news: new syntax (%gprec and %precr)

3 grammars: one typical, with normal test cases, one to display all the
warnings introduced, and one with the errors introduced.

* tests/conflicts.at: New

.gitignore

@@ -1,16 +1,7 @@
-*.eps
-*.log
-*.o
-*.pdf
-*.png
-*.stamp
-*.trs
-*~
-.deps
-.dirstamp
 /*.cache
 /*.flc
 /*.prj
+/*~
 /.tarball-version
 /.version
 /ABOUT-NLS

.prev-version

@@ -1 +1 @@
-3.0.4
+3.0

AUTHORS

@@ -24,7 +24,7 @@ and nasty bugs.
 
 -----
 
-Copyright (C) 1998-2015, 2018 Free Software Foundation, Inc.
+Copyright (C) 1998-2013 Free Software Foundation, Inc.
 
 This file is part of Bison, the GNU Compiler Compiler.
 

ChangeLog-2012

@@ -26733,8 +26733,8 @@
 
 	-----
 
-	Copyright (C) 1987-1988, 1991-2015, 2018 Free Software
+	Copyright (C) 1987-1988, 1991-2013 Free Software Foundation,
-	Foundation, Inc.
+	Inc.
 
 	Copying and distribution of this file, with or without
 	modification, are permitted provided the copyright notice and this

Makefile.am

@@ -1,6 +1,6 @@
 ## Process this file with automake to produce Makefile.in.
 
-# Copyright (C) 2001-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2001-2013 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
@@ -24,10 +24,8 @@ SUBDIRS = po runtime-po .
 aclocaldir = @aclocaldir@
 aclocal_DATA = m4/bison-i18n.m4
 
-EXTRA_DIST = .prev-version .version cfg.mk PACKAGING \
+EXTRA_DIST = .prev-version .version \
-  ChangeLog-1998 ChangeLog-2012 ChangeLog
+  cfg.mk ChangeLog-1998 ChangeLog-2012 PACKAGING
-
-dist_doc_DATA = AUTHORS COPYING NEWS README THANKS TODO
 
 ## Running the bison from this tarball.  To generate our own parser,
 ## but also to run the tests.  Of course, you ought to keep a sane
@@ -39,9 +37,8 @@ AM_YFLAGS = -d -v -Werror -Wall -Wno-yacc --report=all
 
 # Initialization before completion by local.mk's.
 AM_CFLAGS = $(WARN_CFLAGS)
-# Find builddir/src/scan-code.c etc.  For some reason "-I./lib"
+# Find builddir/src/scan-code.c etc.
-# instead of "-Ilib" avoids infinite recursions on #include_next.
+AM_CPPFLAGS = -I. -Ilib -I$(top_srcdir) -I$(top_srcdir)/lib
-AM_CPPFLAGS = -I. -I./lib -I$(top_srcdir) -I$(top_srcdir)/lib
 BUILT_SOURCES =
 CLEANFILES =
 DISTCLEANFILES =

NEWS

@@ -1,157 +1,33 @@
 GNU Bison NEWS
 
-* Noteworthy changes in release 3.0.5 (2018-05-27) [stable]
+* Noteworthy changes in release ?.? (????-??-??) [?]
 
-** Bug fixes
+** New syntax: partial-order precedence relationships
 
-*** C++: Fix support of 'syntax_error'
+  Formerly, the precedence order of tokens was linear, depending only on the
+  order in which they were declared.  With the new syntax, all the tokens are
+  not necessarily comparable.  It is possible to declare a group of tokens with
+  no links outside of the group, and to later on add only those needed.
+  The uncomparability of tokens would allow for more feedback on new conflicts
+  silently resolved via precedence.
 
-  One incorrect 'inline' resulted in linking errors about the constructor of
+  An example of the new syntax applied to arithmetic and boolean operators,
-  the syntax_error exception.
+  with '^' serving as both numerical power and boolean XOR:
 
-*** C++: Fix warnings
+  %gprec arith {
+    %left '+' '-'
+    %left '*' '/'
+  }
+  %gprec bool {
+    %left OR
+    %left AND
+  }
+  %gprec { %right '^' }
 
-  GCC 7.3 (with -O1 or -O2 but not -O0 or -O3) issued null-dereference
+  %precr '^' > arith
-  warnings about yyformat being possibly null.  It also warned about the
+  %precr OR AND > '^'
-  deprecated implicit definition of copy constructors when there's a
-  user-defined (copy) assignment operator.
 
-*** Location of errors
+  Here, AND is not comparable with '+', but '^' > '+' and AND > '^'
-
-  In C++ parsers, out-of-bounds errors can happen when a rule with an empty
-  ride-hand side raises a syntax error.  The behavior of the default parser
-  (yacc.c) in such a condition was undefined.
-
-  Now all the parsers match the behavior of glr.c: @$ is used as the
-  location of the error.  This handles gracefully rules with and without
-  rhs.
-
-*** Portability fixes in the test suite
-
-  On some platforms, some Java and/or C++ tests were failing.
-
-* Noteworthy changes in release 3.0.4 (2015-01-23) [stable]
-
-** Bug fixes
-
-*** C++ with Variants (lalr1.cc)
-
-  Fix a compiler warning when no %destructor use $$.
-
-*** Test suites
-
-  Several portability issues in tests were fixed.
-
-* Noteworthy changes in release 3.0.3 (2015-01-15) [stable]
-
-** Bug fixes
-
-*** C++ with Variants (lalr1.cc)
-
-  Problems with %destructor and '%define parse.assert' have been fixed.
-
-*** Named %union support (yacc.c, glr.c)
-
-  Bison 3.0 introduced a regression on named %union such as
-
-    %union foo { int ival; };
-
-  The possibility to use a name was introduced "for Yacc compatibility".
-  It is however not required by POSIX Yacc, and its usefulness is not clear.
-
-*** %define api.value.type union with %defines (yacc.c, glr.c)
-
-  The C parsers were broken when %defines was used together with "%define
-  api.value.type union".
-
-*** Redeclarations are reported in proper order
-
-  On
-
-    %token FOO "foo"
-    %printer {} "foo"
-    %printer {} FOO
-
-  bison used to report:
-
-    /tmp/foo.yy:2.10-11: error: %printer redeclaration for FOO
-     %printer {} "foo"
-              ^^
-    /tmp/foo.yy:3.10-11:     previous declaration
-     %printer {} FOO
-              ^^
-
-  Now, the "previous" declaration is always the first one.
-
-
-** Documentation
-
-  Bison now installs various files in its docdir (which defaults to
-  '/usr/local/share/doc/bison'), including the three fully blown examples
-  extracted from the documentation:
-
-   - rpcalc
-     Reverse Polish Calculator, a simple introductory example.
-   - mfcalc
-     Multi-function Calc, a calculator with memory and functions and located
-     error messages.
-   - calc++
-     a calculator in C++ using variant support and token constructors.
-
-* Noteworthy changes in release 3.0.2 (2013-12-05) [stable]
-
-** Bug fixes
-
-*** Generated source files when errors are reported
-
-  When warnings are issued and -Werror is set, bison would still generate
-  the source files (*.c, *.h...).  As a consequence, some runs of "make"
-  could fail the first time, but not the second (as the files were generated
-  anyway).
-
-  This is fixed: bison no longer generates this source files, but, of
-  course, still produces the various reports (*.output, *.xml, etc.).
-
-*** %empty is used in reports
-
-  Empty right-hand sides are denoted by '%empty' in all the reports (text,
-  dot, XML and formats derived from it).
-
-*** YYERROR and variants
-
-  When C++ variant support is enabled, an error triggered via YYERROR, but
-  not caught via error recovery, resulted in a double deletion.
-
-* Noteworthy changes in release 3.0.1 (2013-11-12) [stable]
-
-** Bug fixes
-
-*** Errors in caret diagnostics
-
-  On some platforms, some errors could result in endless diagnostics.
-
-*** Fixes of the -Werror option
-
-  Options such as "-Werror -Wno-error=foo" were still turning "foo"
-  diagnostics into errors instead of warnings.  This is fixed.
-
-  Actually, for consistency with GCC, "-Wno-error=foo -Werror" now also
-  leaves "foo" diagnostics as warnings.  Similarly, with "-Werror=foo
-  -Wno-error", "foo" diagnostics are now errors.
-
-*** GLR Predicates
-
-  As demonstrated in the documentation, one can now leave spaces between
-  "%?" and its "{".
-
-*** Installation
-
-  The yacc.1 man page is no longer installed if --disable-yacc was
-  specified.
-
-*** Fixes in the test suite
-
-  Bugs and portability issues.
 
 * Noteworthy changes in release 3.0 (2013-07-25) [stable]
 
@@ -2778,7 +2654,7 @@ Output file does not redefine const for C++.
 
 -----
 
-Copyright (C) 1995-2015, 2018 Free Software Foundation, Inc.
+Copyright (C) 1995-2013 Free Software Foundation, Inc.
 
 This file is part of Bison, the GNU Parser Generator.
 

PACKAGING

@@ -36,7 +36,7 @@ to the bison package.
 
 -----
 
-Copyright (C) 2002, 2005, 2009-2015, 2018 Free Software Foundation, Inc.
+Copyright (C) 2002, 2005, 2009-2013 Free Software Foundation, Inc.
 
 This file is part of Bison, the GNU Compiler Compiler.
 

README

@@ -44,7 +44,7 @@ End:
 
 -----
 
-Copyright (C) 1992, 1998-1999, 2003-2005, 2008-2015, 2018 Free Software
+Copyright (C) 1992, 1998-1999, 2003-2005, 2008-2013 Free Software
 Foundation, Inc.
 
 This file is part of Bison, the GNU Compiler Compiler.

README-alpha

@@ -12,7 +12,7 @@ the problems you encounter.
 
 -----
 
-Copyright (C) 2002, 2004, 2009-2015, 2018 Free Software Foundation, Inc.
+Copyright (C) 2002, 2004, 2009-2013 Free Software Foundation, Inc.
 
 This file is part of GNU Bison.
 

README-hacking

@@ -9,19 +9,19 @@ Everything related to the development of Bison is on Savannah:
 * Administrivia
 
 ** If you incorporate a change from somebody on the net:
-First, if it is a large change, you must make sure they have signed the
+First, if it is a large change, you must make sure they have signed
-appropriate paperwork.  Second, be sure to add their name and email address
+the appropriate paperwork.  Second, be sure to add their name and
-to THANKS.
+email address to THANKS.
 
 ** If a change fixes a test, mention the test in the commit message.
 
 ** Bug reports
-If somebody reports a new bug, mention his name in the commit message and in
+If somebody reports a new bug, mention his name in the commit message
-the test case you write.  Put him into THANKS.
+and in the test case you write.  Put him into THANKS.
 
-The correct response to most actual bugs is to write a new test case which
+The correct response to most actual bugs is to write a new test case
-demonstrates the bug.  Then fix the bug, re-run the test suite, and check
+which demonstrates the bug.  Then fix the bug, re-run the test suite,
-everything in.
+and check everything in.
 
 
 * Hacking
@@ -30,17 +30,17 @@ everything in.
 Which include serious bug fixes, must be mentioned in NEWS.
 
 ** Translations
-Only user visible strings are to be translated: error messages, bits of the
+Only user visible strings are to be translated: error messages, bits
-.output file etc.  This excludes impossible error messages (comparable to
+of the .output file etc.  This excludes impossible error messages
-assert/abort), and all the --trace output which is meant for the maintainers
+(comparable to assert/abort), and all the --trace output which is
-only.
+meant for the maintainers only.
 
 ** Horizontal tabs
 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.
+However, make files, ChangeLog, and some regular expressions require
-Also, test cases might need to contain tabs to check that Bison properly
+tabs.  Also, test cases might need to contain tabs to check that Bison
-processes tabs in its input.
+properly processes tabs in its input.
 
 
 * Working from the repository
@@ -62,22 +62,13 @@ tools we depend upon, including:
 - Gettext <http://www.gnu.org/software/gettext/>
 - Graphviz <http://www.graphviz.org>
 - Gzip <http://www.gnu.org/software/gzip/>
-- Help2man <http://www.gnu.org/software/help2man/>
 - Perl <http://www.cpan.org/>
 - Rsync <http://samba.anu.edu.au/rsync/>
 - Tar <http://www.gnu.org/software/tar/>
-- Texinfo <http://www.gnu.org/software/texinfo/>
 
 Valgrind <http://valgrind.org/> is also highly recommended, if it supports
 your architecture.
 
-If you're using a GNU/Linux distribution, the easiest way to install the
-above packages depends on your system.  The following shell command should
-work for Debian-based systems such as Ubuntu:
-
-  sudo apt-get install \
-    autoconf automake autopoint flex graphviz help2man texinfo valgrind
-
 Bison is written using Bison grammars, so there are bootstrapping issues.
 The bootstrap script attempts to discover when the C code generated from the
 grammars is out of date, and to bootstrap with an out-of-date version of the
@@ -103,19 +94,15 @@ to perform the first checkout of the submodules, run
 
        $ git submodule update --init
 
+Git submodule support is weak before versions 1.6 and later, you
+should probably upgrade Git if your version is older.
+
 The next step is to get other files needed to build, which are
 extracted from other source packages:
 
         $ ./bootstrap
 
-Bootstrapping updates the submodules to the versions registered in the
+And there you are!  Just
-top-level directory.  To change gnulib, first check out the version you want
-in `gnulib`, then commit this change in Bison's repository, and finally run
-bootstrap.
-
-If it fails with missing symbols (e.g., "error: possibly undefined macro:
-AC_PROG_GNU_M4"), you are likely to have forgotten the submodule
-initialization part.  Otherwise, there you are!  Just
 
         $ ./configure
         $ make
@@ -139,12 +126,13 @@ explicitly by the user.
 *** Updating Bison
 
 If you pull a newer version of a branch, say via "git pull", you might
-import requests for updated submodules.  A simple "git diff" will reveal if
+import requests for updated submodules.  A simple "git diff" will
-the current version of the submodule (i.e., the actual contents of the
+reveal if the current version of the submodule (i.e., the actual
-gnulib directory) and the current request from the subscriber (i.e., the
+contents of the gnulib directory) and the current request from the
-reference of the version of gnulib that the Bison repository requests)
+subscriber (i.e., the reference of the version of gnulib that the
-differ.  To upgrade the submodules (i.e., to check out the version that is
+Bison repository requests) differ.  To upgrade the submodules (i.e.,
-actually requested by the subscriber, run "git submodule update".
+to check out the version that is actually requested by the subscriber,
+run "git submodule update".
 
         $ git pull
         $ git submodule update
@@ -168,8 +156,8 @@ Register your changes.
 
         $ git checkin ...
 
-For a suggestion of what gnulib commit might be stable enough for a formal
+For a suggestion of what gnulib commit might be stable enough for a
-release, see the ChangeLog in the latest gnulib snapshot at:
+formal release, see the ChangeLog in the latest gnulib snapshot at:
 
         http://erislabs.net/ianb/projects/gnulib/
 
@@ -179,9 +167,9 @@ The Autoconf files we use are currently:
         lib/m4sugar/m4sugar.m4
         lib/m4sugar/foreach.m4
 
-These files don't change very often in Autoconf, so it should be relatively
+These files don't change very often in Autoconf, so it should be
-straight-forward to examine the differences in order to decide whether to
+relatively straight-forward to examine the differences in order to
-update.
+decide whether to update.
 
 * Test suite
 
@@ -244,99 +232,102 @@ suite.  So currently, do not try to run valgrind on Mac OS X.
 Try to run the test suite with more severe conditions before a
 release:
 
-- Configure the package with --enable-gcc-warnings, so that one checks that
+- Configure the package with --enable-gcc-warnings, so that one checks
-  1. Bison compiles cleanly, 2. the parsers it produces compile cleanly too.
+  that 1. Bison compiles cleanly, 2. the parsers it produces compile
+  cleanly too.
 
-- Maybe build with -DGNULIB_POSIXCHECK, which suggests gnulib modules that
+- Maybe build with -DGNULIB_POSIXCHECK, which suggests gnulib modules
-  can fix portability issues.  See if you really want to pay attention to
+  that can fix portability issues.  See if you really want to pay
-  its warnings; there's no need to obey blindly to it
+  attention to its warnings; there's no need to obey blindly to it
   (<http://lists.gnu.org/archive/html/bison-patches/2012-05/msg00057.html>).
 
-- Check with "make syntax-check" if there are issues diagnosed by gnulib.
+- Check with "make syntax-check" if there are issues diagnosed by
+  gnulib.
 
 - run "make maintainer-check" which:
   - runs "valgrind -q bison" to run Bison under Valgrind.
   - runs the parsers under Valgrind.
   - runs the test suite with G++ as C compiler...
 
-- run "make maintainer-push-check", which runs "make maintainer-check" while
+- run "make maintainer-push-check", which runs "make maintainer-check"
-  activating the push implementation and its pull interface wrappers in many
+  while activating the push implementation and its pull interface wrappers
-  test cases that were originally written to exercise only the pull
+  in many test cases that were originally written to exercise only the
-  implementation.  This makes certain the push implementation can perform
+  pull implementation.  This makes certain the push implementation can
-  every task the pull implementation can.
+  perform every task the pull implementation can.
 
-- run "make maintainer-xml-check", which runs "make maintainer-check" while
+- run "make maintainer-xml-check", which runs "make maintainer-check"
-  checking Bison's XML automaton report for every working grammar passed to
+  while checking Bison's XML automaton report for every working grammar
-  Bison in the test suite.  The check just diffs the output of Bison's
+  passed to Bison in the test suite.  The check just diffs the output of
-  included XSLT style sheets with the output of --report=all and --graph.
+  Bison's included XSLT style sheets with the output of --report=all and
+  --graph.
 
 - running "make maintainer-release-check" takes care of running
   maintainer-check, maintainer-push-check and maintainer-xml-check.
 
-- Change tests/atlocal/CFLAGS to add your preferred options.  For instance,
+- Change tests/atlocal/CFLAGS to add your preferred options.  For
-  "-traditional" to check that the parsers are K&R.  Note that it does not
+  instance, "-traditional" to check that the parsers are K&R.  Note
-  make sense for glr.c, which should be ANSI, but currently is actually GNU
+  that it does not make sense for glr.c, which should be ANSI, but
-  C, nor for lalr1.cc.
+  currently is actually GNU C, nor for lalr1.cc.
 
-- Test with a very recent version of GCC for both C and C++.  Testing with
+- Test with a very recent version of GCC for both C and C++.  Testing
-  older versions that are still in use is nice too.
+  with older versions that are still in use is nice too.
 
 
 * Release Procedure
-This section needs to be updated to take into account features from gnulib.
+This section needs to be updated to take into account features from
-In particular, be sure to read README-release.
+gnulib.  In particular, be sure to read README-release.
 
 ** Update the submodules.  See above.
 
 ** Update maintainer tools, such as Autoconf.  See above.
 
 ** Try to get the *.pot files to the Translation Project at least one
-week before a stable release, to give them time to translate them.  Before
+week before a stable release, to give them time to translate them.
-generating the *.pot files, make sure that po/POTFILES.in and
+Before generating the *.pot files, make sure that po/POTFILES.in and
-runtime-po/POTFILES.in list all files with translatable strings.  This
+runtime-po/POTFILES.in list all files with translatable strings.
-helps: grep -l '\<_(' *
+This helps: grep -l '\<_(' *
 
 ** Tests
 See above.
 
 ** Update the foreign files
-Running "./bootstrap" in the top level should update them all for you.  This
+Running "./bootstrap" in the top level should update them all for you.
-covers PO files too.  Sometimes a PO file contains problems that causes it
+This covers PO files too.  Sometimes a PO file contains problems that
-to be rejected by recent Gettext releases; please report these to the
+causes it to be rejected by recent Gettext releases; please report
-Translation Project.
+these to the Translation Project.
 
 ** Update README
-Make sure the information in README is current.  Most notably, make sure it
+Make sure the information in README is current.  Most notably, make sure
-recommends a version of GNU M4 that is compatible with the latest Bison
+it recommends a version of GNU M4 that is compatible with the latest
-sources.
+Bison sources.
 
 ** Check copyright years.
-We update years in copyright statements throughout Bison once at the start
+We update years in copyright statements throughout Bison once at the
-of every year by running "make update-copyright".  However, before a
+start of every year by running "make update-copyright".  However, before
-release, it's good to verify that it's actually been run.  Besides the
+a release, it's good to verify that it's actually been run.  Besides the
-copyright statement for each Bison file, check the copyright statements that
+copyright statement for each Bison file, check the copyright statements
-the skeletons insert into generated parsers, and check all occurrences of
+that the skeletons insert into generated parsers, and check all
-PACKAGE_COPYRIGHT_YEAR in configure.ac.
+occurrences of PACKAGE_COPYRIGHT_YEAR in configure.ac.
 
 ** Update NEWS, commit and tag.
-See do-release-commit-and-tag in README-release.  For a while, we used beta
+See do-release-commit-and-tag in README-release.  For a while, we used
-names such as "2.6_rc1".  Now that we use gnulib in the release procedure,
+beta names such as "2.6_rc1".  Now that we use gnulib in the release
-we must use "2.5.90", which has the additional benefit of being properly
+procedure, we must use "2.5.90", which has the additional benefit of
-sorted in "git tag -l".
+being properly sorted in "git tag -l".
 
 ** make alpha, beta, or stable
 See README-release.
 
 ** Upload
-There are two ways to upload the tarballs to the GNU servers: using gnupload
+There are two ways to upload the tarballs to the GNU servers: using
-(from gnulib), or by hand.  Obviously prefer the former.  But in either
+gnupload (from gnulib), or by hand.  Obviously prefer the former.  But
-case, be sure to read the following paragraph.
+in either case, be sure to read the following paragraph.
 
 *** Setup
 You need "gnupg".
 
-Make sure your public key has been uploaded at least to keys.gnupg.net.  You
+Make sure your public key has been uploaded at least to
-can upload it with:
+keys.gnupg.net.  You can upload it with:
 
   gpg --keyserver keys.gnupg.net --send-keys F125BDF3
 
@@ -345,8 +336,8 @@ where F125BDF3 should be replaced with your key ID.
 *** Using gnupload
 You need "ncftp".
 
-At the end "make stable" (or alpha/beta) will display the procedure to run.
+At the end "make stable" (or alpha/beta) will display the procedure to
-Just copy and paste it in your shell.
+run.  Just copy and paste it in your shell.
 
 *** By hand
 
@@ -408,9 +399,9 @@ sections that have been removed or renamed):
    $ ls -lt
 
 Remove these files and commit their removal to CVS.  For each of these
-files, add a line to the file .symlinks.  This will ensure that hyperlinks
+files, add a line to the file .symlinks.  This will ensure that
-to the removed files will redirect to the entire manual; this is better than
+hyperlinks to the removed files will redirect to the entire manual; this
-a 404 error.
+is better than a 404 error.
 
 There is a problem with 'index.html' being written twice (once for POSIX
 function 'index', once for the table of contents); you can ignore this
@@ -429,18 +420,19 @@ Complete/fix the announcement file.  The generated list of recipients
 ([email protected], [email protected], [email protected],
 [email protected], and [email protected]) is
 appropriate for a stable release or a "serious beta".  For any other
-release, drop at least [email protected].  For an example of how to fill out
+release, drop at least [email protected].  For an example of how to
-the rest of the template, search the mailing list archives for the most
+fill out the rest of the template, search the mailing list archives
-recent release announcement.
+for the most recent release announcement.
 
 For a stable release, send the same announcement on the comp.compilers
-newsgroup by sending email to [email protected].  Do not make any Cc as the
+newsgroup by sending email to [email protected].  Do not make any Cc as
-moderator will throw away anything cross-posted or Cc'ed.  It really needs
+the moderator will throw away anything cross-posted or Cc'ed.  It really
-to be a separate message.
+needs to be a separate message.
 
 ** Prepare NEWS
-So that developers don't accidentally add new items to the old NEWS entry,
+So that developers don't accidentally add new items to the old NEWS
-create a new empty entry in line 3 (without the two leading spaces):
+entry, create a new empty entry in line 3 (without the two leading
+spaces):
 
   * Noteworthy changes in release ?.? (????-??-??) [?]
 
@@ -448,7 +440,7 @@ Push these changes.
 
 -----
 
-Copyright (C) 2002-2005, 2007-2015, 2018 Free Software Foundation, Inc.
+Copyright (C) 2002-2005, 2007-2013 Free Software Foundation, Inc.
 
 This file is part of GNU Bison.
 

