b4_yaxx macro enables saving parsing trees into XML, tested on 1.875-3.0.4, see https://github.com/yijunyu/yaxx

Merge remote-tracking branch 'origin/maint'
* origin/maint: maint: post-release administrivia version 3.0.4 gnulib: update build: re-enable compiler warnings, and fix them tests: c++: fix a C++03 conformance issue tests: fix a title c++: reserve 200 slots in the parser's stack tests: be more robust to unrecognized synclines, and try to recognize xlc tests: fix C++ conformance build: fix some warnings build: avoid infinite recursions on include_next
2026-08-08 18:25:13 +00:00 · 2017-03-11 17:33:40 +00:00 · 2015-01-23 15:17:35 +01:00 · 2015-01-23 14:13:40 +01:00 · 2015-01-23 13:53:53 +01:00 · 2015-01-23 11:27:10 +01:00
207 changed files with 3874 additions and 2338 deletions
@@ -1 +1 @@
-3.0
+3.0.4
@@ -24,7 +24,7 @@ and nasty bugs.

 -----

-Copyright (C) 1998-2013 Free Software Foundation, Inc.
+Copyright (C) 1998-2015 Free Software Foundation, Inc.

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

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

 	-----

-	Copyright (C) 1987-1988, 1991-2013 Free Software Foundation,
+	Copyright (C) 1987-1988, 1991-2015 Free Software Foundation,
 	Inc.

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

-# Copyright (C) 2001-2013 Free Software Foundation, Inc.
+# Copyright (C) 2001-2015 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
@@ -24,8 +24,10 @@ SUBDIRS = po runtime-po .
 aclocaldir = @aclocaldir@
 aclocal_DATA = m4/bison-i18n.m4

-EXTRA_DIST = .prev-version .version \
-  cfg.mk ChangeLog-1998 ChangeLog-2012 PACKAGING
+EXTRA_DIST = .prev-version .version cfg.mk PACKAGING \
+  ChangeLog-1998 ChangeLog-2012 ChangeLog
+
+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
@@ -37,8 +39,9 @@ AM_YFLAGS = -d -v -Werror -Wall -Wno-yacc --report=all

 # Initialization before completion by local.mk's.
 AM_CFLAGS = $(WARN_CFLAGS)
-# Find builddir/src/scan-code.c etc.
-AM_CPPFLAGS = -I. -Ilib -I$(top_srcdir) -I$(top_srcdir)/lib
+# Find builddir/src/scan-code.c etc.  For some reason "-I./lib"
+# instead of "-Ilib" avoids infinite recursions on #include_next.
+AM_CPPFLAGS = -I. -I./lib -I$(top_srcdir) -I$(top_srcdir)/lib
 BUILT_SOURCES =
 CLEANFILES =
 DISTCLEANFILES =
@@ -1,5 +1,142 @@
 GNU Bison NEWS

+* Noteworthy changes in release ?.? (????-??-??) [?]
+
+** Diagnostics about useless rules
+
+  In the following grammar, the 'exp' nonterminal is trivially useless.  So,
+  of course, its rules are useless too.
+
+    %%
+    input: '0' | exp
+    exp: exp '+' exp | exp '-' exp | '(' exp ')'
+
+  Previously all the useless rules were reported, including those whose
+  left-hand side is the 'exp' nonterminal:
+
+    warning: 1 nonterminal useless in grammar [-Wother]
+    warning: 4 rules useless in grammar [-Wother]
+    2.14-16: warning: nonterminal useless in grammar: exp [-Wother]
+     input: '0' | exp
+                  ^^^
+    2.14-16: warning: rule useless in grammar [-Wother]
+     input: '0' | exp
+                  ^^^
+    3.6-16: warning: rule useless in grammar [-Wother]
+     exp: exp '+' exp | exp '-' exp | '(' exp ')'
+          ^^^^^^^^^^^
+    3.20-30: warning: rule useless in grammar [-Wother]
+     exp: exp '+' exp | exp '-' exp | '(' exp ')'
+                        ^^^^^^^^^^^
+    3.34-44: warning: rule useless in grammar [-Wother]
+     exp: exp '+' exp | exp '-' exp | '(' exp ')'
+                                      ^^^^^^^^^^^
+
+  Now, rules whose left-hand side symbol is useless are no longer reported
+  as useless.  The locations of the errors have also been adjusted to point
+  to the first use of the nonterminal as a left-hand side of a rule:
+
+    warning: 1 nonterminal useless in grammar [-Wother]
+    warning: 4 rules useless in grammar [-Wother]
+    3.1-3: warning: nonterminal useless in grammar: exp [-Wother]
+     exp: exp '+' exp | exp '-' exp | '(' exp ')'
+     ^^^
+    2.14-16: warning: rule useless in grammar [-Wother]
+     input: '0' | exp
+                  ^^^
+
+* 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
@@ -2656,7 +2793,7 @@ Output file does not redefine const for C++.

 -----

-Copyright (C) 1995-2013 Free Software Foundation, Inc.
+Copyright (C) 1995-2015 Free Software Foundation, Inc.

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

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

 -----

-Copyright (C) 2002, 2005, 2009-2013 Free Software Foundation, Inc.
+Copyright (C) 2002, 2005, 2009-2015 Free Software Foundation, Inc.

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

@@ -44,7 +44,7 @@ End:

 -----

-Copyright (C) 1992, 1998-1999, 2003-2005, 2008-2013 Free Software
+Copyright (C) 1992, 1998-1999, 2003-2005, 2008-2015 Free Software
 Foundation, Inc.

 This file is part of Bison, the GNU Compiler Compiler.
@@ -12,7 +12,7 @@ the problems you encounter.

 -----

-Copyright (C) 2002, 2004, 2009-2013 Free Software Foundation, Inc.
+Copyright (C) 2002, 2004, 2009-2015 Free Software Foundation, Inc.

 This file is part of GNU Bison.

@@ -103,15 +103,17 @@ 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.
+Git submodule support is weak before versions 1.6 and later, upgrade Git if
+your version is older.

 The next step is to get other files needed to build, which are
 extracted from other source packages:

        $ ./bootstrap

-And there you are!  Just
+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
@@ -449,7 +451,7 @@ Push these changes.

 -----

-Copyright (C) 2002-2005, 2007-2013 Free Software Foundation, Inc.
+Copyright (C) 2002-2005, 2007-2015 Free Software Foundation, Inc.

 This file is part of GNU Bison.

@@ -1,7 +1,8 @@
 Bison was originally written by Robert Corbett.  It would not be what
 it is today without the invaluable help of these people:

-Аскар Сафин              [email protected]
+Aaro Koskinen             [email protected]
+Аскар Сафин               [email protected]
 Airy Andre                [email protected]
 Akim Demaille             [email protected]
 Albert Chin-A-Young       [email protected]
@@ -11,11 +12,13 @@ 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]
 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]
@@ -63,12 +66,13 @@ 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]
-Ken Moffat                [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]
@@ -80,15 +84,19 @@ 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]
 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]
@@ -96,6 +104,7 @@ 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]
@@ -105,17 +114,19 @@ 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]
@@ -123,13 +134,16 @@ 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]
@@ -145,6 +159,7 @@ 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
@@ -157,7 +172,7 @@ End:

 -----

-Copyright (C) 2000-2013 Free Software Foundation, Inc.
+Copyright (C) 2000-2015 Free Software Foundation, Inc.

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

@@ -369,7 +369,7 @@ End:

 -----

-Copyright (C) 2001-2004, 2006, 2008-2013 Free Software Foundation, Inc.
+Copyright (C) 2001-2004, 2006, 2008-2015 Free Software Foundation, Inc.

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

@@ -1,10 +1,10 @@
 #! /bin/sh
 # Print a version string.
-scriptversion=2013-08-15.22; # UTC
+scriptversion=2014-12-08.12; # UTC

 # Bootstrap this package from checked-out sources.

-# Copyright (C) 2003-2013 Free Software Foundation, Inc.
+# Copyright (C) 2003-2015 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
@@ -42,6 +42,9 @@ export LC_ALL

 local_gl_dir=gl

+# Honour $PERL, but work even if there is none
+PERL="${PERL-perl}"
+
 me=$0

 usage() {
@@ -210,7 +213,17 @@ bootstrap_sync=false
 use_git=true

 check_exists() {
-  ($1 --version </dev/null) >/dev/null 2>&1
+  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
 }

@@ -408,7 +421,7 @@ sort_ver() { # sort -V is not generally available
 get_version() {
  app=$1

-  $app --version >/dev/null 2>&1 || return 1
+  $app --version >/dev/null 2>&1 || { $app --version; return 1; }

  $app --version 2>&1 |
  sed -n '# Move version to start of line.
@@ -446,6 +459,7 @@ check_versions() {
    test "$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

@@ -463,11 +477,22 @@ 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 $app; then
+      if ! check_exists --verbose $app; then
        warn_ "Error: '$app' not found"
        ret=1
      fi
@@ -551,6 +576,14 @@ 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.
@@ -590,8 +623,8 @@ 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 $?
+    git submodule init -- "$gnulib_path" || exit $?
+    git submodule update -- "$gnulib_path" || exit $?

  elif [ ! -d "$gnulib_path" ]; then
    echo "$0: getting gnulib files..."
@@ -620,13 +653,14 @@ case ${GNULIB_SRCDIR--} in
      # This fallback allows at least git 1.5.5.
      if test -f "$gnulib_path"/gnulib-tool; then
        # Since file already exists, assume submodule init already complete.
-        git submodule update || exit $?
+        git submodule update -- "$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)" "$gnulib_path" \
-          && git submodule init && git submodule update \
+          && git submodule init -- "$gnulib_path" \
+          && git submodule update -- "$gnulib_path" \
          || exit $?
      fi
    fi
@@ -1,6 +1,6 @@
 # Bootstrap configuration.

