version 3.5.3

* NEWS: Record release date.
news: update for 3.5.3
2026-08-08 10:15:14 +00:00 · 2020-03-08 08:30:41 +01:00 · 2020-03-08 08:17:13 +01:00 · 2020-03-08 08:10:11 +01:00 · 2020-03-08 08:10:11 +01:00 · 2020-03-08 08:10:11 +01:00
215 changed files with 1238 additions and 758 deletions
@@ -1 +1 @@
-3.4.92
+3.5.2
@@ -1,14 +1,8 @@
-# Travis defines and exports CC and CXX *after* we have defined our
-# environment variables via 'env'.  So, do not use 'env' to define them.
-# Instead, put their definitions in MATRIX_EVAL, which we eval after the
-# definitions from Travis.
-language: cpp
+version: ~> 1.0

-env:
-  global:
-    # ICC serial number.
-    # See https://github.com/nemequ/icc-travis.
-    secure: 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
+# 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
@@ -87,7 +81,9 @@ jobs:
            - sourceline: 'ppa:ubuntu-toolchain-r/test'
          packages: g++-9
      env:
-        - MATRIX_EVAL="CC=gcc-9 && CXX=g++-9 && CONFIGUREFLAGS='CPPFLAGS=-DNDEBUG CFLAGS=-O3 CXXFLAGS=-O3'"
+        - CC=gcc-9
+        - CXX=g++-9
+        - 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.
@@ -108,7 +104,8 @@ jobs:
            - libc++abi-9-dev
      env:
        # Do not use ASAN with ubuntu's libc++: https://bugs.llvm.org/show_bug.cgi?id=17379
-        - MATRIX_EVAL="CC='clang-9 -fsanitize=address' CXX='clang++-9 -fsanitize=address -stdlib=libc++'"
+        - CC='clang-9 -fsanitize=address'
+        - CXX='clang++-9 -fsanitize=address -stdlib=libc++'
        - PART=1

    - name: "Clang 9 libc++ and ASAN part 2"
@@ -118,26 +115,26 @@ jobs:
      addons: *clang9
      env:
        # Do not use ASAN with ubuntu's libc++: https://bugs.llvm.org/show_bug.cgi?id=17379
-        - MATRIX_EVAL="CC='clang-9 -fsanitize=address' CXX='clang++-9 -fsanitize=address -stdlib=libc++'"
+        - CC='clang-9 -fsanitize=address'
+        - CXX='clang++-9 -fsanitize=address -stdlib=libc++'
        - PART=2

-    # Currently no longer works (https://github.com/nemequ/icc-travis/issues/15).
-    # - name: "ICC"
-    #   stage: check
-    #   # We need the build-aux/install-icc.sh script.
-    #   git:
-    #     clone: true
-    #     submodules: false
-    #     depth: 1
-    #   os: linux
-    #   dist: xenial
-    #   env:
-    #     # ICC's warnings are often very wrong (e.g., it thinks foo ?
-    #     # "bar" : "baz" is char* instead of const char*), so don't try
-    #     # to work around the, and obviously, don't die on them.
-    #     - MATRIX_EVAL="CC=icc && CXX=icpc"
-    #     - MAKE_ARGS='WERROR_CFLAGS= WERROR_CXXFLAGS='
-
+    - name: "ICC"
+      stage: check
+      os: linux
+      compiler: icc
+      env:
+        - CC=icc
+        - CXX=icpc
+      install:
+        - source /opt/intel/inteloneapi/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

    ## ----- ##
    ## GCC.  ##
@@ -150,7 +147,8 @@ jobs:
        apt:
          packages: g++-8
      env:
-        - MATRIX_EVAL="CC='gcc-8 -fsanitize=undefined,address -fno-omit-frame-pointer' CXX='g++-8 -fsanitize=undefined,address -fno-omit-frame-pointer'"
+        - CC='gcc-8 -fsanitize=undefined,address -fno-omit-frame-pointer'
+        - CXX='g++-8 -fsanitize=undefined,address -fno-omit-frame-pointer'
        - CONFIGUREFLAGS='CFLAGS=-O1 CXXFLAGS=-O1'
        - PART=1

@@ -162,7 +160,8 @@ jobs:
        apt:
          packages: g++-8
      env:
-        - MATRIX_EVAL="CC=gcc-8 && CXX=g++-8"
+        - CC=gcc-8
+        - CXX=g++-8

    - name: "GCC 7"
      stage: check
@@ -172,7 +171,8 @@ jobs:
        apt:
          packages: g++-7
      env:
-        - MATRIX_EVAL="CC=gcc-7 && CXX=g++-7"
+        - CC=gcc-7
+        - CXX=g++-7

    - name: "GCC 6"
      stage: check
@@ -183,7 +183,8 @@ jobs:
          sources: ubuntu-toolchain-r-test
          packages: g++-6
      env:
-        - MATRIX_EVAL="CC=gcc-6 && CXX=g++-6"
+        - CC=gcc-6
+        - CXX=g++-6

    - name: "GCC 5"
      stage: check
@@ -194,7 +195,8 @@ jobs:
          sources: ubuntu-toolchain-r-test
          packages: g++-5
      env:
-         - MATRIX_EVAL="CC=gcc-5 && CXX=g++-5"
+         - CC=gcc-5
+         - CXX=g++-5

    - name: "GCC 4.9"
      stage: check
@@ -205,7 +207,8 @@ jobs:
          sources: ubuntu-toolchain-r-test
          packages: g++-4.9
      env:
-         - MATRIX_EVAL="CC=gcc-4.9 && CXX=g++-4.9"
+         - CC=gcc-4.9
+         - CXX=g++-4.9

    - name: "GCC 4.8"
      stage: check
@@ -216,7 +219,8 @@ jobs:
          sources: ubuntu-toolchain-r-test
          packages: g++-4.8
      env:
-         - MATRIX_EVAL="CC=gcc-4.8 && CXX=g++-4.8"
+         - CC=gcc-4.8
+         - CXX=g++-4.8

    - name: "GCC 4.7"
      stage: check
@@ -227,7 +231,8 @@ jobs:
          sources: ubuntu-toolchain-r-test
          packages: g++-4.7
      env:
-         - MATRIX_EVAL="CC=gcc-4.7 && CXX=g++-4.7"
+         - CC=gcc-4.7
+         - CXX=g++-4.7

    - name: "GCC 4.6"
      stage: check
@@ -238,7 +243,8 @@ jobs:
          sources: ubuntu-toolchain-r-test
          packages: g++-4.6
      env:
-         - MATRIX_EVAL="CC=gcc-4.6 && CXX=g++-4.6"
+         - CC=gcc-4.6
+         - CXX=g++-4.6

    ## ------- ##
    ## Clang.  ##
@@ -255,7 +261,8 @@ jobs:
            - libc++-8-dev
            - libc++abi-8-dev
      env:
-        - MATRIX_EVAL="CC=clang-8 && CXX='clang++-8 -stdlib=libc++'"
+        - CC=clang-8
+        - CXX='clang++-8 -stdlib=libc++'
        - CONFIGUREFLAGS='CPPFLAGS=-DNDEBUG CFLAGS=-O3 CXXFLAGS=-O3'

    - name: "Clang 7"
@@ -269,7 +276,8 @@ jobs:
            - libc++-7-dev
            - libc++abi-7-dev
      env:
-        - MATRIX_EVAL="CC=clang-7 && CXX='clang++-7 -stdlib=libc++'"
+        - CC=clang-7
+        - CXX='clang++-7 -stdlib=libc++'

    - name: "Clang 6 and libc++"
      stage: check
@@ -284,7 +292,8 @@ jobs:
            - clang-6.0
            - libc++-dev
      env:
-        - MATRIX_EVAL="CC=clang-6.0 && CXX='clang++-6.0 -stdlib=libc++'"
+        - CC=clang-6.0
+        - CXX='clang++-6.0 -stdlib=libc++'

    - name: "Clang 5"
      stage: check
@@ -297,7 +306,8 @@ jobs:
            - clang-5.0
            - libc++-dev
      env:
-        - MATRIX_EVAL="CC='clang-5.0' CXX='clang++-5.0'"
+        - CC='clang-5.0'
+        - CXX='clang++-5.0'

    - name: "Clang 4"
      stage: check
@@ -308,7 +318,8 @@ jobs:
          sources: llvm-toolchain-xenial-4.0
          packages: clang-4.0
      env:
-        - MATRIX_EVAL="CC=clang-4.0 && CXX=clang++-4.0"
+        - CC=clang-4.0
+        - CXX=clang++-4.0

    - name: "Clang 3.9"
      stage: check
@@ -319,7 +330,8 @@ jobs:
          sources: llvm-toolchain-xenial-3.9
          packages: clang-3.9
      env:
-        - MATRIX_EVAL="CC=clang-3.9 && CXX=clang++-3.9"
+        - CC=clang-3.9
+        - CXX=clang++-3.9

    - name: "Clang 3.8"
      stage: check
@@ -332,7 +344,8 @@ jobs:
            - llvm-toolchain-precise-3.8
          packages: clang-3.8
      env:
-        - MATRIX_EVAL="CC=clang-3.8 && CXX=clang++-3.8"
+        - CC=clang-3.8
+        - CXX=clang++-3.8

    - name: "CLang 3.7"
      stage: check
@@ -345,7 +358,8 @@ jobs:
            - llvm-toolchain-precise-3.7
          packages: clang-3.7
      env:
-        - MATRIX_EVAL="CC=clang-3.7 && CXX=clang++-3.7"
+        - CC=clang-3.7
+        - CXX=clang++-3.7

    - name: "Clang 3.6"
      stage: check
@@ -358,7 +372,8 @@ jobs:
            - llvm-toolchain-precise-3.6
          packages: clang-3.6
      env:
-        - MATRIX_EVAL="CC=clang-3.6 && CXX=clang++-3.6"
+        - CC=clang-3.6
+        - CXX=clang++-3.6

    - name: "Clang 3.5"
      stage: check
@@ -371,7 +386,8 @@ jobs:
            - llvm-toolchain-precise-3.5
          packages: clang-3.5
      env:
-        - MATRIX_EVAL="CC=clang-3.5 && CXX=clang++-3.5"
+        - CC=clang-3.5
+        - CXX=clang++-3.5

    - name: "Clang 3.4"
      stage: check
@@ -384,7 +400,8 @@ jobs:
      env:
        # No versioned name installed, but beware that Travis installs
        # a more modern clang earlier in the default PATH.
-        - MATRIX_EVAL='CC=/usr/bin/clang && CXX=/usr/bin/clang++'
+        - CC=/usr/bin/clang
+        - CXX=/usr/bin/clang++

    - name: "Clang 3.3"
      stage: check
@@ -396,7 +413,8 @@ jobs:
          packages: clang-3.3
      env:
        # See comment for 3.4.
-        - MATRIX_EVAL='CC=/usr/bin/clang && CXX=/usr/bin/clang++'
+        - 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).
@@ -414,13 +432,9 @@ before_script:

 # 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:
-  - eval "$MATRIX_EVAL"
  # Beware not too leak $SSH_PRIVATE_KEY.
  # - env
  - sudo apt-get install -qq doxygen flex m4
-  # Install and activate ICC.
-  - if [[ $CC == "icc" ]]; then build-aux/install-icc.sh; fi
-  - if [[ -f ~/.bashrc ]]; then source ~/.bashrc; fi
  # Install and activate dmd.
  - mkdir -p ~/dlang && wget https://dlang.org/install.sh -O ~/dlang/install.sh
  - source $(source ~/dlang/install.sh dmd -a)
@@ -452,6 +466,3 @@ script:
  - 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
-
-after_script:
-  - uninstall_intel_software || true
@@ -24,7 +24,7 @@ and nasty bugs.