THANKS

@@ -1,8 +1,7 @@
 Bison was originally written by Robert Corbett.  It would not be what
 it is today without the invaluable help of these people:
 
-Aaro Koskinen             [email protected]
+Аскар Сафин              [email protected]
-Аскар Сафин               [email protected]
 Airy Andre                [email protected]
 Akim Demaille             [email protected]
 Albert Chin-A-Young       [email protected]
@@ -12,14 +11,11 @@ Andreas Schwab            [email protected]
 Andrew Suffield           [email protected]
 Angelo Borsotti           [email protected]
 Anthony Heading           [email protected]
-Antonio Silva Correia     [email protected]
 Arnold Robbins            [email protected]
 Art Haas                  [email protected]
-Askar Safin               [email protected]
 Baron Schwartz            [email protected]
 Ben Pfaff                 [email protected]
 Benoit Perrot             [email protected]
-Bernd Edlinger            [email protected]
 Bernd Kiefer              [email protected]
 Bert Deknuydt             [email protected]
 Bill Allombert            [email protected]
@@ -35,12 +31,10 @@ Cris van Pelt             [email protected]
 Csaba Raduly              [email protected]
 Dagobert Michelsen        [email protected]
 Daniel Frużyński          [email protected]
-Daniel Galloway           [email protected]
 Daniel Hagerty            [email protected]
 David J. MacKenzie        [email protected]
 David Kastrup             [email protected]
 Dennis Clarke             [email protected]
-Derek Clegg               [email protected]
 Derek M. Jones            [email protected]
 Di-an Jan                 [email protected]
 Dick Streefland           [email protected]
@@ -50,7 +44,6 @@ Enrico Scholz             [email protected]
 Eric Blake                [email protected]
 Evgeny Stambulchik        [email protected]
 Fabrice Bauzac            [email protected]
-Ferdinand Thiessen        [email protected]
 Florian Krohm             [email protected]
 Frank Heckenbach          [email protected]
 Frans Englich             [email protected]
@@ -69,13 +62,11 @@ Jim Kent                  [email protected]
 Jim Meyering              [email protected]
 Joel E. Denny             [email protected]
 Johan van Selst           [email protected]
-John Horigan              [email protected]
 Jonathan Fabrizio         [email protected]
 Jonathan Nieder           [email protected]
 Juan Manuel Guerrero      [email protected]
 Kees Zeelenberg           [email protected]
 Keith Browne              [email protected]
-Ken Moffat                [email protected]
 Laurent Mascherpa         [email protected]
 Lie Yan                   [email protected]
 Magnus Fromreide          [email protected]
@@ -87,20 +78,14 @@ Martin Mokrejs            [email protected]
 Martin Nylin              [email protected]
 Matt Kraai                [email protected]
 Matt Rosing               [email protected]
-Michael Catanzaro         [email protected]
-Michael Felt              [email protected]
 Michael Hayes             [email protected]
 Michael Raskin            [email protected]
-Michel d'Hooge            [email protected]
 Michiel De Wilde          [email protected]
 Mickael Labau             [email protected]
 Mike Castle               [email protected]
-Mike Sullivan             [email protected]
-Nate Guerin               [email protected]
 Neil Booth                [email protected]
 Nelson H. F. Beebe        [email protected]
 Nick Bowler               [email protected]
-Nicolas Bedon             [email protected]
 Nicolas Burrus            [email protected]
 Nicolas Tisserand         [email protected]
 Noah Friedman             [email protected]
@@ -108,7 +93,6 @@ Odd Arild Olsen           [email protected]
 Oleg Smolsky              [email protected]
 Oleksii Taran             [email protected]
 Paolo Bonzini             [email protected]
-Paolo Simone Gasparello   [email protected]
 Pascal Bart               [email protected]
 Paul Eggert               [email protected]
 Paul Hilfinger            [email protected]
@@ -118,19 +102,16 @@ Peter Fales               [email protected]
 Peter Hamorsky            [email protected]
 Peter Simons              [email protected]
 Petr Machata              [email protected]
-Pho                       [email protected]
 Piotr Gackiewicz          [email protected]
 Quentin Hocquet           [email protected]
 Quoc Peyrot               [email protected]
 R Blake                   [email protected]
 Raja R Harinath           [email protected]
 Ralf Wildenhues           [email protected]
-Rich Wilson               [email protected]
 Richard Stallman          [email protected]
-Rici Lake                 [email protected]
-Rob Conde                 [email protected]
 Rob Vermaas               [email protected]
 Robert Anisko             [email protected]
+Rob Conde                 [email protected]
 Roland Levillain          [email protected]
 Satya Kiran Popuri        [email protected]
 Sebastian Setzer          [email protected]
@@ -138,16 +119,13 @@ Sebastien Fricker         [email protected]
 Sergei Steshenko          [email protected]
 Shura                     [email protected]
 Stefano Lattarini         [email protected]
-Stephen Cameron           [email protected]
 Steve Murphy              [email protected]
 Sum Wu                    [email protected]
 Théophile Ranquet         [email protected]
 Thiru Ramakrishnan        [email protected]
-Thomas Jahns              [email protected]
 Tim Josling               [email protected]
 Tim Landscheidt           [email protected]
 Tim Van Holder            [email protected]
-Tobias Frost              [email protected]
 Tom Lane                  [email protected]
 Tom Tromey                [email protected]
 Tommy Nordgren            [email protected]
@@ -163,7 +141,6 @@ Wojciech Polak            [email protected]
 Wolfgang S. Kechel        [email protected]
 Wolfram Wagner            [email protected]
 Wwp                       [email protected]
-xolodho                   [email protected]
 Zack Weinberg             [email protected]
 
 Many people are not named here because we lost track of them.  We
@@ -176,7 +153,7 @@ End:
 
 -----
 
-Copyright (C) 2000-2015, 2018 Free Software Foundation, Inc.
+Copyright (C) 2000-2013 Free Software Foundation, Inc.
 
 This file is part of Bison, the GNU Parser Generator.
 

TODO

@@ -369,8 +369,7 @@ End:
 
 -----
 
-Copyright (C) 2001-2004, 2006, 2008-2015, 2018 Free Software Foundation,
+Copyright (C) 2001-2004, 2006, 2008-2013 Free Software Foundation, Inc.
-Inc.
 
 This file is part of Bison, the GNU Compiler Compiler.
 

bootstrap

@@ -1,10 +1,10 @@
 #! /bin/sh
 # Print a version string.
-scriptversion=2018-04-28.14; # UTC
+scriptversion=2013-07-03.20; # UTC
 
 # Bootstrap this package from checked-out sources.
 
-# Copyright (C) 2003-2018 Free Software Foundation, Inc.
+# Copyright (C) 2003-2013 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
@@ -17,7 +17,7 @@ scriptversion=2018-04-28.14; # UTC
 # GNU General Public License for more details.
 
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # Originally written by Paul Eggert.  The canonical version of this
 # script is maintained as build-aux/bootstrap in gnulib, however, to
@@ -42,9 +42,6 @@ export LC_ALL
 
 local_gl_dir=gl
 
-# Honor $PERL, but work even if there is none.
-PERL="${PERL-perl}"
-
 me=$0
 
 usage() {
@@ -109,6 +106,9 @@ die() { warn_ "$@"; exit 1; }
 
 # Configuration.
 
+# Name of the Makefile.am
+gnulib_mk=gnulib.mk
+
 # List of gnulib modules needed.
 gnulib_modules=
 
@@ -138,7 +138,7 @@ po_download_command_format=\
 # Fallback for downloading .po files (if rsync fails).
 po_download_command_format2=\
 "wget --mirror -nd -q -np -A.po -P '%s' \
- https://translationproject.org/latest/%s/"
+ http://translationproject.org/latest/%s/"
 
 # Prefer a non-empty tarname (4th argument of AC_INIT if given), else
 # fall back to the package name (1st argument with munging)
@@ -167,15 +167,7 @@ source_base=lib
 m4_base=m4
 doc_base=doc
 tests_base=tests
-gnulib_extra_files="
+gnulib_extra_files=''
-        build-aux/install-sh
-        build-aux/mdate-sh
-        build-aux/texinfo.tex
-        build-aux/depcomp
-        build-aux/config.guess
-        build-aux/config.sub
-        doc/INSTALL
-"
 
 # Additional gnulib-tool options to use.  Use "\newline" to break lines.
 gnulib_tool_option_extras=
@@ -217,26 +209,12 @@ bootstrap_sync=false
 # Use git to update gnulib sources
 use_git=true
 
-check_exists() {
-  if test "$1" = "--verbose"; then
-    ($2 --version </dev/null) >/dev/null 2>&1
-    if test $? -ge 126; then
-      # If not found, run with diagnostics as one may be
-      # presented with env variables to set to find the right version
-      ($2 --version </dev/null)
-    fi
-  else
-    ($1 --version </dev/null) >/dev/null 2>&1
-  fi
-
-  test $? -lt 126
-}
-
 # find_tool ENVVAR NAMES...
 # -------------------------
 # Search for a required program.  Use the value of ENVVAR, if set,
-# otherwise find the first of the NAMES that can be run.
+# otherwise find the first of the NAMES that can be run (i.e.,
-# If found, set ENVVAR to the program name, die otherwise.
+# supports --version).  If found, set ENVVAR to the program name,
+# die otherwise.
 #
 # FIXME: code duplication, see also gnu-web-doc-update.
 find_tool ()
@@ -246,21 +224,27 @@ find_tool ()
   find_tool_names=$@
   eval "find_tool_res=\$$find_tool_envvar"
   if test x"$find_tool_res" = x; then
-    for i; do
+    for i
-      if check_exists $i; then
+    do
-        find_tool_res=$i
+      if ($i --version </dev/null) >/dev/null 2>&1; then
-        break
+       find_tool_res=$i
+       break
       fi
     done
+  else
+    find_tool_error_prefix="\$$find_tool_envvar: "
   fi
-  if test x"$find_tool_res" = x; then
+  test x"$find_tool_res" != x \
-    warn_ "one of these is required: $find_tool_names;"
+    || die "one of these is required: $find_tool_names"
-    die   "alternatively set $find_tool_envvar to a compatible tool"
+  ($find_tool_res --version </dev/null) >/dev/null 2>&1 \
-  fi
+    || die "${find_tool_error_prefix}cannot run $find_tool_res --version"
   eval "$find_tool_envvar=\$find_tool_res"
   eval "export $find_tool_envvar"
 }
 
+# Find sha1sum, named gsha1sum on MacPorts, and shasum on Mac OS X 10.6.
+find_tool SHA1SUM sha1sum gsha1sum shasum
+
 # Override the default configuration, if necessary.
 # Make sure that bootstrap.conf is sourced from the current directory
 # if we were invoked as "sh bootstrap".
@@ -269,18 +253,24 @@ case "$0" in
   *) test -r "$0.conf" && . ./"$0.conf" ;;
 esac
 
+# Extra files from gnulib, which override files from other sources.
+test -z "${gnulib_extra_files}" && \
+  gnulib_extra_files="
+        build-aux/install-sh
+        build-aux/mdate-sh
+        build-aux/texinfo.tex
+        build-aux/depcomp
+        build-aux/config.guess
+        build-aux/config.sub
+        doc/INSTALL
+"
+
 if test "$vc_ignore" = auto; then
   vc_ignore=
   test -d .git && vc_ignore=.gitignore
   test -d CVS && vc_ignore="$vc_ignore .cvsignore"
 fi
 
-if test x"$gnulib_modules$gnulib_files$gnulib_extra_files" = x; then
-  use_gnulib=false
-else
-  use_gnulib=true
-fi
-
 # Translate configuration into internal form.
 
 # Parse options.
@@ -336,7 +326,7 @@ insert_if_absent() {
     die "Error: Duplicate entries in $file: " $duplicate_entries
   fi
   linesold=$(gitignore_entries $file | wc -l)
-  linesnew=$( { echo "$str"; cat $file; } | gitignore_entries | sort -u | wc -l)
+  linesnew=$(echo "$str" | gitignore_entries - $file | sort -u | wc -l)
   if [ $linesold != $linesnew ] ; then
     { echo "$str" | cat - $file > $file.bak && mv $file.bak $file; } \
       || die "insert_if_absent $file $str: failed"
@@ -417,30 +407,28 @@ sort_ver() { # sort -V is not generally available
   done
 }
 
-get_version_sed='
-# Move version to start of line.
-s/.*[v ]\([0-9]\)/\1/
-
-# Skip lines that do not start with version.
-/^[0-9]/!d
-
-# Remove characters after the version.
-s/[^.a-z0-9-].*//
-
-# The first component must be digits only.
-s/^\([0-9]*\)[a-z-].*/\1/
-
-#the following essentially does s/5.005/5.5/
-s/\.0*\([1-9]\)/.\1/g
-p
-q'
-
 get_version() {
   app=$1
 
-  $app --version >/dev/null 2>&1 || { $app --version; return 1; }
+  $app --version >/dev/null 2>&1 || return 1
 
-  $app --version 2>&1 | sed -n "$get_version_sed"
+  $app --version 2>&1 |
+  sed -n '# Move version to start of line.
+          s/.*[v ]\([0-9]\)/\1/
+
+          # Skip lines that do not start with version.
+          /^[0-9]/!d
+
+          # Remove characters after the version.
+          s/[^.a-z0-9-].*//
+
+          # The first component must be digits only.
+          s/^\([0-9]*\)[a-z-].*/\1/
+
+          #the following essentially does s/5.005/5.5/
+          s/\.0*\([1-9]\)/.\1/g
+          p
+          q'
 }
 
 check_versions() {
@@ -460,7 +448,6 @@ check_versions() {
     test "$appvar" = TAR && appvar=AMTAR
     case $appvar in
         GZIP) ;; # Do not use $GZIP:  it contains gzip options.
-        PERL::*) ;; # Keep perl modules as-is
         *) eval "app=\${$appvar-$app}" ;;
     esac
 
@@ -478,22 +465,12 @@ check_versions() {
           ret=1
           continue
         } ;;
-      # Another check is for perl modules.  These can be written as
-      # e.g. perl::XML::XPath in case of XML::XPath module, etc.
-      perl::*)
-        # Extract module name
-        app="${app#perl::}"
-        if ! $PERL -m"$app" -e 'exit 0' >/dev/null 2>&1; then
-          warn_ "Error: perl module '$app' not found"
-          ret=1
-        fi
-        continue
-        ;;
     esac
     if [ "$req_ver" = "-" ]; then
       # Merely require app to exist; not all prereq apps are well-behaved
       # so we have to rely on $? rather than get_version.
-      if ! check_exists --verbose $app; then
+      $app --version >/dev/null 2>&1
+      if [ 126 -le $? ]; then
         warn_ "Error: '$app' not found"
         ret=1
       fi
@@ -526,12 +503,6 @@ print_versions() {
   # can't depend on column -t
 }
 
-# Find sha1sum, named gsha1sum on MacPorts, shasum on Mac OS X 10.6.
-# Also find the compatible sha1 utility on the BSDs
-if test x"$SKIP_PO" = x; then
-  find_tool SHA1SUM sha1sum gsha1sum shasum sha1
-fi
-
 use_libtool=0
 # We'd like to use grep -E, to see if any of LT_INIT,
 # AC_PROG_LIBTOOL, AM_PROG_LIBTOOL is used in configure.ac,
@@ -577,21 +548,13 @@ if ! printf "$buildreq" | check_versions; then
   fi
 fi
 
-# Warn the user if autom4te appears to be broken; this causes known
-# issues with at least gettext 0.18.3.
-probe=$(echo 'm4_quote([hi])' | autom4te -l M4sugar -t 'm4_quote:$%' -)
-if test "x$probe" != xhi; then
-  warn_ "WARNING: your autom4te wrapper eats stdin;"
-  warn_ "if bootstrap fails, consider upgrading your autotools"
-fi
-
 echo "$0: Bootstrapping from checked-out $package sources..."
 
 # See if we can use gnulib's git-merge-changelog merge driver.
-if $use_git && test -d .git && check_exists git; then
+if $use_git && test -d .git && (git --version) >/dev/null 2>/dev/null ; then
   if git config merge.merge-changelog.driver >/dev/null ; then
     :
-  elif check_exists git-merge-changelog; then
+  elif (git-merge-changelog --version) >/dev/null 2>/dev/null ; then
     echo "$0: initializing git-merge-changelog driver"
     git config merge.merge-changelog.name 'GNU-style ChangeLog merge driver'
     git config merge.merge-changelog.driver 'git-merge-changelog %O %A %B'
@@ -611,87 +574,84 @@ git_modules_config () {
   test -f .gitmodules && git config --file .gitmodules "$@"
 }
 
-if $use_gnulib; then
+if $use_git; then
-  if $use_git; then
+  gnulib_path=$(git_modules_config submodule.gnulib.path)
-    gnulib_path=$(git_modules_config submodule.gnulib.path)
+  test -z "$gnulib_path" && gnulib_path=gnulib
-    test -z "$gnulib_path" && gnulib_path=gnulib
+fi
+
+# Get gnulib files.  Populate $GNULIB_SRCDIR, possibly updating a
+# submodule, for use in the rest of the script.
+
+case ${GNULIB_SRCDIR--} in
+-)
+  # Note that $use_git is necessarily true in this case.
+  if git_modules_config submodule.gnulib.url >/dev/null; then
+    echo "$0: getting gnulib files..."
+    git submodule init || exit $?
+    git submodule update || exit $?
+
+  elif [ ! -d "$gnulib_path" ]; then
+    echo "$0: getting gnulib files..."
+
+    trap cleanup_gnulib 1 2 13 15
+
+    shallow=
+    git clone -h 2>&1 | grep -- --depth > /dev/null && shallow='--depth 2'
+    git clone $shallow git://git.sv.gnu.org/gnulib "$gnulib_path" ||
+      cleanup_gnulib
+
+    trap - 1 2 13 15
   fi
-
+  GNULIB_SRCDIR=$gnulib_path
-  # Get gnulib files.  Populate $GNULIB_SRCDIR, possibly updating a
+  ;;
-  # submodule, for use in the rest of the script.
+*)
-
+  # Use GNULIB_SRCDIR directly or as a reference.
-  case ${GNULIB_SRCDIR--} in
+  if $use_git && test -d "$GNULIB_SRCDIR"/.git && \
-  -)
+        git_modules_config submodule.gnulib.url >/dev/null; then
-    # Note that $use_git is necessarily true in this case.
+    echo "$0: getting gnulib files..."
-    if git_modules_config submodule.gnulib.url >/dev/null; then
+    if git submodule -h|grep -- --reference > /dev/null; then
-      echo "$0: getting gnulib files..."
+      # Prefer the one-liner available in git 1.6.4 or newer.
-      git submodule init -- "$gnulib_path" || exit $?
+      git submodule update --init --reference "$GNULIB_SRCDIR" \
-      git submodule update -- "$gnulib_path" || exit $?
+        "$gnulib_path" || exit $?
-
+    else
-    elif [ ! -d "$gnulib_path" ]; then
+      # This fallback allows at least git 1.5.5.
-      echo "$0: getting gnulib files..."
+      if test -f "$gnulib_path"/gnulib-tool; then
-
+        # Since file already exists, assume submodule init already complete.
-      trap cleanup_gnulib 1 2 13 15
+        git submodule update || exit $?
-
+      else
-      shallow=
+        # Older git can't clone into an empty directory.
-      git clone -h 2>&1 | grep -- --depth > /dev/null && shallow='--depth 2'
+        rmdir "$gnulib_path" 2>/dev/null
-      git clone $shallow git://git.sv.gnu.org/gnulib "$gnulib_path" ||
+        git clone --reference "$GNULIB_SRCDIR" \
-        cleanup_gnulib
+          "$(git_modules_config submodule.gnulib.url)" "$gnulib_path" \
-
+          && git submodule init && git submodule update \
-      trap - 1 2 13 15
+          || exit $?
+      fi
     fi
     GNULIB_SRCDIR=$gnulib_path
-    ;;
-  *)
-    # Use GNULIB_SRCDIR directly or as a reference.
-    if $use_git && test -d "$GNULIB_SRCDIR"/.git && \
-          git_modules_config submodule.gnulib.url >/dev/null; then
-      echo "$0: getting gnulib files..."
-      if git submodule -h|grep -- --reference > /dev/null; then
-        # Prefer the one-liner available in git 1.6.4 or newer.
-        git submodule update --init --reference "$GNULIB_SRCDIR" \
-          "$gnulib_path" || exit $?
-      else
-        # This fallback allows at least git 1.5.5.
-        if test -f "$gnulib_path"/gnulib-tool; then
-          # Since file already exists, assume submodule init already complete.
-          git submodule update -- "$gnulib_path" || exit $?
-        else
-          # Older git can't clone into an empty directory.
-          rmdir "$gnulib_path" 2>/dev/null
-          git clone --reference "$GNULIB_SRCDIR" \
-            "$(git_modules_config submodule.gnulib.url)" "$gnulib_path" \
-            && git submodule init -- "$gnulib_path" \
-            && git submodule update -- "$gnulib_path" \
-            || exit $?
-        fi
-      fi
-      GNULIB_SRCDIR=$gnulib_path
-    fi
-    ;;
-  esac
-
-  # $GNULIB_SRCDIR now points to the version of gnulib to use, and
-  # we no longer need to use git or $gnulib_path below here.
-
-  if $bootstrap_sync; then
-    cmp -s "$0" "$GNULIB_SRCDIR/build-aux/bootstrap" || {
-      echo "$0: updating bootstrap and restarting..."
-      case $(sh -c 'echo "$1"' -- a) in
-        a) ignored=--;;
-        *) ignored=ignored;;
-      esac
-      exec sh -c \
-        'cp "$1" "$2" && shift && exec "${CONFIG_SHELL-/bin/sh}" "$@"' \
-        $ignored "$GNULIB_SRCDIR/build-aux/bootstrap" \
-        "$0" "$@" --no-bootstrap-sync
-    }
   fi
+  ;;
+esac
 
-  gnulib_tool=$GNULIB_SRCDIR/gnulib-tool
+# $GNULIB_SRCDIR now points to the version of gnulib to use, and
-  <$gnulib_tool || exit $?
+# we no longer need to use git or $gnulib_path below here.
+
+if $bootstrap_sync; then
+  cmp -s "$0" "$GNULIB_SRCDIR/build-aux/bootstrap" || {
+    echo "$0: updating bootstrap and restarting..."
+    case $(sh -c 'echo "$1"' -- a) in
+      a) ignored=--;;
+      *) ignored=ignored;;
+    esac
+    exec sh -c \
+      'cp "$1" "$2" && shift && exec "${CONFIG_SHELL-/bin/sh}" "$@"' \
+      $ignored "$GNULIB_SRCDIR/build-aux/bootstrap" \
+      "$0" "$@" --no-bootstrap-sync
+  }
 fi
 
+gnulib_tool=$GNULIB_SRCDIR/gnulib-tool
+<$gnulib_tool || exit $?
+
 # Get translations.
 
 download_po_files() {
@@ -700,7 +660,7 @@ download_po_files() {
   echo "$me: getting translations into $subdir for $domain..."
   cmd=$(printf "$po_download_command_format" "$domain" "$subdir")
   eval "$cmd" && return
-  # Fallback to HTTPS.
+  # Fallback to HTTP.
   cmd=$(printf "$po_download_command_format2" "$subdir" "$domain")
   eval "$cmd"
 }
@@ -732,10 +692,11 @@ update_po_files() {
     cksum_file="$ref_po_dir/$po.s1"
     if ! test -f "$cksum_file" ||
         ! test -f "$po_dir/$po.po" ||
-        ! $SHA1SUM -c "$cksum_file" < "$new_po" > /dev/null 2>&1; then
+        ! $SHA1SUM -c --status "$cksum_file" \
+            < "$new_po" > /dev/null; then
       echo "$me: updated $po_dir/$po.po..."
       cp "$new_po" "$po_dir/$po.po" \
-          && $SHA1SUM < "$new_po" > "$cksum_file" || return
+          && $SHA1SUM < "$new_po" > "$cksum_file"
     fi
   done
 }
@@ -791,9 +752,9 @@ symlink_to_dir()
       # Leave any existing symlink alone, if it already points to the source,
       # so that broken build tools that care about symlink times
       # aren't confused into doing unnecessary builds.  Conversely, if the
-      # existing symlink's timestamp is older than the source, make it afresh,
+      # existing symlink's time stamp is older than the source, make it afresh,
       # so that broken tools aren't confused into skipping needed builds.  See
-      # <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00326.html>.
+      # <http://lists.gnu.org/archive/html/bug-gnulib/2011-05/msg00326.html>.
       test -h "$dst" &&
       src_ls=$(ls -diL "$src" 2>/dev/null) && set $src_ls && src_i=$1 &&
       dst_ls=$(ls -diL "$dst" 2>/dev/null) && set $dst_ls && dst_i=$1 &&
@@ -899,33 +860,31 @@ fi
 
 # Import from gnulib.
 
-if $use_gnulib; then
+gnulib_tool_options="\
-  gnulib_tool_options="\
+ --import\
-   --no-changelog\
+ --no-changelog\
-   --aux-dir $build_aux\
+ --aux-dir $build_aux\
-   --doc-base $doc_base\
+ --doc-base $doc_base\
-   --lib $gnulib_name\
+ --lib $gnulib_name\
-   --m4-base $m4_base/\
+ --m4-base $m4_base/\
-   --source-base $source_base/\
+ --source-base $source_base/\
-   --tests-base $tests_base\
+ --tests-base $tests_base\
-   --local-dir $local_gl_dir\
+ --local-dir $local_gl_dir\
-   $gnulib_tool_option_extras\
+ $gnulib_tool_option_extras\
-  "
+"
-  if test $use_libtool = 1; then
+if test $use_libtool = 1; then
-    case "$gnulib_tool_options " in
+  case "$gnulib_tool_options " in
-      *' --libtool '*) ;;
+    *' --libtool '*) ;;
-      *) gnulib_tool_options="$gnulib_tool_options --libtool" ;;
+    *) gnulib_tool_options="$gnulib_tool_options --libtool" ;;
-    esac
+  esac
-  fi
-  echo "$0: $gnulib_tool $gnulib_tool_options --import ..."
-  $gnulib_tool $gnulib_tool_options --import $gnulib_modules \
-    || die "gnulib-tool failed"
-
-  for file in $gnulib_files; do
-    symlink_to_dir "$GNULIB_SRCDIR" $file \
-      || die "failed to symlink $file"
-  done
 fi
+echo "$0: $gnulib_tool $gnulib_tool_options --import ..."
+$gnulib_tool $gnulib_tool_options --import $gnulib_modules &&
+
+for file in $gnulib_files; do
+  symlink_to_dir "$GNULIB_SRCDIR" $file \
+    || die "failed to symlink $file"
+done
 
 bootstrap_post_import_hook \
   || die "bootstrap_post_import_hook failed"
@@ -1022,9 +981,9 @@ bootstrap_epilogue
 echo "$0: done.  Now you can run './configure'."
 
 # Local variables:
-# eval: (add-hook 'before-save-hook 'time-stamp)
+# eval: (add-hook 'write-file-hooks 'time-stamp)
 # time-stamp-start: "scriptversion="
 # time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-time-zone: "UTC0"
+# time-stamp-time-zone: "UTC"
 # time-stamp-end: "; # UTC"
 # End:

bootstrap.conf

@@ -1,6 +1,6 @@
 # Bootstrap configuration.
 
-# Copyright (C) 2006-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2006-2013 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
@@ -33,9 +33,8 @@ gnulib_modules='
   quote quotearg
   readme-release
   realloc-posix
-  spawn-pipe stdbool stpcpy strdup-posix strerror strverscmp
+  spawn-pipe stdbool stpcpy strdup-posix strerror strtoul strverscmp
-  unistd unistd-safer unlink unlocked-io
+  unistd unistd-safer unlocked-io update-copyright unsetenv verify
-  update-copyright unsetenv verify
   warnings
   xalloc
   xalloc-die
@@ -81,7 +80,7 @@ gnulib_tool_option_extras='--symlink --makefile-name=gnulib.mk'
 bootstrap_post_import_hook()
 {
   # Massage lib/gnulib.mk before using it later in the bootstrapping process.
-  build-aux/prefix-gnulib-mk --lib-name=$gnulib_name lib/gnulib.mk
+  build-aux/prefix-gnulib-mk --lib-name=$gnulib_name lib/$gnulib_mk
 
   # Ensure that ChangeLog exists, for automake.
   test -f ChangeLog || touch ChangeLog

build-aux/.gitignore

@@ -1,4 +1,6 @@
 /announce-gen
+/arg-nonnull.h
+/c++defs.h
 /compile
 /config.guess
 /config.rpath
@@ -14,12 +16,14 @@
 /install-sh
 /javacomp.sh.in
 /javaexec.sh.in
+/link-warning.h
 /mdate-sh
 /missing
-/prefix-gnulib-mk
 /test-driver
 /texinfo.tex
 /update-copyright
 /useless-if-before-free
 /vc-list-files
+/warn-on-use.h
 /ylwrap
+/prefix-gnulib-mk

build-aux/Linux.valgrind

@@ -1,48 +0,0 @@
-# Copyright (C) 2012-2015, 2018 Free Software Foundation, Inc.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-# Valgrind suppression file for Bison.
-
-# Linux prague 4.1.2-2-ARCH #1 SMP PREEMPT Wed Jul 15 08:30:32 UTC 2015
-# x86_64 GNU/Linux
-{
-   Probably exception handling from G++ 5.1.
-   Memcheck:Leak
-   match-leak-kinds: reachable
-   fun:malloc
-   fun:pool
-   fun:__static_initialization_and_destruction_0
-   fun:_GLOBAL__sub_I_eh_alloc.cc
-   fun:call_init.part.0
-   fun:_dl_init
-   obj:/usr/lib/ld-2.21.so
-}
-
-# Linux seattle 2.6.32-5-amd64 #1 SMP Thu Mar 22 17:26:33 UTC 2012
-# x86_64 GNU/Linux
-{
-   index
-   Memcheck:Cond
-   fun:index
-   fun:expand_dynamic_string_token
-   fun:_dl_map_object
-   fun:map_doit
-   fun:_dl_catch_error
-   fun:do_preload
-   fun:dl_main
-   fun:_dl_sysdep_start
-   fun:_dl_start
-   obj:/lib/ld-2.11.3.so
-}

build-aux/darwin11.4.0.valgrind

@@ -1,4 +1,4 @@
-# Copyright (C) 2012-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2012-2013 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

build-aux/git-log-fix

@@ -2,9 +2,6 @@
 # option.  It specifies what changes to make to each given SHA1's commit
 # log and metadata, using Perl-eval'able expressions.
 