-# Copyright (C) 2006-2013 Free Software Foundation, Inc.
+# Copyright (C) 2006-2015 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
@@ -33,8 +33,9 @@ gnulib_modules='
  quote quotearg
  readme-release
  realloc-posix
-  spawn-pipe stdbool stpcpy strdup-posix strerror strtoul strverscmp
-  unistd unistd-safer unlocked-io update-copyright unsetenv verify
+  spawn-pipe stdbool stpcpy strdup-posix strerror strverscmp
+  unistd unistd-safer unlink unlocked-io
+  update-copyright unsetenv verify
  warnings
  xalloc
  xalloc-die
@@ -1,4 +1,4 @@
-# Copyright (C) 2012-2013 Free Software Foundation, Inc.
+# Copyright (C) 2012-2015 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -2,6 +2,9 @@
 # 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/;
@@ -1,4 +1,4 @@
-# Copyright (C) 2000-2013 Free Software Foundation, Inc.
+# Copyright (C) 2000-2015 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -3,7 +3,7 @@
 # Update b4_copyright invocations or b4_copyright_years definitions to
 # include the current year.

-# Copyright (C) 2009-2013 Free Software Foundation, Inc.
+# Copyright (C) 2009-2015 Free Software Foundation, Inc.

 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -2,7 +2,7 @@

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

-# Copyright (C) 2010-2013 Free Software Foundation, Inc.
+# Copyright (C) 2010-2015 Free Software Foundation, Inc.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,5 +1,5 @@
 # Customize maint.mk                           -*- makefile -*-
-# Copyright (C) 2008-2013 Free Software Foundation, Inc.
+# Copyright (C) 2008-2015 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 # Configure template for GNU Bison.                   -*-Autoconf-*-
 #
-# Copyright (C) 2001-2013 Free Software Foundation, Inc.
+# Copyright (C) 2001-2015 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
@@ -26,7 +26,7 @@ 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], [2013])
+AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2015])
 AC_DEFINE_UNQUOTED([PACKAGE_COPYRIGHT_YEAR], [$PACKAGE_COPYRIGHT_YEAR],
                   [The copyright year for this package])

@@ -71,14 +71,17 @@ 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 -Wdocumentation
    -Wformat -Wpointer-arith -Wwrite-strings'
  warn_c='-Wbad-function-cast -Wshadow -Wstrict-prototypes'
  warn_cxx='-Wnoexcept'
@@ -234,6 +237,9 @@ case $VALGRIND:$host_os in
    ;;
 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])
@@ -52,7 +52,7 @@ into various formats.

 -----

-Copyright (C) 2002, 2008-2013 Free Software Foundation, Inc.
+Copyright (C) 2002, 2008-2015 Free Software Foundation, Inc.

 This file is part of GNU Bison.

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

 # Language-independent M4 Macros for Bison.

-# Copyright (C) 2002, 2004-2013 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2004-2015 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
@@ -437,7 +437,6 @@ 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)],
@@ -1061,3 +1060,6 @@ 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])
@@ -2,7 +2,7 @@

 # C++ skeleton dispatching for Bison.

-# Copyright (C) 2006-2007, 2009-2013 Free Software Foundation, Inc.
+# Copyright (C) 2006-2007, 2009-2015 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -2,7 +2,7 @@

 # C++ skeleton for Bison

-# Copyright (C) 2002-2013 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015 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
@@ -17,6 +17,11 @@
 # 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])
@@ -169,9 +174,12 @@ m4_define([b4_public_types_declare],
    /// (External) token type, as returned by yylex.
    typedef token::yytokentype token_type;

-    /// Internal symbol number.
+    /// Symbol type: an 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;

@@ -204,8 +212,15 @@ 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);

@@ -235,21 +250,23 @@ 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).
-      /// -1 when this symbol is empty.
+      /// \a empty when empty.
      symbol_number_type type_get () const;

      /// The token.
      token_type token () const;

-      enum { empty = 0 };
-
      /// The symbol type.
-      /// -1 when this symbol is empty.
-      token_number_type type;
+      /// \a empty_symbol when empty.
+      /// An int, not token_number_type, to be able to store empty_symbol.
+      int type;
    };

    /// "External" symbols: returned by the scanner.
@@ -318,9 +335,19 @@ m4_define([b4_public_types_define],
  template <typename Base>
  inline
  ]b4_parser_class_name[::basic_symbol<Base>::~basic_symbol ()
+  {
+    clear ();
+  }
+
+  template <typename Base>
+  inline
+  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
@@ -330,6 +357,15 @@ m4_define([b4_public_types_define],

    // Type destructor.
  ]b4_symbol_variant([[yytype]], [[value]], [[template destroy]])])[
+    Base::clear ();
+  }
+
+  template <typename Base>
+  inline
+  bool
+  ]b4_parser_class_name[::basic_symbol<Base>::empty () const
+  {
+    return Base::type_get () == empty_symbol;
  }

  template <typename Base>
@@ -347,7 +383,7 @@ m4_define([b4_public_types_define],
  // by_type.
  inline
  ]b4_parser_class_name[::by_type::by_type ()
-     : type (empty)
+    : type (empty_symbol)
  {}

  inline
@@ -360,12 +396,19 @@ m4_define([b4_public_types_define],
    : type (yytranslate_ (t))
  {}

+  inline
+  void
+  ]b4_parser_class_name[::by_type::clear ()
+  {
+    type = empty_symbol;
+  }
+
  inline
  void
  ]b4_parser_class_name[::by_type::move (by_type& that)
  {
    type = that.type;
-    that.type = empty;
+    that.clear ();
  }

  inline
@@ -2,7 +2,7 @@

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

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

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -2,7 +2,7 @@

 # C skeleton dispatching for Bison.

-# Copyright (C) 2006-2007, 2009-2013 Free Software Foundation, Inc.
+# Copyright (C) 2006-2007, 2009-2015 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -2,7 +2,7 @@

 # C M4 Macros for Bison.

-# Copyright (C) 2002, 2004-2013 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2004-2015 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
@@ -97,7 +97,8 @@ m4_define([b4_api_PREFIX],
 m4_define_default([b4_prefix], [b4_api_prefix])

 # If the %union is not named, its name is YYSTYPE.
-m4_define_default([b4_union_name], [b4_api_PREFIX[]STYPE])
+b4_percent_define_default([[api.value.union.name]],
+                          [b4_api_PREFIX[][STYPE]])


 ## ------------------------ ##
@@ -560,15 +561,15 @@ 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 with a field of that type,
-# and extend the symbol's "type" field to point to the field name,
-# instead of the type name.
+# Extend the definition of %union's body (b4_union_members) with a
+# field of that type, and extend the symbol's "type" field to point to
+# the field name, instead of the type name.
 m4_define([b4_symbol_type_register],
 [m4_define([b4_symbol($1, type_tag)],
           [b4_symbol_if([$1], [has_id],
                         [b4_symbol([$1], [id])],
                         [yytype_[]b4_symbol([$1], [number])])])dnl
-m4_append([b4_user_union_members],
+m4_append([b4_union_members],
 m4_expand([
  b4_symbol_tag_comment([$1])dnl
  b4_symbol([$1], [type]) b4_symbol([$1], [type_tag]);]))
@@ -608,10 +609,9 @@ m4_copy_force([b4_symbol_value_union], [b4_symbol_value])
 ])


-# ---------------- #
-# api.value.type.  #
-# ---------------- #
-
+# -------------------------- #
+# api.value.type = variant.  #
+# -------------------------- #

 # b4_value_type_setup_variant
 # ---------------------------
@@ -686,11 +686,13 @@ 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
-typedef union ]b4_union_name[ ]b4_api_PREFIX[STYPE;
-union ]b4_union_name[
+]b4_percent_define_get_syncline([[api.value.union.name]])[
+union ]b4_percent_define_get([[api.value.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
@@ -2,7 +2,7 @@

 # GLR skeleton for Bison

-# Copyright (C) 2002-2013 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015 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
@@ -178,9 +178,42 @@ 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])[
+
+]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],
-             [2002-2013])[
+             [2002-2015])[

 /* C GLR parser skeleton written by Paul Hilfinger.  */

@@ -910,14 +943,18 @@ 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 yylhs)
+yyLRgotoState (yyStateNum yystate, yySymbol yysym)
 {
-  int yyr = yypgoto[yylhs - YYNTOKENS] + yystate;
+  int yyr = yypgoto[yysym - YYNTOKENS] + yystate;
  if (0 <= yyr && yyr <= YYLAST && yycheck[yyr] == yystate)
    return yytable[yyr];
  else
-    return yydefgoto[yylhs - YYNTOKENS];
+    return yydefgoto[yysym - YYNTOKENS];
 }

 static inline yybool
@@ -1655,7 +1692,7 @@ yyreportAmbiguity (yySemanticOption* yyx0,
 *  ending at YYS1.  Has no effect on previously resolved states.
 *  The first semantic option of a state is always chosen.  */
 static void
-yyresolveLocations (yyGLRState* yys1, int yyn1,
+yyresolveLocations (yyGLRState *yys1, int yyn1,
                    yyGLRStack *yystackp]b4_user_formals[)
 {
  if (0 < yyn1)
@@ -1666,9 +1703,9 @@ yyresolveLocations (yyGLRState* yys1, int yyn1,
          yyGLRStackItem yyrhsloc[1 + YYMAXRHS];
          int yynrhs;
          yySemanticOption *yyoption = yys1->yysemantics.yyfirstVal;
-          YYASSERT (yyoption != YY_NULLPTR);
+          YYASSERT (yyoption);
          yynrhs = yyrhsLength (yyoption->yyrule);
-          if (yynrhs > 0)
+          if (0 < yynrhs)
            {
              yyGLRState *yys;
              int yyn;
@@ -1691,18 +1728,7 @@ yyresolveLocations (yyGLRState* yys1, int yyn1,
              yyGLRState *yyprevious = yyoption->yystate;
              yyrhsloc[0].yystate.yyloc = yyprevious->yyloc;
            }
-          {
-            int yychar_current = yychar;
-            YYSTYPE yylval_current = yylval;
-            YYLTYPE yylloc_current = yylloc;
-            yychar = yyoption->yyrawchar;
-            yylval = yyoption->yyval;
-            yylloc = yyoption->yyloc;
-            YYLLOC_DEFAULT ((yys1->yyloc), yyrhsloc, yynrhs);
-            yychar = yychar_current;
-            yylval = yylval_current;
-            yylloc = yylloc_current;
-          }
+          YYLLOC_DEFAULT ((yys1->yyloc), yyrhsloc, yynrhs);
        }
    }
 }]])[
@@ -2546,16 +2572,3 @@ 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()
-])])
@@ -1,6 +1,6 @@
 # C++ GLR skeleton for Bison

-# Copyright (C) 2002-2013 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015 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
@@ -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++],
-             [2002-2013])[
+             [2002-2015])[

 // C++ GLR parser skeleton written by Akim Demaille.

