
+s,scan-gram-c,c-scan-gram,g\
+s,scan-skel-c,c-scan-skel,g\
+s,inttypes_,_inttypes,g\
+s,javacomp\\.sh\\.in,javacomp.sh-in,g\
+s,javaexec\\.sh\\.in,javaexec.sh-in,g\
+s,yacc\\.1\\.in,yacc.1-in,g\
+s,bench\\.pl\\.in,bench.pl-in,g\
+s,Makefile\\.am\\.in,Makefile.am-in,g\
+s,Makefile\\.in\\.in,Makefile.in-in,g\
+/^\\.y\\.c:/,/^$/ {\
+  /\\\$(YACCCOMPILE)/ {\
+    a\\\\\\
+	-@test -f y.tab.c && mv -f y.tab.c y_tab.c\\\\\
+	-@test -f y.tab.h && mv -f y.tab.h y_tab.h\
+  }\
+}\
+/^libbison.a:/ i\\\\\\
+\\\$(top_srcdir)/djgpp/subpipe.c: \\$(top_srcdir)/djgpp/subpipe.h\\\\\
+subpipe.o: \\$(top_srcdir)/djgpp/subpipe.c \\$(top_srcdir)/djgpp/subpipe.h\\\\\
+	\\\$(COMPILE) -c \\$<\
+/^yacc:/ i\\\\\\
+yacc.bat:\\\\\
+	echo "bison\\$(EXEEXT) -y %1 %2 %3 %4 %5 %6 %7 %8 %9" >\\$@\
+/^bin_SCRIPTS =/s/$/ yacc.bat/\
+/^MOSTLYCLEANFILES = yacc/s/$/ yacc.bat/\
+/cross-options.texi:/,/^$/ s|bison|&.exe|g\
+/^\\.x\\.1:/,/^$/ s|\\$program|&.exe|g\
+eof_djgpp\
+sed -f "\$tmp/subs-djgpp.sed" \$tmp/out > \$tmp/out.djgpp\
+mv -f \$tmp/out.djgpp \$tmp/out
+}
+
+# Makefile.in.in is renamed to Makefile.in-in.
+/ac_config_files=/ {
+  /runtime-po/!s|po/Makefile\.in|&:po/Makefile.in-in|
+  s|runtime-po/Makefile\.in|&:runtime-po/Makefile.in-in|
+  s|javacomp\.sh\.in|javacomp.sh-in|
+  s|javaexec\.sh\.in|javaexec.sh-in|
+  s|doc/yacc\.1|&:doc/yacc.1-in|
+  s|etc/bench.pl|&:etc/bench.pl-in|
+}
+
+/CONFIG_FILES=/ {
+  /runtime-po/!s|po/Makefile\.in|&:po/Makefile.in-in|2
+  s|runtime-po/Makefile\.in|&:runtime-po/Makefile.in-in|2
+  s|javacomp\.sh\.in|javacomp.sh-in|
+  s|javaexec\.sh\.in|javaexec.sh-in|
+  s|doc/yacc\.1|&:doc/yacc.1-in|2
+  s|etc/bench\.pl|&:etc/bench.pl-in|2
+}
+
+# We always use _deps and _libs instead of .deps and .libs, because
+# the latter is an invalid name on 8+3 MS-DOS file system.  This makes
+# the generated Makefiles good for every DJGPP installation, not only
+# the one where the package was configured (which could happen to be
+# a Windows box, where leading dots in file names are allowed).
+/^rmdir[	 ]*\.tst/ i\
+am__leading_dot=_
+
+# Replace (command) > /dev/null with `command > /dev/null`, since
+# parenthesized commands always return zero status in the ported Bash,
+# even if the named command doesn't exist
+/if ([^|;`]*null/{
+  s,(,`,
+  s,),,
+  /null[	 ]*2>&1/ s,2>&1,&`,
+  /null.*null/ s,null.*null,&`,
+  /null.*null/ !{
+    /null[	 ]*2>&1/ !s,null,&`,
+  }
+}
+
+# DOS-style absolute file names should be supported as well
+/\*) top_srcdir=/s,/\*,[\\\\/]* | ?:[\\\\/]*,
+
+# The following two items are changes needed for configuring
+# and compiling across partitions.
+# 1) The given srcdir value is always translated from the
+#    "x:" syntax into "/dev/x" syntax while we run configure.
+/^[	 ]*-srcdir=\*.*$/ a\
+    ac_optarg=`echo "$ac_optarg" | sed "s,^\\([A-Za-z]\\):,/dev/\\1,"`
+/set X `ls -Lt \$srcdir/ i\
+   if `echo $srcdir | grep "^/dev/" - > /dev/null`; then\
+     srcdir=`echo "$srcdir" | sed -e "s%^/dev/%%" -e "s%/%:/%"`\
+   fi
+
+# Autoconf 2.52e generated configure scripts
+# write absolute paths into Makefiles and bison.in