 -----

-Copyright (C) 1998-2015, 2018-2019 Free Software Foundation, Inc.
+Copyright (C) 1998-2015, 2018-2020 Free Software Foundation, Inc.

 This file is part of Bison, the GNU Compiler Compiler.

@@ -26733,7 +26733,7 @@

 	-----

-	Copyright (C) 1987-1988, 1991-2015, 2018-2019 Free Software
+	Copyright (C) 1987-1988, 1991-2015, 2018-2020 Free Software
 	Foundation, Inc.

 	Copying and distribution of this file, with or without
@@ -1,6 +1,6 @@
 ## Process this file with automake to produce Makefile.in.

-# Copyright (C) 2001-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2001-2015, 2018-2020 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
@@ -1,5 +1,32 @@
 GNU Bison NEWS

+* Noteworthy changes in release 3.5.3 (2020-03-08) [stable]
+
+** Bug fixes
+
+  Error messages could quote lines containing zero-width characters (such as
+  \005) with incorrect styling.  Fixes for similar issues with unexpectedly
+  short lines (e.g., the file was changed between parsing and diagnosing).
+
+  Several unlikely crashes found by fuzzing have been fixed.
+
+* Noteworthy changes in release 3.5.2 (2020-02-13) [stable]
+
+** Bug fixes
+
+  Portability issues and minor cosmetic issues.
+
+  The lalr1.cc skeleton properly rejects unsupported values for parse.lac
+  (as yacc.c does).
+
+* Noteworthy changes in release 3.5.1 (2020-01-19) [stable]
+
+** Bug fixes
+
+  Portability fixes.
+
+  Fix compiler warnings.
+
 * Noteworthy changes in release 3.5 (2019-12-11) [stable]

 ** Backward incompatible changes
@@ -3811,7 +3838,7 @@ Output file does not redefine const for C++.

 -----

-Copyright (C) 1995-2015, 2018-2019 Free Software Foundation, Inc.
+Copyright (C) 1995-2015, 2018-2020 Free Software Foundation, Inc.

 This file is part of Bison, the GNU Parser Generator.

@@ -36,7 +36,7 @@ to the bison package.

 -----

-Copyright (C) 2002, 2005, 2009-2015, 2018-2019 Free Software Foundation,
+Copyright (C) 2002, 2005, 2009-2015, 2018-2020 Free Software Foundation,
 Inc.

 This file is part of Bison, the GNU Compiler Compiler.
@@ -17,13 +17,18 @@ 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.

+## 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`.
+
 ## Colored diagnostics
 As an experimental feature, diagnostics are now colored, controlled by the
 `--color` and `--style` options.

 To use them, install the libtextstyle library before configuring Bison.  It
 is available from https://alpha.gnu.org/gnu/gettext/, for instance
-https://alpha.gnu.org/gnu/gettext/libtextstyle-0.8.tar.gz.
+https://alpha.gnu.org/pub/gnu/gettext/libtextstyle-0.20.5.tar.gz.

 The option --color supports the following arguments:
 - always, yes: Enable colors.
@@ -80,23 +85,17 @@ that the range specifies every single year in that closed interval.

 <!--

-Copyright (C) 1992, 1998-1999, 2003-2005, 2008-2015, 2018-2019 Free
+Copyright (C) 1992, 1998-1999, 2003-2005, 2008-2015, 2018-2020 Free
 Software Foundation, Inc.

 This file is part of GNU 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/>.
+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.

 Local Variables:
 mode: markdown
@@ -12,7 +12,7 @@ the problems you encounter.

 -----

-Copyright (C) 2002, 2004, 2009-2015, 2018-2019 Free Software Foundation,
+Copyright (C) 2002, 2004, 2009-2015, 2018-2020 Free Software Foundation,
 Inc.

 This file is part of GNU Bison.
@@ -34,13 +34,28 @@ Only user visible strings are to be translated: error messages, bits of the
 assert/abort), and all the --trace output which is meant for the maintainers
 only.

-## Horizontal tabs
+## Coding style
+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 adhoc implementations of lists).
+
 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.

+## Commit messages
+Please, imitate the style we use.  Use `git log` to get sources of
+inspiration.
+
+## 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`.

 # Working from the repository

@@ -507,7 +522,7 @@ Push these changes.

 <!--

-Copyright (C) 2002-2005, 2007-2015, 2018-2019 Free Software Foundation,
+Copyright (C) 2002-2005, 2007-2015, 2018-2020 Free Software Foundation,
 Inc.

 This file is part of GNU Bison.
@@ -4,8 +4,9 @@ it is today without the invaluable help of these people:
 Aaro Koskinen             [email protected]
 Аскар Сафин               [email protected]
 Adam Sampson              [email protected]
+Ahcheong Lee              [email protected]
 Airy Andre                [email protected]
-Akim Demaille             akim@lrde.epita.fr
+Akim Demaille             akim@gnu.org
 Albert Chin-A-Young       [email protected]
 Alexander Belopolsky      [email protected]
 Alexandre Duret-Lutz      [email protected]
@@ -60,6 +61,7 @@ Enrico Scholz             [email protected]
 Eric Blake                [email protected]
 Eric S. Raymond           [email protected]
 Étienne Renault           [email protected]
+Evan Nemerson             [email protected]
 Evgeny Stambulchik        [email protected]
 Fabrice Bauzac            [email protected]
 Ferdinand Thiessen        [email protected]
@@ -79,6 +81,7 @@ Hans Åberg                [email protected]
 Horst Von Brand           [email protected]
 Jan Nieuwenhuizen         [email protected]
 Jannick                   [email protected]
+Jeff Hammond              [email protected]
 Jerry Quinn               [email protected]
 Jesse Thilo               [email protected]
 Jim Kent                  [email protected]
@@ -128,6 +131,7 @@ Nick Bowler               [email protected]
 Nicolas Bedon             [email protected]
 Nicolas Burrus            [email protected]
 Nicolas Tisserand         [email protected]
+Nikki Valen               [email protected]
 Noah Friedman             [email protected]
 Odd Arild Olsen           [email protected]
 Oleg Smolsky              [email protected]
@@ -219,7 +223,7 @@ End:

 -----

-Copyright (C) 2000-2015, 2018-2019 Free Software Foundation, Inc.
+Copyright (C) 2000-2015, 2018-2020 Free Software Foundation, Inc.

 This file is part of Bison, the GNU Parser Generator.

@@ -315,13 +315,8 @@ It would be a very nice source of inspiration for the other languages.
 Valentin Tolmer is working on this.

 ** YYERRCODE
-Defined to 256, but not used, not documented.  Probably the token
-number for the error token, which POSIX wants to be 256, but which
-Bison might renumber if the user used number 256.  Keep fix and doc?
-Throw away?
-
-Also, why don't we output the token name of the error token in the
-output?  It is explicitly skipped:
+Why don't we output the token name of the error token in the output?  It is
+explicitly skipped:

      /* Skip error token and tokens without identifier.  */
      if (sym != errtoken && id)
@@ -612,7 +607,7 @@ End:

 -----

-Copyright (C) 2001-2004, 2006, 2008-2015, 2018-2019 Free Software
+Copyright (C) 2001-2004, 2006, 2008-2015, 2018-2020 Free Software
 Foundation, Inc.

 This file is part of Bison, the GNU Compiler Compiler.
@@ -4,7 +4,7 @@ scriptversion=2019-01-04.17; # UTC

 # Bootstrap this package from checked-out sources.

-# Copyright (C) 2003-2019 Free Software Foundation, Inc.
+# Copyright (C) 2003-2020 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
@@ -1,6 +1,6 @@
 # Bootstrap configuration.

-# Copyright (C) 2006-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2006-2015, 2018-2020 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
@@ -1,4 +1,4 @@
-# Copyright (C) 2012-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2012-2015, 2018-2020 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
@@ -1,4 +1,4 @@
-# Copyright (C) 2012-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2012-2015, 2018-2020 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
@@ -1,5 +1,24 @@
 #! /usr/bin/env perl

+# Generate a release announcement message.
+
+# Copyright (C) 2007-2020 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;
@@ -1,4 +1,4 @@
-## Copyright (C) 2000-2015, 2018-2019 Free Software Foundation, Inc.
+## Copyright (C) 2000-2015, 2018-2020 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
@@ -3,7 +3,7 @@
 # Update b4_copyright invocations or b4_copyright_years definitions to
 # include the current year.

-# Copyright (C) 2009-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2009-2015, 2018-2020 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
@@ -2,7 +2,7 @@

 # In configure.ac, update PACKAGE_COPYRIGHT_YEAR to the current year.

-# Copyright (C) 2010-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2010-2015, 2018-2020 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
@@ -1,5 +1,24 @@
 #! /usr/bin/env python

+# Update expectations in an Autotest test suite.
+
+# Copyright (C) 2019-2020 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
@@ -1,5 +1,5 @@
 ## Customize maint.mk                           -*- makefile -*-
-## Copyright (C) 2008-2015, 2018-2019 Free Software Foundation, Inc.
+## Copyright (C) 2008-2015, 2018-2020 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
@@ -1,6 +1,6 @@
 # Configure template for GNU Bison.                   -*-Autoconf-*-
 #
-# Copyright (C) 2001-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2001-2015, 2018-2020 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
@@ -26,8 +26,10 @@ m4_pattern_allow([^BISON_USE_NLS$])

 AC_INIT([GNU Bison],
        m4_esyscmd([build-aux/git-version-gen .tarball-version]),
-        [[email protected]])
-AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2019])
+        [[email protected]],
+        [],
+        [https://www.gnu.org/software/bison/])
+AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2020])
 AC_DEFINE_UNQUOTED([PACKAGE_COPYRIGHT_YEAR], [$PACKAGE_COPYRIGHT_YEAR],
                   [The copyright year for this package])

@@ -100,12 +102,41 @@ 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.
-  warn_common='-Wall -Wextra -Wcast-align
+  #
+  # 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 -Wnull-dereference
    -Wno-sign-compare -Wno-tautological-constant-out-of-range-compare
    -Wpointer-arith -Wshadow
-    -Wwrite-strings'
+    -Wwrite-strings
+    -wr188 -wr2259 -wr3179'
  warn_c='-Wbad-function-cast -Wstrict-prototypes'
  warn_cxx='-Wextra-semi -Wnoexcept -Wold-style-cast -Wundefined-func-template
    -Wweak-vtables'
@@ -174,7 +174,7 @@ fill-column: 76
 ispell-dictionary: "american"
 End:

-Copyright (C) 2002, 2008-2015, 2018-2019 Free Software Foundation, Inc.
+Copyright (C) 2002, 2008-2015, 2018-2020 Free Software Foundation, Inc.