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

 # Java skeleton dispatching for Bison.

-# Copyright (C) 2007, 2009-2013 Free Software Foundation, Inc.
+# Copyright (C) 2007, 2009-2015 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -2,7 +2,7 @@

 # Java language support for Bison

-# Copyright (C) 2007-2013 Free Software Foundation, Inc.
+# Copyright (C) 2007-2015 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 # C++ skeleton for Bison

-# Copyright (C) 2002-2013 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015 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],
-           [2002-2013])
+           [2002-2015])

 m4_define([b4_parser_class_name],
          [b4_percent_define_get([[parser_class_name]])])
@@ -149,10 +149,11 @@ b4_variant_if([m4_include(b4_pkgdatadir/[variant.hh])])
 m4_define([b4_shared_declarations],
 [b4_percent_code_get([[requires]])[
 ]b4_parse_assert_if([# include <cassert>])[
-# include <vector>
+# include <cstdlib> // std::abort
 # include <iostream>
 # include <stdexcept>
-# include <string>]b4_defines_if([[
+# include <string>
+# include <vector>]b4_defines_if([[
 # include "stack.hh"
 ]b4_bison_locations_if([[# include "location.hh"]])])[
 ]b4_variant_if([b4_variant_includes])[
@@ -214,14 +215,14 @@ b4_location_define])])[

    /// Generate an error message.
    /// \param yystate   the state where the error occurred.
-    /// \param yytoken   the lookahead token type, or yyempty_.
+    /// \param yyla      the lookahead token.
    virtual std::string yysyntax_error_ (state_type yystate,
-                                         symbol_number_type yytoken) const;
+                                         const symbol_type& yyla) const;

    /// Compute post-reduction state.
    /// \param yystate   the current state
-    /// \param yylhs     the nonterminal to push on the stack
-    state_type yy_lr_goto_state_ (state_type yystate, int yylhs);
+    /// \param yysym     the nonterminal to push on the stack
+    state_type yy_lr_goto_state_ (state_type yystate, int yysym);

    /// Whether the given \c yypact_ value indicates a defaulted state.
    /// \param yyvalue   the value to check
@@ -288,16 +289,21 @@ 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).
-      /// "empty" when empty.
+      /// \a empty_symbol when empty.
      symbol_number_type type_get () const;

-      enum { empty = 0 };
+      /// The state number used to denote an empty symbol.
+      enum { empty_state = -1 };

      /// The state.
+      /// \a empty when empty.
      state_type state;
    };

@@ -338,13 +344,12 @@ b4_location_define])])[
    /// Pop \a n symbols the three stacks.
    void yypop_ (unsigned int n = 1);

-    // Constants.
+    /// Constants.
    enum
    {
      yyeof_ = 0,
      yylast_ = ]b4_last[,     ///< Last index in yytable_.
      yynnts_ = ]b4_nterms_number[,  ///< Number of nonterminal symbols.
-      yyempty_ = -2,
      yyfinal_ = ]b4_final_state_number[, ///< Termination state number.
      yyterror_ = 1,
      yyerrcode_ = 256,
@@ -464,7 +469,7 @@ m4_if(b4_prefix, [yy], [],
 #endif // !]b4_api_PREFIX[DEBUG

 #define yyerrok         (yyerrstatus_ = 0)
-#define yyclearin       (yyempty = true)
+#define yyclearin       (yyla.clear ())

 #define YYACCEPT        goto yyacceptlab
 #define YYABORT         goto yyabortlab
@@ -533,7 +538,7 @@ m4_if(b4_prefix, [yy], [],
  // by_state.
  inline
  ]b4_parser_class_name[::by_state::by_state ()
-    : state (empty)
+    : state (empty_state)
  {}

  inline
@@ -541,12 +546,19 @@ m4_if(b4_prefix, [yy], [],
    : state (other.state)
  {}

+  inline
+  void
+  ]b4_parser_class_name[::by_state::clear ()
+  {
+    state = empty_state;
+  }
+
  inline
  void
  ]b4_parser_class_name[::by_state::move (by_state& that)
  {
    state = that.state;
-    that.state = empty;
+    that.clear ();
  }

  inline
@@ -558,7 +570,10 @@ m4_if(b4_prefix, [yy], [],
  ]b4_parser_class_name[::symbol_number_type
  ]b4_parser_class_name[::by_state::type_get () const
  {
-    return state == empty ? 0 : yystos_[state];
+    if (state == empty_state)
+      return empty_symbol;
+    else
+      return yystos_[state];
  }

  inline
@@ -574,7 +589,7 @@ m4_if(b4_prefix, [yy], [],
                                      [value], [move], [that.value])],
                   [[value = that.value;]])[
    // that is emptied.
-    that.type = empty;
+    that.type = empty_symbol;
  }

  inline
@@ -611,6 +626,10 @@ 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 << ": "])[;
@@ -671,13 +690,13 @@ m4_if(b4_prefix, [yy], [],
 #endif // ]b4_api_PREFIX[DEBUG

  inline ]b4_parser_class_name[::state_type
-  ]b4_parser_class_name[::yy_lr_goto_state_ (state_type yystate, int yylhs)
+  ]b4_parser_class_name[::yy_lr_goto_state_ (state_type yystate, int yysym)
  {
-    int yyr = yypgoto_[yylhs - yyntokens_] + yystate;
+    int yyr = yypgoto_[yysym - yyntokens_] + yystate;
    if (0 <= yyr && yyr <= yylast_ && yycheck_[yyr] == yystate)
      return yytable_[yyr];
    else
-      return yydefgoto_[yylhs - yyntokens_];
+      return yydefgoto_[yysym - yyntokens_];
  }

  inline bool
@@ -695,11 +714,9 @@ 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.
@@ -712,9 +729,6 @@ 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;

@@ -756,7 +770,7 @@ b4_dollar_popdef])[]dnl
      goto yydefault;

    // Read a lookahead token.
-    if (yyempty)
+    if (yyla.empty ())
      {
        YYCDEBUG << "Reading a token: ";
        try
@@ -770,7 +784,6 @@ b4_dollar_popdef])[]dnl
            error (yyexc);
            goto yyerrlab1;
          }
-        yyempty = false;
      }
    YY_SYMBOL_PRINT ("Next token is", yyla);

@@ -790,9 +803,6 @@ 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_;
@@ -815,52 +825,55 @@ b4_dollar_popdef])[]dnl
  `-----------------------------*/
  yyreduce:
    yylen = yyr2_[yyn];
-    yylhs.state = yy_lr_goto_state_(yystack_[yylen].state, yyr1_[yyn]);]b4_variant_if([
-    /* Variants are always initialized to an empty instance of the
-       correct type. The default $$=$1 action is NOT applied when using
-       variants.  */
-    b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build])],[
-    /* If YYLEN is nonzero, implement the default value of the action:
-       '$$ = $1'.  Otherwise, use the top of the stack.
+    {
+      stack_symbol_type yylhs;
+      yylhs.state = yy_lr_goto_state_(yystack_[yylen].state, yyr1_[yyn]);]b4_variant_if([
+      /* Variants are always initialized to an empty instance of the
+         correct type. The default '$$ = $1' action is NOT applied
+         when using variants.  */
+      b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build])], [
+      /* If YYLEN is nonzero, implement the default value of the
+         action: '$$ = $1'.  Otherwise, use the top of the stack.

-       Otherwise, the following line sets YYLHS.VALUE to garbage.
-       This behavior is undocumented and Bison
-       users should not rely upon it.  */
-    if (yylen)
-      yylhs.value = yystack_@{yylen - 1@}.value;
-    else
-      yylhs.value = yystack_@{0@}.value;])[
+         Otherwise, the following line sets YYLHS.VALUE to garbage.
+         This behavior is undocumented and Bison users should not rely
+         upon it.  */
+      if (yylen)
+        yylhs.value = yystack_@{yylen - 1@}.value;
+      else
+        yylhs.value = yystack_@{0@}.value;])[
 ]b4_locations_if([dnl
 [
-    // Compute the default @@$.
-    {
-      slice<stack_symbol_type, stack_type> slice (yystack_, yylen);
-      YYLLOC_DEFAULT (yylhs.location, slice, yylen);
-    }]])[
-
-    // Perform the reduction.
-    YY_REDUCE_PRINT (yyn);
-    try
+      // Compute the default @@$.
      {
-        switch (yyn)
-          {
+        slice<stack_symbol_type, stack_type> slice (yystack_, yylen);
+        YYLLOC_DEFAULT (yylhs.location, slice, yylen);
+      }]])[
+
+      // Perform the reduction.
+      YY_REDUCE_PRINT (yyn);
+      try
+        {
+          switch (yyn)
+            {
 ]b4_user_actions[
-          default:
-            break;
-          }
-      }
-    catch (const syntax_error& yyexc)
-      {
-        error (yyexc);
-        YYERROR;
-      }
-    YY_SYMBOL_PRINT ("-> $$ =", yylhs);
-    yypop_ (yylen);
-    yylen = 0;
-    YY_STACK_PRINT ();
+            default:
+              break;
+            }
+        }
+      catch (const syntax_error& yyexc)
+        {
+          error (yyexc);
+          YYERROR;
+        }
+      YY_SYMBOL_PRINT ("-> $$ =", yylhs);
+      yypop_ (yylen);
+      yylen = 0;
+      YY_STACK_PRINT ();

-    // Shift the result of the reduction.
-    yypush_ (YY_NULLPTR, yylhs);
+      // Shift the result of the reduction.
+      yypush_ (YY_NULLPTR, yylhs);
+    }
    goto yynewstate;