+# making them useless for DJGPP installations for
+# which the package has not been configured for.
+/MISSING=/,/^$/ {
+  /^fi$/ a\
+am_missing_run=`echo "$am_missing_run" | sed 's%/dev/.*/bison[-_0-9]\\{1,1\\}[-.0-9A-Za-z+]*%${top_srcdir}%;s%.:.*/bison[-_0-9]\\{1,1\\}[-.0-9A-Za-z+]*%${top_srcdir}%'`
+}
+/^install_sh=/a\
+install_sh=`echo "$install_sh" | sed 's%/dev/.*/bison[-_0-9]\\{1,1\\}[-.0-9A-Za-z+]*%${top_srcdir}%;s%.:.*/bison[-_0-9]\\{1,1\\}[-.0-9A-Za-z+]*%${top_srcdir}%'`
+
+# This will only work if the assumption that the
+# testsuite is ran from the following path:
+#   ${top_srcdir}/tests/testsuite.dir
+# holds. The explicit names are of no importance.
+#   ../../. == ${top_srcdir}
+#/^esac$/,/^ac_abs_srcdir=/ {
+/^ac_abs_srcdir=/ i\
+ac_abs_builddir=`echo "$ac_abs_builddir" | sed "s%/dev/.*/bison[-_0-9]\\{1,1\\}[-.0-9A-Za-z+]*%../../.%;s%.:.*/bison[-_0-9]\\{1,1\\}[-.0-9A-Za-z+]*%../../.%"`\
+ac_abs_top_builddir=`echo "$ac_abs_top_builddir" | sed "s%/dev/.*/bison[-_0-9]\\{1,1\\}[-.0-9A-Za-z+]*%../../..%;s%.:.*/bison[-_0-9]\\{1,1\\}[-.0-9A-Za-z+]*%../../..%"`\
+ac_abs_top_srcdir=`echo "$ac_abs_top_srcdir" | sed "s%/dev/.*/bison[-_0-9]\\{1,1\\}[-.0-9A-Za-z+]*%../../..%;s%.:.*/bison[-_0-9]\\{1,1\\}[-.0-9A-Za-z+]*%../../..%"`
+#ac_abs_srcdir=`echo "$ac_abs_srcdir" | sed "s%/dev/.*/bison[-_0-9]\\{1,1\\}[-.0-9A-Za-z+]*%../../.%;s%.:.*/bison[-_0-9]\\{1,1\\}[-.0-9A-Za-z+]*%../../.%"`
+/^ac_abs_srcdir=/ a\
+for dj_dir in $ac_abs_builddir $ac_abs_top_builddir $ac_abs_top_srcdir $ac_abs_srcdir\
+do\
+  ac_abs_builddir=`echo "$ac_abs_builddir" | sed "s%//%/%g"`\
+  ac_abs_top_builddir=`echo "$ac_abs_top_builddir" | sed "s%//%/%g"`\
+  ac_abs_top_srcdir=`echo "$ac_abs_top_srcdir" | sed "s%//%/%g"`\
+  ac_abs_srcdir=`echo "$ac_abs_srcdir" | sed "s%//%/%g"`\
+done
+
+# Add DJGPP version information.
+/^#define VERSION/ s/\$VERSION/&  (DJGPP port (r1))/
+
+# We need makeinfo to make the html formated docs.
+/\$am_missing_run[	 ]*makeinfo/ s,\$am_missing_run,,
+
+# The path to the FORTRAN compiler and libraries
+# shall contain no absolute path reference so it
+# will be good for all djgpp installations.
+/^FLIBS="\$ac_cv_flibs"/ i\
+ac_djgpp_path=`echo "$DJDIR" | sed 's%\\\\\\%/%g' | tr $as_cr_LETTERS $as_cr_letters`\
+ac_cv_flibs=`echo "$ac_cv_flibs" | sed "s%-L$ac_djgpp_path%-L/dev/env/DJDIR%g"`
+
+# Autoconf generated configure scripts write absolute
+# paths of certain header files into Makefiles making
+# them useless for DJGPP installations for which the
+# package has not been configured for.
+/^.*echo "\$as_me:\$LINENO: result: \$gl_cv_absolute_.*$/ {
+h
+s,^.*\(gl_cv_absolute_\)\([a-z0-9_]*\)\(_h\).*$,\1\2\3=`echo $\1\2\3 | sed "s%[^:]:.*/include/%/dev/env/DJDIR/include/%"`,
+G
+}
+/^.*echo "\$as_me:\$LINENO: result: \$gl_cv_full_.*$/ {
+h
+s,^.*\(gl_cv_full_\)\([a-z0-9_]*\)\(_h\).*$,\1\2\3=`echo $\1\2\3 | sed "s%[^:]:.*/include/%/dev/env/DJDIR/include/%"`,
+G
+}
+
+# The following is not a valid DOS file name
+s/calc++/calcxx/g
+
+# The CR test for awk does not work for DJGPP.
+/^ac_cs_awk_cr=/,/^$/ {
+  /^fi$/ a\
+ac_cs_awk_cr=$ac_cr
+}

