maint: Valgrind on OS X.

[bison.git] / data / lalr1.cc

diff --git a/data/lalr1.cc b/data/lalr1.cc
index c8c702a633ef8287de8351b52121a45b2d537c8e..17a8f22c032ac8fadda107f5bee7bf0aba4e27c3 100644 (file)
--- a/data/lalr1.cc
+++ b/data/lalr1.cc
@@ -1,249 +1,101 @@
-m4_divert(-1)
-

 # C++ skeleton for Bison
 
 # C++ skeleton for Bison
 

-# Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+# Copyright (C) 2002-2012 Free Software Foundation, Inc.

 
 

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

-# the Free Software Foundation; either version 2 of the License, or
+# the Free Software Foundation, either version 3 of the License, or

 # (at your option) any later version.
 # (at your option) any later version.

-
+#

 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.

-
+#

 # You should have received a copy of the GNU General Public License
 # You should have received a copy of the GNU General Public License

-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301  USA
-
-## ---------------- ##
-## Default values.  ##
-## ---------------- ##
-
-# Default parser class name.
-m4_define_default([b4_parser_class_name], [parser])
-
-
-
-## ----------------- ##
-## Semantic Values.  ##
-## ----------------- ##
-
-
-# b4_lhs_value([TYPE])
-# --------------------
-# Expansion of $<TYPE>$.
-m4_define([b4_lhs_value],
-[(yyval[]m4_ifval([$1], [.$1]))])
-
-
-# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
-# --------------------------------------
-# Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
-# symbols on RHS.
-m4_define([b4_rhs_value],
-[(yysemantic_stack_@{m4_eval([$1 - $2])@}m4_ifval([$3], [.$3]))])
-
-m4_define_default([b4_location_type], [location])
-m4_define_default([b4_filename_type], [std::string])
-
-# b4_lhs_location()
-# -----------------
-# Expansion of @$.
-m4_define([b4_lhs_location],
-[(yyloc)])
-
-
-# b4_rhs_location(RULE-LENGTH, NUM)
-# ---------------------------------
-# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
-# on RHS.
-m4_define([b4_rhs_location],
-[(yylocation_stack_@{m4_eval([$1 - $2])@})])
-
-
-# b4_parse_param_decl
-# -------------------
-# Extra formal arguments of the constructor.
-# Change the parameter names from "foo" into "foo_yyarg", so that
-# there is no collision bw the user chosen attribute name, and the
-# argument name in the constructor.
-m4_define([b4_parse_param_decl],
-[m4_ifset([b4_parse_param],
-          [m4_map_sep([b4_parse_param_decl_1], [, ], [b4_parse_param])])])
-
-m4_define([b4_parse_param_decl_1],
-[$1_yyarg])
-
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.

 
 

+m4_include(b4_pkgdatadir/[c++.m4])

 
 

-# b4_parse_param_cons
-# -------------------
-# Extra initialisations of the constructor.
-m4_define([b4_parse_param_cons],
-          [m4_ifset([b4_parse_param],
-                   [,
-      b4_cc_constructor_calls(b4_parse_param)])])
-m4_define([b4_cc_constructor_calls],
-         [m4_map_sep([b4_cc_constructor_call], [,
-      ], [$@])])
-m4_define([b4_cc_constructor_call],
-         [$2 ($2_yyarg)])
-
-# b4_parse_param_vars
-# -------------------
-# Extra instance variables.
-m4_define([b4_parse_param_vars],
-          [m4_ifset([b4_parse_param],
-                   [
-    /* User arguments.  */
-b4_cc_var_decls(b4_parse_param)])])
-m4_define([b4_cc_var_decls],
-         [m4_map_sep([b4_cc_var_decl], [
-], [$@])])
-m4_define([b4_cc_var_decl],
-         [    $1;])
+m4_define([b4_parser_class_name],
+          [b4_percent_define_get([[parser_class_name]])])

 
 

+# The header is mandatory.
+b4_defines_if([],
+              [b4_fatal([b4_skeleton[: using %%defines is mandatory]])])