  /*--------------------------------------.
@@ -872,8 +885,7 @@ b4_dollar_popdef])[]dnl
      {
        ++yynerrs_;
        error (]b4_join(b4_locations_if([yyla.location]),
-                        [[yysyntax_error_ (yystack_[0].state,
-                                           yyempty ? yyempty_ : yyla.type_get ())]])[);
+                        [[yysyntax_error_ (yystack_[0].state, yyla)]])[);
      }

 ]b4_locations_if([[
@@ -886,10 +898,10 @@ b4_dollar_popdef])[]dnl
        // Return failure if at end of input.
        if (yyla.type_get () == yyeof_)
          YYABORT;
-        else if (!yyempty)
+        else if (!yyla.empty ())
          {
            yy_destroy_ ("Error: discarding", yyla);
-            yyempty = true;
+            yyla.clear ();
          }
      }

@@ -907,10 +919,7 @@ b4_dollar_popdef])[]dnl
       code.  */
    if (false)
      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();]])[
+    yyerror_range[1].location = yystack_[yylen - 1].location;]])[
    /* Do not reclaim the symbols of the rule whose action triggered
       this YYERROR.  */
    yypop_ (yylen);
@@ -968,7 +977,7 @@ b4_dollar_popdef])[]dnl
    goto yyreturn;

  yyreturn:
-    if (!yyempty)
+    if (!yyla.empty ())
      yy_destroy_ ("Cleanup: discarding lookahead", yyla);

    /* Do not reclaim the symbols of the rule whose action triggered
@@ -988,7 +997,7 @@ b4_dollar_popdef])[]dnl
                 << std::endl;
        // Do not try to display the values of the reclaimed symbols,
        // as their printer might throw an exception.
-        if (!yyempty)
+        if (!yyla.empty ())
          yy_destroy_ (YY_NULLPTR, yyla);

        while (1 < yystack_.size ())
@@ -1010,10 +1019,9 @@ b4_dollar_popdef])[]dnl
  // Generate an error message.
  std::string
  ]b4_parser_class_name[::yysyntax_error_ (]dnl
-b4_error_verbose_if([state_type yystate, symbol_number_type yytoken],
-                    [state_type, symbol_number_type])[) const
+b4_error_verbose_if([state_type yystate, const symbol_type& yyla],
+                    [state_type, const symbol_type&])[) const
  {]b4_error_verbose_if([[
-    std::string yyres;
    // Number of reported tokens (one for the "unexpected", one per
    // "expected").
    size_t yycount = 0;
@@ -1027,7 +1035,7 @@ b4_error_verbose_if([state_type yystate, symbol_number_type yytoken],
         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 yytoken) is
+       - The only way there can be no lookahead present (in yyla) 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
@@ -1047,8 +1055,9 @@ b4_error_verbose_if([state_type yystate, symbol_number_type yytoken],
         token that will not be accepted due to an error action in a
         later state.
    */
-    if (yytoken != yyempty_)
+    if (!yyla.empty ())
      {
+        int yytoken = yyla.type_get ();
        yyarg[yycount++] = yytname_[yytoken];
        int yyn = yypact_[yystate];
        if (!yy_pact_value_is_default_ (yyn))
@@ -1091,6 +1100,7 @@ b4_error_verbose_if([state_type yystate, symbol_number_type yytoken],
 #undef YYCASE_
      }

+    std::string yyres;
    // Argument number.
    size_t yyi = 0;
    for (char const* yyp = yyformat; *yyp; ++yyp)
@@ -1,6 +1,6 @@
 # Java skeleton for Bison -*- autoconf -*-

-# Copyright (C) 2007-2013 Free Software Foundation, Inc.
+# Copyright (C) 2007-2015 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],
-             [2007-2013])
+             [2007-2015])

 b4_percent_define_ifdef([package], [package b4_percent_define_get([package]);
 ])[/* First part of user declarations.  */
@@ -453,6 +453,19 @@ 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;
@@ -483,14 +496,7 @@ b4_define_state])[
    yylen = 0;

    /* Shift the result of the reduction.  */
-    yyn = yyr1_[yyn];
-    int yystate = yypgoto_[yyn - yyntokens_] + yystack.stateAt (0);
-    if (0 <= yystate && yystate <= yylast_
-        && yycheck_[yystate] == yystack.stateAt (0))
-      yystate = yytable_[yystate];
-    else
-      yystate = yydefgoto_[yyn - yyntokens_];
-
+    int yystate = yy_lr_goto_state_ (yystack.stateAt (0), yyr1_[yyn]);
    yystack.push (yystate, yyval]b4_locations_if([, yyloc])[);
    return YYNEWSTATE;
  }
@@ -1,4 +1,4 @@
-## Copyright (C) 2002, 2005-2013 Free Software Foundation, Inc.
+## Copyright (C) 2002, 2005-2015 Free Software Foundation, Inc.

 ## This program is free software: you can redistribute it and/or modify
 ## it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 # C++ skeleton for Bison

-# Copyright (C) 2002-2013 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015 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],
-           [2002-2013])
+           [2002-2015])

 # b4_position_define
 # ------------------
@@ -83,7 +83,7 @@ m4_define([b4_position_define],
    }
  };

-  /// Add and assign a position.
+  /// Add \a width columns, in place.
  inline position&
  operator+= (position& res, int width)
  {
@@ -91,21 +91,21 @@ m4_define([b4_position_define],
    return res;
  }

-  /// Add two position objects.
+  /// Add \a width columns.
  inline position
  operator+ (position res, int width)
  {
    return res += width;
  }

-  /// Add and assign a position.
+  /// Subtract \a width columns, in place.
  inline position&
  operator-= (position& res, int width)
  {
    return res += -width;
  }

-  /// Add two position objects.
+  /// Subtract \a width columns.
  inline position
  operator- (position res, int width)
  {
@@ -216,36 +216,42 @@ m4_define([b4_location_define],
    position end;
  };

-  /// Join two location objects to create a location.
-  inline location operator+ (location res, const location& end)
+  /// Join two locations, in place.
+  inline location& operator+= (location& res, const location& end)
  {
    res.end = end.end;
    return res;
  }

-  /// Change end position in place.
+  /// Join two locations.
+  inline location operator+ (location res, const location& end)
+  {
+    return res += end;
+  }
+
+  /// Add \a width columns to the end position, in place.
  inline location& operator+= (location& res, int width)
  {
    res.columns (width);
    return res;
  }

-  /// Change end position.
+  /// Add \a width columns to the end position.
  inline location operator+ (location res, int width)
  {
    return res += width;
  }

-  /// Change end position in place.
+  /// Subtract \a width columns to the end position, in place.
  inline location& operator-= (location& res, int width)
  {
    return res += -width;
  }

-  /// Change end position.
-  inline location operator- (const location& begin, int width)
+  /// Subtract \a width columns to the end position.
+  inline location operator- (location res, int width)
  {
-    return begin + -width;
+    return res -= width;
  }
 ]b4_percent_define_flag_if([[define_location_comparison]], [[
  /// Compare two location objects.
@@ -273,8 +279,7 @@ m4_define([b4_location_define],
  operator<< (std::basic_ostream<YYChar>& ostr, const location& loc)
  {
    unsigned int end_col = 0 < loc.end.column ? loc.end.column - 1 : 0;
-    ostr << loc.begin// << "(" << loc.end << ") "
-;
+    ostr << loc.begin;
    if (loc.end.filename
        && (!loc.begin.filename
            || *loc.begin.filename != *loc.end.filename))
@@ -1,6 +1,6 @@
 # C++ skeleton for Bison

-# Copyright (C) 2002-2013 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015 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],
-           [2002-2013])
+           [2002-2015])

 # b4_stack_define
 # ---------------
@@ -32,12 +32,12 @@ m4_define([b4_stack_define],
    stack ()
      : seq_ ()
    {
+      seq_.reserve (200);
    }

    stack (unsigned int n)
      : seq_ (n)
-    {
-    }
+    {}

    inline
    T&
@@ -114,8 +114,7 @@ m4_define([b4_stack_define],
    slice (const S& stack, unsigned int range)
      : stack_ (stack)
      , range_ (range)
-    {
-    }
+    {}

    inline
    const T&
@@ -1,6 +1,6 @@
 # C++ skeleton for Bison

-# Copyright (C) 2002-2013 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015 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
@@ -95,13 +95,13 @@ m4_define([b4_variant_define],

    /// Empty construction.
    variant ()]b4_parse_assert_if([
-      : yytname_ (YY_NULLPTR)])[
+      : yytypeid_ (YY_NULLPTR)])[
    {}

    /// Construct and fill.
    template <typename T>
    variant (const T& t)]b4_parse_assert_if([
-      : yytname_ (typeid (T).name ())])[
+      : yytypeid_ (&typeid (T))])[
    {
      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 (!yytname_);
+      YYASSERT (!yytypeid_);
    ])[}

    /// Instantiate an empty \a T in here.
@@ -118,9 +118,9 @@ m4_define([b4_variant_define],
    T&
    build ()
    {]b4_parse_assert_if([
-      YYASSERT (!yytname_);
+      YYASSERT (!yytypeid_);
      YYASSERT (sizeof (T) <= S);
-      yytname_ = typeid (T).name ();])[
+      yytypeid_ = & typeid (T);])[
      return *new (yyas_<T> ()) T;
    }

@@ -129,9 +129,9 @@ m4_define([b4_variant_define],
    T&
    build (const T& t)
    {]b4_parse_assert_if([
-      YYASSERT (!yytname_);
+      YYASSERT (!yytypeid_);
      YYASSERT (sizeof (T) <= S);
-      yytname_ = typeid (T).name ();])[
+      yytypeid_ = & typeid (T);])[
      return *new (yyas_<T> ()) T (t);
    }

@@ -140,7 +140,7 @@ m4_define([b4_variant_define],
    T&
    as ()
    {]b4_parse_assert_if([
-      YYASSERT (yytname_ == typeid (T).name ());
+      YYASSERT (*yytypeid_ == typeid (T));
      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 (yytname_ == typeid (T).name ());
+      YYASSERT (*yytypeid_ == typeid (T));
      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 (yytname_);
-      YYASSERT (yytname_ == other.yytname_);])[
+      YYASSERT (yytypeid_);
+      YYASSERT (*yytypeid_ == *other.yytypeid_);])[
      std::swap (as<T> (), other.as<T> ());
    }

@@ -198,7 +198,7 @@ m4_define([b4_variant_define],
    destroy ()
    {
      as<T> ().~T ();]b4_parse_assert_if([
-      yytname_ = YY_NULLPTR;])[
+      yytypeid_ = YY_NULLPTR;])[
    }

  private:
@@ -233,7 +233,7 @@ m4_define([b4_variant_define],
    } yybuffer_;]b4_parse_assert_if([

    /// Whether the content is built: if defined, the name of the stored type.
-    const char *yytname_;])[
+    const std::type_info *yytypeid_;])[
  };
 ]])

@@ -3,7 +3,7 @@
 <!--
    bison.xsl - common templates for Bison XSLT.