-975bb564319aa4f4204c48aba265757ba207a80f
-s/Edligner/Edlinger/;
-
 0db2648930e3b6c376a539aabe368aade83ee29a
 s/--flags/--feature/;
 s/flag_flag/feature_flag/;

build-aux/linux-gnu.valgrind

@@ -0,0 +1,16 @@
+# Linux seattle 2.6.32-5-amd64 #1 SMP Thu Mar 22 17:26:33 UTC 2012
+# x86_64 GNU/Linux
+{
+   index
+   Memcheck:Cond
+   fun:index
+   fun:expand_dynamic_string_token
+   fun:_dl_map_object
+   fun:map_doit
+   fun:_dl_catch_error
+   fun:do_preload
+   fun:dl_main
+   fun:_dl_sysdep_start
+   fun:_dl_start
+   obj:/lib/ld-2.11.3.so
+}

build-aux/local.mk

@@ -1,4 +1,4 @@
-# Copyright (C) 2000-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2000-2013 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
@@ -13,10 +13,10 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-EXTRA_DIST +=					\
+EXTRA_DIST +=                                   \
-  build-aux/Darwin.valgrind			\
+  build-aux/cross-options.pl                    \
-  build-aux/Linux.valgrind			\
+  build-aux/darwin11.4.0.valgrind               \
-  build-aux/cross-options.pl			\
+  build-aux/linux-gnu.valgrind                  \
-  build-aux/move-if-change			\
+  build-aux/move-if-change                      \
-  build-aux/prev-version.txt			\
+  build-aux/prev-version.txt                    \
   build-aux/update-b4-copyright

build-aux/snippet/.gitignore

@@ -0,0 +1,4 @@
+/_Noreturn.h
+/arg-nonnull.h
+/c++defs.h
+/warn-on-use.h

build-aux/update-b4-copyright

@@ -3,7 +3,7 @@
 # Update b4_copyright invocations or b4_copyright_years definitions to
 # include the current year.
 
-# Copyright (C) 2009-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2009-2013 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

build-aux/update-package-copyright-year

@@ -2,7 +2,7 @@
 
 # In configure.ac, update PACKAGE_COPYRIGHT_YEAR to the current year.
 
-# Copyright (C) 2010-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2010-2013 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

cfg.mk

@@ -1,5 +1,5 @@
 # Customize maint.mk                           -*- makefile -*-
-# Copyright (C) 2008-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2008-2013 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
@@ -158,24 +158,23 @@ sc_space_before_open_paren:
 
 exclude = \
   $(foreach a,$(1),$(eval $(subst $$,$$$$,exclude_file_name_regexp--sc_$(a))))
-$(call exclude,                                                         \
+$(call exclude,								\
-  bindtextdomain=^lib/main.c$$                                          \
+  bindtextdomain=^lib/main.c$$						\
-  preprocessor_indentation=^data/|^lib/|^src/parse-gram.[ch]$$          \
+  preprocessor_indentation=^data/|^lib/|^src/parse-gram.[ch]$$		\
-  program_name=^lib/main.c$$                                            \
+  program_name=^lib/main.c$$						\
-  prohibit_always-defined_macros=^data/yacc.c$$|^djgpp/                 \
+  prohibit_always-defined_macros=^data/yacc.c$$|^djgpp/			\
-  prohibit_always-defined_macros+=?|^lib/timevar.c$$                    \
+  prohibit_always-defined_macros+=?|^lib/timevar.c$$			\
-  prohibit_always-defined_macros+=?|^src/(parse-gram.c|system.h)$$      \
+  prohibit_always-defined_macros+=?|^src/(parse-gram.c|system.h)$$	\
-  prohibit_always-defined_macros+=?|^tests/regression.at$$              \
+  prohibit_always-defined_macros+=?|^tests/regression.at$$		\
-  prohibit_always_true_header_tests=^djgpp/subpipe.h$$|^lib/timevar.c$$ \
+  prohibit_always_true_header_tests=^djgpp/subpipe.h$$|^lib/timevar.c$$	\
-  prohibit_always_true_header_tests+=?|^m4/timevar.m4$$                 \
+  prohibit_always_true_header_tests+=?|^m4/timevar.m4$$			\
-  prohibit_defined_have_decl_tests=?|^lib/timevar.c$$                   \
+  prohibit_defined_have_decl_tests=?|^lib/timevar.c$$			\
   prohibit_doubled_word=^tests/named-refs.at$$                          \
-  prohibit_magic_number_exit=^doc/bison.texi$$                          \
+  prohibit_magic_number_exit=^doc/bison.texi$$				\
-  prohibit_magic_number_exit+=?|^tests/(conflicts|regression).at$$      \
+  prohibit_magic_number_exit+=?|^tests/(conflicts|regression).at$$	\
-  prohibit_strcmp=^doc/bison\.texi|tests/local\.at$$                    \
+  prohibit_strcmp=^doc/bison\.texi|tests/local\.at$$			\
-  prohibit_tab_based_indentation=\.(am|mk)$$|^djgpp/|^\.git             \
+  prohibit_tab_based_indentation=\.(am|mk)$$|^djgpp/|^\.git		\
-  require_config_h_first=^(lib/yyerror|data/(glr|yacc))\.c$$            \
+  require_config_h_first=^(lib/yyerror|data/(glr|yacc))\.c$$		\
   space_before_open_paren=^(data/|djgpp/)                               \
-  two_space_separator_in_usage=^(bootstrap)                             \
+  unmarked_diagnostics=^(djgpp/|doc/bison.texi$$|tests/c\+\+\.at$$)	\
-  unmarked_diagnostics=^(djgpp/|doc/bison.texi$$|tests/c\+\+\.at$$)     \
 )

configure.ac

@@ -1,6 +1,6 @@
 # Configure template for GNU Bison.                   -*-Autoconf-*-
 #
-# Copyright (C) 2001-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2001-2013 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
@@ -26,14 +26,18 @@ m4_pattern_forbid([^gl_[A-Z]])
 AC_INIT([GNU Bison],
         m4_esyscmd([build-aux/git-version-gen .tarball-version]),
         [[email protected]])
-AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2018])
+AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2013])
 AC_DEFINE_UNQUOTED([PACKAGE_COPYRIGHT_YEAR], [$PACKAGE_COPYRIGHT_YEAR],
                    [The copyright year for this package])
 
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
 
-# We use Automake 1.14's %D% and %C%.
+# Automake 1.10.3 and 1.11.1 fix a security flaw discussed here:
+#
+#   http://thread.gmane.org/gmane.comp.sysutils.autotools.announce/131
+#
+# To avoid 1.11, we make 1.11.1 the minimum version.
 #
 # We want gnits strictness only when rolling a stable release.  For
 # release candidates, we use version strings like 2.4.3_rc1, but gnits
@@ -41,7 +45,7 @@ AC_CONFIG_MACRO_DIR([m4])
 # releases, we want to be able run make dist without being required to
 # add a bogus NEWS entry.  In that case, the version string
 # automatically contains a dash, which we also let disable gnits.
-AM_INIT_AUTOMAKE([1.14 dist-xz nostdinc
+AM_INIT_AUTOMAKE([1.11.1 dist-xz nostdinc
                  color-tests parallel-tests
                  silent-rules]
                  m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-_]],
@@ -71,18 +75,15 @@ AC_CACHE_CHECK([whether pragma GCC diagnostic push works],
   CFLAGS=$save_CFLAGS])
 
 AC_ARG_ENABLE([gcc-warnings],
-[  --enable-gcc-warnings   turn on lots of GCC warnings (not recommended).
+[  --enable-gcc-warnings   turn on lots of GCC warnings (not recommended)],
-                           Also, issue synclines from the examples/ to
-                           the corresponding source in the Texinfo doc.],
 [case $enable_gcc_warnings in
    yes|no) ;;
    *)  AC_MSG_ERROR([invalid value for --gcc-warnings: $enable_gcc_warnings]);;
  esac],
               [enable_gcc_warnings=no])
-AM_CONDITIONAL([ENABLE_GCC_WARNINGS], [test "$enable_gcc_warnings" = yes])
 if test "$enable_gcc_warnings" = yes; then
-  warn_common='-Wall -Wextra -Wno-sign-compare -Wcast-align -Wdocumentation
+  warn_common='-Wall -Wextra -Wno-sign-compare -Wcast-align
-    -Wformat -Wnull-dereference -Wpointer-arith -Wwrite-strings'
+    -Wformat -Wpointer-arith -Wwrite-strings'
   warn_c='-Wbad-function-cast -Wshadow -Wstrict-prototypes'
   warn_cxx='-Wnoexcept'
   # Warnings for the test suite only.
@@ -90,12 +91,7 @@ if test "$enable_gcc_warnings" = yes; then
   # -fno-color-diagnostics: Clang's use of colors in the error
   # messages is confusing the tests looking at the compiler's output
   # (e.g., synclines.at).
-  #
+  warn_tests='-Wundef -pedantic -Wsign-compare -fno-color-diagnostics'
-  # -Wno-keyword-macro: We use the "#define private public" dirty
-  # trick in the test suite to check some private implementation
-  # details for lalr1.cc.
-  warn_tests='-Wundef -pedantic -Wdeprecated -Wsign-compare -fno-color-diagnostics
-    -Wno-keyword-macro'
 
   AC_LANG_PUSH([C])
   # Clang supports many of GCC's -W options, but only issues warnings
@@ -165,17 +161,21 @@ AC_ARG_ENABLE([yacc],
   [AC_HELP_STRING([--disable-yacc],
      [do not build a yacc command or an -ly library])],
   , [enable_yacc=yes])
-AM_CONDITIONAL([ENABLE_YACC], [test "$enable_yacc" = yes])
+case $enable_yacc in
+yes)
+  YACC_SCRIPT=src/yacc
+  YACC_LIBRARY=lib/liby.a;;
+*)
+  YACC_SCRIPT=
+  YACC_LIBRARY=;;
+esac
+AC_SUBST([YACC_SCRIPT])
+AC_SUBST([YACC_LIBRARY])
 
 # Checks for programs.
 AM_MISSING_PROG([DOT], [dot])
 AC_PROG_LEX
-$LEX_IS_FLEX || test "X$LEX" = X: || {
+$LEX_IS_FLEX || AC_MSG_ERROR([Flex is required])
-  AC_MSG_WARN([bypassing lex because flex is required])
-  LEX=:
-}
-AM_CONDITIONAL([FLEX_CXX_WORKS],
-  [$LEX_IS_FLEX && test $bison_cv_cxx_works = yes])
 AC_PROG_YACC
 AC_PROG_RANLIB
 AC_PROG_GNU_M4
@@ -225,27 +225,23 @@ AC_CONFIG_FILES([etc/bench.pl], [chmod +x etc/bench.pl])
 AC_CONFIG_TESTDIR(tests)
 AC_CONFIG_FILES([tests/atlocal])
 AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison])
-
 AC_CHECK_PROGS([VALGRIND], [valgrind])
-# Use something simpler that $host_os to select our suppression file.
+case $VALGRIND:$host_os in
-uname=`uname`
-case $VALGRIND:$uname in
   '':*) ;;
-  *:Darwin)
+  *:darwin*)
     # See README-hacking.
+    # VALGRIND+='-q --suppressions=$(abs_top_srcdir)/build-aux/darwin11.4.0.valgrind'
     VALGRIND=;;
   *:*)
-    suppfile=build-aux/$uname.valgrind
+    suppfile=build-aux/$host_os.valgrind
     if test -f "$srcdir/$suppfile"; then
-      AC_SUBST([VALGRIND_OPTS_SUPPRESSION],
+      VALGRIND="$VALGRIND --gen-suppressions=all"
-               ["--suppressions=\$(abs_top_srcdir)/$suppfile"])
+      VALGRIND="$VALGRIND --suppressions=\$(abs_top_srcdir)/$suppfile"
     fi
+    AC_SUBST([VALGRIND_PREBISON], ["$VALGRIND -q"])
     ;;
 esac
 
-# Whether we cannot run the compiled bison.
-AM_CONDITIONAL([CROSS_COMPILING], [test "$cross_compiling" = yes])
-
 AM_MISSING_PROG([AUTOM4TE], [autom4te])
 # Needed by tests/atlocal.in.
 AC_SUBST([GCC])

data/README

@@ -52,7 +52,7 @@ into various formats.
 
 -----
 
-Copyright (C) 2002, 2008-2015, 2018 Free Software Foundation, Inc.
+Copyright (C) 2002, 2008-2013 Free Software Foundation, Inc.
 
 This file is part of GNU Bison.
 

data/bison.m4

@@ -2,7 +2,7 @@
 
 # Language-independent M4 Macros for Bison.
 
-# Copyright (C) 2002, 2004-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2004-2013 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
@@ -437,6 +437,7 @@ m4_define([b4_symbol_action_location],
 # b4_symbol_action(SYMBOL-NUM, KIND)
 # ----------------------------------
 # Run the action KIND (destructor or printer) for SYMBOL-NUM.
+# Same as in C, but using references instead of pointers.
 m4_define([b4_symbol_action],
 [b4_symbol_if([$1], [has_$2],
 [b4_dollar_pushdef([(*yyvaluep)],
@@ -1060,6 +1061,3 @@ b4_percent_define_ifdef([api.value.type],
                 [['%s' and '%s' cannot be used together]],
                 [%yacc],
                 [%define api.value.type "union"])])])])
-
-# api.value.union.name.
-b4_percent_define_check_kind([api.value.union.name], [keyword])

data/c++-skel.m4

@@ -2,8 +2,7 @@
 
 # C++ skeleton dispatching for Bison.
 
-# Copyright (C) 2006-2007, 2009-2015, 2018 Free Software Foundation,
+# Copyright (C) 2006-2007, 2009-2013 Free Software Foundation, Inc.
-# 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

data/c++.m4

@@ -2,7 +2,7 @@
 
 # C++ skeleton for Bison
 
-# Copyright (C) 2002-2018 Free Software Foundation, Inc.
+# Copyright (C) 2002-2013 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
@@ -17,11 +17,6 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-# Sanity checks, before defaults installed by c.m4.
-b4_percent_define_ifdef([[api.value.union.name]],
-  [b4_complain_at(b4_percent_define_get_loc([[api.value.union.name]]),
-                  [named %union is invalid in C++])])
-
 m4_include(b4_pkgdatadir/[c.m4])
 
 # b4_comment(TEXT, [PREFIX])
@@ -30,16 +25,6 @@ m4_include(b4_pkgdatadir/[c.m4])
 m4_define([b4_comment],
 [b4_comment_([$1], [$2// ], [$2// ])])
 
-# b4_inline(hh|cc)
-# ----------------
-# Expand to `inline\n  ` if $1 is hh.
-m4_define([b4_inline],
-[m4_case([$1],
-  [cc], [],
-  [hh], [[inline
-  ]],
-  [m4_fatal([$0: invalid argument: $1])])])
-
 ## -------- ##
 ## Checks.  ##
 ## -------- ##
@@ -184,12 +169,9 @@ m4_define([b4_public_types_declare],
     /// (External) token type, as returned by yylex.
     typedef token::yytokentype token_type;
 
-    /// Symbol type: an internal symbol number.
+    /// Internal symbol number.
     typedef int symbol_number_type;
 
-    /// The symbol type number to denote an empty symbol.
-    enum { empty_symbol = -2 };
-
     /// Internal symbol number for tokens (subsumed by symbol_number_type).
     typedef ]b4_int_type_for([b4_translate])[ token_number_type;
 
@@ -222,15 +204,8 @@ m4_define([b4_public_types_declare],
                     const semantic_type& v]b4_locations_if([,
                     const location_type& l])[);
 
-      /// Destroy the symbol.
       ~basic_symbol ();
 
-      /// Destroy contents, and record that is empty.
-      void clear ();
-
-      /// Whether empty.
-      bool empty () const;
-
       /// Destructive move, \a s is emptied into this.
       void move (basic_symbol& s);
 
@@ -260,23 +235,21 @@ m4_define([b4_public_types_declare],
       /// Constructor from (external) token numbers.
       by_type (kind_type t);
 
-      /// Record that this symbol is empty.
-      void clear ();
-
       /// Steal the symbol type from \a that.
       void move (by_type& that);
 
       /// The (internal) type number (corresponding to \a type).
-      /// \a empty when empty.
+      /// -1 when this symbol is empty.
       symbol_number_type type_get () const;
 
       /// The token.
       token_type token () const;
 
+      enum { empty = 0 };
+
       /// The symbol type.
-      /// \a empty_symbol when empty.
+      /// -1 when this symbol is empty.
-      /// An int, not token_number_type, to be able to store empty_symbol.
+      token_number_type type;
-      int type;
     };
 
     /// "External" symbols: returned by the scanner.
@@ -285,22 +258,25 @@ m4_define([b4_public_types_declare],
 ]b4_symbol_constructor_declare])
 
 
-# b4_public_types_define(hh|cc)
+# b4_public_types_define
-# -----------------------------
+# ----------------------
 # Provide the implementation needed by the public types.
 m4_define([b4_public_types_define],
-[  b4_inline([$1])b4_parser_class_name[::syntax_error::syntax_error (]b4_locations_if([const location_type& l, ])[const std::string& m)
+[[  inline
+  ]b4_parser_class_name[::syntax_error::syntax_error (]b4_locations_if([const location_type& l, ])[const std::string& m)
     : std::runtime_error (m)]b4_locations_if([
     , location (l)])[
   {}
 
   // basic_symbol.
   template <typename Base>
+  inline
   ]b4_parser_class_name[::basic_symbol<Base>::basic_symbol ()
     : value ()
   {}
 
   template <typename Base>
+  inline
   ]b4_parser_class_name[::basic_symbol<Base>::basic_symbol (const basic_symbol& other)
     : Base (other)
     , value ()]b4_locations_if([
@@ -311,7 +287,9 @@ m4_define([b4_public_types_define],
                    [value = other.value;])[
   }
 
+
   template <typename Base>
+  inline
   ]b4_parser_class_name[::basic_symbol<Base>::basic_symbol (]b4_join(
           [typename Base::kind_type t],
           [const semantic_type& v],
@@ -328,6 +306,7 @@ m4_define([b4_public_types_define],
 ]b4_type_foreach([b4_basic_symbol_constructor_define])], [[
   /// Constructor for valueless symbols.
   template <typename Base>
+  inline
   ]b4_parser_class_name[::basic_symbol<Base>::basic_symbol (]b4_join(
           [typename Base::kind_type t],
           b4_locations_if([const location_type& l]))[)
@@ -337,19 +316,11 @@ m4_define([b4_public_types_define],
   {}]])[
 
   template <typename Base>
+  inline
   ]b4_parser_class_name[::basic_symbol<Base>::~basic_symbol ()
-  {
-    clear ();
-  }
-
-  template <typename Base>
-  void
-  ]b4_parser_class_name[::basic_symbol<Base>::clear ()
   {]b4_variant_if([[
     // User destructor.
     symbol_number_type yytype = this->type_get ();
-    basic_symbol<Base>& yysym = *this;
-    (void) yysym;
     switch (yytype)
     {
 ]b4_symbol_foreach([b4_symbol_destructor])dnl
@@ -359,21 +330,14 @@ m4_define([b4_public_types_define],
 
     // Type destructor.
   ]b4_symbol_variant([[yytype]], [[value]], [[template destroy]])])[
-    Base::clear ();
-  }
-
-  template <typename Base>
-  bool
-  ]b4_parser_class_name[::basic_symbol<Base>::empty () const
-  {
-    return Base::type_get () == empty_symbol;
   }
 
   template <typename Base>
+  inline
   void
   ]b4_parser_class_name[::basic_symbol<Base>::move (basic_symbol& s)
   {
-    super_type::move (s);
+    super_type::move(s);
     ]b4_variant_if([b4_symbol_variant([this->type_get ()], [value], [move],
                                       [s.value])],
                    [value = s.value;])[]b4_locations_if([
@@ -381,38 +345,38 @@ m4_define([b4_public_types_define],
   }
 
   // by_type.
-  ]b4_inline([$1])b4_parser_class_name[::by_type::by_type ()
+  inline
-    : type (empty_symbol)
+  ]b4_parser_class_name[::by_type::by_type ()
+     : type (empty)
   {}
 
-  ]b4_inline([$1])b4_parser_class_name[::by_type::by_type (const by_type& other)
+  inline
+  ]b4_parser_class_name[::by_type::by_type (const by_type& other)
     : type (other.type)
   {}
 
-  ]b4_inline([$1])b4_parser_class_name[::by_type::by_type (token_type t)
+  inline
+  ]b4_parser_class_name[::by_type::by_type (token_type t)
     : type (yytranslate_ (t))
   {}
 
-  ]b4_inline([$1])[void
+  inline
-  ]b4_parser_class_name[::by_type::clear ()
+  void
-  {
-    type = empty_symbol;
-  }
-
-  ]b4_inline([$1])[void
   ]b4_parser_class_name[::by_type::move (by_type& that)
   {
     type = that.type;
-    that.clear ();
+    that.type = empty;
   }
 
-  ]b4_inline([$1])[int
+  inline
+  int
   ]b4_parser_class_name[::by_type::type_get () const
   {
     return type;
   }
 ]b4_token_ctor_if([[
-  ]b4_inline([$1])b4_parser_class_name[::token_type
+  inline
+  ]b4_parser_class_name[::token_type
   ]b4_parser_class_name[::by_type::token () const
   {
     // YYTOKNUM[NUM] -- (External) token number corresponding to the
@@ -438,13 +402,14 @@ m4_define([b4_symbol_constructor_declare], [])
 m4_define([b4_symbol_constructor_define], [])
 
 
-# b4_yytranslate_define(cc|hh)
+# b4_yytranslate_define
-# ----------------------------
+# ---------------------
-# Define yytranslate_.  Sometimes used in the header file ($1=hh),
+# Define yytranslate_.  Sometimes used in the header file,
 # sometimes in the cc file.
 m4_define([b4_yytranslate_define],
 [[  // Symbol number corresponding to token number t.
-  ]b4_inline([$1])b4_parser_class_name[::token_number_type
+  inline
+  ]b4_parser_class_name[::token_number_type
   ]b4_parser_class_name[::yytranslate_ (]b4_token_ctor_if([token_type],
                                                           [int])[ t)
   {
@@ -454,12 +419,12 @@ m4_define([b4_yytranslate_define],
     {
 ]b4_translate[
     };
-    const unsigned user_token_number_max_ = ]b4_user_token_number_max[;
+    const unsigned int user_token_number_max_ = ]b4_user_token_number_max[;
     const token_number_type undef_token_ = ]b4_undef_token_number[;
 
-    if (static_cast<int> (t) <= yyeof_)
+    if (static_cast<int>(t) <= yyeof_)
       return yyeof_;
-    else if (static_cast<unsigned> (t) <= user_token_number_max_)
+    else if (static_cast<unsigned int> (t) <= user_token_number_max_)
       return translate_table[t];
     else
       return undef_token_;

data/c-like.m4

@@ -2,7 +2,7 @@
 
 # Common code for C-like languages (C, C++, Java, etc.)
 
-# Copyright (C) 2012-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2012-2013 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

data/c-skel.m4

@@ -2,8 +2,7 @@
 
 # C skeleton dispatching for Bison.
 
-# Copyright (C) 2006-2007, 2009-2015, 2018 Free Software Foundation,
+# Copyright (C) 2006-2007, 2009-2013 Free Software Foundation, Inc.
-# 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

data/c.m4

@@ -2,7 +2,7 @@
 
 # C M4 Macros for Bison.
 
-# Copyright (C) 2002, 2004-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2004-2013 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
@@ -97,8 +97,7 @@ m4_define([b4_api_PREFIX],
 m4_define_default([b4_prefix], [b4_api_prefix])
 
 # If the %union is not named, its name is YYSTYPE.
-b4_percent_define_default([[api.value.union.name]],
+m4_define_default([b4_union_name], [b4_api_PREFIX[]STYPE])
-                          [b4_api_PREFIX[][STYPE]])
 
 
 ## ------------------------ ##
@@ -206,32 +205,13 @@ m4_define([b4_table_value_equals],
 
 # b4_attribute_define
 # -------------------
-# Provide portable compiler "attributes".
+# Provide portability for __attribute__.
 m4_define([b4_attribute_define],
-[#ifndef YY_ATTRIBUTE
+[#ifndef __attribute__
-# if (defined __GNUC__                                               \
+/* This feature is available in gcc versions 2.5 and later.  */
-      && (2 < __GNUC__ || (__GNUC__ == 2 && 96 <= __GNUC_MINOR__)))  \
+# if (! defined __GNUC__ || __GNUC__ < 2 \
-     || defined __SUNPRO_C && 0x5110 <= __SUNPRO_C
+      || (__GNUC__ == 2 && __GNUC_MINOR__ < 5))
-#  define YY_ATTRIBUTE(Spec) __attribute__(Spec)
+#  define __attribute__(Spec) /* empty */
-# else
-#  define YY_ATTRIBUTE(Spec) /* empty */
-# endif
-#endif
-
-#ifndef YY_ATTRIBUTE_PURE
-# define YY_ATTRIBUTE_PURE   YY_ATTRIBUTE ((__pure__))
-#endif
-
-#ifndef YY_ATTRIBUTE_UNUSED
-# define YY_ATTRIBUTE_UNUSED YY_ATTRIBUTE ((__unused__))
-#endif
-
-#if !defined _Noreturn \
-     && (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112)
-# if defined _MSC_VER && 1200 <= _MSC_VER
-#  define _Noreturn __declspec (noreturn)
-# else
-#  define _Noreturn YY_ATTRIBUTE ((__noreturn__))
 # endif
 #endif
 