djgpp/config.site

@@ -0,0 +1,85 @@
+#! /bin/sh
+
+# This is the config.site file for configuring GNU packages
+# which are to be built with DJGPP tools.
+
+# Copyright (C) 2005-2010 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+# Include the djgpp subdirectory in PATH, so that getconf is found
+PATH="$srcdir/djgpp:$PATH"
+
+# These two variables are required, otherwise looking for
+# programs along the PATH will not work.
+PATH_SEPARATOR=:
+PATH_EXPAND=y
+
+# This is required in for "test -f foo" to find foo.exe
+export TEST_FINDS_EXE=y
+
+# The root of the DJGPP tree serves as the default prefix
+test "x$prefix" = xNONE && prefix='/dev/env/DJDIR'
+
+# This is required for config.status script to be run, since
+# ./configure runs it by invoking ${CONFIG_SHELL-/bin/sh}
+CONFIG_SHELL=${CONFIG_SHELL='sh'}
+
+# These are set here so the generated Makefile's will be good
+# for every DJGPP installation, not only the one where the
+# package was configured.
+# $INSTALL must be an absolute path name, otherwise config.status
+# will try to prepend ./ and ../ to it when it goes into subdirs.
+INSTALL=${INSTALL='/dev/env/DJDIR/bin/ginstall -c'}
+RANLIB=${RANLIB='ranlib'}
+GMSGFMT=${GMSGFMT='/dev/env/DJDIR/bin/msgfmt'}
+MSGFMT=${MSGFMT='/dev/env/DJDIR/bin/msgfmt'}
+XGETTEXT=${XGETTEXT='/dev/env/DJDIR/bin/xgettext'}
+AWK=${AWK='gawk'}
+
+# A sane default for emacs.
+ac_cv_path_EMACS=${EMACS='/dev/env/DJDIR/gnu/emacs/bin/emacs'}
+
+# A sane default for m4.
+ac_cv_path_M4=${M4='/dev/env/DJDIR/bin/m4'}
+
+# A sane default for grep.
+ac_cv_path_GREP=${GREP='/dev/env/DJDIR/bin/grep'}
+
+# A sane default for egrep.
+ac_cv_path_EGREP=${EGREP='/dev/env/DJDIR/bin/egrep'}
+
+# A sane default for fgrep.
+ac_cv_path_FGREP=${FGREP='/dev/env/DJDIR/bin/fgrep'}
+
+# A sane default for sed.
+ac_cv_path_SED=${SED='/dev/env/DJDIR/bin/sed'}
+
+# A sane default for mkdir.
+ac_cv_path_mkdir=${MKDIR_P='/dev/env/DJDIR/bin/mkdir -p'}
+
+# These are set here so the generated libtool will be good
+# for every DJGPP installation, not only the one where the
+# package was configured.
+NM=${NM='nm'}
+LD=${LD='ld'}
+
+# Force the test for 'ln -s' to report 'cp -pf'.
+ac_cv_prog_LN_S='cp -pf'
+
+# There is no fork and vfork functionality.
+ac_cv_func_fork=no
+ac_cv_func_vfork=no
+ac_cv_func_pipe=no