 This file is part of GNU Bison.

@@ -1,5 +1,5 @@
 /* Default styling rules for Bison when doing terminal output.
-   Copyright (C) 2019 Free Software Foundation, Inc.
+   Copyright (C) 2019-2020 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
@@ -1,4 +1,4 @@
-## Copyright (C) 2002, 2005-2015, 2018-2019 Free Software Foundation,
+## Copyright (C) 2002, 2005-2015, 2018-2020 Free Software Foundation,
 ## Inc.

 ## This program is free software: you can redistribute it and/or modify
@@ -2,7 +2,7 @@

 # Language-independent M4 Macros for Bison.

-# Copyright (C) 2002, 2004-2015, 2018-2019 Free Software Foundation,
+# Copyright (C) 2002, 2004-2015, 2018-2020 Free Software Foundation,
 # Inc.

 # This program is free software: you can redistribute it and/or modify
@@ -532,9 +532,9 @@ m4_define([b4_any_token_visible_if],
 # ----------------------------
 m4_define([b4_token_format],
 [b4_token_visible_if([$2],
-[m4_quote(m4_format([$1],
-                     [b4_symbol([$2], [id])],
-                     [b4_symbol([$2], b4_api_token_raw_if([[number]], [[user_number]]))]))])])
+[m4_format([[$1]],
+           m4_quote(b4_symbol([$2], [id])),
+           m4_quote(b4_symbol([$2], b4_api_token_raw_if([[number]], [[user_number]]))))])])


 ## ------- ##
@@ -2,7 +2,7 @@

 # C++ skeleton dispatching for Bison.

-# Copyright (C) 2006-2007, 2009-2015, 2018-2019 Free Software
+# Copyright (C) 2006-2007, 2009-2015, 2018-2020 Free Software
 # Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
@@ -2,7 +2,7 @@

 # C++ skeleton for Bison

-# Copyright (C) 2002-2019 Free Software Foundation, Inc.
+# Copyright (C) 2002-2020 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
@@ -2,7 +2,7 @@

 # Common code for C-like languages (C, C++, Java, etc.)

-# Copyright (C) 2012-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2012-2015, 2018-2020 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
@@ -2,7 +2,7 @@

 # C skeleton dispatching for Bison.

-# Copyright (C) 2006-2007, 2009-2015, 2018-2019 Free Software
+# Copyright (C) 2006-2007, 2009-2015, 2018-2020 Free Software
 # Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
@@ -2,7 +2,7 @@

 # C M4 Macros for Bison.

-# Copyright (C) 2002, 2004-2015, 2018-2019 Free Software Foundation,
+# Copyright (C) 2002, 2004-2015, 2018-2020 Free Software Foundation,
 # Inc.

 # This program is free software: you can redistribute it and/or modify
@@ -2,7 +2,7 @@

 # D skeleton dispatching for Bison.

-# Copyright (C) 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2018-2020 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
@@ -2,7 +2,7 @@

 # D language support for Bison

-# Copyright (C) 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2018-2020 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
@@ -2,7 +2,7 @@

 # GLR skeleton for Bison

-# Copyright (C) 2002-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015, 2018-2020 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
@@ -198,7 +198,7 @@ b4_glr_cc_if([],
 [b4_defines_if(
 [b4_output_begin([b4_spec_header_file])
 b4_copyright([Skeleton interface for Bison GLR parsers in C],
-             [2002-2015, 2018-2019])[
+             [2002-2015, 2018-2020])[
 ]b4_cpp_guard_open([b4_spec_header_file])[
 ]b4_shared_declarations[
 ]b4_cpp_guard_close([b4_spec_header_file])[
@@ -212,7 +212,7 @@ b4_copyright([Skeleton interface for Bison GLR parsers in C],

 b4_output_begin([b4_parser_file_name])
 b4_copyright([Skeleton implementation for Bison GLR parsers in C],
-             [2002-2015, 2018-2019])[
+             [2002-2015, 2018-2020])[
 /* C GLR parser skeleton written by Paul Hilfinger.  */

 ]b4_disclaimer[
@@ -1985,7 +1985,8 @@ yyprocessOneStack (yyGLRStack* yystackp, ptrdiff_t yyk,
  while (yystackp->yytops.yystates[yyk] != YY_NULLPTR)
    {
      yyStateNum yystate = yystackp->yytops.yystates[yyk]->yylrState;
-      YY_DPRINTF ((stderr, "Stack %ld Entering state %d\n", yyk, yystate));
+      YY_DPRINTF ((stderr, "Stack %ld Entering state %d\n",
+                   YY_CAST (long, yyk), yystate));

      YY_ASSERT (yystate != YYFINAL);

@@ -1,6 +1,6 @@
 # C++ GLR skeleton for Bison

-# Copyright (C) 2002-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015, 2018-2020 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
@@ -267,7 +267,8 @@ b4_percent_code_get([[requires]])[

 // 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 && 4 <= __clang_major__
+#if defined __APPLE__ && YY_CPLUSPLUS < 201103L \
+    && defined __clang__ && 4 <= __clang_major__
 # pragma clang diagnostic ignored "-Wc++11-long-long"
 #endif

@@ -367,7 +368,7 @@ b4_percent_define_flag_if([[global_tokens_and_yystype]],
 b4_defines_if(
 [b4_output_begin([b4_spec_header_file])
 b4_copyright([Skeleton interface for Bison GLR parsers in C++],
-             [2002-2015, 2018-2019])[
+             [2002-2015, 2018-2020])[
 // C++ GLR parser skeleton written by Akim Demaille.

 ]b4_disclaimer[
@@ -2,7 +2,7 @@

 # Java skeleton dispatching for Bison.

-# Copyright (C) 2007, 2009-2015, 2018-2019 Free Software Foundation,
+# Copyright (C) 2007, 2009-2015, 2018-2020 Free Software Foundation,
 # Inc.

 # This program is free software: you can redistribute it and/or modify
@@ -2,7 +2,7 @@

 # Java language support for Bison

-# Copyright (C) 2007-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2007-2015, 2018-2020 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
@@ -147,18 +147,20 @@ b4_symbol_foreach([b4_token_enum])])])
 # b4-case(ID, CODE)
 # -----------------
 # We need to fool Java's stupid unreachable code detection.
-m4_define([b4_case], [  case $1:
+m4_define([b4_case],
+[  case $1:
  if (yyn == $1)
    $2;
  break;
-    ])
+])

 # b4_predicate_case(LABEL, CONDITIONS)
 # ------------------------------------
-m4_define([b4_predicate_case], [  case $1:
+m4_define([b4_predicate_case],
+[  case $1:
     if (! ($2)) YYERROR;
    break;
-    ])
+])


 ## -------- ##
@@ -361,4 +363,4 @@ m4_define([b4_var_decl],
 # -----------------------
 # Expand to either an empty string or "throws THROWS".
 m4_define([b4_maybe_throws],
-          [m4_ifval($1, [throws $1])])
+          [m4_ifval($1, [ throws $1])])
@@ -1,6 +1,6 @@
 # C++ skeleton for Bison

-# Copyright (C) 2002-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015, 2018-2020 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
@@ -23,6 +23,7 @@ m4_define([b4_value_type_setup_variant])
 # Check the value of %define parse.lac, where LAC stands for lookahead
 # correction.
 b4_percent_define_default([[parse.lac]], [[none]])
+b4_percent_define_check_values([[[[parse.lac]], [[full]], [[none]]]])
 b4_define_flag_if([lac])
 m4_define([b4_lac_flag],
          [m4_if(b4_percent_define_get([[parse.lac]]),
@@ -143,7 +144,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))])])


 m4_pushdef([b4_copyright_years],
-           [2002-2015, 2018-2019])
+           [2002-2015, 2018-2020])

 m4_define([b4_parser_class],
          [b4_percent_define_get([[api.parser.class]])])
@@ -640,7 +641,7 @@ m4_if(b4_prefix, [yy], [],
    if (state == empty_state)
      return empty_symbol;
    else
-      return yystos_[state];
+      return yystos_[+state];
  }

  ]b4_parser_class[::stack_symbol_type::stack_symbol_type ()
@@ -866,7 +867,7 @@ b4_dollar_popdef])[]dnl
  `-----------*/
  yybackup:
    // Try to take a decision without lookahead.
-    yyn = yypact_[yystack_[0].state];
+    yyn = yypact_[+yystack_[0].state];
    if (yy_pact_value_is_default_ (yyn))
      goto yydefault;

@@ -921,7 +922,7 @@ b4_dollar_popdef])[]dnl
      --yyerrstatus_;

    // Shift the lookahead token.
-    yypush_ ("Shifting", static_cast<state_type> (yyn), YY_MOVE (yyla));]b4_lac_if([[
+    yypush_ ("Shifting", state_type (yyn), YY_MOVE (yyla));]b4_lac_if([[
    yy_lac_discard_ ("shift");]])[
    goto yynewstate;

@@ -930,7 +931,7 @@ b4_dollar_popdef])[]dnl
  | yydefault -- do the default action for the current state.  |
  `-----------------------------------------------------------*/
  yydefault:
-    yyn = yydefact_[yystack_[0].state];
+    yyn = yydefact_[+yystack_[0].state];
    if (yyn == 0)
      goto yyerrlab;
    goto yyreduce;
@@ -1057,7 +1058,7 @@ b4_dollar_popdef])[]dnl
      stack_symbol_type error_token;
      for (;;)
        {
-          yyn = yypact_[yystack_[0].state];
+          yyn = yypact_[+yystack_[0].state];
          if (!yy_pact_value_is_default_ (yyn))
            {
              yyn += yy_error_token_;
@@ -1084,7 +1085,7 @@ b4_dollar_popdef])[]dnl

      // Shift the error token.]b4_lac_if([[
      yy_lac_discard_ ("error recovery");]])[
-      error_token.state = static_cast<state_type> (yyn);
+      error_token.state = state_type (yyn);
      yypush_ ("Shifting", YY_MOVE (error_token));
    }
    goto yynewstate;
@@ -1166,13 +1167,13 @@ b4_dollar_popdef])[]dnl
        state_type top_state = (yylac_stack_.empty ()
                                ? yystack_[lac_top].state
                                : yylac_stack_.back ());
-        int yyrule = yypact_[top_state];
+        int yyrule = yypact_[+top_state];
        if (yy_pact_value_is_default_ (yyrule)
            || (yyrule += yytoken) < 0 || yylast_ < yyrule
            || yycheck_[yyrule] != yytoken)
          {
            // Use the default action.
-            yyrule = yydefact_[top_state];
+            yyrule = yydefact_[+top_state];
            if (yyrule == 0)
              {
                YYCDEBUG << " Err\n";
@@ -1339,13 +1340,13 @@ b4_error_verbose_if([state_type yystate, const symbol_type& yyla],
        yyarg[yycount++] = yytname_[yytoken];]b4_lac_if([[