@@ -270,14 +250,14 @@ m4_define([b4_attribute_define],
 
 # b4_null_define
 # --------------
-# Portability issues: define a YY_NULLPTR appropriate for the current
+# Portability issues: define a YY_NULL appropriate for the current
 # language (C, C++98, or C++11).
 m4_define([b4_null_define],
-[# ifndef YY_NULLPTR
+[# ifndef YY_NULL
 #  if defined __cplusplus && 201103L <= __cplusplus
-#   define YY_NULLPTR nullptr
+#   define YY_NULL nullptr
 #  else
-#   define YY_NULLPTR 0
+#   define YY_NULL 0
 #  endif
 # endif[]dnl
 ])
@@ -286,7 +266,7 @@ m4_define([b4_null_define],
 # b4_null
 # -------
 # Return a null pointer constant.
-m4_define([b4_null], [YY_NULLPTR])
+m4_define([b4_null], [YY_NULL])
 
 # b4_integral_parser_table_define(TABLE-NAME, CONTENT, COMMENT)
 # -------------------------------------------------------------
@@ -561,15 +541,15 @@ b4_locations_if([, yylocationp])[]b4_user_args[);
 # b4_symbol_type_register(SYMBOL-NUM)
 # -----------------------------------
 # Symbol SYMBOL-NUM has a type (for variant) instead of a type-tag.
-# Extend the definition of %union's body (b4_union_members) with a
+# Extend the definition of %union's body with a field of that type,
-# field of that type, and extend the symbol's "type" field to point to
+# and extend the symbol's "type" field to point to the field name,
-# the field name, instead of the type name.
+# instead of the type name.
 m4_define([b4_symbol_type_register],
 [m4_define([b4_symbol($1, type_tag)],
            [b4_symbol_if([$1], [has_id],
                          [b4_symbol([$1], [id])],
                          [yytype_[]b4_symbol([$1], [number])])])dnl
-m4_append([b4_union_members],
+m4_append([b4_user_union_members],
 m4_expand([
   b4_symbol_tag_comment([$1])dnl
   b4_symbol([$1], [type]) b4_symbol([$1], [type_tag]);]))
@@ -609,9 +589,10 @@ m4_copy_force([b4_symbol_value_union], [b4_symbol_value])
 ])
 
 
-# -------------------------- #
+# ---------------- #
-# api.value.type = variant.  #
+# api.value.type.  #
-# -------------------------- #
+# ---------------- #
+
 
 # b4_value_type_setup_variant
 # ---------------------------
@@ -686,13 +667,11 @@ typedef ]b4_percent_define_get([[api.value.type]])[ ]b4_api_PREFIX[STYPE;
 [m4_bmatch(b4_percent_define_get([[api.value.type]]),
 [union\|union-directive],
 [[#if ! defined ]b4_api_PREFIX[STYPE && ! defined ]b4_api_PREFIX[STYPE_IS_DECLARED
-]b4_percent_define_get_syncline([[api.value.union.name]])[
+typedef union ]b4_union_name[ ]b4_api_PREFIX[STYPE;
-union ]b4_percent_define_get([[api.value.union.name]])[
+union ]b4_union_name[
 {
 ]b4_user_union_members[
 };
-]b4_percent_define_get_syncline([[api.value.union.name]])[
-typedef union ]b4_percent_define_get([[api.value.union.name]])[ ]b4_api_PREFIX[STYPE;
 # define ]b4_api_PREFIX[STYPE_IS_TRIVIAL 1
 # define ]b4_api_PREFIX[STYPE_IS_DECLARED 1
 #endif
@@ -804,7 +783,7 @@ m4_define([b4_yy_location_print_define],
 
 /* Print *YYLOCP on YYO.  Private, do not rely on its existence. */
 
-YY_ATTRIBUTE_UNUSED
+__attribute__((__unused__))
 ]b4_function_define([yy_location_print_],
     [static unsigned],
                [[FILE *yyo],                    [yyo]],

data/glr.c

@@ -2,7 +2,7 @@
 
 # GLR skeleton for Bison
 
-# Copyright (C) 2002-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2002-2013 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
@@ -178,42 +178,9 @@ m4_if(b4_skeleton, ["glr.c"],
 ## Output files.  ##
 ## -------------- ##
 
-# Unfortunately the order of generation between the header and the
-# implementation file matters (for glr.c) because of the current
-# implementation of api.value.type=union.  In that case we still use a
-# union for YYSTYPE, but we generate the contents of this union when
-# setting up YYSTYPE.  This is needed for other aspects, such as
-# defining yy_symbol_value_print, since we need to now the name of the
-# members of this union.
-#
-# To avoid this issue, just generate the header before the
-# implementation file.  But we should also make them more independant.
-
-# ----------------- #
-# The header file.  #
-# ----------------- #
-
-# glr.cc produces its own header.
-m4_if(b4_skeleton, ["glr.c"],
-[b4_defines_if(
-[b4_output_begin([b4_spec_defines_file])
-b4_copyright([Skeleton interface for Bison GLR parsers in C],
-             [2002-2015, 2018])[
-
-]b4_cpp_guard_open([b4_spec_defines_file])[
-]b4_shared_declarations[
-]b4_cpp_guard_close([b4_spec_defines_file])[
-]b4_output_end()
-])])
-
-
-# ------------------------- #
-# The implementation file.  #
-# ------------------------- #
-
 b4_output_begin([b4_parser_file_name])
 b4_copyright([Skeleton implementation for Bison GLR parsers in C],
-             [2002-2015, 2018])[
+             [2002-2013])[
 
 /* C GLR parser skeleton written by Paul Hilfinger.  */
 
@@ -478,9 +445,9 @@ int yydebug;
 
 struct yyGLRStack;
 static void yypstack (struct yyGLRStack* yystackp, size_t yyk)
-  YY_ATTRIBUTE_UNUSED;
+  __attribute__ ((__unused__));
 static void yypdumpstack (struct yyGLRStack* yystackp)
-  YY_ATTRIBUTE_UNUSED;
+  __attribute__ ((__unused__));
 
 #else /* !]b4_api_PREFIX[DEBUG */
 
@@ -702,15 +669,19 @@ struct yyGLRStack {
 static void yyexpandGLRStack (yyGLRStack* yystackp);
 #endif
 
-static _Noreturn void
+static void yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg)
+  __attribute__ ((__noreturn__));
+static void
 yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg)
 {
-  if (yymsg != YY_NULLPTR)
+  if (yymsg != YY_NULL)
     yyerror (]b4_yyerror_args[yymsg);
   YYLONGJMP (yystackp->yyexception_buffer, 1);
 }
 
-static _Noreturn void
+static void yyMemoryExhausted (yyGLRStack* yystackp)
+  __attribute__ ((__noreturn__));
+static void
 yyMemoryExhausted (yyGLRStack* yystackp)
 {
   YYLONGJMP (yystackp->yyexception_buffer, 2);
@@ -731,7 +702,7 @@ yytokenName (yySymbol yytoken)
 /** Fill in YYVSP[YYLOW1 .. YYLOW0-1] from the chain of states starting
  *  at YYVSP[YYLOW0].yystate.yypred.  Leaves YYVSP[YYLOW1].yystate.yypred
  *  containing the pointer to the next state in the chain.  */
-static void yyfillin (yyGLRStackItem *, int, int) YY_ATTRIBUTE_UNUSED;
+static void yyfillin (yyGLRStackItem *, int, int) __attribute__ ((__unused__));
 static void
 yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)
 {
@@ -748,7 +719,7 @@ yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)
       else
         /* The effect of using yysval or yyloc (in an immediate rule) is
          * undefined.  */
-        yyvsp[i].yystate.yysemantics.yyfirstVal = YY_NULLPTR;]b4_locations_if([[
+        yyvsp[i].yystate.yysemantics.yyfirstVal = YY_NULL;]b4_locations_if([[
       yyvsp[i].yystate.yyloc = s->yyloc;]])[
       s = yyvsp[i].yystate.yypred = s->yypred;
     }
@@ -758,7 +729,7 @@ yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)
  * YYVSP[YYLOW1 .. *YYLOW-1] as in yyfillin and set *YYLOW = YYLOW1.
  * For convenience, always return YYLOW1.  */
 static inline int yyfill (yyGLRStackItem *, int *, int, yybool)
-     YY_ATTRIBUTE_UNUSED;
+     __attribute__ ((__unused__));
 static inline int
 yyfill (yyGLRStackItem *yyvsp, int *yylow, int yylow1, yybool yynormal)
 {
@@ -780,7 +751,8 @@ yyuserAction (yyRuleNum yyn, size_t yyrhslen, yyGLRStackItem* yyvsp,
               yyGLRStack* yystackp,
               YYSTYPE* yyvalp]b4_locuser_formals[)
 {
-  yybool yynormal YY_ATTRIBUTE_UNUSED = (yystackp->yysplitPoint == YY_NULLPTR);
+  yybool yynormal __attribute__ ((__unused__)) =
+    (yystackp->yysplitPoint == YY_NULL);
   int yylow;
 ]b4_parse_param_use([yyvalp], [yylocp])dnl
 [  YYUSE (yyrhslen);
@@ -808,7 +780,6 @@ yyuserAction (yyRuleNum yyn, size_t yyrhslen, yyGLRStackItem* yyvsp,
     *yyvalp = yyval_default;
   else
     *yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval;]b4_locations_if([[
-  /* Default location. */
   YYLLOC_DEFAULT ((*yylocp), (yyvsp - yyrhslen), yyrhslen);
   yystackp->yyerror_range[1].yystate.yyloc = *yylocp;
 ]])[
@@ -865,10 +836,12 @@ yydestroyGLRState (char const *yymsg, yyGLRState *yys]b4_user_formals[)
       if (yydebug)
         {
           if (yys->yysemantics.yyfirstVal)
-            YYFPRINTF (stderr, "%s unresolved", yymsg);
+            YYFPRINTF (stderr, "%s unresolved ", yymsg);
           else
-            YYFPRINTF (stderr, "%s incomplete", yymsg);
+            YYFPRINTF (stderr, "%s incomplete ", yymsg);
-          YY_SYMBOL_PRINT ("", yystos[yys->yylrState], YY_NULLPTR, &yys->yyloc);
+          yy_symbol_print (stderr, yystos[yys->yylrState],
+                           YY_NULL]b4_locuser_args([&yys->yyloc])[);
+          YYFPRINTF (stderr, "\n");
         }
 #endif
 
@@ -944,18 +917,14 @@ yygetLRActions (yyStateNum yystate, int yytoken,
     }
 }
 
-/** Compute post-reduction state.
- * \param yystate   the current state
- * \param yysym     the nonterminal to push on the stack
- */
 static inline yyStateNum
-yyLRgotoState (yyStateNum yystate, yySymbol yysym)
+yyLRgotoState (yyStateNum yystate, yySymbol yylhs)
 {
-  int yyr = yypgoto[yysym - YYNTOKENS] + yystate;
+  int yyr = yypgoto[yylhs - YYNTOKENS] + yystate;
   if (0 <= yyr && yyr <= YYLAST && yycheck[yyr] == yystate)
     return yytable[yyr];
   else
-    return yydefgoto[yysym - YYNTOKENS];
+    return yydefgoto[yylhs - YYNTOKENS];
 }
 
 static inline yybool
@@ -997,7 +966,6 @@ yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate,
 {
   yySemanticOption* yynewOption =
     &yynewGLRStackItem (yystackp, yyfalse)->yyoption;
-  YYASSERT (!yynewOption->yyisState);
   yynewOption->yystate = yyrhs;
   yynewOption->yyrule = yyrule;
   if (yystackp->yytops.yylookaheadNeeds[yyk])
@@ -1025,7 +993,7 @@ yyinitStateSet (yyGLRStateSet* yyset)
   yyset->yystates = (yyGLRState**) YYMALLOC (16 * sizeof yyset->yystates[0]);
   if (! yyset->yystates)
     return yyfalse;
-  yyset->yystates[0] = YY_NULLPTR;
+  yyset->yystates[0] = YY_NULL;
   yyset->yylookaheadNeeds =
     (yybool*) YYMALLOC (16 * sizeof yyset->yylookaheadNeeds[0]);
   if (! yyset->yylookaheadNeeds)
@@ -1055,8 +1023,8 @@ yyinitGLRStack (yyGLRStack* yystackp, size_t yysize)
   if (!yystackp->yyitems)
     return yyfalse;
   yystackp->yynextFree = yystackp->yyitems;
-  yystackp->yysplitPoint = YY_NULLPTR;
+  yystackp->yysplitPoint = YY_NULL;
-  yystackp->yylastDeleted = YY_NULLPTR;
+  yystackp->yylastDeleted = YY_NULL;
   return yyinitStateSet (&yystackp->yytops);
 }
 
@@ -1095,10 +1063,10 @@ yyexpandGLRStack (yyGLRStack* yystackp)
         {
           yyGLRState* yys0 = &yyp0->yystate;
           yyGLRState* yys1 = &yyp1->yystate;
-          if (yys0->yypred != YY_NULLPTR)
+          if (yys0->yypred != YY_NULL)
             yys1->yypred =
               YYRELOC (yyp0, yyp1, yys0->yypred, yystate);
-          if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != YY_NULLPTR)
+          if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != YY_NULL)
             yys1->yysemantics.yyfirstVal =
               YYRELOC (yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption);
         }
@@ -1106,18 +1074,18 @@ yyexpandGLRStack (yyGLRStack* yystackp)
         {
           yySemanticOption* yyv0 = &yyp0->yyoption;
           yySemanticOption* yyv1 = &yyp1->yyoption;
-          if (yyv0->yystate != YY_NULLPTR)
+          if (yyv0->yystate != YY_NULL)
             yyv1->yystate = YYRELOC (yyp0, yyp1, yyv0->yystate, yystate);
-          if (yyv0->yynext != YY_NULLPTR)
+          if (yyv0->yynext != YY_NULL)
             yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption);
         }
     }
-  if (yystackp->yysplitPoint != YY_NULLPTR)
+  if (yystackp->yysplitPoint != YY_NULL)
     yystackp->yysplitPoint = YYRELOC (yystackp->yyitems, yynewItems,
-                                      yystackp->yysplitPoint, yystate);
+                                 yystackp->yysplitPoint, yystate);
 
   for (yyn = 0; yyn < yystackp->yytops.yysize; yyn += 1)
-    if (yystackp->yytops.yystates[yyn] != YY_NULLPTR)
+    if (yystackp->yytops.yystates[yyn] != YY_NULL)
       yystackp->yytops.yystates[yyn] =
         YYRELOC (yystackp->yyitems, yynewItems,
                  yystackp->yytops.yystates[yyn], yystate);
@@ -1141,7 +1109,7 @@ yyfreeGLRStack (yyGLRStack* yystackp)
 static inline void
 yyupdateSplit (yyGLRStack* yystackp, yyGLRState* yys)
 {
-  if (yystackp->yysplitPoint != YY_NULLPTR && yystackp->yysplitPoint > yys)
+  if (yystackp->yysplitPoint != YY_NULL && yystackp->yysplitPoint > yys)
     yystackp->yysplitPoint = yys;
 }
 
@@ -1149,9 +1117,9 @@ yyupdateSplit (yyGLRStack* yystackp, yyGLRState* yys)
 static inline void
 yymarkStackDeleted (yyGLRStack* yystackp, size_t yyk)
 {
-  if (yystackp->yytops.yystates[yyk] != YY_NULLPTR)
+  if (yystackp->yytops.yystates[yyk] != YY_NULL)
     yystackp->yylastDeleted = yystackp->yytops.yystates[yyk];
-  yystackp->yytops.yystates[yyk] = YY_NULLPTR;
+  yystackp->yytops.yystates[yyk] = YY_NULL;
 }
 
 /** Undelete the last stack in *YYSTACKP that was marked as deleted.  Can
@@ -1160,12 +1128,12 @@ yymarkStackDeleted (yyGLRStack* yystackp, size_t yyk)
 static void
 yyundeleteLastStack (yyGLRStack* yystackp)
 {
-  if (yystackp->yylastDeleted == YY_NULLPTR || yystackp->yytops.yysize != 0)
+  if (yystackp->yylastDeleted == YY_NULL || yystackp->yytops.yysize != 0)
     return;
   yystackp->yytops.yystates[0] = yystackp->yylastDeleted;
   yystackp->yytops.yysize = 1;
   YYDPRINTF ((stderr, "Restoring last deleted stack as stack #0.\n"));
-  yystackp->yylastDeleted = YY_NULLPTR;
+  yystackp->yylastDeleted = YY_NULL;
 }
 
 static inline void
@@ -1175,7 +1143,7 @@ yyremoveDeletes (yyGLRStack* yystackp)
   yyi = yyj = 0;
   while (yyj < yystackp->yytops.yysize)
     {
-      if (yystackp->yytops.yystates[yyi] == YY_NULLPTR)
+      if (yystackp->yytops.yystates[yyi] == YY_NULL)
         {
           if (yyi == yyj)
             {
@@ -1233,13 +1201,12 @@ yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
                  size_t yyposn, yyGLRState* yyrhs, yyRuleNum yyrule)
 {
   yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate;
-  YYASSERT (yynewState->yyisState);
 
   yynewState->yylrState = yylrState;
   yynewState->yyposn = yyposn;
   yynewState->yyresolved = yyfalse;
   yynewState->yypred = yystackp->yytops.yystates[yyk];
-  yynewState->yysemantics.yyfirstVal = YY_NULLPTR;
+  yynewState->yysemantics.yyfirstVal = YY_NULL;
   yystackp->yytops.yystates[yyk] = yynewState;
 
   /* Invokes YY_RESERVE_GLRSTACK.  */
@@ -1299,7 +1266,7 @@ yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
 {
   int yynrhs = yyrhsLength (yyrule);
 
-  if (yystackp->yysplitPoint == YY_NULLPTR)
+  if (yystackp->yysplitPoint == YY_NULL)
     {
       /* Standard special case: single stack.  */
       yyGLRStackItem* yyrhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];
@@ -1351,13 +1318,14 @@ yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
 {
   size_t yyposn = yystackp->yytops.yystates[yyk]->yyposn;
 
-  if (yyforceEval || yystackp->yysplitPoint == YY_NULLPTR)
+  if (yyforceEval || yystackp->yysplitPoint == YY_NULL)
     {
-      YYSTYPE yysval;]b4_locations_if([[
+      YYRESULTTAG yyflag;
-      YYLTYPE yyloc;]])[
+      YYSTYPE yysval;]b4_locations_if([
+      YYLTYPE yyloc;])[
 
-      YYRESULTTAG yyflag = yydoAction (yystackp, yyk, yyrule, &yysval]b4_locuser_args([&yyloc])[);
+      yyflag = yydoAction (yystackp, yyk, yyrule, &yysval]b4_locuser_args([&yyloc])[);
-      if (yyflag == yyerr && yystackp->yysplitPoint != YY_NULLPTR)
+      if (yyflag == yyerr && yystackp->yysplitPoint != YY_NULL)
         {
           YYDPRINTF ((stderr, "Parse on stack %lu rejected by rule #%d.\n",
                      (unsigned long int) yyk, yyrule - 1));
@@ -1390,7 +1358,7 @@ yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
                   "Now in state %d.\n",
                   (unsigned long int) yyk, yyrule - 1, yynewLRState));
       for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)
-        if (yyi != yyk && yystackp->yytops.yystates[yyi] != YY_NULLPTR)
+        if (yyi != yyk && yystackp->yytops.yystates[yyi] != YY_NULL)
           {
             yyGLRState *yysplit = yystackp->yysplitPoint;
             yyGLRState *yyp = yystackp->yytops.yystates[yyi];
@@ -1417,7 +1385,7 @@ yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
 static size_t
 yysplitStack (yyGLRStack* yystackp, size_t yyk)
 {
-  if (yystackp->yysplitPoint == YY_NULLPTR)
+  if (yystackp->yysplitPoint == YY_NULL)
     {
       YYASSERT (yyk == 0);
       yystackp->yysplitPoint = yystackp->yytops.yystates[yyk];
@@ -1427,7 +1395,7 @@ yysplitStack (yyGLRStack* yystackp, size_t yyk)
       yyGLRState** yynewStates;
       yybool* yynewLookaheadNeeds;
 
-      yynewStates = YY_NULLPTR;
+      yynewStates = YY_NULL;
 
       if (yystackp->yytops.yycapacity
           > (YYSIZEMAX / (2 * sizeof yynewStates[0])))
@@ -1438,7 +1406,7 @@ yysplitStack (yyGLRStack* yystackp, size_t yyk)
         (yyGLRState**) YYREALLOC (yystackp->yytops.yystates,
                                   (yystackp->yytops.yycapacity
                                    * sizeof yynewStates[0]));
-      if (yynewStates == YY_NULLPTR)
+      if (yynewStates == YY_NULL)
         yyMemoryExhausted (yystackp);
       yystackp->yytops.yystates = yynewStates;
 
@@ -1446,7 +1414,7 @@ yysplitStack (yyGLRStack* yystackp, size_t yyk)
         (yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds,
                              (yystackp->yytops.yycapacity
                               * sizeof yynewLookaheadNeeds[0]));
-      if (yynewLookaheadNeeds == YY_NULLPTR)
+      if (yynewLookaheadNeeds == YY_NULL)
         yyMemoryExhausted (yystackp);
       yystackp->yytops.yylookaheadNeeds = yynewLookaheadNeeds;
     }
@@ -1510,9 +1478,9 @@ yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
           yySemanticOption* yyz1 = yys1->yysemantics.yyfirstVal;
           while (yytrue)
             {
-              if (yyz1 == *yyz0p || yyz1 == YY_NULLPTR)
+              if (yyz1 == *yyz0p || yyz1 == YY_NULL)
                 break;
-              else if (*yyz0p == YY_NULLPTR)
+              else if (*yyz0p == YY_NULL)
                 {
                   *yyz0p = yyz1;
                   break;
@@ -1633,7 +1601,7 @@ yyreportTree (yySemanticOption* yyx, int yyindent)
 
   for (yyi = yynrhs, yys = yyx->yystate; 0 < yyi; yyi -= 1, yys = yys->yypred)
     yystates[yyi] = yys;
-  if (yys == YY_NULLPTR)
+  if (yys == YY_NULL)
     {
       yyleftmost_state.yyposn = 0;
       yystates[0] = &yyleftmost_state;
@@ -1704,7 +1672,7 @@ yyresolveLocations (yyGLRState* yys1, int yyn1,
           yyGLRStackItem yyrhsloc[1 + YYMAXRHS];
           int yynrhs;
           yySemanticOption *yyoption = yys1->yysemantics.yyfirstVal;
-          YYASSERT (yyoption != YY_NULLPTR);
+          YYASSERT (yyoption != YY_NULL);
           yynrhs = yyrhsLength (yyoption->yyrule);
           if (yynrhs > 0)
             {
@@ -1763,7 +1731,7 @@ yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)
   YYRESULTTAG yyflag;]b4_locations_if([
   YYLTYPE *yylocp = &yys->yyloc;])[
 
-  for (yypp = &yyoptionList->yynext; *yypp != YY_NULLPTR; )
+  for (yypp = &yyoptionList->yynext; *yypp != YY_NULL; )
     {
       yySemanticOption* yyp = *yypp;
 
@@ -1805,7 +1773,7 @@ yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)
       int yyprec = yydprec[yybest->yyrule];
       yyflag = yyresolveAction (yybest, yystackp, &yysval]b4_locuser_args[);
       if (yyflag == yyok)
-        for (yyp = yybest->yynext; yyp != YY_NULLPTR; yyp = yyp->yynext)
+        for (yyp = yybest->yynext; yyp != YY_NULL; yyp = yyp->yynext)
           {
             if (yyprec == yydprec[yyp->yyrule])
               {
@@ -1832,14 +1800,14 @@ yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)
       yys->yysemantics.yysval = yysval;
     }
   else
-    yys->yysemantics.yyfirstVal = YY_NULLPTR;
+    yys->yysemantics.yyfirstVal = YY_NULL;
   return yyflag;
 }
 
 static YYRESULTTAG
 yyresolveStack (yyGLRStack* yystackp]b4_user_formals[)
 {
-  if (yystackp->yysplitPoint != YY_NULLPTR)
+  if (yystackp->yysplitPoint != YY_NULL)
     {
       yyGLRState* yys;
       int yyn;
@@ -1859,10 +1827,10 @@ yycompressStack (yyGLRStack* yystackp)
 {
   yyGLRState* yyp, *yyq, *yyr;
 
-  if (yystackp->yytops.yysize != 1 || yystackp->yysplitPoint == YY_NULLPTR)
+  if (yystackp->yytops.yysize != 1 || yystackp->yysplitPoint == YY_NULL)
     return;
 
-  for (yyp = yystackp->yytops.yystates[0], yyq = yyp->yypred, yyr = YY_NULLPTR;
+  for (yyp = yystackp->yytops.yystates[0], yyq = yyp->yypred, yyr = YY_NULL;
        yyp != yystackp->yysplitPoint;
        yyr = yyp, yyp = yyq, yyq = yyp->yypred)
     yyp->yypred = yyr;
@@ -1870,10 +1838,10 @@ yycompressStack (yyGLRStack* yystackp)
   yystackp->yyspaceLeft += yystackp->yynextFree - yystackp->yyitems;
   yystackp->yynextFree = ((yyGLRStackItem*) yystackp->yysplitPoint) + 1;
   yystackp->yyspaceLeft -= yystackp->yynextFree - yystackp->yyitems;
-  yystackp->yysplitPoint = YY_NULLPTR;
+  yystackp->yysplitPoint = YY_NULL;
-  yystackp->yylastDeleted = YY_NULLPTR;
+  yystackp->yylastDeleted = YY_NULL;
 