djgpp/config_h.sed

@@ -1,7 +1,7 @@
-#! /bin/sh
+# sed script for DJGPP specific editing of config.hin
+
+# Copyright (C) 2005-2010 Free Software Foundation, Inc.
 
-# Copyright (C) 2020-2022, 2025-2026 Free Software Foundation, Inc.
-#
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
@@ -13,30 +13,16 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-cat >input <<EOF
-1+2*3
-EOF
-run 0 7
 
-cat >input <<EOF
-1 - 2 - 3
-EOF
-run 0 -4
-
-cat >input <<EOF
-8 / 2 / 2
-EOF
-run 0 2
-
-cat >input <<EOF
-(1+2) * 3
-EOF
-run 0 9
-run -noerr 0 9 -p
-
-cat >input <<EOF
-1++2
-EOF
-run 0 "err: syntax error, unexpected '+', expecting number or '('"
+$ a\
+\
+\
+/* DJGPP specific defines.  */\
+\
+#include <unistd.h>\
+#define TAB_EXT     ((pathconf(NULL, _PC_NAME_MAX) > 12) ? ".tab" : "_tab")\
+#define OUTPUT_EXT  ((pathconf(NULL, _PC_NAME_MAX) > 12) ? ".output" : ".out")\
+\
+#define DEFAULT_TMPDIR  "/dev/env/DJDIR/tmp"