-    Copyright (C) 2007-2013 Free Software Foundation, Inc.
+    Copyright (C) 2007-2015 Free Software Foundation, Inc.

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

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

-    Copyright (C) 2007-2013 Free Software Foundation, Inc.
+    Copyright (C) 2007-2015 Free Software Foundation, Inc.

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

@@ -201,6 +201,8 @@
  <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()">
@@ -214,7 +216,9 @@
  <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>
@@ -3,7 +3,7 @@
 <!--
    xml2text.xsl - transform Bison XML Report into plain text.

-    Copyright (C) 2007-2013 Free Software Foundation, Inc.
+    Copyright (C) 2007-2015 Free Software Foundation, Inc.

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

@@ -350,12 +350,7 @@
    <xsl:if test="position() = $point + 1">
      <xsl:text> .</xsl:text>
    </xsl:if>
-    <xsl:if test="$itemset = 'true' and name(.) != 'empty'">
-      <xsl:apply-templates select="."/>
-    </xsl:if>
-    <xsl:if test="$itemset != 'true'">
-      <xsl:apply-templates select="."/>
-    </xsl:if>
+    <xsl:apply-templates select="."/>
    <xsl:if test="position() = last() and position() = $point">
      <xsl:text> .</xsl:text>
    </xsl:if>
@@ -3,7 +3,7 @@
 <!--
    xml2html.xsl - transform Bison XML Report into XHTML.

-    Copyright (C) 2007-2013 Free Software Foundation, Inc.
+    Copyright (C) 2007-2015 Free Software Foundation, Inc.

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

@@ -532,12 +532,7 @@
      <xsl:text> </xsl:text>
      <span class="point">.</span>
    </xsl:if>
-    <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:apply-templates select="."/>
    <xsl:if test="position() = last() and position() = $point">
      <xsl:text> </xsl:text>
      <span class="point">.</span>
@@ -563,7 +558,7 @@
 </xsl:template>

 <xsl:template match="empty">
-  <xsl:text> &#949;</xsl:text>
+  <xsl:text> %empty</xsl:text>
 </xsl:template>

 <xsl:template match="lookaheads">
@@ -1,11 +1,11 @@
                                                             -*- C -*-
 # Yacc compatible skeleton for Bison

-# Copyright (C) 1984, 1989-1990, 2000-2013 Free Software Foundation,
+# Copyright (C) 1984, 1989-1990, 2000-2015 Free Software Foundation,
 # Inc.

 m4_pushdef([b4_copyright_years],
-           [1984, 1989-1990, 2000-2013])
+           [1984, 1989-1990, 2000-2015])

 # 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
@@ -52,6 +52,8 @@ m4_define([b4_lac_flag],
                 [none], [[0]], [[1]])])

 m4_include(b4_pkgdatadir/[c.m4])
+m4_define([b4_yaxx],[$1])
+m4_define([b4_not_yaxx],[])

 ## ---------------- ##
 ## Default values.  ##
@@ -331,7 +333,11 @@ m4_if(b4_api_prefix, [yy], [],
 #define yydebug         ]b4_prefix[debug
 #define yynerrs         ]b4_prefix[nerrs
 ]]b4_pure_if([], [[
-#define yylval          ]b4_prefix[lval
+#define yylval          ]b4_prefix[lval]b4_yaxx([
+#define yytext  	]b4_prefix[text
+#define YYYAXX_XML  "b4_prefix[]yaxx.xml"
+#define YYYAXX_DTD  "b4_prefix[]yaxx.dtd"
+])[
 #define yychar          ]b4_prefix[char]b4_locations_if([[
 #define yylloc          ]b4_prefix[lloc]])]))[

@@ -420,6 +426,10 @@ typedef short int yytype_int16;
 /* The parser invokes alloca or malloc; define the necessary symbols.  */]dnl
 b4_push_if([], [b4_lac_if([], [[

+]b4_yaxx([
+#define XML_ALLOC(X) malloc(X)
+#define XML_FREE(X) free(X)
+])[
 # ifdef YYSTACK_USE_ALLOCA
 #  if YYSTACK_USE_ALLOCA
 #   ifdef __GNUC__
@@ -494,7 +504,7 @@ void free (void *); /* INFRINGES ON USER NAME SPACE */
 union yyalloc
 {
  yytype_int16 yyss_alloc;
-  YYSTYPE yyvs_alloc;]b4_locations_if([
+  YYSTYPE yyvs_alloc;]b4_yaxx([char *yyxs_alloc;])[]b4_locations_if([
  YYLTYPE yyls_alloc;])[
 };

@@ -505,10 +515,10 @@ union yyalloc
   N elements.  */
 ]b4_locations_if(
 [# define YYSTACK_BYTES(N) \
-     ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
+     ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE) ]b4_yaxx([+ sizeof(char*) ])[) \
      + 2 * YYSTACK_GAP_MAXIMUM)],
 [# define YYSTACK_BYTES(N) \
-     ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
+     ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) ]b4_yaxx([+ sizeof(char*) ])[) \
      + YYSTACK_GAP_MAXIMUM)])[

 # define YYCOPY_NEEDED 1
@@ -580,19 +590,27 @@ static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
  ]b4_translate[
 };

+]b4_not_yaxx([
 #if ]b4_api_PREFIX[DEBUG
+])[
 ]b4_integral_parser_table_define([rline], [b4_rline],
     [[YYRLINE[YYN] -- Source line where rule number YYN was defined.]])[
+]b4_not_yaxx([
 #endif
+])[

+]b4_not_yaxx([
 #if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[
+])[
 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
   First, the terminals, then, starting at YYNTOKENS, nonterminals.  */
 static const char *const yytname[] =
 {
  ]b4_tname[
 };
+]b4_not_yaxx([
 #endif
+])

 # ifdef YYPRINT
 /* YYTOKNUM[NUM] -- (External) token number corresponding to the
@@ -1366,7 +1384,194 @@ b4_function_define([[yyparse]], [[int]], b4_parse_param)[
  [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
  [[[YYLTYPE *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
  b4_parse_param]))], [[
+]b4_yaxx([
+extern char *b4_prefix[]text;
+// Yijun Yu: utility functions -----------------------------------------------
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stddef.h>
+/// replace character terminals into symbolic terminals
+static char *YYTNAME(int r)
+{
+  static char yytname_buf[[8]];
+  if (strlen(yytname[[r]])==3 && yytname[[r]][[0]] == '\'' && yytname[[r]][[2]] == '\'') 
+  { 
+        sprintf(yytname_buf, "CHAR%d", (int)yytname[[r]][[1]]);
+        return yytname_buf;
+  } 
+  else if (strlen(yytname[[r]])>=2 && yytname[[r]][[0]] == 64 )
+  {
+    strcpy(yytname_buf,"ACTION");
+    strcat(yytname_buf,&(yytname[[r]][[1]]));
+    return yytname_buf;
+  }