-  while (yyr != YY_NULLPTR)
+  while (yyr != YY_NULL)
     {
       yystackp->yynextFree->yystate = *yyr;
       yyr = yyr->yypred;
@@ -1888,7 +1856,7 @@ static YYRESULTTAG
 yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
                    size_t yyposn]b4_pure_formals[)
 {
-  while (yystackp->yytops.yystates[yyk] != YY_NULLPTR)
+  while (yystackp->yytops.yystates[yyk] != YY_NULL)
     {
       yyStateNum yystate = yystackp->yytops.yystates[yyk]->yylrState;
       YYDPRINTF ((stderr, "Stack %lu Entering state %d\n",
@@ -2010,13 +1978,13 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 #else
   {
   yySymbol yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
-  size_t yysize0 = yytnamerr (YY_NULLPTR, yytokenName (yytoken));
+  size_t yysize0 = yytnamerr (YY_NULL, yytokenName (yytoken));
   size_t yysize = yysize0;
   yybool yysize_overflow = yyfalse;
-  char* yymsg = YY_NULLPTR;
+  char* yymsg = YY_NULL;
   enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
   /* Internationalized format string. */
-  const char *yyformat = YY_NULLPTR;
+  const char *yyformat = YY_NULL;
   /* Arguments of yyformat. */
   char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
   /* Number of reported tokens (one for the "unexpected", one per
@@ -2072,7 +2040,7 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
                   }
                 yyarg[yycount++] = yytokenName (yyx);
                 {
-                  size_t yysz = yysize + yytnamerr (YY_NULLPTR, yytokenName (yyx));
+                  size_t yysz = yysize + yytnamerr (YY_NULL, yytokenName (yyx));
                   yysize_overflow |= yysz < yysize;
                   yysize = yysz;
                 }
@@ -2086,7 +2054,6 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
       case N:                           \
         yyformat = S;                   \
       break
-    default: /* Avoid compiler warnings. */
       YYCASE_(0, YY_("syntax error"));
       YYCASE_(1, YY_("syntax error, unexpected %s"));
       YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
@@ -2151,7 +2118,7 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
       {
         yySymbol yytoken;
         if (yychar == YYEOF)
-          yyFail (yystackp][]b4_lpure_args[, YY_NULLPTR);
+          yyFail (yystackp][]b4_lpure_args[, YY_NULL);
         if (yychar != YYEMPTY)
           {]b4_locations_if([[
             /* We throw away the lookahead, but the error range
@@ -2192,10 +2159,10 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 
   /* Reduce to one stack.  */
   for (yyk = 0; yyk < yystackp->yytops.yysize; yyk += 1)
-    if (yystackp->yytops.yystates[yyk] != YY_NULLPTR)
+    if (yystackp->yytops.yystates[yyk] != YY_NULL)
       break;
   if (yyk >= yystackp->yytops.yysize)
-    yyFail (yystackp][]b4_lpure_args[, YY_NULLPTR);
+    yyFail (yystackp][]b4_lpure_args[, YY_NULL);
   for (yyk += 1; yyk < yystackp->yytops.yysize; yyk += 1)
     yymarkStackDeleted (yystackp, yyk);
   yyremoveDeletes (yystackp);
@@ -2203,7 +2170,7 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 
   /* Now pop stack until we find a state that shifts the error token.  */
   yystackp->yyerrState = 3;
-  while (yystackp->yytops.yystates[0] != YY_NULLPTR)
+  while (yystackp->yytops.yystates[0] != YY_NULL)
     {
       yyGLRState *yys = yystackp->yytops.yystates[0];
       yyj = yypact[yys->yylrState];
@@ -2227,14 +2194,14 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
             }
         }]b4_locations_if([[
       yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
-      if (yys->yypred != YY_NULLPTR)
+      if (yys->yypred != YY_NULL)
         yydestroyGLRState ("Error: popping", yys]b4_user_args[);
       yystackp->yytops.yystates[0] = yys->yypred;
       yystackp->yynextFree -= 1;
       yystackp->yyspaceLeft += 1;
     }
-  if (yystackp->yytops.yystates[0] == YY_NULLPTR)
+  if (yystackp->yytops.yystates[0] == YY_NULL)
-    yyFail (yystackp][]b4_lpure_args[, YY_NULLPTR);
+    yyFail (yystackp][]b4_lpure_args[, YY_NULL);
 }
 
 #define YYCHK1(YYE)                                                          \
@@ -2307,8 +2274,8 @@ b4_dollar_popdef])[]dnl
             {
               yyrule = yydefaultAction (yystate);
               if (yyrule == 0)
-                {]b4_locations_if([[
+                {
-                  yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+]b4_locations_if([[               yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
                   yyreportSyntaxError (&yystack]b4_user_args[);
                   goto yyuser_error;
                 }
@@ -2347,8 +2314,8 @@ b4_dollar_popdef])[]dnl
                     yystack.yyerrState -= 1;
                 }
               else if (yyisErrorAction (yyaction))
-                {]b4_locations_if([[
+                {
-                  yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+]b4_locations_if([[               yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
                   yyreportSyntaxError (&yystack]b4_user_args[);
                   goto yyuser_error;
                 }
@@ -2393,8 +2360,8 @@ b4_dollar_popdef])[]dnl
               if (yystack.yytops.yysize == 0)
                 yyFail (&yystack][]b4_lpure_args[, YY_("syntax error"));
               YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
-              YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));]b4_locations_if([[
+              YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
-              yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+]b4_locations_if([[           yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
               yyreportSyntaxError (&yystack]b4_user_args[);
               goto yyuser_error;
             }
@@ -2475,9 +2442,9 @@ b4_dollar_popdef])[]dnl
               {
                 while (yystates[yyk])
                   {
-                    yyGLRState *yys = yystates[yyk];]b4_locations_if([[
+                    yyGLRState *yys = yystates[yyk];
-                    yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
+]b4_locations_if([[                 yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
-                    if (yys->yypred != YY_NULLPTR)
+)[                  if (yys->yypred != YY_NULL)
                       yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
                     yystates[yyk] = yys->yypred;
                     yystack.yynextFree -= 1;
@@ -2509,7 +2476,7 @@ yy_yypstack (yyGLRState* yys)
 static void
 yypstates (yyGLRState* yyst)
 {
-  if (yyst == YY_NULLPTR)
+  if (yyst == YY_NULL)
     YYFPRINTF (stderr, "<null>");
   else
     yy_yypstack (yyst);
@@ -2523,7 +2490,7 @@ yypstack (yyGLRStack* yystackp, size_t yyk)
 }
 
 #define YYINDEX(YYX)                                                         \
-    ((YYX) == YY_NULLPTR ? -1 : (yyGLRStackItem*) (YYX) - yystackp->yyitems)
+    ((YYX) == YY_NULL ? -1 : (yyGLRStackItem*) (YYX) - yystackp->yyitems)
 
 
 static void
@@ -2537,8 +2504,6 @@ yypdumpstack (yyGLRStack* yystackp)
                  (unsigned long int) (yyp - yystackp->yyitems));
       if (*(yybool *) yyp)
         {
-          YYASSERT (yyp->yystate.yyisState);
-          YYASSERT (yyp->yyoption.yyisState);
           YYFPRINTF (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
                      yyp->yystate.yyresolved, yyp->yystate.yylrState,
                      (unsigned long int) yyp->yystate.yyposn,
@@ -2550,8 +2515,6 @@ yypdumpstack (yyGLRStack* yystackp)
         }
       else
         {
-          YYASSERT (!yyp->yystate.yyisState);
-          YYASSERT (!yyp->yyoption.yyisState);
           YYFPRINTF (stderr, "Option. rule: %d, state: %ld, next: %ld",
                      yyp->yyoption.yyrule - 1,
                      (long int) YYINDEX (yyp->yyoption.yystate),
@@ -2585,3 +2548,16 @@ m4_if(b4_prefix, [yy], [],
 
 ]b4_epilogue[]dnl
 b4_output_end()
+
+# glr.cc produces its own header.
+m4_if(b4_skeleton, ["glr.c"],
+[b4_defines_if(
+[b4_output_begin([b4_spec_defines_file])
+b4_copyright([Skeleton interface for Bison GLR parsers in C],
+             [2002-2013])[
+
+]b4_cpp_guard_open([b4_spec_defines_file])[
+]b4_shared_declarations[
+]b4_cpp_guard_close([b4_spec_defines_file])[
+]b4_output_end()
+])])

data/glr.cc

@@ -1,6 +1,6 @@
 # C++ GLR skeleton for Bison
 
-# Copyright (C) 2002-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2002-2013 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
@@ -177,7 +177,7 @@ m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
   | Print this symbol.  |
   `--------------------*/
 
-  void
+  inline void
   ]b4_parser_class_name[::yy_symbol_value_print_ (int yytype,
                            const semantic_type* yyvaluep]b4_locations_if([[,
                            const location_type* yylocationp]])[)
@@ -329,7 +329,7 @@ b4_percent_define_flag_if([[global_tokens_and_yystype]],
 b4_defines_if(
 [b4_output_begin([b4_spec_defines_file])
 b4_copyright([Skeleton interface for Bison GLR parsers in C++],
-             [2002-2015, 2018])[
+             [2002-2013])[
 
 // C++ GLR parser skeleton written by Akim Demaille.
 

data/java-skel.m4

@@ -2,7 +2,7 @@
 
 # Java skeleton dispatching for Bison.
 
-# Copyright (C) 2007, 2009-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2007, 2009-2013 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

data/java.m4

@@ -2,7 +2,7 @@
 
 # Java language support for Bison
 
-# Copyright (C) 2007-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2007-2013 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

data/lalr1.cc

@@ -1,6 +1,6 @@
 # C++ skeleton for Bison
 
-# Copyright (C) 2002-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2002-2013 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
@@ -131,7 +131,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))])])
 
 
 m4_pushdef([b4_copyright_years],
-           [2002-2015, 2018])
+           [2002-2013])
 
 m4_define([b4_parser_class_name],
           [b4_percent_define_get([[parser_class_name]])])
@@ -142,23 +142,21 @@ b4_bison_locations_if([# Backward compatibility.
 m4_include(b4_pkgdatadir/[stack.hh])
 b4_variant_if([m4_include(b4_pkgdatadir/[variant.hh])])
 
-# b4_shared_declarations(hh|cc)
+# b4_shared_declarations
-# -----------------------------
+# ----------------------
-# Declaration that might either go into the header (if --defines, $1 = hh)
+# Declaration that might either go into the header (if --defines)
 # or open coded in the parser body.
 m4_define([b4_shared_declarations],
 [b4_percent_code_get([[requires]])[
 ]b4_parse_assert_if([# include <cassert>])[
-# include <cstdlib> // std::abort
+# include <vector>
 # include <iostream>
 # include <stdexcept>
-# include <string>
+# include <string>]b4_defines_if([[
-# include <vector>]b4_defines_if([[
 # include "stack.hh"
 ]b4_bison_locations_if([[# include "location.hh"]])])[
 ]b4_variant_if([b4_variant_includes])[
 
-]b4_attribute_define[
 ]b4_YYDEBUG_define[
 
 ]b4_namespace_open[
@@ -185,14 +183,14 @@ b4_location_define])])[
 
 #if ]b4_api_PREFIX[DEBUG
     /// The current debugging stream.
-    std::ostream& debug_stream () const YY_ATTRIBUTE_PURE;
+    std::ostream& debug_stream () const;
     /// Set the current debugging stream.
     void set_debug_stream (std::ostream &);
 
     /// Type for debugging levels.
     typedef int debug_level_type;
     /// The current debugging level.
-    debug_level_type debug_level () const YY_ATTRIBUTE_PURE;
+    debug_level_type debug_level () const;
     /// Set the current debugging level.
     void set_debug_level (debug_level_type l);
 #endif
@@ -215,14 +213,14 @@ b4_location_define])])[
 
     /// Generate an error message.
     /// \param yystate   the state where the error occurred.
-    /// \param yyla      the lookahead token.
+    /// \param yytoken   the lookahead token type, or yyempty_.
     virtual std::string yysyntax_error_ (state_type yystate,
-                                         const symbol_type& yyla) const;
+                                         symbol_number_type yytoken) const;
 
     /// Compute post-reduction state.
     /// \param yystate   the current state
-    /// \param yysym     the nonterminal to push on the stack
+    /// \param yylhs     the nonterminal to push on the stack
-    state_type yy_lr_goto_state_ (state_type yystate, int yysym);
+    state_type yy_lr_goto_state_ (state_type yystate, int yylhs);
 
     /// Whether the given \c yypact_ value indicates a defaulted state.
     /// \param yyvalue   the value to check
@@ -269,7 +267,7 @@ b4_location_define])])[
     /// \brief Reclaim the memory associated to a symbol.
     /// \param yymsg     Why this token is reclaimed.
     ///                  If null, print nothing.
-    /// \param yysym     The symbol.
+    /// \param s         The symbol.
     template <typename Base>
     void yy_destroy_ (const char* yymsg, basic_symbol<Base>& yysym) const;
 
@@ -289,21 +287,16 @@ b4_location_define])])[
       /// Copy constructor.
       by_state (const by_state& other);
 
-      /// Record that this symbol is empty.
-      void clear ();
-
       /// Steal the symbol type from \a that.
       void move (by_state& that);
 
       /// The (internal) type number (corresponding to \a state).
-      /// \a empty_symbol when empty.
+      /// "empty" when empty.
       symbol_number_type type_get () const;
 
-      /// The state number used to denote an empty symbol.
+      enum { empty = 0 };
-      enum { empty_state = -1 };
 
       /// The state.
-      /// \a empty when empty.
       state_type state;
     };
 
@@ -314,8 +307,6 @@ b4_location_define])])[
       typedef basic_symbol<by_state> super_type;
       /// Construct an empty symbol.
       stack_symbol_type ();
-      /// Copy construct.
-      stack_symbol_type (const stack_symbol_type& that);
       /// Steal the contents from \a sym to build this.
       stack_symbol_type (state_type s, symbol_type& sym);
       /// Assignment, needed by push_back.
@@ -344,25 +335,26 @@ b4_location_define])])[
     void yypush_ (const char* m, state_type s, symbol_type& sym);
 
     /// Pop \a n symbols the three stacks.
-    void yypop_ (unsigned n = 1);
+    void yypop_ (unsigned int n = 1);
 
-    /// Constants.
+    // Constants.
     enum
     {
       yyeof_ = 0,
-      yylast_ = ]b4_last[,     ///< Last index in yytable_.
+      yylast_ = ]b4_last[,           //< Last index in yytable_.
-      yynnts_ = ]b4_nterms_number[,  ///< Number of nonterminal symbols.
+      yynnts_ = ]b4_nterms_number[,  //< Number of nonterminal symbols.
-      yyfinal_ = ]b4_final_state_number[, ///< Termination state number.
+      yyempty_ = -2,
+      yyfinal_ = ]b4_final_state_number[, //< Termination state number.
       yyterror_ = 1,
       yyerrcode_ = 256,
-      yyntokens_ = ]b4_tokens_number[  ///< Number of tokens.
+      yyntokens_ = ]b4_tokens_number[    //< Number of tokens.
     };
 
 ]b4_parse_param_vars[
   };
 
-]b4_token_ctor_if([b4_yytranslate_define([$1])[
+]b4_token_ctor_if([b4_yytranslate_define
-]b4_public_types_define([$1])])[
+b4_public_types_define])[
 ]b4_namespace_close[
 
 ]b4_percent_define_flag_if([[global_tokens_and_yystype]],
@@ -388,7 +380,7 @@ b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++])
 // C++ LALR(1) parser skeleton written by Akim Demaille.
 
 ]b4_cpp_guard_open([b4_spec_defines_file])[
-]b4_shared_declarations(hh)[
+]b4_shared_declarations[
 ]b4_cpp_guard_close([b4_spec_defines_file])
 b4_output_end()
 ])
@@ -408,7 +400,7 @@ m4_if(b4_prefix, [yy], [],
 ]b4_null_define[
 
 ]b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]],
-               [b4_shared_declarations([cc])])[
+               [b4_shared_declarations])[
 
 // User implementation prologue.
 ]b4_user_post_prologue[
@@ -445,7 +437,7 @@ m4_if(b4_prefix, [yy], [],
     {                                           \
       *yycdebug_ << Title << ' ';               \
       yy_print_ (*yycdebug_, Symbol);           \
-      *yycdebug_ << '\n';                       \
+      *yycdebug_ << std::endl;                  \
     }                                           \
   } while (false)
 
@@ -464,14 +456,14 @@ m4_if(b4_prefix, [yy], [],
 #else // !]b4_api_PREFIX[DEBUG
 
 # define YYCDEBUG if (false) std::cerr
-# define YY_SYMBOL_PRINT(Title, Symbol)  YYUSE (Symbol)
+# define YY_SYMBOL_PRINT(Title, Symbol)  YYUSE(Symbol)
-# define YY_REDUCE_PRINT(Rule)           static_cast<void> (0)
+# define YY_REDUCE_PRINT(Rule)           static_cast<void>(0)
-# define YY_STACK_PRINT()                static_cast<void> (0)
+# define YY_STACK_PRINT()                static_cast<void>(0)
 
 #endif // !]b4_api_PREFIX[DEBUG
 
 #define yyerrok         (yyerrstatus_ = 0)
-#define yyclearin       (yyla.clear ())
+#define yyclearin       (yyempty = true)
 
 #define YYACCEPT        goto yyacceptlab
 #define YYABORT         goto yyabortlab
@@ -535,54 +527,45 @@ m4_if(b4_prefix, [yy], [],
   | Symbol types.  |
   `---------------*/
 
-]b4_token_ctor_if([], [b4_public_types_define([cc])])[
+]b4_token_ctor_if([], [b4_public_types_define])[
 
   // by_state.
+  inline
   ]b4_parser_class_name[::by_state::by_state ()
-    : state (empty_state)
+    : state (empty)
   {}
 
+  inline
   ]b4_parser_class_name[::by_state::by_state (const by_state& other)
     : state (other.state)
   {}
 
-  void
+  inline
-  ]b4_parser_class_name[::by_state::clear ()
-  {
-    state = empty_state;
-  }
-
   void
   ]b4_parser_class_name[::by_state::move (by_state& that)
   {
     state = that.state;
-    that.clear ();
+    that.state = empty;
   }
 
+  inline
   ]b4_parser_class_name[::by_state::by_state (state_type s)
     : state (s)
   {}
 
+  inline
   ]b4_parser_class_name[::symbol_number_type
   ]b4_parser_class_name[::by_state::type_get () const
   {
-    if (state == empty_state)
+    return state == empty ? 0 : yystos_[state];
-      return empty_symbol;
-    else
-      return yystos_[state];
   }
 
+  inline
   ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type ()
   {}
 
-  ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (const stack_symbol_type& that)
-    : super_type (that.state]b4_locations_if([, that.location])[)
-  {
-    ]b4_variant_if([b4_symbol_variant([that.type_get ()],
-                                      [value], [copy], [that.value])],
-                   [[value = that.value;]])[
-  }
 
+  inline
   ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (state_type s, symbol_type& that)
     : super_type (s]b4_locations_if([, that.location])[)
   {
@@ -590,9 +573,10 @@ m4_if(b4_prefix, [yy], [],
                                       [value], [move], [that.value])],
                    [[value = that.value;]])[
     // that is emptied.
-    that.type = empty_symbol;
+    that.type = empty;
   }
 
+  inline
   ]b4_parser_class_name[::stack_symbol_type&
   ]b4_parser_class_name[::stack_symbol_type::operator= (const stack_symbol_type& that)
   {
@@ -606,6 +590,7 @@ m4_if(b4_prefix, [yy], [],
 
 
   template <typename Base>
+  inline
   void
   ]b4_parser_class_name[::yy_destroy_ (const char* yymsg, basic_symbol<Base>& yysym) const
   {
@@ -625,10 +610,6 @@ m4_if(b4_prefix, [yy], [],
     std::ostream& yyoutput = yyo;
     YYUSE (yyoutput);
     symbol_number_type yytype = yysym.type_get ();
-    // Avoid a (spurious) G++ 4.8 warning about "array subscript is
-    // below array bounds".
-    if (yysym.empty ())
-      std::abort ();
     yyo << (yytype < yyntokens_ ? "token" : "nterm")
         << ' ' << yytname_[yytype] << " ("]b4_locations_if([
         << yysym.location << ": "])[;
@@ -637,6 +618,7 @@ m4_if(b4_prefix, [yy], [],
   }
 #endif
 
+  inline
   void
   ]b4_parser_class_name[::yypush_ (const char* m, state_type s, symbol_type& sym)
   {
@@ -644,6 +626,7 @@ m4_if(b4_prefix, [yy], [],
     yypush_ (m, t);
   }
 
+  inline
   void
   ]b4_parser_class_name[::yypush_ (const char* m, stack_symbol_type& s)
   {
@@ -652,8 +635,9 @@ m4_if(b4_prefix, [yy], [],
     yystack_.push (s);
   }
 
+  inline
   void
-  ]b4_parser_class_name[::yypop_ (unsigned n)
+  ]b4_parser_class_name[::yypop_ (unsigned int n)
   {
     yystack_.pop (n);
   }
@@ -685,23 +669,23 @@ m4_if(b4_prefix, [yy], [],
   }
 #endif // ]b4_api_PREFIX[DEBUG
 
-  ]b4_parser_class_name[::state_type
+  inline ]b4_parser_class_name[::state_type
-  ]b4_parser_class_name[::yy_lr_goto_state_ (state_type yystate, int yysym)
+  ]b4_parser_class_name[::yy_lr_goto_state_ (state_type yystate, int yylhs)
   {
-    int yyr = yypgoto_[yysym - yyntokens_] + yystate;
+    int yyr = yypgoto_[yylhs - yyntokens_] + yystate;
     if (0 <= yyr && yyr <= yylast_ && yycheck_[yyr] == yystate)
       return yytable_[yyr];
     else
-      return yydefgoto_[yysym - yyntokens_];
+      return yydefgoto_[yylhs - yyntokens_];
   }
 
-  bool
+  inline bool
   ]b4_parser_class_name[::yy_pact_value_is_default_ (int yyvalue)
   {
     return yyvalue == yypact_ninf_;
   }
 
-  bool
+  inline bool
   ]b4_parser_class_name[::yy_table_value_is_error_ (int yyvalue)
   {
     return yyvalue == yytable_ninf_;
@@ -710,9 +694,11 @@ m4_if(b4_prefix, [yy], [],
   int
   ]b4_parser_class_name[::parse ()
   {
+    /// Whether yyla contains a lookahead.
+    bool yyempty = true;
+
     // State.
     int yyn;
-    /// Length of the RHS of the rule being reduced.
     int yylen = 0;
 
     // Error handling.
@@ -725,6 +711,9 @@ m4_if(b4_prefix, [yy], [],
     /// The locations where the error started and ended.
     stack_symbol_type yyerror_range[3];]])[
 
+    /// $$ and @@$.
+    stack_symbol_type yylhs;
+
     /// The return value of parse ().
     int yyresult;
 
@@ -732,7 +721,7 @@ m4_if(b4_prefix, [yy], [],
     // avoid gratuitous conflicts when merging into the master branch.
     try
       {
-    YYCDEBUG << "Starting parse\n";
+    YYCDEBUG << "Starting parse" << std::endl;
 
 ]m4_ifdef([b4_initial_action], [
 b4_dollar_pushdef([yyla.value], [], [yyla.location])dnl
@@ -745,11 +734,11 @@ b4_dollar_popdef])[]dnl
        location values to have been already stored, initialize these
        stacks with a primary value.  */
     yystack_.clear ();
-    yypush_ (YY_NULLPTR, 0, yyla);
+    yypush_ (YY_NULL, 0, yyla);
 
     // A new symbol was pushed on the stack.
   yynewstate:
-    YYCDEBUG << "Entering state " << yystack_[0].state << '\n';
+    YYCDEBUG << "Entering state " << yystack_[0].state << std::endl;
 
     // Accept?
     if (yystack_[0].state == yyfinal_)
@@ -766,7 +755,7 @@ b4_dollar_popdef])[]dnl
       goto yydefault;
 
     // Read a lookahead token.
-    if (yyla.empty ())
+    if (yyempty)
       {
         YYCDEBUG << "Reading a token: ";
         try
@@ -780,6 +769,7 @@ b4_dollar_popdef])[]dnl
             error (yyexc);
             goto yyerrlab1;
           }
+        yyempty = false;
       }
     YY_SYMBOL_PRINT ("Next token is", yyla);
 
@@ -799,6 +789,9 @@ b4_dollar_popdef])[]dnl
         goto yyreduce;
       }
 
+    // Discard the token being shifted.
+    yyempty = true;
+
     // Count tokens shifted since error; after three, turn off error status.
     if (yyerrstatus_)
       --yyerrstatus_;
@@ -821,56 +814,52 @@ b4_dollar_popdef])[]dnl
   `-----------------------------*/
   yyreduce:
     yylen = yyr2_[yyn];
-    {
+    yylhs.state = yy_lr_goto_state_(yystack_[yylen].state, yyr1_[yyn]);]b4_variant_if([
-      stack_symbol_type yylhs;
+    /* Variants are always initialized to an empty instance of the
-      yylhs.state = yy_lr_goto_state_ (yystack_[yylen].state, yyr1_[yyn]);]b4_variant_if([
+       correct type. The default $$=$1 action is NOT applied when using
-      /* Variants are always initialized to an empty instance of the
+       variants.  */
-         correct type. The default '$$ = $1' action is NOT applied
+    b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build])],[
-         when using variants.  */
+    /* If YYLEN is nonzero, implement the default value of the action:
-      b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build])], [
+       '$$ = $1'.  Otherwise, use the top of the stack.
-      /* If YYLEN is nonzero, implement the default value of the
-         action: '$$ = $1'.  Otherwise, use the top of the stack.
 