djgpp/djunpack.bat

@@ -0,0 +1,87 @@
+@echo off
+Rem
+Rem WARNING WARNING WARNING: This file needs to have DOS CRLF end-of-line
+Rem format, or else stock DOS/Windows shells will refuse to run it.
+Rem
+Rem This batch file unpacks the Bison distribution while simultaneously
+Rem renaming some of the files whose names are invalid on DOS or conflict
+Rem with other file names after truncation to DOS 8+3 namespace.
+Rem
+Rem Copyright (C) 2005-2010 Free Software Foundation, Inc.
+Rem
+Rem This program is free software: you can redistribute it and/or modify
+Rem it under the terms of the GNU General Public License as published by
+Rem the Free Software Foundation, either version 3 of the License, or
+Rem (at your option) any later version.
+Rem
+Rem This program is distributed in the hope that it will be useful,
+Rem but WITHOUT ANY WARRANTY; without even the implied warranty of
+Rem MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+Rem GNU General Public License for more details.
+Rem
+Rem You should have received a copy of the GNU General Public License
+Rem along with this program.  If not, see <http://www.gnu.org/licenses/>.
+Rem
+Rem
+Rem Invoke like this:
+Rem
+Rem     djunpack bison-XYZ.tar.gz
+Rem or
+Rem     djunpack bison-XYZ.tar.bz2
+Rem
+Rem where XYZ is the version number.  If the argument includes leading
+Rem directories, it MUST use backslashes, not forward slashes.
+Rem
+
+set ENVIRONMENT_SIZE_TEST_STRING=ENVIRONMENT_SIZE_TEST_STRING
+if "%ENVIRONMENT_SIZE_TEST_STRING%"=="ENVIRONMENT_SIZE_TEST_STRING" GoTo EnvOk
+Rem If their environment space is too small, re-exec with a larger one
+command.com /e:4096 /c %0 %1
+GoTo End
+
+:EnvOk
+set ENVIRONMENT_SIZE_TEST_STRING=
+if "%1" == "" GoTo NoArgument
+if not exist %1 GoTo NoArchive
+Rem Extract top src dir from archive file.
+djtar -t %1 > top_src.dir
+Rem The following uses a feature of COPY whereby it does not copy
+Rem empty files.  We need that because the previous line will create
+Rem an empty fnchange.tmp even if the command failed for some reason.
+copy top_src.dir junk.tmp > nul
+if not exist junk.tmp GoTo NoDjTar
+del junk.tmp
+sed "1{s/^.*bison-/djtar -x -p -o bison-/;s|$|djgpp/fnchange.lst %%1 > fnchange.tmp|};2,$d" top_src.dir > ext_list.bat
+Rem See the comment above about the reason for using COPY.
+copy ext_list.bat junk.tmp > nul
+if not exist junk.tmp GoTo NoSed
+del junk.tmp
+Rem Extract fnchange.lst from archive.
+call ext_list.bat %1
+del ext_list.bat
+sed "1{s|^.*bison-|s/@V@/bison-|;s|$|g|};2,$d" top_src.dir > version.sed
+sed -f version.sed < fnchange.tmp > fnchange.lst
+del version.sed
+del fnchange.tmp
+del top_src.dir
+Rem unpack the source distribution
+djtar -x -n fnchange.lst %1
+del fnchange.lst
+GoTo End
+
+:NoSed
+del junk.tmp
+echo FAIL: Sed is not available.
+GoTo End
+:NoDjTar
+del junk.tmp
+echo FAIL: DJTAR is not available or no fnchange.lst file in %1.
+GoTo End
+:NoArchive
+echo FAIL: the file %1 does not seem to exist.
+echo Remember that %1 cannot use forward slashes, only backslashes.
+GoTo End
+:NoArgument
+echo FAIL: no archive file has been specified.
+echo Remember that the file name cannot use forward slashes, only backslashes.
+:End

djgpp/fnchange.lst

@@ -0,0 +1,27 @@
+@V@/build-aux/javacomp.sh.in              @V@/build-aux/javacomp.sh-in
+@V@/build-aux/javaexec.sh.in              @V@/build-aux/javaexec.sh-in
+@V@/data/c++-skel.m4                      @V@/data/cxx-skel.m4
+@V@/data/c++.m4                           @V@/data/cxx.m4
+@V@/doc/yacc.1.in                         @V@/doc/yacc.1-in
+@V@/etc/bench.pl.in                       @V@/etc/bench.pl-in
+@V@/examples/calc++/                      @V@/examples/calcxx/
+@V@/examples/calc++/Makefile.am           @V@/examples/calcxx/Makefile.am
+@V@/examples/calc++/Makefile.in           @V@/examples/calcxx/Makefile.in
+@V@/examples/calc++/calc++-scanner.cc     @V@/examples/calcxx/calcxx-scanner.cc
+@V@/examples/calc++/calc++-scanner.ll     @V@/examples/calcxx/calcxx-scanner.ll
+@V@/examples/calc++/calc++.cc             @V@/examples/calcxx/calcxx.cc
+@V@/examples/calc++/calc++-driver.hh      @V@/examples/calcxx/calcxx-driver.hh
+@V@/examples/calc++/calc++-driver.cc      @V@/examples/calcxx/calcxx-driver.cc
+@V@/examples/calc++/stack.hh              @V@/examples/calcxx/stack.hh
+@V@/examples/calc++/position.hh           @V@/examples/calcxx/position.hh
+@V@/examples/calc++/location.hh           @V@/examples/calcxx/location.hh
+@V@/examples/calc++/calc++-parser.hh      @V@/examples/calcxx/calcxx-parser.hh
+@V@/examples/calc++/calc++-parser.cc      @V@/examples/calcxx/calcxx-parser.cc
+@V@/examples/calc++/calc++-parser.stamp   @V@/examples/calcxx/calcxx-parser.stamp
+@V@/examples/calc++/calc++-parser.yy      @V@/examples/calcxx/calcxx-parser.yy
+@V@/examples/calc++/test                  @V@/examples/calcxx/test
+@V@/po/Makefile.in.in                     @V@/po/Makefile.in-in
+@V@/runtime-po/Makefile.in.in             @V@/runtime-po/Makefile.in-in
+@V@/src/scan-gram-c.c                     @V@/src/c-scan-gram.c
+@V@/src/scan-skel-c.c                     @V@/src/c-scan-skel.c
+@V@/tests/c++.at                          @V@/tests/cxx.at