 #if ]b4_api_PREFIX[DEBUG
-        // Execute LAC once. We don't care if it is succesful, we
+        // Execute LAC once. We don't care if it is successful, we
        // only do it for the sake of debugging output.
        if (!yy_lac_established_)
          yy_lac_check_ (yytoken);
 #endif]])[

-        int yyn = yypact_[yystate];
+        int yyn = yypact_[+yystate];
        if (!yy_pact_value_is_default_ (yyn))
          {]b4_lac_if([[
            for (int yyx = 0; yyx < yyntokens_; ++yyx)
@@ -1,6 +1,6 @@
 # D skeleton for Bison -*- autoconf -*-

-# Copyright (C) 2007-2012, 2019 Free Software Foundation, Inc.
+# Copyright (C) 2007-2012, 2019-2020 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
@@ -20,7 +20,7 @@ m4_include(b4_skeletonsdir/[d.m4])

 b4_output_begin([b4_parser_file_name])
 b4_copyright([Skeleton implementation for Bison LALR(1) parsers in D],
-             [2007-2012, 2019])[
+             [2007-2012, 2019-2020])[

 ]b4_percent_define_ifdef([package], [module b4_percent_define_get([package]);
 ])[
@@ -1,6 +1,6 @@
 # Java skeleton for Bison                           -*- autoconf -*-

-# Copyright (C) 2007-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2007-2015, 2018-2020 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
@@ -65,8 +65,8 @@ m4_define([b4_define_state],[[
    int label = YYNEWSTATE;

    /* Error handling.  */
-    int yynerrs_ = 0;
-    ]b4_locations_if([[/* The location where the error started.  */
+    int yynerrs_ = 0;]b4_locations_if([[
+    /* The location where the error started.  */
    ]b4_location_type[ yyerrloc = null;

    /* Location. */
@@ -78,7 +78,7 @@ m4_define([b4_define_state],[[

 ]b4_output_begin([b4_parser_file_name])[
 ]b4_copyright([Skeleton implementation for Bison LALR(1) parsers in Java],
-              [2007-2015, 2018-2019])[
+              [2007-2015, 2018-2020])[
 ]b4_percent_define_ifdef([package], [package b4_percent_define_get([package]);[
 ]])[
 ]b4_user_pre_prologue[
@@ -182,7 +182,7 @@ b4_locations_if([[

 ]b4_token_enums[

-    ]b4_locations_if([[/**
+]b4_locations_if([[/**
     * Method to retrieve the beginning position of the last scanned token.
     * @@return the position at which the last scanned token starts.
     */
@@ -206,13 +206,13 @@ b4_locations_if([[
     * ]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])[;
+    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
+     *]b4_locations_if([[ @@param loc The location of the element to which the
     *                error message is related]])[
     * @@param msg The string for the error message.
     */
@@ -224,22 +224,23 @@ b4_locations_if([[
 ]b4_percent_code_get([[lexer]])[
  }

-  ]])[/**
+]])[
+  /**
   * The object doing lexical analysis for us.
   */
  private Lexer yylexer;

-  ]b4_parse_param_vars[
+]b4_parse_param_vars[

 ]b4_lexer_if([[
  /**
   * Instantiates the Bison-generated parser.
   */
-  public ]b4_parser_class (b4_parse_param_decl([b4_lex_param_decl])[) ]b4_maybe_throws([b4_init_throws])[
+  public ]b4_parser_class (b4_parse_param_decl([b4_lex_param_decl])[)]b4_maybe_throws([b4_init_throws])[
  {
-    ]b4_percent_code_get([[init]])[
+]b4_percent_code_get([[init]])[
    this.yylexer = new YYLexer(]b4_lex_param_call[);
-    ]b4_parse_param_cons[
+]b4_parse_param_cons[
  }
 ]])[

@@ -247,11 +248,11 @@ b4_locations_if([[
   * Instantiates the Bison-generated parser.
   * @@param yylexer The scanner that will supply tokens to the parser.
   */
-  ]b4_lexer_if([[protected]], [[public]]) b4_parser_class[ (]b4_parse_param_decl([[Lexer yylexer]])[) ]b4_maybe_throws([b4_init_throws])[
+  ]b4_lexer_if([[protected]], [[public]]) b4_parser_class[ (]b4_parse_param_decl([[Lexer yylexer]])[)]b4_maybe_throws([b4_init_throws])[
  {
-    ]b4_percent_code_get([[init]])[
+]b4_percent_code_get([[init]])[
    this.yylexer = yylexer;
-    ]b4_parse_param_cons[
+]b4_parse_param_cons[
  }

 ]b4_parse_trace_if([[
@@ -320,8 +321,8 @@ b4_locations_if([[
  }]])[

  private final class YYStack {
-    private int[] stateStack = new int[16];
-    ]b4_locations_if([[private ]b4_location_type[[] locStack = new ]b4_location_type[[16];]])[
+    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;
@@ -334,8 +335,7 @@ b4_locations_if([[
        {
          int[] newStateStack = new int[size * 2];
          System.arraycopy (stateStack, 0, newStateStack, 0, height);
-          stateStack = newStateStack;
-          ]b4_locations_if([[
+          stateStack = newStateStack;]b4_locations_if([[
          ]b4_location_type[[] newLocStack = new ]b4_location_type[[size * 2];
          System.arraycopy (locStack, 0, newLocStack, 0, height);
          locStack = newLocStack;]])
@@ -347,8 +347,8 @@ b4_locations_if([[
          size *= 2;
        }

-      stateStack[height] = state;
-      ]b4_locations_if([[locStack[height] = loc;]])[
+      stateStack[height] = state;]b4_locations_if([[
+      locStack[height] = loc;]])[
      valueStack[height] = value;
    }

@@ -359,8 +359,8 @@ b4_locations_if([[
    public final void pop (int num) {
      // Avoid memory leaks... garbage collection is a white lie!
      if (0 < num) {
-        java.util.Arrays.fill (valueStack, height - num + 1, height + 1, null);
-        ]b4_locations_if([[java.util.Arrays.fill (locStack, height - num + 1, height + 1, null);]])[
+        java.util.Arrays.fill (valueStack, height - num + 1, height + 1, null);]b4_locations_if([[
+        java.util.Arrays.fill (locStack, height - num + 1, height + 1, null);]])[
      }
      height -= num;
    }
@@ -368,8 +368,9 @@ b4_locations_if([[
    public final int stateAt (int i) {
      return stateStack[height - i];
    }
+]b4_locations_if([[

-    ]b4_locations_if([[public final ]b4_location_type[ locationAt (int i) {
+    public final ]b4_location_type[ locationAt (int i) {
      return locStack[height - i];
    }

@@ -452,7 +453,7 @@ b4_locations_if([[
      return yydefgoto_[yysym - yyntokens_];
  }

-  private int yyaction (int yyn, YYStack yystack, int yylen) ]b4_maybe_throws([b4_throws])[
+  private int yyaction (int yyn, YYStack yystack, int yylen)]b4_maybe_throws([b4_throws])[
  {
    /* If YYLEN is nonzero, implement the default value of the action:
       '$$ = $1'.  Otherwise, use the top of the stack.
@@ -460,8 +461,8 @@ b4_locations_if([[
       Otherwise, the following line sets YYVAL to garbage.
       This behavior is undocumented and Bison
       users should not rely upon it.  */
-    ]b4_yystype[ yyval = (0 < yylen) ? yystack.valueAt (yylen - 1) : yystack.valueAt (0);
-    ]b4_locations_if([b4_location_type[ yyloc = yylloc (yystack, yylen);]])[]b4_parse_trace_if([[
+    ]b4_yystype[ yyval = (0 < yylen) ? yystack.valueAt (yylen - 1) : yystack.valueAt (0);]b4_locations_if([[
+    ]b4_location_type[ yyloc = yylloc (yystack, yylen);]])[]b4_parse_trace_if([[

    yyReducePrint (yyn, yystack);]])[

@@ -541,29 +542,28 @@ b4_locations_if([[
   * @@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])])[]])[
+  public boolean parse ()]b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])[]])[
 ]b4_push_if([
  /**
   * Push Parse input from external lexer
   *
   * @@param yylextoken current token
-   * @@param yylexval current lval
-]b4_locations_if([   * @@param yylexloc current position])[
+   * @@param yylexval current lval]b4_locations_if([[
+   * @@param yylexloc current position]])[
   *
   * @@return <tt>YYACCEPT, YYABORT, YYPUSH_MORE</tt>
   */
-  public int push_parse (int yylextoken, b4_yystype yylexval[]b4_locations_if([, b4_location_type yylexloc]))
-      b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])])[
-  {
-    ]b4_locations_if([/* @@$.  */
-    b4_location_type yyloc;])[
+  public int push_parse (int yylextoken, b4_yystype yylexval[]b4_locations_if([, b4_location_type yylexloc]))b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])])[
+  {]b4_locations_if([[
+    /* @@$.  */
+    ]b4_location_type[ yyloc;]])[
 ]b4_push_if([],[[
 ]b4_define_state[]b4_parse_trace_if([[
    yycdebug ("Starting parse\n");]])[
    yyerrstatus_ = 0;

    /* Initialize the stack.  */
-    yystack.push (yystate, yylval ]b4_locations_if([, yylloc])[);
+    yystack.push (yystate, yylval]b4_locations_if([, yylloc])[);
 ]m4_ifdef([b4_initial_action], [
 b4_dollar_pushdef([yylval], [], [], [yylloc])dnl
    b4_user_initial_action
@@ -706,7 +706,8 @@ b4_dollar_popdef[]dnl
            yyerror (]b4_locations_if([yylloc, ])[yysyntax_error (yystate, yytoken));
          }

-        ]b4_locations_if([yyerrloc = yylloc;])[
+]b4_locations_if([[
+        yyerrloc = yylloc;]])[
        if (yyerrstatus_ == 3)
          {
            /* If just tried and failed to reuse lookahead token after an
@@ -730,8 +731,8 @@ b4_dollar_popdef[]dnl
      /*-------------------------------------------------.
      | errorlab -- error raised explicitly by YYERROR.  |
      `-------------------------------------------------*/
-      case YYERROR:
-        ]b4_locations_if([yyerrloc = yystack.locationAt (yylen - 1);])[
+      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);
@@ -765,7 +766,8 @@ b4_dollar_popdef[]dnl
            if (yystack.height == 0)
              ]b4_push_if([{label = YYABORT; break;}],[return false;])[

-            ]b4_locations_if([yyerrloc = yystack.locationAt (0);])[
+]b4_locations_if([[
+            yyerrloc = yystack.locationAt (0);]])[
            yystack.pop ();
            yystate = yystack.stateAt (0);]b4_parse_trace_if([[
            if (0 < yydebug)
@@ -776,12 +778,12 @@ b4_dollar_popdef[]dnl
            /* Leave the switch.  */
            break;

-]b4_locations_if([
+]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);])[
+        yystack.pop (2);]])[

        /* Shift the error token.  */]b4_parse_trace_if([[
        yySymbolPrint ("Shifting", yystos_[yyn],
@@ -823,10 +825,10 @@ b4_dollar_popdef[]dnl
    this.label = YYNEWSTATE;