-         Otherwise, the following line sets YYLHS.VALUE to garbage.
+       Otherwise, the following line sets YYLHS.VALUE to garbage.
-         This behavior is undocumented and Bison users should not rely
+       This behavior is undocumented and Bison
-         upon it.  */
+       users should not rely upon it.  */
-      if (yylen)
+    if (yylen)
-        yylhs.value = yystack_@{yylen - 1@}.value;
+      yylhs.value = yystack_@{yylen - 1@}.value;
-      else
+    else
-        yylhs.value = yystack_@{0@}.value;])[
+      yylhs.value = yystack_@{0@}.value;])[
 ]b4_locations_if([dnl
 [
-      // Default location.
+    // Compute the default @@$.
+    {
+      slice<stack_symbol_type, stack_type> slice (yystack_, yylen);
+      YYLLOC_DEFAULT (yylhs.location, slice, yylen);
+    }]])[
+
+    // Perform the reduction.
+    YY_REDUCE_PRINT (yyn);
+    try
       {
-        slice<stack_symbol_type, stack_type> slice (yystack_, yylen);
+        switch (yyn)
-        YYLLOC_DEFAULT (yylhs.location, slice, yylen);
+          {
-        yyerror_range[1].location = yylhs.location;
-      }]])[
-
-      // Perform the reduction.
-      YY_REDUCE_PRINT (yyn);
-      try
-        {
-          switch (yyn)
-            {
 ]b4_user_actions[
-            default:
+          default:
-              break;
+            break;
-            }
+          }
-        }
+      }
-      catch (const syntax_error& yyexc)
+    catch (const syntax_error& yyexc)
-        {
+      {
-          error (yyexc);
+        error (yyexc);
-          YYERROR;
+        YYERROR;
-        }
+      }
-      YY_SYMBOL_PRINT ("-> $$ =", yylhs);
+    YY_SYMBOL_PRINT ("-> $$ =", yylhs);
-      yypop_ (yylen);
+    yypop_ (yylen);
-      yylen = 0;
+    yylen = 0;
-      YY_STACK_PRINT ();
+    YY_STACK_PRINT ();
 
-      // Shift the result of the reduction.
+    // Shift the result of the reduction.
-      yypush_ (YY_NULLPTR, yylhs);
+    yypush_ (YY_NULL, yylhs);
-    }
     goto yynewstate;
 
   /*--------------------------------------.
@@ -882,7 +871,8 @@ b4_dollar_popdef])[]dnl
       {
         ++yynerrs_;
         error (]b4_join(b4_locations_if([yyla.location]),
-                        [[yysyntax_error_ (yystack_[0].state, yyla)]])[);
+                        [[yysyntax_error_ (yystack_[0].state,
+                                           yyempty ? yyempty_ : yyla.type_get ())]])[);
       }
 
 ]b4_locations_if([[
@@ -895,10 +885,10 @@ b4_dollar_popdef])[]dnl
         // Return failure if at end of input.
         if (yyla.type_get () == yyeof_)
           YYABORT;
-        else if (!yyla.empty ())
+        else if (!yyempty)
           {
             yy_destroy_ ("Error: discarding", yyla);
-            yyla.clear ();
+            yyempty = true;
           }
       }
 
@@ -915,7 +905,11 @@ b4_dollar_popdef])[]dnl
        YYERROR and the label yyerrorlab therefore never appears in user
        code.  */
     if (false)
-      goto yyerrorlab;
+      goto yyerrorlab;]b4_locations_if([[
+    yyerror_range[1].location = yystack_[yylen - 1].location;]])b4_variant_if([[
+    /* $$ was initialized before running the user action.  */
+    YY_SYMBOL_PRINT ("Error: discarding", yylhs);
+    yylhs.~stack_symbol_type();]])[
     /* Do not reclaim the symbols of the rule whose action triggered
        this YYERROR.  */
     yypop_ (yylen);
@@ -973,7 +967,7 @@ b4_dollar_popdef])[]dnl
     goto yyreturn;
 
   yyreturn:
-    if (!yyla.empty ())
+    if (!yyempty)
       yy_destroy_ ("Cleanup: discarding lookahead", yyla);
 
     /* Do not reclaim the symbols of the rule whose action triggered
@@ -989,15 +983,16 @@ b4_dollar_popdef])[]dnl
   }
     catch (...)
       {
-        YYCDEBUG << "Exception caught: cleaning lookahead and stack\n";
+        YYCDEBUG << "Exception caught: cleaning lookahead and stack"
+                 << std::endl;
         // Do not try to display the values of the reclaimed symbols,
         // as their printer might throw an exception.
-        if (!yyla.empty ())
+        if (!yyempty)
-          yy_destroy_ (YY_NULLPTR, yyla);
+          yy_destroy_ (YY_NULL, yyla);
 
         while (1 < yystack_.size ())
           {
-            yy_destroy_ (YY_NULLPTR, yystack_[0]);
+            yy_destroy_ (YY_NULL, yystack_[0]);
             yypop_ ();
           }
         throw;
@@ -1008,15 +1003,16 @@ b4_dollar_popdef])[]dnl
   ]b4_parser_class_name[::error (const syntax_error& yyexc)
   {
     error (]b4_join(b4_locations_if([yyexc.location]),
-                    [[yyexc.what ()]])[);
+                    [[yyexc.what()]])[);
   }
 
   // Generate an error message.
   std::string
   ]b4_parser_class_name[::yysyntax_error_ (]dnl
-b4_error_verbose_if([state_type yystate, const symbol_type& yyla],
+b4_error_verbose_if([state_type yystate, symbol_number_type yytoken],
-                    [state_type, const symbol_type&])[) const
+                    [state_type, symbol_number_type])[) const
   {]b4_error_verbose_if([[
+    std::string yyres;
     // Number of reported tokens (one for the "unexpected", one per
     // "expected").
     size_t yycount = 0;
@@ -1030,7 +1026,7 @@ b4_error_verbose_if([state_type yystate, const symbol_type& yyla],
          the only way this function was invoked is if the default action
          is an error action.  In that case, don't check for expected
          tokens because there are none.
-       - The only way there can be no lookahead present (in yyla) is
+       - The only way there can be no lookahead present (in yytoken) is
          if this state is a consistent state with a default action.
          Thus, detecting the absence of a lookahead is sufficient to
          determine that there is no unexpected or expected token to
@@ -1050,9 +1046,8 @@ b4_error_verbose_if([state_type yystate, const symbol_type& yyla],
          token that will not be accepted due to an error action in a
          later state.
     */
-    if (!yyla.empty ())
+    if (yytoken != yyempty_)
       {
-        int yytoken = yyla.type_get ();
         yyarg[yycount++] = yytname_[yytoken];
         int yyn = yypact_[yystate];
         if (!yy_pact_value_is_default_ (yyn))
@@ -1079,24 +1074,22 @@ b4_error_verbose_if([state_type yystate, const symbol_type& yyla],
           }
       }
 
-    char const* yyformat = YY_NULLPTR;
+    char const* yyformat = YY_NULL;
     switch (yycount)
       {
 #define YYCASE_(N, S)                         \
         case N:                               \
           yyformat = S;                       \
         break
-      default: // Avoid compiler warnings.
+        YYCASE_(0, YY_("syntax error"));
-        YYCASE_ (0, YY_("syntax error"));
+        YYCASE_(1, YY_("syntax error, unexpected %s"));
-        YYCASE_ (1, YY_("syntax error, unexpected %s"));
+        YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
-        YYCASE_ (2, YY_("syntax error, unexpected %s, expecting %s"));
+        YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
-        YYCASE_ (3, YY_("syntax error, unexpected %s, expecting %s or %s"));
+        YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
-        YYCASE_ (4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
+        YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
-        YYCASE_ (5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
 #undef YYCASE_
       }
 
-    std::string yyres;
     // Argument number.
     size_t yyi = 0;
     for (char const* yyp = yyformat; *yyp; ++yyp)
@@ -1140,18 +1133,18 @@ b4_error_verbose_if([state_type yystate, const symbol_type& yyla],
            i_end = yystack_.end ();
          i != i_end; ++i)
       *yycdebug_ << ' ' << i->state;
-    *yycdebug_ << '\n';
+    *yycdebug_ << std::endl;
   }
 
   // Report on the debug stream that the rule \a yyrule is going to be reduced.
   void
   ]b4_parser_class_name[::yy_reduce_print_ (int yyrule)
   {
-    unsigned yylno = yyrline_[yyrule];
+    unsigned int yylno = yyrline_[yyrule];
     int yynrhs = yyr2_[yyrule];
     // Print the symbols being reduced, and their result.
     *yycdebug_ << "Reducing stack by rule " << yyrule - 1
-               << " (line " << yylno << "):\n";
+               << " (line " << yylno << "):" << std::endl;
     // The symbols being reduced.
     for (int yyi = 0; yyi < yynrhs; yyi++)
       YY_SYMBOL_PRINT ("   $" << yyi + 1 << " =",
@@ -1159,7 +1152,7 @@ b4_error_verbose_if([state_type yystate, const symbol_type& yyla],
   }
 #endif // ]b4_api_PREFIX[DEBUG
 
-]b4_token_ctor_if([], [b4_yytranslate_define([cc])])[
+]b4_token_ctor_if([], [b4_yytranslate_define])[
 ]b4_namespace_close[
 ]b4_epilogue[]dnl
 b4_output_end()

data/lalr1.java

@@ -1,6 +1,6 @@
 # Java skeleton for Bison -*- autoconf -*-
 
-# Copyright (C) 2007-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2007-2013 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
@@ -84,7 +84,7 @@ 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])
+             [2007-2013])
 
 b4_percent_define_ifdef([package], [package b4_percent_define_get([package]);
 ])[/* First part of user declarations.  */
@@ -453,19 +453,6 @@ b4_define_state])[
     return yyerrstatus_ == 0;
   }
 
-  /** Compute post-reduction state.
-   * @@param yystate   the current state
-   * @@param yysym     the nonterminal to push on the stack
-   */
-  private int yy_lr_goto_state_ (int yystate, int yysym)
-  {
-    int yyr = yypgoto_[yysym - yyntokens_] + yystate;
-    if (0 <= yyr && yyr <= yylast_ && yycheck_[yyr] == yystate)
-      return yytable_[yyr];
-    else
-      return yydefgoto_[yysym - yyntokens_];
-  }
-
   private int yyaction (int yyn, YYStack yystack, int yylen) ]b4_maybe_throws([b4_throws])[
   {
     ]b4_yystype[ yyval;
@@ -496,7 +483,14 @@ b4_define_state])[
     yylen = 0;
 
     /* Shift the result of the reduction.  */
-    int yystate = yy_lr_goto_state_ (yystack.stateAt (0), yyr1_[yyn]);
+    yyn = yyr1_[yyn];
+    int yystate = yypgoto_[yyn - yyntokens_] + yystack.stateAt (0);
+    if (0 <= yystate && yystate <= yylast_
+        && yycheck_[yystate] == yystack.stateAt (0))
+      yystate = yytable_[yystate];
+    else
+      yystate = yydefgoto_[yyn - yyntokens_];
+
     yystack.push (yystate, yyval]b4_locations_if([, yyloc])[);
     return YYNEWSTATE;
   }

data/local.mk

@@ -1,4 +1,4 @@
-## Copyright (C) 2002, 2005-2015, 2018 Free Software Foundation, Inc.
+## Copyright (C) 2002, 2005-2013 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

data/location.cc

@@ -1,6 +1,6 @@
 # C++ skeleton for Bison
 
-# Copyright (C) 2002-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2002-2013 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])
+           [2002-2013])
 
 # b4_position_define
 # ------------------
@@ -27,19 +27,20 @@ m4_define([b4_position_define],
   {
   public:]m4_ifdef([b4_location_constructors], [[
     /// Construct a position.
-    explicit position (]b4_percent_define_get([[filename_type]])[* f = YY_NULLPTR,
+    explicit position (]b4_percent_define_get([[filename_type]])[* f = YY_NULL,
-                       unsigned l = ]b4_location_initial_line[u,
+                       unsigned int l = ]b4_location_initial_line[u,
-                       unsigned c = ]b4_location_initial_column[u)
+                       unsigned int c = ]b4_location_initial_column[u)
       : filename (f)
       , line (l)
       , column (c)
-    {}
+    {
+    }
 
 ]])[
     /// Initialization.
-    void initialize (]b4_percent_define_get([[filename_type]])[* fn = YY_NULLPTR,
+    void initialize (]b4_percent_define_get([[filename_type]])[* fn = YY_NULL,
-                     unsigned l = ]b4_location_initial_line[u,
+                     unsigned int l = ]b4_location_initial_line[u,
-                     unsigned c = ]b4_location_initial_column[u)
+                     unsigned int c = ]b4_location_initial_column[u)
     {
       filename = fn;
       line = l;
@@ -68,21 +69,21 @@ m4_define([b4_position_define],
     /// File name to which this position refers.
     ]b4_percent_define_get([[filename_type]])[* filename;
     /// Current line number.
-    unsigned line;
+    unsigned int line;
     /// Current column number.
-    unsigned column;
+    unsigned int column;
 
   private:
     /// Compute max(min, lhs+rhs) (provided min <= lhs).
-    static unsigned add_ (unsigned lhs, int rhs, unsigned min)
+    static unsigned int add_ (unsigned int lhs, int rhs, unsigned int min)
     {
-      return (0 < rhs || -static_cast<unsigned>(rhs) < lhs
+      return (0 < rhs || -static_cast<unsigned int>(rhs) < lhs
               ? rhs + lhs
               : min);
     }
   };
 
-  /// Add \a width columns, in place.
+  /// Add and assign a position.
   inline position&
   operator+= (position& res, int width)
   {
@@ -90,21 +91,21 @@ m4_define([b4_position_define],
     return res;
   }
 
-  /// Add \a width columns.
+  /// Add two position objects.
   inline position
   operator+ (position res, int width)
   {
     return res += width;
   }
 
-  /// Subtract \a width columns, in place.
+  /// Add and assign a position.
   inline position&
   operator-= (position& res, int width)
   {
     return res += -width;
   }
 
-  /// Subtract \a width columns.
+  /// Add two position objects.
   inline position
   operator- (position res, int width)
   {
@@ -156,27 +157,30 @@ m4_define([b4_location_define],
     location (const position& b, const position& e)
       : begin (b)
       , end (e)
-    {}
+    {
+    }
 
     /// Construct a 0-width location in \a p.
     explicit location (const position& p = position ())
       : begin (p)
       , end (p)
-    {}
+    {
+    }
 
     /// Construct a 0-width location in \a f, \a l, \a c.
     explicit location (]b4_percent_define_get([[filename_type]])[* f,
-                       unsigned l = ]b4_location_initial_line[u,
+                       unsigned int l = ]b4_location_initial_line[u,
-                       unsigned c = ]b4_location_initial_column[u)
+                       unsigned int c = ]b4_location_initial_column[u)
       : begin (f, l, c)
       , end (f, l, c)
-    {}
+    {
+    }
 
 ])[
     /// Initialization.
-    void initialize (]b4_percent_define_get([[filename_type]])[* f = YY_NULLPTR,
+    void initialize (]b4_percent_define_get([[filename_type]])[* f = YY_NULL,
-                     unsigned l = ]b4_location_initial_line[u,
+                     unsigned int l = ]b4_location_initial_line[u,
-                     unsigned c = ]b4_location_initial_column[u)
+                     unsigned int c = ]b4_location_initial_column[u)
     {
       begin.initialize (f, l, c);
       end = begin;
@@ -212,42 +216,36 @@ m4_define([b4_location_define],
     position end;
   };
 
-  /// Join two locations, in place.
+  /// Join two location objects to create a location.
-  inline location& operator+= (location& res, const location& end)
+  inline location operator+ (location res, const location& end)
   {
     res.end = end.end;
     return res;
   }
 
-  /// Join two locations.
+  /// Change end position in place.
-  inline location operator+ (location res, const location& end)
-  {
-    return res += end;
-  }
-
-  /// Add \a width columns to the end position, in place.
   inline location& operator+= (location& res, int width)
   {
     res.columns (width);
     return res;
   }
 
-  /// Add \a width columns to the end position.
+  /// Change end position.
   inline location operator+ (location res, int width)
   {
     return res += width;
   }
 
-  /// Subtract \a width columns to the end position, in place.
+  /// Change end position in place.
   inline location& operator-= (location& res, int width)
   {
     return res += -width;
   }
 
-  /// Subtract \a width columns to the end position.
+  /// Change end position.
-  inline location operator- (location res, int width)
+  inline location operator- (const location& begin, int width)
   {
-    return res -= width;
+    return begin + -width;
   }
 ]b4_percent_define_flag_if([[define_location_comparison]], [[
   /// Compare two location objects.
@@ -274,8 +272,9 @@ m4_define([b4_location_define],
   inline std::basic_ostream<YYChar>&
   operator<< (std::basic_ostream<YYChar>& ostr, const location& loc)
   {
-    unsigned end_col = 0 < loc.end.column ? loc.end.column - 1 : 0;
+    unsigned int end_col = 0 < loc.end.column ? loc.end.column - 1 : 0;
-    ostr << loc.begin;
+    ostr << loc.begin// << "(" << loc.end << ") "
+;
     if (loc.end.filename
         && (!loc.begin.filename
             || *loc.begin.filename != *loc.end.filename))

data/stack.hh

@@ -1,6 +1,6 @@
 # C++ skeleton for Bison
 
-# Copyright (C) 2002-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2002-2013 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
@@ -16,13 +16,12 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 m4_pushdef([b4_copyright_years],
-           [2002-2015, 2018])
+           [2002-2013])
 
 # b4_stack_define
 # ---------------
 m4_define([b4_stack_define],
-[[  /// A stack with random access from its top.
+[[  template <class T, class S = std::vector<T> >
-  template <class T, class S = std::vector<T> >
   class stack
   {
   public:
@@ -33,27 +32,23 @@ m4_define([b4_stack_define],
     stack ()
       : seq_ ()
     {
-      seq_.reserve (200);
     }
 
-    stack (unsigned n)
+    stack (unsigned int n)
       : seq_ (n)
-    {}
+    {
+    }
 
-    /// Random access.
+    inline
-    ///
-    /// Index 0 returns the topmost element.
     T&
-    operator[] (unsigned i)
+    operator[] (unsigned int i)
     {
       return seq_[seq_.size () - 1 - i];
     }
 
-    /// Random access.
+    inline
-    ///
-    /// Index 0 returns the topmost element.
     const T&
-    operator[] (unsigned i) const
+    operator[] (unsigned int i) const
     {
       return seq_[seq_.size () - 1 - i];
     }
@@ -61,6 +56,7 @@ m4_define([b4_stack_define],
     /// Steal the contents of \a t.
     ///
     /// Close to move-semantics.
+    inline
     void
     push (T& t)
     {
@@ -68,8 +64,9 @@ m4_define([b4_stack_define],
       operator[](0).move (t);
     }
 
+    inline
     void
-    pop (unsigned n = 1)
+    pop (unsigned int n = 1)
     {
       for (; n; --n)
         seq_.pop_back ();
@@ -81,18 +78,21 @@ m4_define([b4_stack_define],
       seq_.clear ();
     }
 
+    inline
     typename S::size_type
     size () const
     {
       return seq_.size ();
     }
 
+    inline
     const_iterator
     begin () const
     {
       return seq_.rbegin ();
     }
 
+    inline
     const_iterator
     end () const
     {
@@ -111,20 +111,22 @@ m4_define([b4_stack_define],
   class slice
   {
   public:
-    slice (const S& stack, unsigned range)
+    slice (const S& stack, unsigned int range)
       : stack_ (stack)
       , range_ (range)
-    {}
+    {
+    }
 
+    inline
     const T&
-    operator [] (unsigned i) const
+    operator [] (unsigned int i) const
     {
       return stack_[range_ - i];
     }
 
   private:
     const S& stack_;
-    unsigned range_;
+    unsigned int range_;
   };
 ]])
 

data/variant.hh

@@ -1,6 +1,6 @@
 # C++ skeleton for Bison
 
-# Copyright (C) 2002-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2002-2013 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
@@ -27,7 +27,7 @@
 m4_define([b4_symbol_variant],
 [m4_pushdef([b4_dollar_dollar],
             [$2.$3< $][3 > (m4_shift3($@))])dnl
-switch ($1)
+  switch ($1)
     {
 b4_type_foreach([b4_type_action_])[]dnl
       default:
@@ -95,13 +95,13 @@ m4_define([b4_variant_define],
 
     /// Empty construction.
     variant ()]b4_parse_assert_if([
-      : yytypeid_ (YY_NULLPTR)])[
+      : yytname_ (YY_NULL)])[
     {}
 
     /// Construct and fill.
     template <typename T>
     variant (const T& t)]b4_parse_assert_if([
-      : yytypeid_ (&typeid (T))])[
+      : yytname_ (typeid (T).name ())])[
     {
       YYASSERT (sizeof (T) <= S);
       new (yyas_<T> ()) T (t);
@@ -110,7 +110,7 @@ m4_define([b4_variant_define],
     /// Destruction, allowed only if empty.
     ~variant ()
     {]b4_parse_assert_if([
-      YYASSERT (!yytypeid_);
+      YYASSERT (!yytname_);
     ])[}
 
     /// Instantiate an empty \a T in here.
@@ -118,9 +118,9 @@ m4_define([b4_variant_define],
     T&
     build ()
     {]b4_parse_assert_if([
-      YYASSERT (!yytypeid_);
+      YYASSERT (!yytname_);
       YYASSERT (sizeof (T) <= S);
-      yytypeid_ = & typeid (T);])[
+      yytname_ = typeid (T).name ();])[
       return *new (yyas_<T> ()) T;
     }
 
@@ -129,9 +129,9 @@ m4_define([b4_variant_define],
     T&
     build (const T& t)
     {]b4_parse_assert_if([
-      YYASSERT (!yytypeid_);
+      YYASSERT (!yytname_);
       YYASSERT (sizeof (T) <= S);
-      yytypeid_ = & typeid (T);])[
+      yytname_ = typeid (T).name ();])[
       return *new (yyas_<T> ()) T (t);
     }
 
@@ -140,7 +140,7 @@ m4_define([b4_variant_define],
     T&
     as ()
     {]b4_parse_assert_if([
-      YYASSERT (*yytypeid_ == typeid (T));
+      YYASSERT (yytname_ == typeid (T).name ());
       YYASSERT (sizeof (T) <= S);])[
       return *yyas_<T> ();
     }
@@ -150,7 +150,7 @@ m4_define([b4_variant_define],
     const T&
     as () const
     {]b4_parse_assert_if([
-      YYASSERT (*yytypeid_ == typeid (T));
+      YYASSERT (yytname_ == typeid (T).name ());
       YYASSERT (sizeof (T) <= S);])[
       return *yyas_<T> ();
     }
@@ -167,8 +167,8 @@ m4_define([b4_variant_define],
     void
     swap (self_type& other)
     {]b4_parse_assert_if([
-      YYASSERT (yytypeid_);
+      YYASSERT (yytname_);
-      YYASSERT (*yytypeid_ == *other.yytypeid_);])[
+      YYASSERT (yytname_ == other.yytname_);])[
       std::swap (as<T> (), other.as<T> ());
     }
 
@@ -178,7 +178,8 @@ m4_define([b4_variant_define],
     template <typename T>
     void
     move (self_type& other)
-    {
+    {]b4_parse_assert_if([
+      YYASSERT (!yytname_);])[
       build<T> ();
       swap<T> (other);
       other.destroy<T> ();
@@ -198,7 +199,7 @@ m4_define([b4_variant_define],
     destroy ()
     {
       as<T> ().~T ();]b4_parse_assert_if([
-      yytypeid_ = YY_NULLPTR;])[
+      yytname_ = YY_NULL;])[
     }
 
   private:
@@ -233,7 +234,7 @@ m4_define([b4_variant_define],
     } yybuffer_;]b4_parse_assert_if([
 
     /// Whether the content is built: if defined, the name of the stored type.
-    const std::type_info *yytypeid_;])[
+    const char *yytname_;])[
   };
 ]])
 
@@ -320,6 +321,7 @@ b4_join(b4_symbol_if([$1], [has_type],
     return symbol_type (b4_join([token::b4_symbol([$1], [id])],
                                 b4_symbol_if([$1], [has_type], [v]),
                                 b4_locations_if([l])));
+
   }
 
 ])])])

data/xslt/bison.xsl

@@ -3,7 +3,7 @@
 <!--
     bison.xsl - common templates for Bison XSLT.
 
-    Copyright (C) 2007-2015, 2018 Free Software Foundation, Inc.
+    Copyright (C) 2007-2013 Free Software Foundation, Inc.
 
     This file is part of Bison, the GNU Compiler Compiler.
 

data/xslt/xml2dot.xsl

@@ -3,7 +3,7 @@
 <!--
     xml2dot.xsl - transform Bison XML Report into DOT.
 
-    Copyright (C) 2007-2015, 2018 Free Software Foundation, Inc.
+    Copyright (C) 2007-2013 Free Software Foundation, Inc.
 
     This file is part of Bison, the GNU Compiler Compiler.
 
@@ -201,8 +201,6 @@
   <xsl:if test="$point = 0">
     <xsl:text> .</xsl:text>
   </xsl:if>
-
-  <!-- RHS -->
   <xsl:for-each select="rhs/symbol|rhs/empty">
     <xsl:apply-templates select="."/>
     <xsl:if test="$point = position()">
@@ -216,9 +214,7 @@
   <xsl:value-of select="."/>
 </xsl:template>
 
-<xsl:template match="empty">
+<xsl:template match="empty"/>
-  <xsl:text> %empty</xsl:text>
-</xsl:template>
 
 <xsl:template match="lookaheads">
   <xsl:text>  [</xsl:text>

data/xslt/xml2text.xsl

@@ -3,7 +3,7 @@
 <!--
     xml2text.xsl - transform Bison XML Report into plain text.
 
-    Copyright (C) 2007-2015, 2018 Free Software Foundation, Inc.
+    Copyright (C) 2007-2013 Free Software Foundation, Inc.
 
     This file is part of Bison, the GNU Compiler Compiler.
 
@@ -350,7 +350,12 @@
     <xsl:if test="position() = $point + 1">
       <xsl:text> .</xsl:text>
     </xsl:if>
-    <xsl:apply-templates select="."/>
+    <xsl:if test="$itemset = 'true' and name(.) != 'empty'">
+      <xsl:apply-templates select="."/>
+    </xsl:if>
+    <xsl:if test="$itemset != 'true'">
+      <xsl:apply-templates select="."/>
+    </xsl:if>
     <xsl:if test="position() = last() and position() = $point">
       <xsl:text> .</xsl:text>
     </xsl:if>

data/xslt/xml2xhtml.xsl

@@ -3,7 +3,7 @@
 <!--
     xml2html.xsl - transform Bison XML Report into XHTML.
 
-    Copyright (C) 2007-2015, 2018 Free Software Foundation, Inc.
+    Copyright (C) 2007-2013 Free Software Foundation, Inc.
 
     This file is part of Bison, the GNU Compiler Compiler.
 
@@ -532,7 +532,12 @@
       <xsl:text> </xsl:text>
       <span class="point">.</span>
     </xsl:if>
-    <xsl:apply-templates select="."/>
+    <xsl:if test="$itemset = 'true' and name(.) != 'empty'">
+      <xsl:apply-templates select="."/>
+    </xsl:if>
+    <xsl:if test="$itemset != 'true'">
+      <xsl:apply-templates select="."/>
+    </xsl:if>
     <xsl:if test="position() = last() and position() = $point">
       <xsl:text> </xsl:text>
       <span class="point">.</span>
@@ -558,7 +563,7 @@
 </xsl:template>
 
 <xsl:template match="empty">
-  <xsl:text> %empty</xsl:text>
+  <xsl:text> &#949;</xsl:text>
 </xsl:template>
 
 <xsl:template match="lookaheads">

data/yacc.c

@@ -1,11 +1,11 @@
                                                              -*- C -*-
 # Yacc compatible skeleton for Bison
 
-# Copyright (C) 1984, 1989-1990, 2000-2015, 2018 Free Software
+# Copyright (C) 1984, 1989-1990, 2000-2013 Free Software Foundation,
-# Foundation, Inc.
+# Inc.
 
 m4_pushdef([b4_copyright_years],
-           [1984, 1989-1990, 2000-2015, 2018])
+           [1984, 1989-1990, 2000-2013])
 
 # 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
@@ -1108,11 +1108,11 @@ yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
                 ]b4_lac_if([[yytype_int16 *yyesa, yytype_int16 **yyes,
                 YYSIZE_T *yyes_capacity, ]])[yytype_int16 *yyssp, int yytoken)
 {
-  YYSIZE_T yysize0 = yytnamerr (YY_NULLPTR, yytname[yytoken]);
+  YYSIZE_T yysize0 = yytnamerr (YY_NULL, yytname[yytoken]);
   YYSIZE_T yysize = yysize0;
   enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
   /* Internationalized format string. */
-  const char *yyformat = YY_NULLPTR;
+  const char *yyformat = YY_NULL;
   /* Arguments of yyformat. */
   char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
   /* Number of reported tokens (one for the "unexpected", one per
@@ -1187,7 +1187,7 @@ yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
                   }
                 yyarg[yycount++] = yytname[yyx];
                 {
-                  YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULLPTR, yytname[yyx]);
+                  YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULL, yytname[yyx]);
                   if (! (yysize <= yysize1
                          && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
                     return 2;
@@ -1207,7 +1207,6 @@ yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
       case N:                               \
         yyformat = S;                       \
       break
-    default: /* Avoid compiler warnings. */
       YYCASE_(0, YY_("syntax error"));
       YYCASE_(1, YY_("syntax error, unexpected %s"));
       YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
@@ -1272,7 +1271,7 @@ static char yypstate_allocated = 0;]])b4_pull_if([
 
 b4_function_define([[yyparse]], [[int]], b4_parse_param)[
 {
-  return yypull_parse (YY_NULLPTR]m4_ifset([b4_parse_param],
+  return yypull_parse (YY_NULL]m4_ifset([b4_parse_param],
                                   [[, ]b4_args(b4_parse_param)])[);
 }
 
@@ -1314,10 +1313,10 @@ b4_function_define([[yyparse]], [[int]], b4_parse_param)[
 {
   yypstate *yyps;]b4_pure_if([], [[
   if (yypstate_allocated)
-    return YY_NULLPTR;]])[
+    return YY_NULL;]])[
   yyps = (yypstate *) malloc (sizeof *yyps);
   if (!yyps)
-    return YY_NULLPTR;
+    return YY_NULL;
   yyps->yynew = 1;]b4_pure_if([], [[
   yypstate_allocated = 1;]])[
   return yyps;
@@ -1642,9 +1641,8 @@ yyreduce:
   yyval = yyvsp[1-yylen];
 
 ]b4_locations_if(
-[[  /* Default location. */
+[[  /* Default location.  */
-  YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);
+  YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
-  yyerror_range[1] = yyloc;]])[
   YY_REDUCE_PRINT (yyn);]b4_lac_if([[
   {
     int yychar_backup = yychar;
@@ -1784,7 +1782,8 @@ yyerrorlab:
   if (/*CONSTCOND*/ 0)
      goto yyerrorlab;
 
-  /* Do not reclaim the symbols of the rule whose action triggered
+]b4_locations_if([[  yyerror_range[1] = yylsp[1-yylen];
+]])[  /* Do not reclaim the symbols of the rule whose action triggered
      this YYERROR.  */
   YYPOPSTACK (yylen);
   yylen = 0;

djgpp/Makefile.maint

@@ -1,7 +1,7 @@
 # DJGPP Maintainer's Makefile                                    -*-Makefile-*-
 # Requires GNU sed
 
-## Copyright (C) 2005-2015, 2018 Free Software Foundation, Inc.
+## Copyright (C) 2005-2013 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

djgpp/README.in

@@ -1,6 +1,6 @@
 This is a port of GNU Bison @VERSION@ to MSDOS/DJGPP.
 