djgpp/subpipe.c

@@ -0,0 +1,293 @@
+/* Subprocesses with pipes.
+
+   Copyright (C) 2005-2010 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Juan Manuel Guerrero <[email protected]>. */
+
+
+#include <config.h>
+
+#include "subpipe.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <process.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "xalloc.h"
+
+
+#ifndef STDIN_FILENO
+# define STDIN_FILENO 0
+#endif
+#ifndef STDOUT_FILENO
+# define STDOUT_FILENO 1
+#endif
+
+
+#include "error.h"
+
+#include "gettext.h"
+#define _(Msgid)  gettext (Msgid)
+
+
+/* Initialize this module. */
+
+
+static int old_stdin;
+static int old_stdout;
+static char **arguments;
+static char tmp_file_name[2][L_tmpnam];
+
+#define remove_tmp_file(fd, name)                                     \
+  do {                                                                \
+    close ((fd));                                                     \
+    if (unlink ((name)))                                              \
+      error (EXIT_FAILURE, 0, _("removing of `%s' failed"), (name));  \
+  } while (0)
+
+
+void
+init_subpipe(void)
+{
+  char *tmpdir;
+  int fd;
+
+  tmpdir = getenv("TMPDIR");
+  if (tmpdir == NULL)
+    tmpdir = getenv("TMP");
+  if (tmpdir == NULL)
+    tmpdir = getenv("TEMP");
+  if (access(tmpdir, D_OK))
+    tmpdir = ".";
+
+  strcpy(tmp_file_name[0], tmpdir);
+  strcat(tmp_file_name[0], "/bnXXXXXX");
+  fd = mkstemp(tmp_file_name[0]);
+  if (fd < 0)
+    error(EXIT_FAILURE, 0, _("creation of a temporary file failed"));
+  close (fd);
+
+  strcpy(tmp_file_name[1], tmpdir);
+  strcat(tmp_file_name[1], "/bnXXXXXX");
+  fd = mkstemp(tmp_file_name[1]);
+  if (fd < 0)
+    error(EXIT_FAILURE, 0, _("creation of a temporary file failed"));
+  close (fd);
+}
+
+
+/* Create a subprocess that is run as a filter.  ARGV is the
+   NULL-terminated argument vector for the subprocess.  Store read and
+   write file descriptors for communication with the subprocess into
+   FD[0] and FD[1]: input meant for the process can be written into
+   FD[0], and output from the process can be read from FD[1].  Return
+   the subprocess id.
+
+   Because DOS has neither fork nor pipe functionality to run the subprocess
+   as a filter, the filter is reproduced using temporary files. First bison's
+   stdout is redirected to a temporary file. After bison has produced all of
+   is output, this file is closed and connected to m4's stdin. All m4's output
+   is redirected from m4's stdout to a second temporary file and reopened as
+   bison's stdin. */
+
+pid_t
+create_subpipe(char const *const *argv, int fd[2])
+{
+  int argc;
+  int from_in_fd;  /* pipe from bison to m4. */
+  pid_t pid;
+
+
+  pid = getpid();
+
+  /*
+   *  Save original stdin and stdout
+   *  for later restauration.
+   */
+  old_stdin = dup(STDIN_FILENO);
+  if (old_stdin < 0)
+    error(EXIT_FAILURE, 0, _("saving stdin failed"));
+
+  old_stdout = dup(STDOUT_FILENO);
+  if (old_stdout < 0)
+    error(EXIT_FAILURE, 0, _("saving stdout failed"));
+
+  /*
+   *  Save argv for later use.
+   */
+  for (argc = 0; argv[argc]; argc++)
+    ;
+  argc++;
+  arguments = xmalloc(argc * sizeof(arguments[0]));
+  for (argc = 0; argv[argc]; argc++)
+  {
+    arguments[argc] = xmalloc((strlen(argv[argc]) + 1) * sizeof(arguments[0][0]));
+    strcpy(arguments[argc], argv[argc]);
+  }
+  arguments[argc] = NULL;
+
+  /*
+   *  All bison's output will be gathered in this temporary file
+   *  and will be redirected to m4's stdin.
+   */
+  from_in_fd = open(tmp_file_name[0], O_WRONLY | O_CREAT | O_TRUNC, S_IWUSR);
+  if (from_in_fd < 0)
+    error(EXIT_FAILURE, 0, _("opening of tmpfile failed"));
+  if (dup2(from_in_fd, STDOUT_FILENO) < 0)
+  {
+    remove_tmp_file(from_in_fd, tmp_file_name[0]);
+    error(EXIT_FAILURE, 0, _("redirecting bison's stdout to the temporary file failed"));