+  return (char *)yytname[[r]];
+}
+#include <stdio.h>
+#include <stddef.h>
+static char *yytext_buf = NULL;
+
+/// replace a special character in the text into an entity
+static
+void replace_entity(char c, char *s)
+{
+    char *buf;
+    char *i;
+    int len, l;
+    i = yytext_buf;
+    do {
+        i =  (char *)index(i, c);
+        if (i) {
+            l = i - yytext_buf;
+            len = strlen(yytext_buf) + strlen(s) - 1;
+            //buf = (char*)YYSTACK_ALLOC(1000000);
+            buf = (char*)YYSTACK_ALLOC(len + 1); // Myo M Thein
+            if (l>0) {
+#if 1 // Myo M Thein
+		strncpy(buf, yytext_buf, l);
+#else
+		int t = 0;
+		while (t < l) {
+			buf[t] = yytext_buf[t]; 
+			t++;
+		}
+                buf[t] = 0;
+#endif
+            } else {
+                buf[[0]] = 0;
+            }
+            strcat(buf, s); 
+            strncat(buf, yytext_buf + l + 1, strlen(yytext_buf) - l); 
+            buf[[len]] = 0;
+            YYSTACK_FREE(yytext_buf); 
+            //yytext_buf = buf;
+	    memcpy(yytext_buf,buf,len+1);
+        i++;
+        if (*i=='\0')
+            i=NULL;
+        }
+    } while (i);
+}
+
+/// replace the special characters in the text into entities 
+static
+char* xml_encode( char ch)
+{
+  static char text[[2]];
+    switch(ch)
+    {
+    case '&':
+        return ( "&amp;");
+        break;
+    case '>':
+        return ( "&gt;");
+        break;
+    case '<' :
+        return ( "&lt;" );
+        break;
+    case  '\"':
+        return ( "&quot;");
+        break;
+    case '\'':
+        return ( "&apos;");
+        break;
+    default:
+        text[[0]]=ch;
+        text[[1]]=0;
+        return text;
+        break;
+    }
+}
+
+static
+void replace_special_entities(char *text,char *text_out)
+{
+  int i,lg;
+    if (!text) { strcpy(text_out,"??");return ; }
+    lg = strlen(text);
+    strcpy(text_out,"");
+    for (i=0;i<lg;i++)
+    {
+       strcat(text_out,xml_encode(text[[i]]));
+    }
+}
+static
+void generate_xml_output(char **yyxsp,char **yyxs)
+{
+#ifndef YYYAXX_XML 
+#define YYYAXX_XML  "yaxx.xml"
+#endif
+#ifndef YYYAXX_DTD
+#define YYYAXX_DTD "yaxx.dtd"
+#endif
+       int r, i, j;
+       char buf[[2000]];
+       int old_rule = 0;
+       FILE *stdout = fopen(YYYAXX_XML, "w");
+       char *p = *yyxsp + 6;
+#if 0
+       char *v = strsep(&p, ">");
+       strcpy(buf, v);
+#else
+	   i = 0;
+	   while (p[[i]]!='>') {
+		buf[[i]] = p[[i]];
+		i++;
+	   }
+	   buf[[i]]  = 0;
+#endif
+       /// Generating the XML document 
+       /// version 
+       fprintf(stdout,"<?xml version=\"1.0\"?>\n");
+       /// DTD reference
+       fprintf(stdout,"<?xml-stylesheet type=\"text/xsl\" href=\"yaxx.xsl\"?>");
+       fprintf(stdout,"<!DOCTYPE %s SYSTEM \"" YYYAXX_DTD "\">\n", buf);
+       /// inserting name space before the XML data
+       fprintf(stdout,"<yaxx:%s xmlns:yaxx=\"urn:YAcc-Xml-eXtension\"%s\n", buf,
+            yyxs[[1]]+i+6); //ffprintf(stdout,f, "%s\n", yyxs[[1]]);
+       /// Generating the document type definition (DTD) 
+       stdout = fopen(YYYAXX_DTD , "w");
+       /// DTD for non-terminals
+       for (r = 2; r < sizeof(yyr1)/sizeof(unsigned short); r++) 
+       {
+        j = yyr1[[r]];
+        if (j != old_rule) {
+        	if (old_rule!=0)
+        		fprintf(stdout,")>\n");
+	        fprintf(stdout,"<!ELEMENT %s (", YYTNAME(yyr1[[r]]));
+        } else
+	    	fprintf(stdout," | ");
+        if (yyr2[[r]]==0) 
+           fprintf(stdout,"EMPTY");
+        else {
+		/*
+        	int multiple = 0;
+            for (i = yyprhs[[r]]; yyrhs[[i]] > 0 ; i++)
+               if (i!=yyprhs[[r]]) {
+               	multiple = 1; break;
+               }
+       		if (multiple) fprintf(stdout,"(");
+            for (i = yyprhs[[r]]; yyrhs[[i]] > 0 ; i++) {
+               if (i!=yyprhs[[r]])
+                   fprintf(stdout,",");
+               fprintf(stdout,"%s", YYTNAME(yyrhs[[i]]));
+            }
+       		if (multiple) fprintf(stdout,")");
+		 */
+         }
+         old_rule = j;
+       }
+       fprintf(stdout,")>\n");
+       /// DTD for terminals
+       for (r = 3; r < YYNTOKENS; r++) 
+       {
+            fprintf(stdout,"<!ELEMENT %s (#PCDATA)>\n", YYTNAME(r));
+       }
+    
+}
+])[

 /*----------.
 | yyparse.  |
@@ -1398,7 +1603,26 @@ b4_function_define([[yyparse]], [[int]], b4_parse_param)[
  YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
 #endif

+]b4_yaxx([
+
+  /* The tags stack. */
+  char *yyxsa[[YYINITDEPTH]];
+  char **yyxs = yyxsa;
+  char **yyxsp;
+])[
 #define YYPOPSTACK(N)   (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
+]b4_yaxx([
+#include <stdio.h>
+#include <string.h>
+#undef __GNUC_PREREQ
+#define __GNUC_PREREQ(maj, min) (maj < 4)
+#include <stdlib.h>
+#include <stddef.h>
+static char * yyxml_str=NULL; // for XML
+// for id attribute generation (by William Candillon)
+int _id = 0; 
+char str[[256]];
+])[

  /* The number of symbols on the RHS of the reduced rule.
     Keep to zero when no symbol should be popped.  */
@@ -1410,7 +1634,9 @@ b4_function_define([[yyparse]], [[int]], b4_parse_param)[
      goto yyread_pushed_token;
    }]])[

-  yyssp = yyss = yyssa;
+  yyssp = yyss = yyssa;]b4_yaxx([
+  yyxsp = yyxs = yyxsa;
+])[
  yyvsp = yyvs = yyvsa;]b4_locations_if([[
  yylsp = yyls = yylsa;]])[
  yystacksize = YYINITDEPTH;]b4_lac_if([[
@@ -1460,7 +1686,7 @@ b4_locations_if([[  yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yyllo
           these so that the &'s don't force the real ones into
           memory.  */
        YYSTYPE *yyvs1 = yyvs;
-        yytype_int16 *yyss1 = yyss;]b4_locations_if([
+        yytype_int16 *yyss1 = yyss;]b4_yaxx([ char **yyxs1 = yyxs;])[]b4_locations_if([
        YYLTYPE *yyls1 = yyls;])[

        /* Each stack pointer address is followed by the size of the
@@ -1469,9 +1695,9 @@ b4_locations_if([[  yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yyllo
           be undefined if yyoverflow is a macro.  */
        yyoverflow (YY_("memory exhausted"),
                    &yyss1, yysize * sizeof (*yyssp),
-                    &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
+                    &yyvs1, yysize * sizeof (*yyvsp),]b4_yaxx([&yyxs1, yysize * sizeof (*yyxsp),])[]b4_locations_if([
                    &yyls1, yysize * sizeof (*yylsp),])[
-                    &yystacksize);
+                    &yystacksize);]b4_yaxx([yyxs = yyxs1;])[
 ]b4_locations_if([
        yyls = yyls1;])[
        yyss = yyss1;
@@ -1495,7 +1721,7 @@ b4_locations_if([[  yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yyllo
        if (! yyptr)
          goto yyexhaustedlab;
        YYSTACK_RELOCATE (yyss_alloc, yyss);
-        YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([
+        YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_yaxx([YYSTACK_RELOCATE (yyxs_alloc, yyxs);])[]b4_locations_if([
        YYSTACK_RELOCATE (yyls_alloc, yyls);])[
 #  undef YYSTACK_RELOCATE
        if (yyss1 != yyssa)
@@ -1505,7 +1731,7 @@ b4_locations_if([[  yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yyllo
 #endif /* no yyoverflow */

      yyssp = yyss + yysize - 1;
-      yyvsp = yyvs + yysize - 1;]b4_locations_if([
+      yyvsp = yyvs + yysize - 1;]b4_yaxx([yyxsp = yyxs + yysize - 1;])[]b4_locations_if([
      yylsp = yyls + yysize - 1;])[

      YYDPRINTF ((stderr, "Stack size increased to %lu\n",
@@ -1570,7 +1796,33 @@ yyread_pushed_token:]])[
    }
  else
    {
-      yytoken = YYTRANSLATE (yychar);
+      yytoken = YYTRANSLATE (yychar);]b4_yaxx([
+{ // Yijun Yu: process the terminal
+      yyxml_str = (char *) XML_ALLOC(200);
+      strcpy(yyxml_str, "<yaxx:");
+      strcat(yyxml_str, YYTNAME(yytoken));      
+#if 1 //William Candillon
+      strcat(yyxml_str, " id=\"");
+      sprintf(str, "%x", _id);
+      strcat(yyxml_str, str);
+      strcat(yyxml_str, "\"");
+      _id++;
+#endif
+      strcat(yyxml_str, ">");
+      if (yytoken < YYNTOKENS) {
+	  if (yytext) {
+		  char *tmp;
+		  tmp=(char *)YYSTACK_ALLOC(6*strlen(yytext)+1); 
+		  replace_special_entities(yytext,tmp);
+		  strcat(yyxml_str, tmp);
+		  YYSTACK_FREE(tmp);
+	  }
+      }
+      strcat(yyxml_str, "</yaxx:");
+      strcat(yyxml_str, YYTNAME(yytoken));
+      strcat(yyxml_str, ">\n");
+    }
+])[
      YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
    }

@@ -1607,6 +1859,10 @@ yyread_pushed_token:]])[

  yystate = yyn;
  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+]b4_yaxx([
+  *++yyxsp = yyxml_str;
+  yyxml_str = 0;
+])[
  *++yyvsp = yylval;
  YY_IGNORE_MAYBE_UNINITIALIZED_END
 ]b4_locations_if([  *++yylsp = yylloc;])[
@@ -1654,6 +1910,53 @@ yyreduce:
    if (yychar_backup != yychar)
      YY_LAC_DISCARD ("yychar change");
  }]], [[
+]b4_yaxx([
+  {
+      int len = 0;
+      int alloc_len=0;
+      int n = 0;
+      int yyi;
+      for (yyi = 0; yyi < yylen; yyi++)
+      {
+          int l;
+          char * yyxml_str = yyxsp[[yyi+1-yylen]];
+          if (yyxml_str==NULL) {
+            l = 0;
+          } else
+            l = strlen(yyxml_str);
+          len += l;
+	  n++;
+      }
+      alloc_len =len+100+2*strlen(YYTNAME(yyr1[[yyn]]));
+      yyxml_str = (char *) XML_ALLOC(alloc_len);
+      strcpy(yyxml_str, "<yaxx:");
+      strcat(yyxml_str, YYTNAME(yyr1[[yyn]]));
+#if 1 //William Candillon
+      strcat(yyxml_str, " id=\"");
+      sprintf(str, "%x", _id);
+      strcat(yyxml_str, str);
+      strcat(yyxml_str, "\"");
+      _id++;
+#endif
+      strcat(yyxml_str, ">\n");
+      for (yyi = 0; yyi < yylen; yyi++)
+      {
+          char * xml_str = yyxsp[[yyi+1-yylen]];
+          if (xml_str) {
+              strcat(yyxml_str, xml_str); 
+              XML_FREE(xml_str);
+              yyxsp[[yyi+1-yylen]] = NULL;
+          } else {
+            fprintf(stderr, "Warning! the %d-th argument is empty", yyi+1);
+          }
+      }
+      strcat(yyxml_str, "</yaxx:");
+      strcat(yyxml_str, YYTNAME(yyr1[[yyn]]));
+      strcat(yyxml_str, ">\n");
+      yyxsp -= n;
+      *++yyxsp = yyxml_str;
+      yyxml_str = NULL;
+    }])[
  switch (yyn)
    {
      ]b4_user_actions[
@@ -1829,6 +2132,10 @@ yyerrlab1:
  YY_LAC_DISCARD ("error recovery");]])[

  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+]b4_yaxx([
+  *++yyxsp = yyxml_str;
+  yyxml_str = 0;
+])[
  *++yyvsp = yylval;
  YY_IGNORE_MAYBE_UNINITIALIZED_END
 ]b4_locations_if([[
@@ -1848,7 +2155,7 @@ yyerrlab1:
 /*-------------------------------------.
 | yyacceptlab -- YYACCEPT comes here.  |
 `-------------------------------------*/
-yyacceptlab:
+yyacceptlab:]b4_yaxx([generate_xml_output(--yyxsp,yyxs);])[
  yyresult = 0;
  goto yyreturn;

@@ -1,7 +1,7 @@
 # DJGPP Maintainer's Makefile                                    -*-Makefile-*-
 # Requires GNU sed

-## Copyright (C) 2005-2013 Free Software Foundation, Inc.
+## Copyright (C) 2005-2015 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 This is a port of GNU Bison @VERSION@ to MSDOS/DJGPP.