    /* Error handling.  */
-    this.yynerrs_ = 0;
-    ]b4_locations_if([/* The location where the error started.  */
+    this.yynerrs_ = 0;]b4_locations_if([[
+    /* The location where the error started.  */
    this.yyerrloc = null;
-    this.yylloc = new b4_location_type (null, null);])[
+    this.yylloc = new ]b4_location_type[ (null, null);]])[

    /* Semantic value of the lookahead.  */
    this.yylval = null;
@@ -846,8 +848,7 @@ b4_dollar_popdef[]dnl
   *
   * @@return <tt>YYACCEPT, YYABORT, YYPUSH_MORE</tt>
   */
-  public int push_parse (int yylextoken, b4_yystype yylexval, b4_position_type yylexpos)
-      b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])
+  public int push_parse (int yylextoken, b4_yystype yylexval, b4_position_type yylexpos)b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])
  {
    return push_parse (yylextoken, yylexval, new b4_location_type (yylexpos));
  }
@@ -862,7 +863,7 @@ b4_dollar_popdef[]dnl
   * @@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])])[
+  public boolean parse ()]b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])[
  {
    if (yylexer == null)
      throw new NullPointerException("Null Lexer");
@@ -872,9 +873,9 @@ b4_dollar_popdef[]dnl
      ]b4_yystype[ lval = yylexer.getLVal();
 ]b4_locations_if([dnl
      b4_location_type yyloc = new b4_location_type (yylexer.getStartPos (),
-                                            yylexer.getEndPos ());])[
-      ]b4_locations_if([status = push_parse(token,lval,yyloc);],[
-      status = push_parse(token,lval);])[
+                                            yylexer.getEndPos ());])[]b4_locations_if([[
+      status = push_parse(token,lval,yyloc);]], [[
+      status = push_parse(token,lval);]])[
    } while (status == YYPUSH_MORE);
    return (status == YYACCEPT);
  }
@@ -1,6 +1,6 @@
 # C++ skeleton for Bison

-# Copyright (C) 2002-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015, 2018-2020 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 +16,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.

 m4_pushdef([b4_copyright_years],
-           [2002-2015, 2018-2019])
+           [2002-2015, 2018-2020])


 # b4_position_file
@@ -1,6 +1,6 @@
 # C++ skeleton for Bison

-# Copyright (C) 2002-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015, 2018-2020 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
@@ -1,6 +1,6 @@
 # C++ skeleton for Bison

-# Copyright (C) 2002-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015, 2018-2020 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
@@ -1,11 +1,11 @@
 #                                                            -*- C -*-
 # Yacc compatible skeleton for Bison

-# Copyright (C) 1984, 1989-1990, 2000-2015, 2018-2019 Free Software
+# Copyright (C) 1984, 1989-1990, 2000-2015, 2018-2020 Free Software
 # Foundation, Inc.

 m4_pushdef([b4_copyright_years],
-           [1984, 1989-1990, 2000-2015, 2018-2019])
+           [1984, 1989-1990, 2000-2015, 2018-2020])

 # 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
@@ -673,7 +673,7 @@ static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =

 /* Error token number */
 #define YYTERROR        1
-#define YYERRCODE       256
+#define YYERRCODE       ]b4_symbol(1, user_number)[

 ]b4_locations_if([[
 ]b4_yylloc_default_define[
@@ -755,7 +755,7 @@ do {                                                            \
    {
      YYFPRINTF (stderr, "   $%d = ", yyi + 1);
      yy_symbol_print (stderr,
-                       yystos[yyssp[yyi + 1 - yynrhs]],
+                       yystos[+yyssp[yyi + 1 - yynrhs]],
                       &]b4_rhs_value(yynrhs, yyi + 1)[
                       ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
                       b4_user_args[);
@@ -955,12 +955,12 @@ yy_lac (yy_state_t *yyesa, yy_state_t **yyes,
    }
  while (1)
    {
-      int yyrule = yypact[*yyesp];
+      int yyrule = yypact[+*yyesp];
      if (yypact_value_is_default (yyrule)
          || (yyrule += yytoken) < 0 || YYLAST < yyrule
          || yycheck[yyrule] != yytoken)
        {
-          yyrule = yydefact[*yyesp];
+          yyrule = yydefact[+*yyesp];
          if (yyrule == 0)
            {
              YYDPRINTF ((stderr, " Err\n"));
@@ -1184,7 +1184,7 @@ yysyntax_error (YYPTRDIFF_T *yymsg_alloc, char **yymsg,
  */
  if (yytoken != YYEMPTY)
    {
-      int yyn = yypact[*yyssp];
+      int yyn = yypact[+*yyssp];
      YYPTRDIFF_T yysize0 = yytnamerr (YY_NULLPTR, yytname[yytoken]);
      yysize = yysize0;]b4_lac_if([[
      YYDPRINTF ((stderr, "Constructing syntax error message\n"));]])[
@@ -1940,7 +1940,7 @@ yyreturn:
  while (yyssp != yyss)
    {
      yydestruct ("Cleanup: popping",
-                  yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
+                  yystos[+*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
      YYPOPSTACK (1);
    }
 #ifndef yyoverflow
@@ -3,7 +3,7 @@
 <!--
    bison.xsl - common templates for Bison XSLT.

-    Copyright (C) 2007-2015, 2018-2019 Free Software Foundation, Inc.
+    Copyright (C) 2007-2015, 2018-2020 Free Software Foundation, Inc.

    This file is part of Bison, the GNU Compiler Compiler.

@@ -3,7 +3,7 @@
 <!--
    xml2dot.xsl - transform Bison XML Report into DOT.

-    Copyright (C) 2007-2015, 2018-2019 Free Software Foundation, Inc.
+    Copyright (C) 2007-2015, 2018-2020 Free Software Foundation, Inc.

    This file is part of Bison, the GNU Compiler Compiler.

@@ -3,7 +3,7 @@
 <!--
    xml2text.xsl - transform Bison XML Report into plain text.

-    Copyright (C) 2007-2015, 2018-2019 Free Software Foundation, Inc.
+    Copyright (C) 2007-2015, 2018-2020 Free Software Foundation, Inc.

    This file is part of Bison, the GNU Compiler Compiler.

@@ -3,7 +3,7 @@
 <!--
    xml2html.xsl - transform Bison XML Report into XHTML.

-    Copyright (C) 2007-2015, 2018-2019 Free Software Foundation, Inc.
+    Copyright (C) 2007-2015, 2018-2020 Free Software Foundation, Inc.

    This file is part of Bison, the GNU Compiler Compiler.

@@ -16,6 +16,7 @@
 /bison.help
 /bison.html
 /bison.info
+/bison.info.bak
 /bison.log
 /bison.pdf
 /bison.ps
@@ -79,7 +79,7 @@
 This manual (@value{UPDATED}) is for GNU Bison (version @value{VERSION}),
 the GNU parser generator.

-Copyright @copyright{} 1988-1993, 1995, 1998-2015, 2018-2019 Free
+Copyright @copyright{} 1988--1993, 1995, 1998--2015, 2018--2020 Free
 Software Foundation, Inc.

@quotation
@@ -5841,7 +5841,10 @@ states and what is done for each type of lookahead token in that state.

@deffn {Directive} %yacc
 Pretend the option @option{--yacc} was given, i.e., imitate Yacc, including
-its naming conventions.  @xref{Tuning the Parser}, for more.
+its naming conventions.  Only makes sense with the @file{yacc.c}
+skeleton. @xref{Tuning the Parser}, for more.
+
+Of course @code{%yacc} is a Bison extension@dots{}
@end deffn


@@ -9971,10 +9974,30 @@ When a Bison grammar compiles properly but parses ``incorrectly'', the

@node Enabling Traces
@subsection  Enabling Traces
-There are several means to enable compilation of trace facilities:
+There are several means to enable compilation of trace facilities, in
+decreasing order of preference:

@table @asis
-@item the macro @code{YYDEBUG}
+@item the variable @samp{parse.trace}
+@findex %define parse.trace
+Add the @samp{%define parse.trace} directive (@pxref{%define
+Summary,,parse.trace}), or pass the @option{-Dparse.trace} option
+(@pxref{Tuning the Parser}).  This is a Bison extension.  Unless POSIX and
+Yacc portability matter to you, this is the preferred solution.
+
+@item the option @option{-t} (POSIX Yacc compliant)
+@itemx the option @option{--debug} (Bison extension)
+Use the @samp{-t} option when you run Bison (@pxref{Invocation, ,Invoking
+Bison}).  With @samp{%define api.prefix @{c@}}, it defines @code{CDEBUG} to
+1, otherwise it defines @code{YYDEBUG} to 1.
+
+@item the directive @samp{%debug} (deprecated)
+@findex %debug
+Add the @code{%debug} directive (@pxref{Decl Summary, ,Bison Declaration
+Summary}).  This Bison extension is maintained for backward compatibility
+with previous versions of Bison; use @code{%define parse.trace} instead.
+
+@item the macro @code{YYDEBUG} (C/C++ only)
@findex YYDEBUG
 Define the macro @code{YYDEBUG} to a nonzero value when you compile the
 parser.  This is compliant with POSIX Yacc.  You could use
@@ -9984,87 +10007,66 @@ Prologue}).

 If the @code{%define} variable @code{api.prefix} is used (@pxref{Multiple
 Parsers, ,Multiple Parsers in the Same Program}), for instance @samp{%define
-api.prefix x}, then if @code{CDEBUG} is defined, its value controls the
+api.prefix @{c@}}, then if @code{CDEBUG} is defined, its value controls the
 tracing feature (enabled if and only if nonzero); otherwise tracing is
 enabled if and only if @code{YYDEBUG} is nonzero.
-
-@item the option @option{-t} (POSIX Yacc compliant)
-@itemx the option @option{--debug} (Bison extension)
-Use the @samp{-t} option when you run Bison (@pxref{Invocation, ,Invoking
-Bison}).  With @samp{%define api.prefix @{c@}}, it defines @code{CDEBUG} to 1,
-otherwise it defines @code{YYDEBUG} to 1.
-
-@item the directive @samp{%debug}
-@findex %debug
-Add the @code{%debug} directive (@pxref{Decl Summary, ,Bison Declaration
-Summary}).  This Bison extension is maintained for backward
-compatibility with previous versions of Bison.
-
-@item the variable @samp{parse.trace}
-@findex %define parse.trace
-Add the @samp{%define parse.trace} directive (@pxref{%define
-Summary,,parse.trace}), or pass the @option{-Dparse.trace} option
-(@pxref{Tuning the Parser}).  This is a Bison extension, which is especially
-useful for languages that don't use a preprocessor.  Unless POSIX and Yacc
-portability matter to you, this is the preferred solution.
@end table

 We suggest that you always enable the trace option so that debugging is
 always possible.