-Copyright (C) 2005-2015, 2018 Free Software Foundation, Inc.
+Copyright (C) 2005-2013 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

djgpp/config.bat

@@ -4,7 +4,7 @@ Rem Configure Bison for DJGPP.
 Rem WARNING WARNING WARNING: This file needs to have DOS CRLF end-of-line
 Rem format, or else stock DOS/Windows shells will refuse to run it.
 
-Rem Copyright (C) 2005-2015, 2018 Free Software Foundation, Inc.
+Rem Copyright (C) 2005-2013 Free Software Foundation, Inc.
 
 Rem This program is free software: you can redistribute it and/or modify
 Rem it under the terms of the GNU General Public License as published by

djgpp/config.sed

@@ -2,7 +2,7 @@
 # Sed script for additional DJGPP specific editing
 # of the configure script generated by autoconf 2.62.
 
-# Copyright (C) 2005-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2005-2013 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

djgpp/config.site

@@ -3,7 +3,7 @@
 # This is the config.site file for configuring GNU packages
 # which are to be built with DJGPP tools.
 
-# Copyright (C) 2005-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2005-2013 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

djgpp/config_h.sed

@@ -1,6 +1,6 @@
 # sed script for DJGPP specific editing of config.hin
 
-# Copyright (C) 2005-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2005-2013 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

djgpp/djunpack.bat

@@ -7,7 +7,7 @@ Rem This batch file unpacks the Bison distribution while simultaneously
 Rem renaming some of the files whose names are invalid on DOS or conflict
 Rem with other file names after truncation to DOS 8+3 namespace.
 Rem
-Rem Copyright (C) 2005-2015, 2018 Free Software Foundation, Inc.
+Rem Copyright (C) 2005-2013 Free Software Foundation, Inc.
 Rem
 Rem This program is free software: you can redistribute it and/or modify
 Rem it under the terms of the GNU General Public License as published by

djgpp/local.mk

@@ -1,4 +1,4 @@
-## Copyright (C) 2008-2015, 2018 Free Software Foundation, Inc.
+## Copyright (C) 2008-2013 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

djgpp/subpipe.c

@@ -1,6 +1,6 @@
 /* Subprocesses with pipes.
 
-   Copyright (C) 2005-2015, 2018 Free Software Foundation, Inc.
+   Copyright (C) 2005-2013 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

djgpp/subpipe.h

@@ -1,6 +1,6 @@
 /* Subprocesses with pipes.
 
-   Copyright (C) 2005-2015, 2018 Free Software Foundation, Inc.
+   Copyright (C) 2005-2013 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

djgpp/testsuite.sed

@@ -2,7 +2,7 @@
 # Sed script for additional DJGPP specific editing
 # of the testsuite script generated by autoconf 2.61.
 
-# Copyright (C) 2007-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2007-2013 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

doc/.gitignore

@@ -27,4 +27,3 @@
 /stamp-vti
 /version.texi
 /yacc.1
-/gendocs_template_min

doc/bison.texi

@@ -1,8 +1,6 @@
 \input texinfo @c -*-texinfo-*-
 @comment %**start of header
 @setfilename bison.info
-@documentencoding UTF-8
-@documentlanguage en
 @include version.texi
 @settitle Bison @value{VERSION}
 @setchapternewpage odd
@@ -35,7 +33,7 @@
 This manual (@value{UPDATED}) is for GNU Bison (version
 @value{VERSION}), the GNU parser generator.
 
-Copyright @copyright{} 1988-1993, 1995, 1998-2015, 2018 Free Software
+Copyright @copyright{} 1988-1993, 1995, 1998-2013 Free Software
 Foundation, Inc.
 
 @quotation
@@ -143,7 +141,7 @@ Writing GLR Parsers
 
 Examples
 
-* RPN Calc::               Reverse Polish Notation Calculator;
+* RPN Calc::               Reverse polish notation calculator;
                              a first example with no operator precedence.
 * Infix Calc::             Infix (algebraic) notation calculator.
                              Operator precedence is introduced.
@@ -1493,7 +1491,7 @@ simple program, all the rest of the program can go here.
 @cindex examples, simple
 
 Now we show and explain several sample programs written using Bison: a
-Reverse Polish Notation calculator, an algebraic (infix) notation
+reverse polish notation calculator, an algebraic (infix) notation
 calculator --- later extended to track ``locations'' ---
 and a multi-function calculator.  All
 produce usable, though limited, interactive desk-top calculators.
@@ -1503,7 +1501,7 @@ languages are written the same way.  You can copy these examples into a
 source file to try them.
 
 @menu
-* RPN Calc::               Reverse Polish Notation Calculator;
+* RPN Calc::               Reverse polish notation calculator;
                              a first example with no operator precedence.
 * Infix Calc::             Infix (algebraic) notation calculator.
                              Operator precedence is introduced.
@@ -1516,12 +1514,13 @@ source file to try them.
 
 @node RPN Calc
 @section Reverse Polish Notation Calculator
-@cindex Reverse Polish Notation
+@cindex reverse polish notation
+@cindex polish notation calculator
 @cindex @code{rpcalc}
 @cindex calculator, simple
 
-The first example is that of a simple double-precision @dfn{Reverse Polish
+The first example is that of a simple double-precision @dfn{reverse polish
-Notation} calculator (a calculator using postfix operators).  This example
+notation} calculator (a calculator using postfix operators).  This example
 provides a good starting point, since operator precedence is not an issue.
 The second example will illustrate how operator precedence is handled.
 
@@ -1541,12 +1540,12 @@ The source code for this calculator is named @file{rpcalc.y}.  The
 @node Rpcalc Declarations
 @subsection Declarations for @code{rpcalc}
 
-Here are the C and Bison declarations for the Reverse Polish Notation
+Here are the C and Bison declarations for the reverse polish notation
 calculator.  As in C, comments are placed between @samp{/*@dots{}*/}.
 
 @comment file: rpcalc.y
 @example
-/* Reverse Polish Notation calculator.  */
+/* Reverse polish notation calculator.  */
 
 @group
 %@{
@@ -1597,7 +1596,7 @@ declared is @code{NUM}, the token type for numeric constants.
 @node Rpcalc Rules
 @subsection Grammar Rules for @code{rpcalc}
 
-Here are the grammar rules for the Reverse Polish Notation calculator.
+Here are the grammar rules for the reverse polish notation calculator.
 
 @comment file: rpcalc.y
 @example
@@ -3850,7 +3849,7 @@ example:
 @noindent
 specifies the union tag @code{value}, so the corresponding C type is
 @code{union value}.  If you do not specify a tag, it defaults to
-@code{YYSTYPE} (@pxref{%define Summary,,api.value.union.name}).
+@code{YYSTYPE}.
 
 As another extension to POSIX, you may specify multiple @code{%union}
 declarations; their contents are concatenated.  However, only the first
@@ -5144,9 +5143,7 @@ value by default.  However, when the parser displays a @code{STRING1} or a
 @code{string1}, it formats it as a string in double quotes.  It performs
 only the second @code{%printer} in this case, so it prints only once.
 Finally, the parser print @samp{<>} for any symbol, such as @code{TAGLESS},
-that has no semantic type tag.  @xref{Mfcalc Traces, ,Enabling Debug Traces
+that has no semantic type tag.  See also
-for @code{mfcalc}}, for a complete example.
-
 
 
 @node Expect Decl
@@ -6013,12 +6010,12 @@ Use this @var{type} as semantic value.
 @item Default Value:
 @itemize @minus
 @item
-@code{union-directive} if @code{%union} is used, otherwise @dots{}
+@code{%union} if @code{%union} is used, otherwise @dots{}
 @item
 @code{int} if type tags are used (i.e., @samp{%token <@var{type}>@dots{}} or
-@samp{%type <@var{type}>@dots{}} is used), otherwise @dots{}
+@samp{%token <@var{type}>@dots{}} is used), otherwise @dots{}
 @item
-undefined.
+@code{""}
 @end itemize
 
 @item History:
@@ -6029,30 +6026,6 @@ introduced in Bison 3.0.  Was introduced for Java only in 2.3b as
 @c api.value.type
 
 
-@c ================================================== api.value.union.name
-@deffn Directive {%define api.value.union.name} @var{name}
-@itemize @bullet
-@item Language(s):
-C
-
-@item Purpose:
-The tag of the generated @code{union} (@emph{not} the name of the
-@code{typedef}).  This variable is set to @code{@var{id}} when @samp{%union
-@var{id}} is used.  There is no clear reason to give this union a name.
-
-@item Accepted Values:
-Any valid identifier.
-
-@item Default Value:
-@code{YYSTYPE}.
-
-@item History:
-Introduced in Bison 3.0.3.
-@end itemize
-@end deffn
-@c api.value.type
-
-
 @c ================================================== location_type
 @deffn Directive {%define location_type}
 Obsoleted by @code{api.location.type} since Bison 2.7.
@@ -7549,7 +7522,7 @@ in an associativity related conflict, which can be specified as follows.
 
 The unary-minus is another typical example where associativity is
 usually over-specified, see @ref{Infix Calc, , Infix Notation
-Calculator - @code{calc}}.  The @code{%left} directive is traditionally
+Calculator: @code{calc}}.  The @code{%left} directive is traditionally
 used to declare the precedence of @code{NEG}, which is more than needed
 since it also defines its associativity.  While this is harmless in the
 traditional example, who knows how @code{NEG} might be used in future
@@ -8932,7 +8905,7 @@ clear the flag.
 
 Developing a parser can be a challenge, especially if you don't understand
 the algorithm (@pxref{Algorithm, ,The Bison Parser Algorithm}).  This
-chapter explains how to understand and debug a parser.
+chapter explains how understand and debug a parser.
 
 The first sections focus on the static part of the parser: its structure.
 They explain how to generate and read the detailed description of the
@@ -10092,16 +10065,18 @@ A category can be turned off by prefixing its name with @samp{no-}.  For
 instance, @option{-Wno-yacc} will hide the warnings about
 POSIX Yacc incompatibilities.
 
-@item -Werror
+@item -Werror[=@var{category}]
-Turn enabled warnings for every @var{category} into errors, unless they are
+@itemx -Wno-error[=@var{category}]
-explicitly disabled by @option{-Wno-error=@var{category}}.
+Enable warnings falling in @var{category}, and treat them as errors.  If no
-
+@var{category} is given, it defaults to making all enabled warnings into errors.
-@item -Werror=@var{category}
-Enable warnings falling in @var{category}, and treat them as errors.
 
 @var{category} is the same as for @option{--warnings}, with the exception that
 it may not be prefixed with @samp{no-} (see above).
 
+Prefixed with @samp{no}, it deactivates the error treatment for this
+@var{category}. However, the warning itself won't be disabled, or enabled, by
+this option.
+
 Note that the precedence of the @samp{=} and @samp{,} operators is such that
 the following commands are @emph{not} equivalent, as the first will not treat
 S/R conflicts as errors.
@@ -10111,14 +10086,6 @@ $ bison -Werror=yacc,conflicts-sr input.y
 $ bison -Werror=yacc,error=conflicts-sr input.y
 @end example
 
-@item -Wno-error
-Do not turn enabled warnings for every @var{category} into errors, unless
-they are explicitly enabled by @option{-Werror=@var{category}}.
-
-@item -Wno-error=@var{category}
-Deactivate the error treatment for this @var{category}. However, the warning
-itself won't be disabled, or enabled, by this option.
-
 @item -f [@var{feature}]
 @itemx --feature[=@var{feature}]
 Activate miscellaneous @var{feature}. @var{feature} can be one of:
@@ -10381,23 +10348,9 @@ declare @code{yyerror} as follows:
 int yyerror (char const *);
 @end example
 
-@noindent
+Bison ignores the @code{int} value returned by this @code{yyerror}.
-The @code{int} value returned by this @code{yyerror} is ignored.
+If you use the Yacc library's @code{main} function, your
-
+@code{yyparse} function should have the following type signature:
-The implementation of Yacc library's @code{main} function is:
-
-@example
-int main (void)
-@{
-  setlocale (LC_ALL, "");
-  return yyparse ();
-@}
-@end example
-
-@noindent
-so if you use it, the internationalization support is enabled (e.g., error
-messages are translated), and your @code{yyparse} function should have the
-following type signature:
 
 @example
 int yyparse (void);
@@ -10699,17 +10652,12 @@ The first, inclusive, position of the range, and the first beyond.
 Forwarded to the @code{end} position.
 @end deftypemethod
 
-@deftypemethod  {location} {location} operator+  (int @var{width})
-@deftypemethodx {location} {location} operator+= (int @var{width})
-@deftypemethodx {location} {location} operator-  (int @var{width})
-@deftypemethodx {location} {location} operator-= (int @var{width})
-Various forms of syntactic sugar for @code{columns}.
-@end deftypemethod
-
 @deftypemethod {location} {location} operator+ (const location& @var{end})
-@deftypemethodx {location} {location} operator+= (const location& @var{end})
+@deftypemethodx {location} {location} operator+ (int @var{width})
-Join two locations: starts at the position of the first one, and ends at the
+@deftypemethodx {location} {location} operator+= (int @var{width})
-position of the second.
+@deftypemethodx {location} {location} operator- (int @var{width})
+@deftypemethodx {location} {location} operator-= (int @var{width})
+Various forms of syntactic sugar.
 @end deftypemethod
 
 @deftypemethod {location} {void} step ()
@@ -10747,8 +10695,8 @@ it must be copyable;
 in order to compute the (default) value of @code{@@$} in a reduction, the
 parser basically runs
 @example
-@@$.begin = @@1.begin;
+@@$.begin = @@$1.begin;
-@@$.end   = @@@var{N}.end; // The location of last right-hand side symbol.
+@@$.end   = @@$@var{N}.end; // The location of last right-hand side symbol.
 @end example
 @noindent
 so there must be copyable @code{begin} and @code{end} members;
@@ -10900,12 +10848,12 @@ Regular union-based code in Lex scanner typically look like:
 
 @example
 [0-9]+   @{
-           yylval->ival = text_to_int (yytext);
+           yylval.ival = text_to_int (yytext);
-           return yy::parser::token::INTEGER;
+           return yy::parser::INTEGER;
          @}
 [a-z]+   @{
-           yylval->sval = new std::string (yytext);
+           yylval.sval = new std::string (yytext);
-           return yy::parser::token::IDENTIFIER;
+           return yy::parser::IDENTIFIER;
          @}
 @end example
 
@@ -10914,12 +10862,12 @@ initialized.  So the code would look like:
 
 @example
 [0-9]+   @{
-           yylval->build<int> () = text_to_int (yytext);
+           yylval.build<int>() = text_to_int (yytext);
-           return yy::parser::token::INTEGER;
+           return yy::parser::INTEGER;
          @}
 [a-z]+   @{
-           yylval->build<std::string> () = yytext;
+           yylval.build<std::string> = yytext;
-           return yy::parser::token::IDENTIFIER;
+           return yy::parser::IDENTIFIER;
          @}
 @end example
 
@@ -10928,12 +10876,12 @@ or
 
 @example
 [0-9]+   @{
-           yylval->build (text_to_int (yytext));
+           yylval.build(text_to_int (yytext));
-           return yy::parser::token::INTEGER;
+           return yy::parser::INTEGER;
          @}
 [a-z]+   @{
-           yylval->build (yytext);
+           yylval.build(yytext);
-           return yy::parser::token::IDENTIFIER;
+           return yy::parser::IDENTIFIER;
          @}
 @end example
 
@@ -10961,8 +10909,8 @@ it is still possible to give an integer as semantic value for a string.
 
 So for each token type, Bison generates named constructors as follows.
 
-@deftypemethod {symbol_type} {} {make_@var{token}} (const @var{value_type}& @var{value}, const location_type& @var{location})
+@deftypemethod {symbol_type} {} make_@var{token} (const @var{value_type}& @var{value}, const location_type& @var{location})
-@deftypemethodx {symbol_type} {} {make_@var{token}} (const location_type& @var{location})
+@deftypemethodx {symbol_type} {} make_@var{token} (const location_type& @var{location})
 Build a complete terminal symbol for the token type @var{token} (not
 including the @code{api.token.prefix}) whose possible semantic value is
 @var{value} of adequate @var{value_type}.  If location tracking is enabled,
@@ -10982,18 +10930,20 @@ For instance, given the following declarations:
 Bison generates the following functions:
 
 @example
-symbol_type make_IDENTIFIER (const std::string&, const location_type&);
+symbol_type make_IDENTIFIER(const std::string& v,
-symbol_type make_INTEGER (const int&, const location_type&);
+                            const location_type& l);
-symbol_type make_COLON (const location_type&);
+symbol_type make_INTEGER(const int& v,
+                         const location_type& loc);
+symbol_type make_COLON(const location_type& loc);
 @end example
 
 @noindent
 which should be used in a Lex-scanner as follows.
 
 @example
-[0-9]+   return yy::parser::make_INTEGER (text_to_int (yytext), loc);
+[0-9]+   return yy::parser::make_INTEGER(text_to_int (yytext), loc);
-[a-z]+   return yy::parser::make_IDENTIFIER (yytext, loc);
+[a-z]+   return yy::parser::make_IDENTIFIER(yytext, loc);
-":"      return yy::parser::make_COLON (loc);
+":"      return yy::parser::make_COLON(loc);
 @end example
 
 Tokens that do not have an identifier are not accessible: you cannot simply
@@ -11174,13 +11124,13 @@ calcxx_driver::parse (const std::string &f)
 void
 calcxx_driver::error (const yy::location& l, const std::string& m)
 @{
-  std::cerr << l << ": " << m << '\n';
+  std::cerr << l << ": " << m << std::endl;
 @}
 
 void
 calcxx_driver::error (const std::string& m)
 @{
-  std::cerr << m << '\n';
+  std::cerr << m << std::endl;
 @}
 @end example
 
@@ -11334,7 +11284,7 @@ regular destructors.  All the values are printed using their
 
 @noindent
 The grammar itself is straightforward (@pxref{Location Tracking Calc, ,
-Location Tracking Calculator - @code{ltcalc}}).
+Location Tracking Calculator: @code{ltcalc}}).
 
 @comment file: calc++-parser.yy
 @example
@@ -11458,13 +11408,13 @@ The rules are simple.  The driver is used to report errors.
 
 @comment file: calc++-scanner.ll
 @example
-"-"      return yy::calcxx_parser::make_MINUS  (loc);
+"-"      return yy::calcxx_parser::make_MINUS(loc);
-"+"      return yy::calcxx_parser::make_PLUS   (loc);
+"+"      return yy::calcxx_parser::make_PLUS(loc);
-"*"      return yy::calcxx_parser::make_STAR   (loc);
+"*"      return yy::calcxx_parser::make_STAR(loc);
-"/"      return yy::calcxx_parser::make_SLASH  (loc);
+"/"      return yy::calcxx_parser::make_SLASH(loc);
-"("      return yy::calcxx_parser::make_LPAREN (loc);
+"("      return yy::calcxx_parser::make_LPAREN(loc);
-")"      return yy::calcxx_parser::make_RPAREN (loc);
+")"      return yy::calcxx_parser::make_RPAREN(loc);
-":="     return yy::calcxx_parser::make_ASSIGN (loc);
+":="     return yy::calcxx_parser::make_ASSIGN(loc);
 
 @group
 @{int@}      @{
@@ -11472,12 +11422,12 @@ The rules are simple.  The driver is used to report errors.
   long n = strtol (yytext, NULL, 10);
   if (! (INT_MIN <= n && n <= INT_MAX && errno != ERANGE))
     driver.error (loc, "integer is out of range");
-  return yy::calcxx_parser::make_NUMBER (n, loc);
+  return yy::calcxx_parser::make_NUMBER(n, loc);
 @}
 @end group
-@{id@}       return yy::calcxx_parser::make_IDENTIFIER (yytext, loc);
+@{id@}       return yy::calcxx_parser::make_IDENTIFIER(yytext, loc);
 .          driver.error (loc, "invalid character");
-<<EOF>>    return yy::calcxx_parser::make_END (loc);
+<<EOF>>    return yy::calcxx_parser::make_END(loc);
 %%
 @end example
 
@@ -11533,7 +11483,7 @@ main (int argc, char *argv[])
     else if (argv[i] == std::string ("-s"))
       driver.trace_scanning = true;
     else if (!driver.parse (argv[i]))
-      std::cout << driver.result << '\n';
+      std::cout << driver.result << std::endl;
     else
       res = 1;
   return res;
@@ -13345,7 +13295,7 @@ A reentrant subprogram is a subprogram which can be in invoked any
 number of times in parallel, without interference between the various
 invocations.  @xref{Pure Decl, ,A Pure (Reentrant) Parser}.
 
-@item Reverse Polish Notation
+@item Reverse polish notation
 A language in which all operators are postfix operators.
 
 @item Right recursion

doc/local.mk

@@ -1,5 +1,4 @@
-## Copyright (C) 2001-2003, 2005-2015, 2018 Free Software Foundation,
+## Copyright (C) 2001-2003, 2005-2013 Free Software Foundation, Inc.
-## 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
@@ -86,13 +85,11 @@ doc/refcard.pdf: doc/refcard.tex
 # repeated builds of bison.help.
 
 EXTRA_DIST += $(top_srcdir)/doc/bison.help
-if ! CROSS_COMPILING
 MAINTAINERCLEANFILES += $(top_srcdir)/doc/bison.help
 $(top_srcdir)/doc/bison.help: src/bison$(EXEEXT)
 	$(AM_V_GEN)src/bison$(EXEEXT) --version >doc/bison.help.tmp
 	$(AM_V_at) src/bison$(EXEEXT) --help   >>doc/bison.help.tmp
 	$(AM_V_at)$(top_srcdir)/build-aux/move-if-change doc/bison.help.tmp $@
-endif ! CROSS_COMPILING
 
 
 ## ----------- ##
@@ -109,11 +106,7 @@ remove_time_stamp = \
   sed 's/^\(\.TH[^"]*"[^"]*"[^"]*\)"[^"]*"/\1/'
 
 # Depend on configure to get version number changes.
-if ! CROSS_COMPILING
+$(top_srcdir)/doc/bison.1: doc/bison.help doc/bison.x $(top_srcdir)/configure
-MAN_DEPS = doc/bison.help doc/bison.x $(top_srcdir)/configure
-endif
-
-$(top_srcdir)/doc/bison.1: $(MAN_DEPS)
 	$(AM_V_GEN)$(HELP2MAN)			\
 	    --include=$(top_srcdir)/doc/bison.x	\
 	    --output=$@.t src/bison$(EXEEXT)
@@ -125,15 +118,13 @@ $(top_srcdir)/doc/bison.1: $(MAN_DEPS)
 	fi
 	$(AM_V_at)rm -f $@*.t
 
-if ENABLE_YACC
 nodist_man_MANS = doc/yacc.1
-endif
 
 ## ----------------------------- ##
 ## Graphviz examples generation. ##
 ## ----------------------------- ##
 
-CLEANFILES += $(FIGS_GV:.gv=.eps) $(FIGS_GV:.gv=.pdf) $(FIGS_GV:.gv=.png)
+CLEANDIRS += doc/figs
 FIGS_GV =                                               \
   doc/figs/example.gv                                   \
   doc/figs/example-reduce.gv doc/figs/example-shift.gv

doc/refcard.tex

@@ -19,8 +19,7 @@
 \def\finalout{\overfullrule=0pt}
 %\finalout
 
-% Copyright (c) 1998, 2001, 2009-2015, 2018 Free Software Foundation,
+% Copyright (c) 1998, 2001, 2009-2013 Free Software Foundation, Inc.
-% Inc.
 %
 % This file is part of Bison.
 %

etc/README

@@ -16,7 +16,7 @@ straightforward use of _build/src/bison would.)
 
 --
 
-Copyright (C) 2006, 2009-2015, 2018 Free Software Foundation, Inc.
+Copyright (C) 2006, 2009-2013 Free Software Foundation, Inc.
 