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

-# Copyright (C) 2005-2013 Free Software Foundation, Inc.
+# Copyright (C) 2005-2015 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -3,7 +3,7 @@
 # This is the config.site file for configuring GNU packages
 # which are to be built with DJGPP tools.

-# Copyright (C) 2005-2013 Free Software Foundation, Inc.
+# Copyright (C) 2005-2015 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 # sed script for DJGPP specific editing of config.hin

-# Copyright (C) 2005-2013 Free Software Foundation, Inc.
+# Copyright (C) 2005-2015 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
@@ -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) 2005-2013 Free Software Foundation, Inc.
+Rem Copyright (C) 2005-2015 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
@@ -1,4 +1,4 @@
-## Copyright (C) 2008-2013 Free Software Foundation, Inc.
+## Copyright (C) 2008-2015 Free Software Foundation, Inc.

 ## This program is free software: you can redistribute it and/or modify
 ## it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /* Subprocesses with pipes.

-   Copyright (C) 2005-2013 Free Software Foundation, Inc.
+   Copyright (C) 2005-2015 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /* Subprocesses with pipes.

-   Copyright (C) 2005-2013 Free Software Foundation, Inc.
+   Copyright (C) 2005-2015 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -2,7 +2,7 @@
 # Sed script for additional DJGPP specific editing
 # of the testsuite script generated by autoconf 2.61.

-# Copyright (C) 2007-2013 Free Software Foundation, Inc.
+# Copyright (C) 2007-2015 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
@@ -27,3 +27,4 @@
 /stamp-vti
 /version.texi
 /yacc.1
+/gendocs_template_min
@@ -1,6 +1,8 @@
 \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
@@ -33,7 +35,7 @@
 This manual (@value{UPDATED}) is for GNU Bison (version
@value{VERSION}), the GNU parser generator.

-Copyright @copyright{} 1988-1993, 1995, 1998-2013 Free Software
+Copyright @copyright{} 1988-1993, 1995, 1998-2015 Free Software
 Foundation, Inc.

@quotation
@@ -3849,7 +3851,7 @@ 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}.
+@code{YYSTYPE} (@pxref{%define Summary,,api.value.union.name}).

 As another extension to POSIX, you may specify multiple @code{%union}
 declarations; their contents are concatenated.  However, only the first
@@ -5143,7 +5145,9 @@ 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.  See also
+that has no semantic type tag.  @xref{Mfcalc Traces, ,Enabling Debug Traces
+for @code{mfcalc}}, for a complete example.
+


@node Expect Decl
@@ -6010,12 +6014,12 @@ Use this @var{type} as semantic value.
@item Default Value:
@itemize @minus
@item
-@code{%union} if @code{%union} is used, otherwise @dots{}
+@code{union-directive} if @code{%union} is used, otherwise @dots{}
@item
@code{int} if type tags are used (i.e., @samp{%token <@var{type}>@dots{}} or
-@samp{%token <@var{type}>@dots{}} is used), otherwise @dots{}
+@samp{%type <@var{type}>@dots{}} is used), otherwise @dots{}
@item
-@code{""}
+undefined.
@end itemize

@item History:
@@ -6026,6 +6030,30 @@ 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.
@@ -7522,7 +7550,7 @@ 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
@@ -10354,9 +10382,23 @@ declare @code{yyerror} as follows:
 int yyerror (char const *);
@end example

-Bison ignores the @code{int} value returned by this @code{yyerror}.
-If you use the Yacc library's @code{main} function, your
-@code{yyparse} function should have the following type signature:
+@noindent
+The @code{int} value returned by this @code{yyerror} is ignored.
+
+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);
@@ -10658,12 +10700,17 @@ The first, inclusive, position of the range, and the first beyond.
 Forwarded to the @code{end} position.
@end deftypemethod

-@deftypemethod {location} {location} operator+ (const location& @var{end})
-@deftypemethodx {location} {location} operator+ (int @var{width})
+@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})
@deftypemethodx {location} {location} operator-= (int @var{width})
-Various forms of syntactic sugar.
+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})
+Join two locations: starts at the position of the first one, and ends at the
+position of the second.
@end deftypemethod

@deftypemethod {location} {void} step ()
@@ -10701,8 +10748,8 @@ it must be copyable;
 in order to compute the (default) value of @code{@@$} in a reduction, the
 parser basically runs
@example
-@@$.begin = @@$1.begin;
-@@$.end   = @@$@var{N}.end; // The location of last right-hand side symbol.
+@@$.begin = @@1.begin;
+@@$.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;
@@ -11290,7 +11337,7 @@ 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
@@ -1,4 +1,4 @@
-## Copyright (C) 2001-2003, 2005-2013 Free Software Foundation, Inc.
+## Copyright (C) 2001-2003, 2005-2015 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
@@ -85,11 +85,13 @@ 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


 ## ----------- ##
@@ -106,7 +108,11 @@ remove_time_stamp = \
  sed 's/^\(\.TH[^"]*"[^"]*"[^"]*\)"[^"]*"/\1/'

 # Depend on configure to get version number changes.
-$(top_srcdir)/doc/bison.1: doc/bison.help doc/bison.x $(top_srcdir)/configure
+if ! CROSS_COMPILING
+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)
@@ -126,7 +132,7 @@ endif
 ## Graphviz examples generation. ##
 ## ----------------------------- ##

-CLEANDIRS += doc/figs
+CLEANFILES += $(FIGS_GV:.gv=.eps) $(FIGS_GV:.gv=.pdf) $(FIGS_GV:.gv=.png)
 FIGS_GV =                                               \
  doc/figs/example.gv                                   \
  doc/figs/example-reduce.gv doc/figs/example-shift.gv
@@ -19,7 +19,7 @@
 \def\finalout{\overfullrule=0pt}
 %\finalout

-% Copyright (c) 1998, 2001, 2009-2013 Free Software Foundation, Inc.
+% Copyright (c) 1998, 2001, 2009-2015 Free Software Foundation, Inc.
 %
 % This file is part of Bison.
 %
@@ -16,7 +16,7 @@ straightforward use of _build/src/bison would.)

 --

-Copyright (C) 2006, 2009-2013 Free Software Foundation, Inc.
+Copyright (C) 2006, 2009-2015 Free Software Foundation, Inc.

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

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

-# Copyright (C) 2006, 2008-2013 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2008-2015 Free Software Foundation, Inc.
 #
 # This file is part of Bison, the GNU Compiler Compiler.
 #
@@ -1,4 +1,4 @@
-## Copyright (C) 2006, 2008-2013 Free Software Foundation, Inc.
+## Copyright (C) 2006, 2008-2015 Free Software Foundation, Inc.

 ## This program is free software: you can redistribute it and/or modify
 ## it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2005-2013 Free Software Foundation, Inc.
+# Copyright (C) 2005-2015 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,4 +1,4 @@
-# Copyright (C) 2005-2006, 2008-2013 Free Software Foundation, Inc.
+# Copyright (C) 2005-2006, 2008-2015 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
@@ -27,11 +27,11 @@ SUFFIXES += .yy .stamp
 	$(AM_V_at)$(YACCCOMPILE) -o $*.cc $<
 	$(AM_V_at)mv -f $@.tmp $@

-$(calc_sources_generated): %D%/calc++-parser.stamp
+$(calcxx_sources_generated): %D%/calc++-parser.stamp
 	@test -f $@ || rm -f %D%/calc++-parser.stamp
 	@test -f $@ || $(MAKE) $(AM_MAKEFLAGS) %D%/calc++-parser.stamp
 CLEANFILES +=                                   \
-  $(calc_sources_generated)                     \
+  $(calcxx_sources_generated)                   \
  %D%/calc++-parser.output                      \
  %D%/calc++-parser.stamp                       \
  %D%/calc++-scanner.cc
@@ -42,31 +42,31 @@ CLEANFILES +=                                   \
 ## -------------------- ##

 # Avoid using BUILT_SOURCES which is too global.
-$(%C%_calc___OBJECTS): $(calc_sources_generated)
+$(%C%_calc___OBJECTS): $(calcxx_sources_generated)

-calc_sources_extracted =                        \
+calcxx_sources_extracted =                      \
  %D%/calc++-driver.cc                          \
  %D%/calc++-driver.hh                          \
  %D%/calc++-scanner.ll                         \
  %D%/calc++.cc
-calc_extracted =                                \
-  $(calc_sources_extracted)                     \
+calcxx_extracted =                              \
+  $(calcxx_sources_extracted)                   \
  %D%/calc++-parser.yy
-extracted += $(calc_extracted)
-calc_sources_generated =                        \
+extracted += $(calcxx_extracted)
+calcxx_sources_generated =                      \
  %D%/calc++-parser.cc                          \
  %D%/calc++-parser.hh                          \
  %D%/location.hh                               \
  %D%/position.hh                               \
  %D%/stack.hh
-calc_sources =                                  \
-  $(calc_sources_extracted)                     \
-  $(calc_sources_generated)
+calcxx_sources =                                \
+  $(calcxx_sources_extracted)                   \
+  $(calcxx_sources_generated)

 if FLEX_CXX_WORKS
 check_PROGRAMS += %D%/calc++
 nodist_%C%_calc___SOURCES =                     \
-  $(calc_sources)
+  $(calcxx_sources)