@findex YYFPRINTF
-The trace facility outputs messages with macro calls of the form
-@code{YYFPRINTF (stderr, @var{format}, @var{args})} where
-@var{format} and @var{args} are the usual @code{printf} format and variadic
-arguments.  If you define @code{YYDEBUG} to a nonzero value but do not
-define @code{YYFPRINTF}, @code{<stdio.h>} is automatically included
-and @code{YYFPRINTF} is defined to @code{fprintf}.
+In C the trace facility outputs messages with macro calls of the form
+@code{YYFPRINTF (stderr, @var{format}, @var{args})} where @var{format} and
+@var{args} are the usual @code{printf} format and variadic arguments.  If
+you define @code{YYDEBUG} to a nonzero value but do not define
+@code{YYFPRINTF}, @code{<stdio.h>} is automatically included and
+@code{YYFPRINTF} is defined to @code{fprintf}.

-Once you have compiled the program with trace facilities, the way to
-request a trace is to store a nonzero value in the variable @code{yydebug}.
-You can do this by making the C code do it (in @code{main}, perhaps), or
-you can alter the value with a C debugger.
+Once you have compiled the program with trace facilities, the way to request
+a trace is to store a nonzero value in the variable @code{yydebug}.  You can
+do this by making the C code do it (in @code{main}, perhaps), or you can
+alter the value with a C debugger.

-Each step taken by the parser when @code{yydebug} is nonzero produces a
-line or two of trace information, written on @code{stderr}.  The trace
-messages tell you these things:
+Each step taken by the parser when @code{yydebug} is nonzero produces a line
+or two of trace information, written on @code{stderr}.  The trace messages
+tell you these things:

@itemize @bullet
@item
 Each time the parser calls @code{yylex}, what kind of token was read.

@item
-Each time a token is shifted, the depth and complete contents of the
-state stack (@pxref{Parser States}).
+Each time a token is shifted, the depth and complete contents of the state
+stack (@pxref{Parser States}).

@item
-Each time a rule is reduced, which rule it is, and the complete contents
-of the state stack afterward.
+Each time a rule is reduced, which rule it is, and the complete contents of
+the state stack afterward.
@end itemize

 To make sense of this information, it helps to refer to the automaton
-description file (@pxref{Understanding, ,Understanding Your Parser}).
-This file shows the meaning of each state in terms of
-positions in various rules, and also what each state will do with each
-possible input token.  As you read the successive trace messages, you
-can see that the parser is functioning according to its specification in
-the listing file.  Eventually you will arrive at the place where
-something undesirable happens, and you will see which parts of the
-grammar are to blame.
+description file (@pxref{Understanding, ,Understanding Your Parser}).  This
+file shows the meaning of each state in terms of positions in various rules,
+and also what each state will do with each possible input token.  As you
+read the successive trace messages, you can see that the parser is
+functioning according to its specification in the listing file.  Eventually
+you will arrive at the place where something undesirable happens, and you
+will see which parts of the grammar are to blame.

 The parser implementation file is a C/C++/Java program and you can use
 debuggers on it, but it's not easy to interpret what it is doing.  The
-parser function is a finite-state machine interpreter, and aside from
-the actions it executes the same code over and over.  Only the values
-of variables show where in the grammar it is working.
+parser function is a finite-state machine interpreter, and aside from the
+actions it executes the same code over and over.  Only the values of
+variables show where in the grammar it is working.

@node Mfcalc Traces
@subsection Enabling Debug Traces for @code{mfcalc}

 The debugging information normally gives the token type of each token read,
 but not its semantic value.  The @code{%printer} directive allows specify
-how semantic values are reported, see @ref{Printer Decl, , Printing
-Semantic Values}.
+how semantic values are reported, see @ref{Printer Decl, , Printing Semantic
+Values}.

 As a demonstration of @code{%printer}, consider the multi-function
 calculator, @code{mfcalc} (@pxref{Multi-function Calc}).  To enable run-time
@@ -10229,7 +10231,7 @@ Cleanup: popping nterm input ()
@subsection The @code{YYPRINT} Macro
@findex YYPRINT

-The @code{%printer} directive was introduced in Bison 1.50 (Novembre 2002).
+The @code{%printer} directive was introduced in Bison 1.50 (November 2002).
 Before then, @code{YYPRINT} provided a similar feature, but only for
 terminal symbols and only with the @file{yacc.c} skeleton.

@@ -10858,11 +10860,10 @@ different diagnostics to be generated (it implies @option{-Wyacc}), and may
 change behavior in other minor ways.  Most importantly, imitate Yacc's
 output file name conventions, so that the parser implementation file is
 called @file{y.tab.c}, and the other outputs are called @file{y.output} and
-@file{y.tab.h}.  Also, if generating a deterministic parser in C, generate
-@code{#define} statements in addition to an @code{enum} to associate token
-numbers with token names.  Thus, the following shell script can substitute
-for Yacc, and the Bison distribution contains such a script for
-compatibility with POSIX:
+@file{y.tab.h}.  Also, generate @code{#define} statements in addition to an
+@code{enum} to associate token numbers with token names.  Thus, the
+following shell script can substitute for Yacc, and the Bison distribution
+contains such a script for compatibility with POSIX:

@example
 #! /bin/sh
@@ -10870,9 +10871,9 @@ bison -y "$@@"
@end example

 The @option{-y}/@option{--yacc} option is intended for use with traditional
-Yacc grammars.  If your grammar uses Bison extensions like
-@samp{%glr-parser}, Bison might not be Yacc-compatible even if this option
-is specified.
+Yacc grammars.  This option only makes sense for the default C skeleton,
+@file{yacc.c}.  If your grammar uses Bison extensions Bison cannot be
+Yacc-compatible, even if this option is specified.
@end table

@node Output Files
@@ -14169,7 +14170,7 @@ it.  Using @samp{%define parse.error verbose} is preferred
@end deffn

@deffn {Macro} YYFPRINTF
-Macro used to output run-time traces.
+Macro used to output run-time traces in C.
@xref{Enabling Traces}.
@end deffn

@@ -14605,7 +14606,7 @@ London, Department of Computer Science, TR-00-12 (December 2000).
@c LocalWords: strncmp intval tindex lvalp locp llocp typealt YYBACKUP subrange
@c LocalWords: YYEMPTY YYEOF YYRECOVERING yyclearin GE def UMINUS maybeword loc
@c LocalWords: Johnstone Shamsa Sadaf Hussain Tomita TR uref YYMAXDEPTH inline
-@c LocalWords: YYINITDEPTH stmts ref initdcl maybeasm notype Lookahead
+@c LocalWords: YYINITDEPTH stmts ref initdcl maybeasm notype Lookahead ctx
@c LocalWords: hexflag STR exdent itemset asis DYYDEBUG YYFPRINTF args Autoconf
@c LocalWords: ypp yxx itemx tex leaderfill Troubleshouting sqrt Graphviz
@c LocalWords: hbox hss hfill tt ly yyin fopen fclose ofirst gcc ll lookahead
@@ -14649,10 +14650,12 @@ London, Department of Computer Science, TR-00-12 (December 2000).
@c LocalWords: Relocatability exprs fixit Wyacc parseable fixits ffixit svg
@c LocalWords: DNDEBUG cstring Wzero workalike POPL workalikes byacc UCB
@c LocalWords: Penello's Penello Byson Byson's Corbett's CSD TOPLAS PDP
-@c LocalWords: Beazley's goyacc ocamlyacc SIGACT SIGPLAN colorWarning
+@c LocalWords: Beazley's goyacc ocamlyacc SIGACT SIGPLAN colorWarning exVal
@c LocalWords: setcolor rgbError colorError rgbNotice colorNotice derror
@c LocalWords: colorOff maincolor inlineraw darkviolet darkcyan dwarning
-@c LocalWords: dnotice copyable stdint ptrdiff bufsize
+@c LocalWords: dnotice copyable stdint ptrdiff bufsize yyreport invariants
+@c LocalWords: xrefautomaticsectiontitle yysyntax yysymbol ARGMAX cond
+@c LocalWords: Wdangling

@c Local Variables:
@c ispell-dictionary: "american"
@@ -1,4 +1,4 @@
-## Copyright (C) 2001-2003, 2005-2015, 2018-2019 Free Software
+## Copyright (C) 2001-2003, 2005-2015, 2018-2020 Free Software
 ## Foundation, Inc.

 ## This program is free software: you can redistribute it and/or modify
@@ -19,7 +19,7 @@
 \def\finalout{\overfullrule=0pt}
 %\finalout

-% Copyright (c) 1998, 2001, 2009-2015, 2018-2019 Free Software
+% Copyright (c) 1998, 2001, 2009--2015, 2018--2020 Free Software
 % Foundation, Inc.
 %
 % This file is part of Bison.
@@ -16,7 +16,7 @@ straightforward use of _build/src/bison would.)

 --

-Copyright (C) 2006, 2009-2015, 2018-2019 Free Software Foundation, Inc.
+Copyright (C) 2006, 2009-2015, 2018-2020 Free Software Foundation, Inc.

 This file is part of Bison, the GNU Compiler Compiler.

@@ -1,6 +1,6 @@
 #! /usr/bin/perl -w

-# Copyright (C) 2006, 2008-2015, 2018-2019 Free Software Foundation,
+# Copyright (C) 2006, 2008-2015, 2018-2020 Free Software Foundation,
 # Inc.
 #
 # This file is part of Bison, the GNU Compiler Compiler.
@@ -100,7 +100,7 @@ Artificial grammar with very long rules.

 =item B<-h>, B<--help>

-Display this message and exit succesfully.  The more verbose, the more
+Display this message and exit successfully.  The more verbose, the more
 details.

 =item B<-i>, B<--iterations>=I<integer>
@@ -1,4 +1,4 @@
-## Copyright (C) 2006, 2008-2015, 2018-2019 Free Software Foundation,
+## Copyright (C) 2006, 2008-2015, 2018-2020 Free Software Foundation,
 ## Inc.

 ## This program is free software: you can redistribute it and/or modify
@@ -17,7 +17,7 @@ fill-column: 76
 ispell-dictionary: "american"
 End:

-Copyright (C) 2018-2019 Free Software Foundation, Inc.
+Copyright (C) 2018-2020 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
@@ -46,7 +46,7 @@ fill-column: 76
 ispell-dictionary: "american"
 End:

-Copyright (C) 2018-2019 Free Software Foundation, Inc.
+Copyright (C) 2018-2020 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
@@ -55,5 +55,5 @@ 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.