+  }
+  close(from_in_fd);
+
+
+  fd[0] = STDOUT_FILENO;
+  return pid;
+}
+
+
+/* A signal handler that just records that a signal has happened. */
+static int child_interrupted;
+
+static void
+signal_catcher(int signo)
+{
+  child_interrupted++;
+}
+
+
+void
+end_of_output_subpipe(pid_t pid, int fd[2])
+{
+  char *program;
+  int from_out_fd = open(tmp_file_name[0], O_RDONLY, S_IRUSR);                   /* pipe from bison to m4. */
+  int to_in_fd = open(tmp_file_name[1], O_WRONLY | O_CREAT | O_TRUNC, S_IWUSR);  /* pipe from m4 to bison. */
+  int status;
+  void (*previous_handler)(int);
+
+
+  program = strrchr(arguments[0], '/');
+  if (program)
+    program++;
+  else
+    program = arguments[0];
+
+  /*
+   *  Redirect bison's output to m4's stdin.
+   */
+  if (from_out_fd < 0)
+    error(EXIT_FAILURE, 0, _("opening of tmpfile failed"));
+  if (dup2(from_out_fd, STDIN_FILENO) < 0)
+  {
+    remove_tmp_file(from_out_fd, tmp_file_name[0]);
+    error(EXIT_FAILURE, 0, _("redirecting m4's stdin from the temporary file failed"));
+  }
+  close(from_out_fd);
+
+  /*
+   *  All m4's output will be gathered in this temporary file
+   *  and will be redirected to bison's stdin.
+   */
+  if (to_in_fd < 0)
+  {
+    remove_tmp_file(STDIN_FILENO, tmp_file_name[0]);
+    error(EXIT_FAILURE, 0, _("opening of a temporary file failed"));
+  }
+  if (dup2(to_in_fd, STDOUT_FILENO) < 0)
+  {
+    remove_tmp_file(STDIN_FILENO, tmp_file_name[0]);
+    remove_tmp_file(to_in_fd, tmp_file_name[1]);
+    error(EXIT_FAILURE, 0, _("redirecting m4's stdout to a temporary file failed"));
+  }
+  close(to_in_fd);
+
+  /*
+   *  Run m4.
+   */
+  child_interrupted = 0;
+  errno = 0;
+  previous_handler = signal(SIGINT, signal_catcher);
+  status = spawnvp(P_WAIT, program, arguments);
+  signal(SIGINT, previous_handler);
+  if (child_interrupted)
+  {
+    remove_tmp_file(STDIN_FILENO, tmp_file_name[0]);
+    remove_tmp_file(STDOUT_FILENO, tmp_file_name[1]);
+    error(EXIT_FAILURE, 0, _("subsidiary program `%s' interrupted"), program);
+  }
+  if (status)
+  {
+    remove_tmp_file(STDIN_FILENO, tmp_file_name[0]);
+    remove_tmp_file(STDOUT_FILENO, tmp_file_name[1]);
+    error(EXIT_FAILURE, 0, _(errno == ENOENT
+			     ? "subsidiary program `%s' not found"
+			     : status < 1
+			     ? "subsidiary program `%s' failed"
+			     : "subsidiary program `%s' failed (status=%i, errno=%i)"), program, status, errno);
+  }
+
+
+  /*
+   *  Redirect m4's output to bison's stdin.
+   */
+  if (dup2(old_stdout, STDOUT_FILENO) < 0)
+    error(EXIT_FAILURE, 0, "restore of bison's stdout failed");
+  close(old_stdout);
+  to_in_fd = open(tmp_file_name[1], O_RDONLY, S_IRUSR);  /* pipe from m4 to bison. */
+  if (to_in_fd < 0)
+  {
+    remove_tmp_file(STDIN_FILENO, tmp_file_name[0]);
+    error(EXIT_FAILURE, 0, _("opening of tmpfile failed"));
+  }
+  if (dup2(to_in_fd, STDIN_FILENO) < 0)
+  {
+    remove_tmp_file(STDIN_FILENO, tmp_file_name[0]);
+    remove_tmp_file(to_in_fd, tmp_file_name[1]);
+    error(EXIT_FAILURE, -1, "dup2");
+    error(EXIT_FAILURE, 0, _("redirecting bison's stdin from the temporary file failed"));
+  }
+  close(to_in_fd);
+
+
+  fd[1] = STDIN_FILENO;
+}
+
+
+/* Free resources, unlink temporary files and restore stdin and stdout. */
+
+void
+reap_subpipe(pid_t pid, char const *program)
+{
+  int argc;
+
+  for (argc = 0; arguments[argc]; argc++)
+    free(arguments[argc]);
+  free(arguments);
+
+  if (unlink(tmp_file_name[0]))
+    error(EXIT_FAILURE, 0, _("removing of `%s' failed"), tmp_file_name[0]);
+  if (unlink(tmp_file_name[1]))
+    error(EXIT_FAILURE, 0, _("removing of `%s' failed"), tmp_file_name[1]);
+
+  if (dup2(old_stdin, STDIN_FILENO) < 0)
+    error(EXIT_FAILURE, 0, "restore of bison's stdin failed");
+  close(old_stdin);
+}