 %C%_calc___CPPFLAGS = -I$(top_builddir)/%D%
 %C%_calc___CXXFLAGS = $(AM_CXXFLAGS) $(FLEX_SCANNER_CXXFLAGS)
@@ -74,3 +74,11 @@ dist_TESTS += %D%/calc++.test
 else
 EXTRA_DIST += %D%/calc++.test
 endif
+
+
+## ------------ ##
+## Installing.  ##
+## ------------ ##
+
+calcxxdir = $(docdir)/examples/calc++
+calcxx_DATA = $(calcxx_extracted)
@@ -3,7 +3,7 @@

 # This file is part of GNU Bison

-# Copyright (C) 1992, 2000-2001, 2005-2006, 2009-2013 Free Software
+# Copyright (C) 1992, 2000-2001, 2005-2006, 2009-2015 Free Software
 # Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
@@ -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 input-file.texi ... -- [FILES to extract]
+# Usage: extexi [OPTION...] input-file.texi ... -- [FILES to extract]

 # Look for @example environments preceded with lines such as:
 #
@@ -35,6 +35,9 @@

 use strict;

+# Whether we generate synclines.
+my $synclines = 0;
+
 # normalize($block)
 # -----------------
 # Remove Texinfo mark up.
@@ -102,7 +105,7 @@ sub process ($)
            {
              # Bison supports synclines, but not Flex.
              $input .= sprintf ("#line %s \"$in\"\n", $. + 1)
-                if $file =~ /\.[chy]*$/;
+                if $synclines && $file =~ /\.[chy]*$/;
              next;
            }
          elsif (/^\@end (small)?example$/)
@@ -136,15 +139,19 @@ my @input;
 my $seen_dash = 0;
 for my $arg (@ARGV)
 {
-  if ($arg eq '--')
-    {
-      $seen_dash = 1;
-    }
-  elsif ($seen_dash)
+  if ($seen_dash)
    {
      use File::Basename;
      $file_wanted{basename($arg)} = $arg;
    }
+  elsif ($arg eq '--')
+    {
+      $seen_dash = 1;
+    }
+  elsif ($arg eq '--synclines')
+    {
+      $synclines = 1;
+    }
  else
    {
      push @input, $arg;
@@ -1,4 +1,4 @@
-# Copyright (C) 2005, 2008-2013 Free Software Foundation, Inc.
+# Copyright (C) 2005, 2008-2015 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
@@ -25,7 +25,10 @@ AM_CXXFLAGS =							\

 doc = $(top_srcdir)/doc/bison.texi
 extexi = $(top_srcdir)/%D%/extexi
-extract = VERSION="$(VERSION)" $(PERL) $(extexi) $(doc) --
+if ENABLE_GCC_WARNINGS
+extexiFLAGS = --synclines
+endif
+extract = VERSION="$(VERSION)" $(PERL) $(extexi) $(extexiFLAGS) $(doc) --
 extracted =
 CLEANFILES += $(extracted) %D%/extracted.stamp
 %D%/extracted.stamp: $(doc) $(extexi)
@@ -1,4 +1,4 @@
-# Copyright (C) 2005-2006, 2008-2013 Free Software Foundation, Inc.
+# Copyright (C) 2005-2006, 2008-2015 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
@@ -30,3 +30,10 @@ nodist_%C%_mfcalc_SOURCES = $(mfcalc_sources)

 %C%_mfcalc_CPPFLAGS = -I$(top_builddir)/%D%
 dist_TESTS += %D%/mfcalc.test
+
+## ------------ ##
+## Installing.  ##
+## ------------ ##
+
+mfcalcdir = $(docdir)/examples/mfcalc
+mfcalc_DATA = $(mfcalc_extracted)
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2005-2013 Free Software Foundation, Inc.
+# Copyright (C) 2005-2015 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,4 +1,4 @@
-# Copyright (C) 2005-2006, 2008-2013 Free Software Foundation, Inc.
+# Copyright (C) 2005-2006, 2008-2015 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
@@ -30,3 +30,10 @@ nodist_%C%_rpcalc_SOURCES = $(rpcalc_sources)

 %C%_rpcalc_CPPFLAGS = -I$(top_builddir)/%D%
 dist_TESTS += %D%/rpcalc.test
+
+## ------------ ##
+## Installing.  ##
+## ------------ ##
+
+rpcalcdir = $(docdir)/examples/rpcalc
+rpcalc_DATA = $(rpcalc_extracted)
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2005-2013 Free Software Foundation, Inc.
+# Copyright (C) 2005-2015 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 #! /bin/sh

-# Copyright (C) 2005-2013 Free Software Foundation, Inc.
+# Copyright (C) 2005-2015 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2008-2013 Free Software Foundation, Inc.
+  Copyright (C) 2008-2015 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
@@ -211,8 +211,6 @@
 /stripslash.c
 /strndup.c
 /strnlen.c
-/strtol.c
-/strtoul.c
 /strverscmp.c
 /sys
 /sys_ioctl.h
@@ -272,3 +270,7 @@
 /sig-handler.c
 /unistd.c
 /wctype-h.c
+/lstat.c
+/unlink.c
+/gettimeofday.c
+/sys_time.in.h
@@ -1,6 +1,6 @@
 /* Array bitsets.

-   Copyright (C) 2002-2003, 2006, 2009-2013 Free Software Foundation,
+   Copyright (C) 2002-2003, 2006, 2009-2015 Free Software Foundation,
   Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
@@ -1,6 +1,6 @@
 /* Functions to support abitsets.

-   Copyright (C) 2002, 2004, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2015 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Base bitset stuff.

-   Copyright (C) 2002-2004, 2006, 2009-2013 Free Software Foundation,
+   Copyright (C) 2002-2004, 2006, 2009-2015 Free Software Foundation,
   Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
@@ -1,6 +1,6 @@
 /* General bitsets.

-   Copyright (C) 2002-2006, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002-2006, 2009-2015 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Generic bitsets.

-   Copyright (C) 2002-2004, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002-2004, 2009-2015 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Bitset statistics.

-   Copyright (C) 2002-2006, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002-2006, 2009-2015 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Functions to support bitset statistics.

-   Copyright (C) 2002-2004, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002-2004, 2009-2015 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Bitset vectors.

-   Copyright (C) 2001-2002, 2004, 2006, 2009-2013 Free Software
+   Copyright (C) 2001-2002, 2004, 2006, 2009-2015 Free Software
   Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
@@ -1,6 +1,6 @@
 /* Bitset vectors.

-   Copyright (C) 2002, 2004, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2015 Free Software Foundation, Inc.

   Contributed by Akim Demaille (akim@freefriends.org).

@@ -1,6 +1,6 @@
 /* Bitset vectors.

-   Copyright (C) 2001-2002, 2004-2006, 2009-2013 Free Software
+   Copyright (C) 2001-2002, 2004-2006, 2009-2015 Free Software
   Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
@@ -1,6 +1,6 @@
 /* Bitset vectors.

-   Copyright (C) 2002, 2004, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2015 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Functions to support expandable bitsets.

-   Copyright (C) 2002-2006, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002-2006, 2009-2015 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Functions to support ebitsets.

-   Copyright (C) 2002, 2004, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2015 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* get-errno.c - get and set errno.

-   Copyright (C) 2002, 2006, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2006, 2009-2015 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /* get-errno.h - get and set errno.

-   Copyright (C) 2002, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2009-2015 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /* Functions to support link list bitsets.

-   Copyright (C) 2002-2004, 2006, 2009-2013 Free Software Foundation,
+   Copyright (C) 2002-2004, 2006, 2009-2015 Free Software Foundation,
   Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
@@ -1,6 +1,6 @@
 /* Functions to support lbitsets.

-   Copyright (C) 2002, 2004, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2015 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Fake libiberty.h for Bison.

-   Copyright (C) 2002-2004, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002-2004, 2009-2015 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -1,4 +1,4 @@
-# Copyright (C) 2001-2013 Free Software Foundation, Inc.
+# Copyright (C) 2001-2015 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /* Yacc library main function.

-   Copyright (C) 2002, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2009-2015 Free Software Foundation, Inc.

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

@@ -1,6 +1,6 @@
 /* Timing variables for measuring compiler performance.

-   Copyright (C) 2000, 2002, 2004, 2006, 2009-2013 Free Software
+   Copyright (C) 2000, 2002, 2004, 2006, 2009-2015 Free Software
   Foundation, Inc.

   Contributed by Alex Samuel <samuel@codesourcery.com>
@@ -1,7 +1,7 @@
 /* This file contains the definitions for timing variables used to -*- C -*-
   measure run-time performance of the compiler.

-   Copyright (C) 2002, 2007, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2007, 2009-2015 Free Software Foundation, Inc.

   Contributed by Akim Demaille <akim@freefriends.org>.

@@ -1,6 +1,6 @@
 /* Timing variables for measuring compiler performance.

-   Copyright (C) 2000, 2002, 2004, 2009-2013 Free Software Foundation,
+   Copyright (C) 2000, 2002, 2004, 2009-2015 Free Software Foundation,
   Inc.

   Contributed by Alex Samuel <samuel@codesourcery.com>
@@ -1,6 +1,6 @@
 /* Variable array bitsets.

-   Copyright (C) 2002-2006, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002-2006, 2009-2015 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Functions to support vbitsets.

-   Copyright (C) 2002, 2004, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2015 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Yacc library error-printing function.

-   Copyright (C) 2002, 2009-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2009-2015 Free Software Foundation, Inc.

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

@@ -144,8 +144,6 @@
 /string_h.m4
 /strndup.m4
 /strnlen.m4
-/strtol.m4
-/strtoul.m4
 /strverscmp.m4
 /sys_ioctl_h.m4
 /sys_socket_h.m4
@@ -180,3 +178,9 @@
 /obstack-printf.m4
 /extern-inline.m4
 /non-recursive-gnulib-prefix-hack.m4
+/absolute-header.m4
+/lstat.m4
+/unlink.m4
+/gettimeofday.m4
+/obstack.m4
+/sys_time_h.m4
--- a/Show More
+++ b/Show More
@@ -1 +1 @@
 .0
 .0.4