-# LocalWords:  mfcalc calc parsers yy ispell american
+LocalWords:  mfcalc calc parsers yy ispell american
 --->
@@ -36,22 +36,14 @@ fill-column: 76
 ispell-dictionary: "american"
 End:

-Copyright (C) 2018-2019 Free Software Foundation, Inc.
+Copyright (C) 2018-2020 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/>.
-
-# LocalWords:  calc parsers yy MERCHANTABILITY Ctrl ispell american
+LocalWords:  calc parsers yy MERCHANTABILITY Ctrl ispell american
 --->
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2005-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2005-2015, 2018-2020 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
@@ -1,4 +1,4 @@
-## Copyright (C) 2005-2006, 2008-2015, 2018-2019 Free Software
+## Copyright (C) 2005-2006, 2008-2015, 2018-2020 Free Software
 ## Foundation, Inc.
 ##
 ## This program is free software: you can redistribute it and/or modify
@@ -1,4 +1,4 @@
-## Copyright (C) 2018-2019 Free Software Foundation, Inc.
+## Copyright (C) 2018-2020 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
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2018-2020 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
@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2008-2015, 2018-2019 Free Software Foundation, Inc.
+  Copyright (C) 2008-2015, 2018-2020 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
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2018-2020 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
@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2008-2015, 2018-2019 Free Software Foundation, Inc.
+  Copyright (C) 2008-2015, 2018-2020 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
@@ -45,7 +45,9 @@ fill-column: 76
 ispell-dictionary: "american"
 End:

-Copyright (C) 2018-2019 Free Software Foundation, Inc.
+Copyright (C) 2018-2020 Free Software Foundation, Inc.
+
+This file is part of GNU 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
@@ -9,20 +9,15 @@ fill-column: 76
 ispell-dictionary: "american"
 End:

-Copyright (C) 2019 Free Software Foundation, Inc.
+Copyright (C) 2019-2020 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.
+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 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/>.
 --->
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2019 Free Software Foundation, Inc.
+# Copyright (C) 2019-2020 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
@@ -1,4 +1,4 @@
-## Copyright (C) 2019 Free Software Foundation, Inc.
+## Copyright (C) 2019-2020 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
@@ -9,20 +9,14 @@ fill-column: 76
 ispell-dictionary: "american"
 End:

-Copyright (C) 2018-2019 Free Software Foundation, Inc.
+Copyright (C) 2018-2020 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 <http://www.gnu.org/licenses/>.
+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.
 --->
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2018-2020 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
@@ -1,4 +1,4 @@
-## Copyright (C) 2018-2019 Free Software Foundation, Inc.
+## Copyright (C) 2018-2020 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
@@ -1,4 +1,4 @@
-## Copyright (C) 2018-2019 Free Software Foundation, Inc.
+## Copyright (C) 2018-2020 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
@@ -1,4 +1,4 @@
-## Copyright (C) 2005-2006, 2008-2015, 2018-2019 Free Software
+## Copyright (C) 2005-2006, 2008-2015, 2018-2020 Free Software
 ## Foundation, Inc.
 ##
 ## This program is free software: you can redistribute it and/or modify
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2005-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2005-2015, 2018-2020 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
@@ -26,20 +26,13 @@ fill-column: 76
 ispell-dictionary: "american"
 End:

-Copyright (C) 2018-2019 Free Software Foundation, Inc.
+Copyright (C) 2018-2020 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/>.
 --->
@@ -1,4 +1,4 @@
-## Copyright (C) 2019 Free Software Foundation, Inc.
+## Copyright (C) 2019-2020 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
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2018-2020 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
@@ -15,6 +15,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.

+seq 0 >/dev/null || exit 77
+
 cat >input <<EOF
 1+2*3
 EOF
@@ -1,4 +1,4 @@
-## Copyright (C) 2005-2006, 2008-2015, 2018-2019 Free Software
+## Copyright (C) 2005-2006, 2008-2015, 2018-2020 Free Software
 ## Foundation, Inc.
 ##
 ## This program is free software: you can redistribute it and/or modify
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2005-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2005-2015, 2018-2020 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
@@ -15,7 +15,7 @@ fill-column: 76
 ispell-dictionary: "american"
 End:

-Copyright (C) 2018-2019 Free Software Foundation, Inc.
+Copyright (C) 2018-2020 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
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2018-2020 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
@@ -1,4 +1,4 @@
-## Copyright (C) 2018-2019 Free Software Foundation, Inc.
+## Copyright (C) 2018-2020 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
@@ -3,7 +3,7 @@

 # This file is part of GNU Bison

-# Copyright (C) 1992, 2000-2001, 2005-2006, 2009-2015, 2018-2019 Free
+# Copyright (C) 1992, 2000-2001, 2005-2006, 2009-2015, 2018-2020 Free
 # Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2018-2020 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 +16,7 @@ fill-column: 76
 ispell-dictionary: "american"
 End:

-Copyright (C) 2018-2019 Free Software Foundation, Inc.
+Copyright (C) 2018-2020 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
@@ -1,4 +1,4 @@
-## Copyright (C) 2018-2019 Free Software Foundation, Inc.
+## Copyright (C) 2018-2020 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
@@ -1,4 +1,4 @@
-## Copyright (C) 2005, 2008-2015, 2018-2019 Free Software Foundation,
+## Copyright (C) 2005, 2008-2015, 2018-2020 Free Software Foundation,
 ## Inc.
 ##
 ## This program is free software: you can redistribute it and/or modify
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2005-2015, 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2005-2015, 2018-2020 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
@@ -31,18 +31,18 @@ exit=true
 cwd=$(pwd)

 # The exercised program.
-for p in "$cwd/examples/$medir/$me"
-do
-    if test -x "$p"; then
-        prog=$p
-        break
-    elif test -f "$p.class"; then
-        pwd
-        prog="$SHELL $cwd/javaexec.sh -cp $(dirname $p) $(basename $p)"
-        break
-    fi
-done
-if test x"$prog" = x; then
+abs_medir=$cwd/examples/$medir
+if test -x "$abs_medir/$me"; then
+    prog ()
+    {
+        "$abs_medir/$me" "$@"
+    }
+elif test -f "$abs_medir/$me.class"; then
+    prog ()
+    {
+        "$SHELL" "$cwd/javaexec.sh" -cp "$abs_medir" "$me" "$@"
+    }
+else
    echo "$me: ERROR: cannot find program to exercise in:"
    echo "$me: ERROR:   $cwd/examples/$medir/$me"
    exit 1
@@ -55,7 +55,7 @@ cleanup ()
 {
  status=$?
  if test -z "$DEBUG"; then
-     cd $cwd
+     cd "$cwd"
     rm -rf $$.dir
  fi
  exit $status
@@ -82,7 +82,7 @@ run ()
  shift
  # Effective exit status.
  sta_eff=0
-  $prog "$@" - <input >out_eff 2>err_eff || sta_eff=$?
+  prog "$@" - <input >out_eff 2>err_eff || sta_eff=$?
  # Combine effective output and error streams.
  out_eff=$(cat out_eff && $noerr || sed -e 's/^/err: /g' err_eff)
  if test $sta_eff -eq $sta_exp; then
@@ -138,13 +138,19 @@
 /isnanl-nolibm.h
 /isnanl.c
 /iswblank.c
+/iswdigit.c
+/iswxdigit.c
 /itold.c
+/lc-charset-dispatch.c
+/lc-charset-dispatch.h
 /ldexpl.c
 /libc-config.h
 /limits.h
 /limits.in.h
 /localcharset.c
 /localcharset.h
+/locale.h
+/locale.in.h
 /localtime-buffer.c
 /localtime-buffer.h
 /lstat.c
@@ -158,10 +164,14 @@
 /mbchar.h
 /mbfile.c
 /mbfile.h
+/mbrtowc-impl-utf8.h
+/mbrtowc-impl.h
 /mbrtowc.c
 /mbsinit.c
 /mbswidth.c
 /mbswidth.h
+/mbtowc-lock.c
+/mbtowc-lock.h
 /memchr.c
 /memchr.valgrind
 /minmax.h
@@ -209,6 +219,9 @@
 /sched.h
 /sched.in.h
 /setenv.c
+/setlocale-lock.c
+/setlocale_null.c
+/setlocale_null.h
 /sig-handler.c
 /sig-handler.h
 /sigaction.c
@@ -1,6 +1,6 @@
 /* get-errno.c - get and set errno.

-   Copyright (C) 2002, 2006, 2009-2015, 2018-2019 Free Software
+   Copyright (C) 2002, 2006, 2009-2015, 2018-2020 Free Software
   Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
@@ -1,6 +1,6 @@
 /* get-errno.h - get and set errno.

-   Copyright (C) 2002, 2009-2015, 2018-2019 Free Software Foundation,
+   Copyright (C) 2002, 2009-2015, 2018-2020 Free Software Foundation,
   Inc.

   This program is free software: you can redistribute it and/or modify
@@ -1,4 +1,4 @@
-## Copyright (C) 2001-2015, 2018-2019 Free Software Foundation, Inc.
+## Copyright (C) 2001-2015, 2018-2020 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
@@ -1,6 +1,6 @@
 /* Yacc library main function.

-   Copyright (C) 2002, 2009-2015, 2018-2019 Free Software Foundation,
+   Copyright (C) 2002, 2009-2015, 2018-2020 Free Software Foundation,
   Inc.

   This file is part of Bison, the GNU Compiler Compiler.
@@ -1,5 +1,5 @@
 /* Concatenate path components.
-   Copyright (C) 2018-2019 Free Software Foundation, Inc.
+   Copyright (C) 2018-2020 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
@@ -1,5 +1,5 @@
 /* Concatenate path components.
-   Copyright (C) 2018-2019 Free Software Foundation, Inc.
+   Copyright (C) 2018-2020 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
@@ -1,7 +1,7 @@
 /* This file contains the definitions for timing variables used to -*- C -*-
   measure run-time performance of the compiler.

-   Copyright (C) 2002, 2007, 2009-2015, 2018-2019 Free Software
+   Copyright (C) 2002, 2007, 2009-2015, 2018-2020 Free Software
   Foundation, Inc.