 This file is part of Bison, the GNU Compiler Compiler.
 

etc/bench.pl.in

@@ -1,6 +1,6 @@
 #! /usr/bin/perl -w
 
-# Copyright (C) 2006, 2008-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2008-2013 Free Software Foundation, Inc.
 #
 # This file is part of Bison, the GNU Compiler Compiler.
 #
@@ -738,7 +738,7 @@ yy::parser::token_type yylex(yy::parser::semantic_type* yylvalp,
 void
 yy::parser::error(const yy::parser::location_type& loc, const std::string& msg)
 {
-  std::cerr << loc << ": " << msg << '\n';
+  std::cerr << loc << ": " << msg << std::endl;
 }
 
 int main(int argc, char *argv[])

etc/local.mk

@@ -1,4 +1,4 @@
-## Copyright (C) 2006, 2008-2015, 2018 Free Software Foundation, Inc.
+## Copyright (C) 2006, 2008-2013 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

examples/calc++/calc++.test

@@ -1,6 +1,6 @@
 #! /bin/sh
 
-# Copyright (C) 2005-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2005-2013 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

examples/calc++/local.mk

@@ -1,5 +1,4 @@
-# Copyright (C) 2005-2006, 2008-2015, 2018 Free Software Foundation,
+# Copyright (C) 2005-2006, 2008-2013 Free Software Foundation, Inc.
-# 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 +19,7 @@
 
 # Don't depend on $(BISON) otherwise we would rebuild these files
 # in srcdir, including during distcheck, which is forbidden.
-%D%/calc++-parser.stamp: $(BISON_IN)
+examples/calc++/calc++-parser.stamp: $(BISON_IN)
 SUFFIXES += .yy .stamp
 .yy.stamp:
 	$(AM_V_YACC)rm -f $@
@@ -28,14 +27,14 @@ SUFFIXES += .yy .stamp
 	$(AM_V_at)$(YACCCOMPILE) -o $*.cc $<
 	$(AM_V_at)mv -f $@.tmp $@
 
-$(calcxx_sources_generated): %D%/calc++-parser.stamp
+$(calc_sources_generated): examples/calc++/calc++-parser.stamp
-	@test -f $@ || rm -f %D%/calc++-parser.stamp
+	@test -f $@ || rm -f examples/calc++/calc++-parser.stamp
-	@test -f $@ || $(MAKE) $(AM_MAKEFLAGS) %D%/calc++-parser.stamp
+	@test -f $@ || $(MAKE) $(AM_MAKEFLAGS) examples/calc++/calc++-parser.stamp
 CLEANFILES +=                                   \
-  $(calcxx_sources_generated)                   \
+  $(calc_sources_generated)                     \
-  %D%/calc++-parser.output                      \
+  examples/calc++/calc++-parser.output          \
-  %D%/calc++-parser.stamp                       \
+  examples/calc++/calc++-parser.stamp           \
-  %D%/calc++-scanner.cc
+  examples/calc++/calc++-scanner.cc
 
 
 ## -------------------- ##
@@ -43,43 +42,35 @@ CLEANFILES +=                                   \
 ## -------------------- ##
 
 # Avoid using BUILT_SOURCES which is too global.
-$(%C%_calc___OBJECTS): $(calcxx_sources_generated)
+$(examples_calc___calc___OBJECTS): $(calc_sources_generated)
 
-calcxx_sources_extracted =                      \
+calc_sources_extracted =                        \
-  %D%/calc++-driver.cc                          \
+  examples/calc++/calc++-driver.cc              \
-  %D%/calc++-driver.hh                          \
+  examples/calc++/calc++-driver.hh              \
-  %D%/calc++-scanner.ll                         \
+  examples/calc++/calc++-scanner.ll             \
-  %D%/calc++.cc
+  examples/calc++/calc++.cc
-calcxx_extracted =                              \
+calc_extracted =                                \
-  $(calcxx_sources_extracted)                   \
+  $(calc_sources_extracted)                     \
-  %D%/calc++-parser.yy
+  examples/calc++/calc++-parser.yy
-extracted += $(calcxx_extracted)
+extracted += $(calc_extracted)
-calcxx_sources_generated =                      \
+calc_sources_generated =                        \
-  %D%/calc++-parser.cc                          \
+  examples/calc++/calc++-parser.cc              \
-  %D%/calc++-parser.hh                          \
+  examples/calc++/calc++-parser.hh              \
-  %D%/location.hh                               \
+  examples/calc++/location.hh                   \
-  %D%/position.hh                               \
+  examples/calc++/position.hh                   \
-  %D%/stack.hh
+  examples/calc++/stack.hh
-calcxx_sources =                                \
+calc_sources =                                  \
-  $(calcxx_sources_extracted)                   \
+  $(calc_sources_extracted)                     \
-  $(calcxx_sources_generated)
+  $(calc_sources_generated)
 
-if FLEX_CXX_WORKS
+if BISON_CXX_WORKS
-check_PROGRAMS += %D%/calc++
+check_PROGRAMS += examples/calc++/calc++
-nodist_%C%_calc___SOURCES =                     \
+nodist_examples_calc___calc___SOURCES =         \
-  $(calcxx_sources)
+  $(calc_sources)
 
-%C%_calc___CPPFLAGS = -I$(top_builddir)/%D%
+examples_calc___calc___CPPFLAGS = -I$(top_builddir)/examples/calc++
-%C%_calc___CXXFLAGS = $(AM_CXXFLAGS) $(FLEX_SCANNER_CXXFLAGS)
+examples_calc___calc___CXXFLAGS = $(AM_CXXFLAGS) $(FLEX_SCANNER_CXXFLAGS)
-dist_TESTS += %D%/calc++.test
+dist_TESTS += examples/calc++/calc++.test
 else
-EXTRA_DIST += %D%/calc++.test
+EXTRA_DIST += examples/calc++/calc++.test
 endif
-
-
-## ------------ ##
-## Installing.  ##
-## ------------ ##
-
-calcxxdir = $(docdir)/examples/calc++
-calcxx_DATA = $(calcxx_extracted)

examples/extexi

@@ -3,8 +3,8 @@
 
 # This file is part of GNU Bison
 
-# Copyright (C) 1992, 2000-2001, 2005-2006, 2009-2015, 2018 Free
+# Copyright (C) 1992, 2000-2001, 2005-2006, 2009-2013 Free Software
-# Software Foundation, Inc.
+# 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
@@ -19,7 +19,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-# Usage: extexi [OPTION...] input-file.texi ... -- [FILES to extract]
+# Usage: extexi input-file.texi ... -- [FILES to extract]
 
 # Look for @example environments preceded with lines such as:
 #
@@ -35,9 +35,6 @@
 
 use strict;
 
-# Whether we generate synclines.
-my $synclines = 0;
-
 # normalize($block)
 # -----------------
 # Remove Texinfo mark up.
@@ -105,7 +102,7 @@ sub process ($)
             {
               # Bison supports synclines, but not Flex.
               $input .= sprintf ("#line %s \"$in\"\n", $. + 1)
-                if $synclines && $file =~ /\.[chy]*$/;
+                if $file =~ /\.[chy]*$/;
               next;
             }
           elsif (/^\@end (small)?example$/)
@@ -139,18 +136,14 @@ my @input;
 my $seen_dash = 0;
 for my $arg (@ARGV)
 {
-  if ($seen_dash)
+  if ($arg eq '--')
-    {
-      use File::Basename;
-      $file_wanted{basename($arg)} = $arg;
-    }
-  elsif ($arg eq '--')
     {
       $seen_dash = 1;
     }
-  elsif ($arg eq '--synclines')
+  elsif ($seen_dash)
     {
-      $synclines = 1;
+      use File::Basename;
+      $file_wanted{basename($arg)} = $arg;
     }
   else
     {

examples/local.mk

@@ -1,4 +1,4 @@
-# Copyright (C) 2005, 2008-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2005, 2008-2013 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
@@ -13,8 +13,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-dist_noinst_SCRIPTS = %D%/extexi %D%/test
+dist_noinst_SCRIPTS = examples/extexi examples/test
-TEST_LOG_COMPILER = $(top_srcdir)/%D%/test
+TEST_LOG_COMPILER = $(top_srcdir)/examples/test
 
 AM_CXXFLAGS =							\
   $(WARN_CXXFLAGS) $(WARN_CXXFLAGS_TEST) $(WERROR_CXXFLAGS)
@@ -24,23 +24,20 @@ AM_CXXFLAGS =							\
 ## ------------ ##
 
 doc = $(top_srcdir)/doc/bison.texi
-extexi = $(top_srcdir)/%D%/extexi
+extexi = $(top_srcdir)/examples/extexi
-if ENABLE_GCC_WARNINGS
+extract = VERSION="$(VERSION)" $(PERL) -f $(extexi) $(doc) --
-extexiFLAGS = --synclines
-endif
-extract = VERSION="$(VERSION)" $(PERL) $(extexi) $(extexiFLAGS) $(doc) --
 extracted =
-CLEANFILES += $(extracted) %D%/extracted.stamp
+CLEANFILES += $(extracted) examples/extracted.stamp
-%D%/extracted.stamp: $(doc) $(extexi)
+examples/extracted.stamp: $(doc) $(extexi)
 	$(AM_V_GEN)rm -f $@ $@.tmp
 	$(AM_V_at)touch $@.tmp
 	$(AM_V_at)$(extract) $(extracted)
 	$(AM_V_at)mv $@.tmp $@
 
-$(extracted): %D%/extracted.stamp
+$(extracted): examples/extracted.stamp
-	@test -f $@ || rm -f %D%/extracted.stamp
+	@test -f $@ || rm -f examples/extracted.stamp
-	@test -f $@ || $(MAKE) $(AM_MAKEFLAGS) %D%/extracted.stamp
+	@test -f $@ || $(MAKE) $(AM_MAKEFLAGS) examples/extracted.stamp
 
-include %D%/calc++/local.mk
+include examples/calc++/local.mk
-include %D%/mfcalc/local.mk
+include examples/mfcalc/local.mk
-include %D%/rpcalc/local.mk
+include examples/rpcalc/local.mk

examples/mfcalc/local.mk

@@ -1,5 +1,4 @@
-# Copyright (C) 2005-2006, 2008-2015, 2018 Free Software Foundation,
+# Copyright (C) 2005-2006, 2008-2013 Free Software Foundation, Inc.
-# 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
@@ -19,22 +18,19 @@
 ## -------------------- ##
 
 BUILT_SOURCES += $(mfcalc_sources)
-CLEANFILES +=  %D%/mfcalc.[ch] %D%/mfcalc.output
+CLEANFILES +=  examples/mfcalc/mfcalc.[ch] examples/mfcalc/mfcalc.output
 
-mfcalc_extracted = %D%/calc.h %D%/mfcalc.y
+mfcalc_extracted =				\
-mfcalc_sources = $(mfcalc_extracted)
+  examples/mfcalc/calc.h			\
+  examples/mfcalc/mfcalc.y
+mfcalc_sources =				\
+  $(mfcalc_extracted)
 extracted += $(mfcalc_extracted)
 
-check_PROGRAMS += %D%/mfcalc
+check_PROGRAMS += examples/mfcalc/mfcalc
-%C%_mfcalc_LDADD = -lm
+examples_mfcalc_mfcalc_LDADD = -lm
-nodist_%C%_mfcalc_SOURCES = $(mfcalc_sources)
+nodist_examples_mfcalc_mfcalc_SOURCES =		\
+  $(mfcalc_sources)
 
-%C%_mfcalc_CPPFLAGS = -I$(top_builddir)/%D%
+examples_mfcalc_mfcalc_CPPFLAGS = -I$(top_builddir)/examples/mfcalc
-dist_TESTS += %D%/mfcalc.test
+dist_TESTS += examples/mfcalc/mfcalc.test
-
-## ------------ ##
-## Installing.  ##
-## ------------ ##
-
-mfcalcdir = $(docdir)/examples/mfcalc
-mfcalc_DATA = $(mfcalc_extracted)

examples/mfcalc/mfcalc.test

@@ -1,6 +1,6 @@
 #! /bin/sh
 
-# Copyright (C) 2005-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2005-2013 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

examples/rpcalc/.gitignore

@@ -1,5 +1,4 @@
 /calc.h
-/rpcalc
 /rpcalc.c
 /rpcalc.h
 /rpcalc.output

examples/rpcalc/local.mk

@@ -1,5 +1,4 @@
-# Copyright (C) 2005-2006, 2008-2015, 2018 Free Software Foundation,
+# Copyright (C) 2005-2006, 2008-2013 Free Software Foundation, Inc.
-# 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
@@ -19,22 +18,18 @@
 ## -------------------- ##
 
 BUILT_SOURCES += $(rpcalc_sources)
-CLEANFILES +=  %D%/rpcalc.[ch] %D%/rpcalc.output
+CLEANFILES +=  examples/rpcalc/rpcalc.[ch] examples/rpcalc/rpcalc.output
 
-rpcalc_extracted = %D%/rpcalc.y
+rpcalc_extracted =				\
-rpcalc_sources = $(rpcalc_extracted)
+  examples/rpcalc/rpcalc.y
+rpcalc_sources =				\
+  $(rpcalc_extracted)
 extracted += $(rpcalc_extracted)
 
-check_PROGRAMS += %D%/rpcalc
+check_PROGRAMS += examples/rpcalc/rpcalc
-%C%_rpcalc_LDADD = -lm
+examples_rpcalc_rpcalc_LDADD = -lm
-nodist_%C%_rpcalc_SOURCES = $(rpcalc_sources)
+nodist_examples_rpcalc_rpcalc_SOURCES =		\
+  $(rpcalc_sources)
 
-%C%_rpcalc_CPPFLAGS = -I$(top_builddir)/%D%
+examples_rpcalc_rpcalc_CPPFLAGS = -I$(top_builddir)/examples/rpcalc
-dist_TESTS += %D%/rpcalc.test
+dist_TESTS += examples/rpcalc/rpcalc.test
-
-## ------------ ##
-## Installing.  ##
-## ------------ ##
-
-rpcalcdir = $(docdir)/examples/rpcalc
-rpcalc_DATA = $(rpcalc_extracted)

examples/rpcalc/rpcalc.test

@@ -1,6 +1,6 @@
 #! /bin/sh
 
-# Copyright (C) 2005-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2005-2013 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

examples/test

@@ -1,6 +1,6 @@
 #! /bin/sh
 
-# Copyright (C) 2005-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2005-2013 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

examples/variant.yy

@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2008-2015, 2018 Free Software Foundation, Inc.
+  Copyright (C) 2008-2013 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 @@
 */
 
 %debug
-%language "c++"
+%skeleton "lalr1.cc"
 %defines
 %define api.token.constructor
 %define api.value.type variant
@@ -25,9 +25,9 @@
 
 %code requires // *.hh
 {
+#include <list>
 #include <string>
-#include <vector>
+typedef std::list<std::string> strings_type;
-typedef std::vector<std::string> strings_type;
 }
 
 %code // *.cc
@@ -43,27 +43,22 @@ typedef std::vector<std::string> strings_type;
     static parser::symbol_type yylex ();
   }
 
-  // Printing a vector of strings.
+  // Printing a list of strings.
-  // Koening look up will look into std, since that's an std::vector.
+  // Koening look up will look into std, since that's an std::list.
   namespace std
   {
     std::ostream&
-    operator<< (std::ostream& o, const strings_type& ss)
+    operator<< (std::ostream& o, const strings_type& s)
     {
-      o << '(' << &ss << ") {";
+      std::copy (s.begin (), s.end (),
-      const char *sep = "";
+                 std::ostream_iterator<strings_type::value_type> (o, "\n"));
-      for (strings_type::const_iterator i = ss.begin(), end = ss.end();
+      return o;
-           i != end; ++i)
-        {
-          o << sep << *i;
-          sep = ", ";
-        }
-      return o << '}';
     }
   }
 
   // Conversion to string.
   template <typename T>
+    inline
     std::string
     string_cast (const T& t)
   {
@@ -79,12 +74,12 @@ typedef std::vector<std::string> strings_type;
 %token END_OF_FILE 0;
 
 %type <::std::string> item;
-%type <::std::vector<std::string>> list;
+%type <::std::list<std::string>> list;
 
 %%
 
 result:
-  list  { std::cout << $1 << '\n'; }
+  list  { std::cout << $1 << std::endl; }
 ;
 
 list:
@@ -134,7 +129,7 @@ namespace yy
   void
   parser::error (const parser::location_type& loc, const std::string& msg)
   {
-    std::cerr << loc << ": " << msg << '\n';
+    std::cerr << loc << ": " << msg << std::endl;
   }
 }
 

lib/.gitignore

@@ -4,7 +4,8 @@
 /*~
 /.deps
 /.dirstamp
-/_Noreturn.h
+/Makefile
+/Makefile.in
 /alignof.h
 /alloca.h
 /alloca.in.h
@@ -14,9 +15,7 @@
 /asnprintf.c
 /basename-lgpl.c
 /basename.c
-/binary-io.c
 /binary-io.h
-/bitrotate.c
 /bitrotate.h
 /c++defs.h
 /c-ctype.c
@@ -29,6 +28,8 @@
 /charset.alias
 /cloexec.c
 /cloexec.h
+/close-hook.c
+/close-hook.h
 /close-stream.c
 /close-stream.h
 /close.c
@@ -55,6 +56,7 @@
 /exitfail.h
 /fatal-signal.c
 /fatal-signal.h
+/fclose.c
 /fcntl.c
 /fcntl.h
 /fcntl.in.h
@@ -79,27 +81,19 @@
 /fseterr.h
 /fstat.c
 /getdtablesize.c
-/getopt-cdefs.in.h
-/getopt-core.h
-/getopt-ext.h
-/getopt-pfx-core.h
-/getopt-pfx-ext.h
 /getopt.c
 /getopt.h
 /getopt.in.h
 /getopt1.c
 /getopt_int.h
-/getprogname.c
-/getprogname.h
 /gettext.h
 /gnulib.mk
-/hard-locale.c
-/hard-locale.h
 /hash.c
 /hash.h
 /intprops.h
 /inttypes.h
 /inttypes.in.h
+/ioctl.c
 /isnan.c
 /isnand-nolibm.h
 /isnand.c
@@ -109,15 +103,9 @@
 /isnanl.c
 /itold.c
 /ldexpl.c
-/limits.h
-/limits.in.h
 /localcharset.c
 /localcharset.h
-/lstat.c
 /malloc.c
-/malloca.c
-/malloca.h
-/math.c
 /math.h
 /math.in.h
 /mbrtowc.c
@@ -126,11 +114,12 @@
 /mbswidth.h
 /memchr.c
 /memchr.valgrind
-/minmax.h
 /msvc-inval.c
 /msvc-inval.h
 /msvc-nothrow.c
 /msvc-nothrow.h
+/nonblocking.c
+/nonblocking.h
 /obstack.c
 /obstack.h
 /obstack_printf.c
@@ -151,6 +140,7 @@
 /printf.c
 /progname.c
 /progname.h
+/quote.c
 /quote.h
 /quotearg.c
 /quotearg.h
@@ -164,7 +154,6 @@
 /ref-del.sin
 /sched.h
 /sched.in.h
-/sig-handler.c
 /sig-handler.h
 /sigaction.c
 /signal.h
@@ -193,8 +182,6 @@
 /spawnp.c
 /sprintf.c
 /stamp-h1
-/stat-w32.c
-/stat-w32.h
 /stat.c
 /stdbool.h
 /stdbool.in.h
@@ -205,6 +192,7 @@
 /stdio--.h
 /stdio-impl.h
 /stdio-safer.h
+/stdio-write.c
 /stdio.h
 /stdio.in.h
 /stdlib.h
@@ -223,19 +211,24 @@
 /stripslash.c
 /strndup.c
 /strnlen.c
+/strtol.c
+/strtoul.c
 /strverscmp.c
 /sys
+/sys_ioctl.h
 /sys_ioctl.in.h
+/sys_socket.h
 /sys_socket.in.h
+/sys_stat.h
 /sys_stat.in.h
 /sys_types.in.h
+/sys_wait.h
 /sys_wait.in.h
 /sysexits.in.h
 /time.h
 /time.in.h
 /unistd--.h
 /unistd-safer.h
-/unistd.c
 /unistd.h
 /unistd.in.h
 /unitypes.h
@@ -243,7 +236,6 @@
 /uniwidth
 /uniwidth.h
 /uniwidth.in.h
-/unlink.c
 /unlocked-io.h
 /unsetenv.c
 /vasnprintf.c
@@ -252,6 +244,7 @@
 /vfprintf.c
 /vsnprintf.c
 /vsprintf.c
+/w32sock.h
 /w32spawn.h
 /wait-process.c
 /wait-process.h
@@ -259,7 +252,6 @@
 /warn-on-use.h
 /wchar.h
 /wchar.in.h
-/wctype-h.c
 /wctype.h
 /wctype.in.h
 /wcwidth.c
@@ -270,9 +262,13 @@
 /xmalloc.c
 /xmemdup0.c
 /xmemdup0.h
-/xsize.c
 /xsize.h
 /xstrndup.c
 /xstrndup.h
-/stat-time.c
+/binary-io.c
-/stat-time.h
+/xsize.c
+/bitrotate.c
+/math.c
+/sig-handler.c
+/unistd.c
+/wctype-h.c

lib/abitset.c

@@ -1,7 +1,7 @@
 /* Array bitsets.
 
-   Copyright (C) 2002-2003, 2006, 2009-2015, 2018 Free Software
+   Copyright (C) 2002-2003, 2006, 2009-2013 Free Software Foundation,
-   Foundation, Inc.
+   Inc.
 
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 

lib/abitset.h

@@ -1,7 +1,6 @@
 /* Functions to support abitsets.
 
-   Copyright (C) 2002, 2004, 2009-2015, 2018 Free Software Foundation,
+   Copyright (C) 2002, 2004, 2009-2013 Free Software Foundation, Inc.
-   Inc.
 
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 

lib/bbitset.h

@@ -1,7 +1,7 @@
 /* Base bitset stuff.
 
-   Copyright (C) 2002-2004, 2006, 2009-2015, 2018 Free Software
+   Copyright (C) 2002-2004, 2006, 2009-2013 Free Software Foundation,
-   Foundation, Inc.
+   Inc.
 
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 

lib/bitset.c

@@ -1,7 +1,6 @@
 /* General bitsets.
 
-   Copyright (C) 2002-2006, 2009-2015, 2018 Free Software Foundation,
+   Copyright (C) 2002-2006, 2009-2013 Free Software Foundation, Inc.
-   Inc.
 
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 

lib/bitset.h

@@ -1,7 +1,6 @@
 /* Generic bitsets.
 
-   Copyright (C) 2002-2004, 2009-2015, 2018 Free Software Foundation,
+   Copyright (C) 2002-2004, 2009-2013 Free Software Foundation, Inc.
-   Inc.
 
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 

lib/bitset_stats.c

@@ -1,7 +1,6 @@
 /* Bitset statistics.
 
-   Copyright (C) 2002-2006, 2009-2015, 2018 Free Software Foundation,
+   Copyright (C) 2002-2006, 2009-2013 Free Software Foundation, Inc.
-   Inc.
 
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 

lib/bitset_stats.h

@@ -1,7 +1,6 @@
 /* Functions to support bitset statistics.
 
-   Copyright (C) 2002-2004, 2009-2015, 2018 Free Software Foundation,
+   Copyright (C) 2002-2004, 2009-2013 Free Software Foundation, Inc.
-   Inc.
 
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 

lib/bitsetv-print.c

@@ -1,6 +1,6 @@
 /* Bitset vectors.
 
-   Copyright (C) 2001-2002, 2004, 2006, 2009-2015, 2018 Free Software
+   Copyright (C) 2001-2002, 2004, 2006, 2009-2013 Free Software
    Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify

lib/bitsetv-print.h

@@ -1,7 +1,6 @@
 /* Bitset vectors.
 
-   Copyright (C) 2002, 2004, 2009-2015, 2018 Free Software Foundation,
+   Copyright (C) 2002, 2004, 2009-2013 Free Software Foundation, Inc.
-   Inc.
 
    Contributed by Akim Demaille (akim@freefriends.org).
 

lib/bitsetv.c

@@ -1,6 +1,6 @@
 /* Bitset vectors.
 
-   Copyright (C) 2001-2002, 2004-2006, 2009-2015, 2018 Free Software
+   Copyright (C) 2001-2002, 2004-2006, 2009-2013 Free Software
    Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify

lib/bitsetv.h

@@ -1,7 +1,6 @@
 /* Bitset vectors.
 
-   Copyright (C) 2002, 2004, 2009-2015, 2018 Free Software Foundation,
+   Copyright (C) 2002, 2004, 2009-2013 Free Software Foundation, Inc.
-   Inc.
 
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 

lib/ebitset.c

@@ -1,7 +1,6 @@
 /* Functions to support expandable bitsets.
 
-   Copyright (C) 2002-2006, 2009-2015, 2018 Free Software Foundation,
+   Copyright (C) 2002-2006, 2009-2013 Free Software Foundation, Inc.
-   Inc.
 
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 

lib/ebitset.h

@@ -1,7 +1,6 @@
 /* Functions to support ebitsets.
 
-   Copyright (C) 2002, 2004, 2009-2015, 2018 Free Software Foundation,
+   Copyright (C) 2002, 2004, 2009-2013 Free Software Foundation, Inc.
-   Inc.
 
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 

lib/get-errno.c

@@ -1,7 +1,6 @@
 /* get-errno.c - get and set errno.
 
-   Copyright (C) 2002, 2006, 2009-2015, 2018 Free Software Foundation,
+   Copyright (C) 2002, 2006, 2009-2013 Free Software Foundation, Inc.
-   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

lib/get-errno.h

@@ -1,6 +1,6 @@
 /* get-errno.h - get and set errno.
 
-   Copyright (C) 2002, 2009-2015, 2018 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2009-2013 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

lib/lbitset.c

@@ -1,7 +1,7 @@
 /* Functions to support link list bitsets.
 
-   Copyright (C) 2002-2004, 2006, 2009-2015, 2018 Free Software
+   Copyright (C) 2002-2004, 2006, 2009-2013 Free Software Foundation,
-   Foundation, Inc.
+   Inc.
 
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 

lib/lbitset.h

@@ -1,7 +1,6 @@
 /* Functions to support lbitsets.
 
-   Copyright (C) 2002, 2004, 2009-2015, 2018 Free Software Foundation,
+   Copyright (C) 2002, 2004, 2009-2013 Free Software Foundation, Inc.
-   Inc.
 
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 

lib/libiberty.h

@@ -1,7 +1,6 @@
 /* Fake libiberty.h for Bison.
 
-   Copyright (C) 2002-2004, 2009-2015, 2018 Free Software Foundation,
+   Copyright (C) 2002-2004, 2009-2013 Free Software Foundation, Inc.
-   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

lib/local.mk

@@ -1,4 +1,4 @@
-# Copyright (C) 2001-2015, 2018 Free Software Foundation, Inc.
+# Copyright (C) 2001-2013 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
@@ -51,8 +51,6 @@ lib_libbison_a_SOURCES +=                       \
   lib/get-errno.c
 
 # The Yacc compatibility library.
-if ENABLE_YACC
+lib_LIBRARIES = $(YACC_LIBRARY)
-lib_LIBRARIES = lib/liby.a
 EXTRA_LIBRARIES = lib/liby.a
 lib_liby_a_SOURCES = lib/main.c lib/yyerror.c
-endif

lib/main.c

@@ -1,6 +1,6 @@
 /* Yacc library main function.
 
-   Copyright (C) 2002, 2009-2015, 2018 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2009-2013 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 

lib/timevar.c

@@ -1,6 +1,6 @@
 /* Timing variables for measuring compiler performance.
 
-   Copyright (C) 2000, 2002, 2004, 2006, 2009-2015, 2018 Free Software
+   Copyright (C) 2000, 2002, 2004, 2006, 2009-2013 Free Software
    Foundation, Inc.
 
    Contributed by Alex Samuel <samuel@codesourcery.com>