djgpp/subpipe.h

@@ -0,0 +1,26 @@
+/* Subprocesses with pipes.
+   Copyright (C) 2005-2010 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Juan Manuel Guerrero <[email protected]>. */
+
+#if HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+void init_subpipe(void);
+pid_t create_subpipe(char const * const *, int[2]);
+void end_of_output_subpipe(pid_t, int[2]);
+void reap_subpipe(pid_t, char const *);

djgpp/testsuite.sed

@@ -1,36 +1,24 @@
-#! /bin/sh
-
-# Copyright (C) 2018-2022, 2025-2026 Free Software Foundation, Inc.
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-cat >input <<EOF
-1 + 2 * 3
-EOF
-run 0 7
-
-cat >input <<EOF
-+1 + +2 * +3
-EOF
-run 0 7
-
-cat >input <<EOF
--1 + -2 * -3
-EOF
-run 0 5
-
-cat >input <<EOF
-1 + 2 * * 3
-EOF
-run 1 "err: syntax error, unexpected *, expecting + or - or ( or number"
+# DJGPP specific configuration file.
+# Sed script for additional DJGPP specific editing
+# of the testsuite script generated by autoconf 2.61.
+
+
+# Copyright (C) 2007-2010 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+# Remove disallowed characters from file names.
+
+s/~!@#\\\$%^&\*()-=_+{}\[\]|\\\\:;<>, ./~!@#\\$%^\&()-=_+{}[];, ./g