   Contributed by Akim Demaille <akim@freefriends.org>.
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Akim Demaille	f49684a577	version 3.5.3 * NEWS: Record release date.	2020-03-08 08:30:41 +01:00
Akim Demaille	044ad1288c	news: update for 3.5.3	2020-03-08 08:17:13 +01:00
Akim Demaille	e3812bb8c3	yacc.c: make sure we properly propagated the user's number for error * data/skeletons/yacc.c (YYERRCODE): Be truthful. * tests/input.at (Redefining the error token): Check that.	2020-03-08 08:10:11 +01:00
Akim Demaille	cfcd823e16	diagnostics: don't crash because of repeated definitions of error According to https://www.unix.com/man-page/POSIX/1posix/yacc/, the user is allowed to specify her user number for the error token: The token error shall be reserved for error handling. The name error can be used in grammar rules. It indicates places where the parser can recover from a syntax error. The default value of error shall be 256. Its value can be changed using a %token declaration. The lexical analyzer should not return the value of error. I think this feature is useless, the user should not have to deal with that. The intend is probably to give the user a means to use 256 if she wants to, but provided "error" cleared the path first by being assigned another number. In the case of Bison, 256 is assigned to "error" at the end if the user did not use it for a token of hers. So this feature is useless. Yet it is valid, and if the user assigns twice a token number to "error", then the second time we want to complain about it and want to show the original definition. At this point, we try to display the built-in definition of "error", whose location is NULL, and we crash. Rather, the location of the first user definition of "error" should become its defining location. Reported byg Ahcheong Lee. https://lists.gnu.org/r/bug-bison/2020-03/msg00007.html * src/symtab.c (symbol_class_set): If this is a declaration and the symbol was not declared yet, keep this as defining location. * tests/input.at (Redefining the error token): New.	2020-03-08 08:10:11 +01:00
Akim Demaille	2f02d9beae	style: initialize some struct members * src/symtab.c (sym_content_new): Initialize all the location members. Not needed by the code, but disturbing values when using a debugger.	2020-03-08 08:10:11 +01:00
Akim Demaille	b638603477	diagnostics: beware of zero-width characters Currenly we rely on (visual) width of the characters to decide where to open and close the styling of the quoted lines. This breaks when we deal with zero-width characters: we cannot just rely on (visual) columns, we need to know whether we are before, inside, or after the highlighted portion. * src/location.c (location_caret): col_end: no longer add 1, "regular" characters have a width of 1, only 0-width characters have 0-width. opened: replace with 'state', a three-valued enum. Don't reopen the style if we already did. * tests/diagnostics.at (Zero-width characters): New.	2020-03-08 08:10:11 +01:00
Akim Demaille	e21ff47f5d	diagnostics: be sure to close the styling when lines are too short bar.y:4.12-17: <error>error:</error> redefining user token number of foo - 4 \| %token foo <error>123 + 4 \| %token foo <error>123</error> \| <error>^~~~~~</error> * src/location.c (location_caret): Be sure to close. * tests/diagnostics.at (Line is too short, and then you die): New.	2020-03-07 10:01:52 +01:00
Akim Demaille	b82b387da9	muscles: fix incorrect decoding of $ Bug introduced in `458171e6df`. https://lists.gnu.org/archive/html/bison-patches/2013-11/msg00009.html Reported by Ahcheong Lee. https://lists.gnu.org/r/bug-bison/2020-03/msg00010.html * src/muscle-tab.c (COMMON_DECODE): "$" is coded as "$][", not "$[][". * tests/input.at ("%define" enum variables): Check that case.	2020-03-07 07:45:10 +01:00
Akim Demaille	641e326303	code: be robust to reference with invalid tags Because we want to support $<a->b>$, we must accept -> in type tags, and reject $<->$, as it is unfinished. Reported by Ahcheong Lee. * src/scan-code.l (yylex): Make sure "tag" does not end with -, since -> does not close the tag. * tests/input.at (Stray $ or @): Check this.	2020-03-06 17:29:26 +01:00
Akimn Demaille	192e9fdf77	build: fix typo * build-aux/cross-options.pl: here.	2020-03-06 08:32:26 +01:00
Akim Demaille	a4a3f08c11	doc: update recommandation for libtextstyle * README: here.	2020-03-06 08:32:18 +01:00
Akim Demaille	666df338a7	style: comment changes * src/symtab.h, src/lr0.c: here.	2020-03-06 08:32:03 +01:00
Akim Demaille	b437b16603	examples: use consistently the GFDL header for readmes * examples/c++/README.md, examples/c++/calc++/README.md, * examples/c/calc/README.md, examples/c/lexcalc/README.md, * examples/c/reccalc/README.md: Prefer the GFDL banner to the GPL one.	2020-03-06 08:31:34 +01:00
Akim Demaille	b493c173c9	style: remove useless declarations * src/reader.h: Don't duplicate what parse-gram.h already exposes. * src/lr0.h: Remove useless include.	2020-03-06 08:30:21 +01:00
Adrian VogelsgesangandAkim Demaille	aab3feb5a1	typo: succesful -> successful * data/skeletons/lalr1.cc: here * etc/bench.pl.in: here * src/location.c: and here.	2020-03-06 08:29:58 +01:00
Akim Demaille	b7942f2661	README: point to tests/bison, and document --trace Reported by Victor Morales Cayuela. * README, README-hacking.md: here.	2020-03-06 08:28:23 +01:00
Akim Demaille	cefb538ab0	gnulib: update	2020-03-06 08:25:52 +01:00
Akim Demaille	26c5f48c1c	maint: post-release administrivia * NEWS: Add header line for next release. * .prev-version: Record previous version. * cfg.mk (old_NEWS_hash): Auto-update.	2020-02-13 19:11:16 +01:00
Akim Demaille	7f921d18dd	version 3.5.2 * NEWS: Record release date.	2020-02-13 18:25:21 +01:00
Akim Demaille	cc3760ef51	news: 3.5.2 * NEWS: Update.	2020-02-13 18:25:11 +01:00
Akim Demaille	2f23ca6f65	gnulib: update	2020-02-13 08:18:12 +01:00
Akim Demaille	468b68c5cd	doc: update Doxygen template * Doxyfile.in: Run doxygen -u on it.	2020-02-13 08:18:12 +01:00
Akim Demaille	9ed802a026	java: avoid trailing white spaces * data/skeletons/java.m4 (b4_maybe_throws): Issue a space before when needed. * data/skeletons/lalr1.java: Avoid trailing spaces.	2020-02-13 08:18:12 +01:00
Akim Demaille	fb554c2804	m4: fix b4_token_format We used to emit: /** Token number,to be returned by the scanner. / static final int NUM = 258; /* Token number,to be returned by the scanner. / static final int NEG = 259; with no space after the comma. Fix that. data/skeletons/bison.m4 (b4_token_format): Quote where appropriate.	2020-02-13 08:18:11 +01:00
Akim Demaille	47850d4f58	doc: clearly state that %yacc only makes sense with yacc.c * doc/bison.texi: here.	2020-02-13 08:18:11 +01:00
Akim Demaille	57b035a242	doc: spell check * doc/bison.texi: here.	2020-02-13 08:18:11 +01:00
Akim Demaille	1587a5ea9b	examples: be more robust to spaces in paths Reported by Nikki Valen. https://lists.gnu.org/r/bug-bison/2020-01/msg00032.html * examples/test ($prog): Remove, replaced by... (prog): This new function, which pays attention to quoting shell variables.	2020-01-21 07:01:34 +01:00
Adrian VogelsgesangandAkim Demaille	4ab2cf7450	larlr1.cc: Reject unsupported values for parse.lac Just as the yacc.c skeleton, the lalr1.cc skeleton should reject invalid values for parse.lac. * data/skeletons/lalr1.cc: check validity of parse.lac * tests/input.at: new test cases	2020-01-21 06:57:21 +01:00
Akim Demaille	7e3a513d88	maint: post-release administrivia * NEWS: Add header line for next release. * .prev-version: Record previous version. * cfg.mk (old_NEWS_hash): Auto-update.	2020-01-19 14:35:50 +01:00
Akim Demaille	57f64ebbf8	version 3.5.1 * NEWS: Record release date.	2020-01-19 14:17:48 +01:00
Akim Demaille	c8d997cb5f	news: update	2020-01-19 14:10:46 +01:00
Akim Demaille	61b8a8def5	CI: use ICC again See https://github.com/nemequ/icc-travis/issues/15. Thanks to Jeff Hammond and Evan Nemerson for their help. * configure.ac (warn_common): Disable dubious warnings. * .travis.yml: Use ICC again.	2020-01-19 11:36:47 +01:00
Akim Demaille	6990c5bde9	warnings: pacify ICC in lalr1.cc See `139d065594`. * data/skeletons/yacc.c: If I might be a char, write a[+I] instead of a[I], so that ICC does not complain.	2020-01-19 11:35:26 +01:00
Jim MeyeringandAkim Demaille	27e822abfd	test: report.at: avoid tiny new failure Be robust to newer versions of Autoconf where the package URL defaults to https instead of http. * configure.ac (AC_INIT): Use https. * tests/report.at: Adjust expected output s/http/https/ to match updated URL.	2020-01-19 10:03:01 +01:00
Akim Demaille	21ba496083	git: update ignores	2020-01-19 10:02:55 +01:00
Akim Demaille	9cf0a97aa9	gnulib: update	2020-01-11 06:03:51 +01:00
Akim Demaille	3dec8a4caf	lalr1.cc: avoid static_cast Reported by donmac703. Fixes https://github.com/akimd/bison/issues/20. * data/skeletons/lalr1.cc: here.	2020-01-10 19:31:00 +01:00
Akim Demaille	2cb52c5a91	glr.c: add missing cast Reported by psjo. Fixes https://github.com/akimd/bison/issues/19. * data/skeletons/glr.c (yyprocessOneStack): Here.	2020-01-10 19:30:54 +01:00
Akim Demaille	04f3bfc596	regen	2020-01-10 19:21:35 +01:00
Akim Demaille	c67daa9a97	package: bump copyrights to 2020 Run 'make update-copyright'.	2020-01-10 19:16:23 +01:00
Akim Demaille	2ca8e86f83	gitignore: update	2020-01-10 19:16:16 +01:00
Akim Demaille	78bb152a63	tests: also check -Wchar-subscripts GCC's -Wchar-subscripts may report issues on platforms where char is unsigned. Unfortunately the current CI does not reproduce the problem. But that would allow contributors to report issues if the warning appears somewhere. See `139d065594`. Problem reported by Andy Fiddaman in: https://lists.gnu.org/r/bug-bison/2019-12/msg00021.html * configure.ac (warn_common): Add -Wchar-subscripts.	2019-12-31 12:00:02 +01:00
Akim Demaille	4d6ff4c5e5	CI: do not specify the language When we give travis the langugage, it overrides our envvars. Instead of the MATRIX_EVAL trick, just stop specifying the language.	2019-12-30 15:28:15 +01:00
Akim Demaille	9bb5087ad1	CI: remove ICC support, we can no longer use it https://github.com/nemequ/icc-travis/issues/15	2019-12-30 08:56:46 +01:00
Akim Demaille	d29e40a047	doc: clean up the description of YYDEBUG * doc/bison.texi: Make it clearer that %define parse.trace is the preferred options. Fix a typo about api.prefix.	2019-12-29 11:13:00 +01:00
Akim Demaille	b10366f296	glr.cc: avoid compiler warnings 381. types.at:366: testing glr.cc api.value.type={double} ... test.cc:207:57: error: "__clang_major__" is not defined, evaluates to 0 [-Werror=undef] 207 \| #if defined __APPLE__ && YY_CPLUSPLUS < 201103L && 4 <= __clang_major__ \| ^~~~~~~~~~~~~~~ * data/skeletons/glr.cc: Check __clang_major__ before using it.	2019-12-29 11:13:00 +01:00
Paul Eggert	139d065594	warnings: pacify ‘gcc -Wchar-subscripts’ in yacc.c Problem reported by Andy Fiddaman in: https://lists.gnu.org/r/bug-bison/2019-12/msg00021.html * data/skeletons/yacc.c (yy_reduce_print, yy_lac, yysyntax_error) (yyreturn): If I might be a char, write a[+I] instead of a[I], so that ‘gcc -Wchar-subscripts’ does not complain.	2019-12-18 13:35:28 -08:00
Akim Demaille	0d73c39bb7	doc: formatting changes * doc/bison.texi: No output changes.	2019-12-14 17:19:53 +01:00
Akim Demaille	7f01adced9	tests: don't fail if seq is no available As is the case on Solaris. Reported by Dennis Clarke. https://lists.gnu.org/archive/html/bug-bison/2019-12/msg00011.html * examples/c/reccalc/reccalc.test: Skip if there is no seq.	2019-12-14 17:19:53 +01:00
Akim Demaille	3bad20352c	maint: post-release administrivia * NEWS: Add header line for next release. * .prev-version: Record previous version. * cfg.mk (old_NEWS_hash): Auto-update.	2019-12-11 07:57:45 +01:00
@@ -1 +1 @@
 .4.92
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