 
 

+b4_percent_define_ifdef([[location_type]], [],
+  [# Backward compatibility.
+  m4_define([b4_location_constructors])
+  m4_include(b4_pkgdatadir/[location.cc])])
+m4_include(b4_pkgdatadir/[stack.hh])

 
 # We do want M4 expansion after # for CPP macros.
 m4_changecom()
 
 # We do want M4 expansion after # for CPP macros.
 m4_changecom()

-m4_divert(0)dnl
-m4_if(b4_defines_flag, 0, [],
-[@output @output_header_name@
-b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison],
-             [2002, 2003, 2004, 2005])[
-/* FIXME: This is wrong, we want computed header guards.
-   I don't know why the macros are missing now. :( */
-#ifndef PARSER_HEADER_H
-# define PARSER_HEADER_H
-
-#include <string>
-#include <iostream>
-
-/* Using locations.  */
-#define YYLSP_NEEDED ]b4_locations_flag[
-
-namespace yy
-{
-  class position;
-  class location;
-}
+m4_divert_push(0)dnl
+b4_defines_if(
+[@output(b4_spec_defines_file@)@
+b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++],
+             [2002-2012])
+[
+/**
+ ** \file ]b4_spec_defines_file[
+ ** Define the ]b4_namespace_ref[::parser class.
+ */

 
 

-]b4_token_enums(b4_tokens)[
+/* C++ LALR(1) parser skeleton written by Akim Demaille.  */

 
 

-/* Copy the first part of user declarations.  */
-]b4_pre_prologue[
+]b4_cpp_guard_open([b4_spec_defines_file])[

 
 

-]/* Line __line__ of lalr1.cc.  */
-b4_syncline([@oline@], [@ofile@])[
+]b4_percent_code_get([[requires]])[

 
 

+#include <string>
+#include <iostream>

 #include "stack.hh"
 #include "stack.hh"

-#include "location.hh"
-
-/* Enabling traces.  */
-#ifndef YYDEBUG
-# define YYDEBUG ]b4_debug[
-#endif
-
-/* Enabling verbose error messages.  */
-#ifdef YYERROR_VERBOSE
-# undef YYERROR_VERBOSE
-# define YYERROR_VERBOSE 1
-#else
-# define YYERROR_VERBOSE ]b4_error_verbose[
-#endif
-
-/* Enabling the token table.  */
-#ifndef YYTOKEN_TABLE
-# define YYTOKEN_TABLE ]b4_token_table[
-#endif
+]b4_percent_define_ifdef([[location_type]], [],
+                         [[#include "location.hh"]])[

 
 

-#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
-]m4_ifdef([b4_stype],
-[b4_syncline([b4_stype_line], [b4_file_name])
-union YYSTYPE b4_stype;
-/* Line __line__ of lalr1.cc.  */
-b4_syncline([@oline@], [@ofile@])],
-[typedef int YYSTYPE;])[
-# define yystype YYSTYPE /* obsolescent; will be withdrawn */
-# define YYSTYPE_IS_DECLARED 1
-# define YYSTYPE_IS_TRIVIAL 1
-#endif
+]b4_YYDEBUG_define[

 
 

-/* Copy the second part of user declarations.  */
-]b4_post_prologue[
+]b4_namespace_open[

 
 

-]/* Line __line__ of lalr1.cc.  */
-b4_syncline([@oline@], [@ofile@])[
-/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
-   If N is 0, then set CURRENT to the empty location which ends
-   the previous symbol: RHS[0] (always defined).  */
-
-#ifndef YYLLOC_DEFAULT
-# define YYLLOC_DEFAULT(Current, Rhs, N)               \
-do {                                                   \
-  if (N)                                               \
-    {                                                  \
-      (Current).begin = (Rhs)[1].begin;                        \
-      (Current).end   = (Rhs)[N].end;                  \
-    }                                                  \
-  else                                                 \
-    {                                                  \
-      (Current).begin = (Current).end = (Rhs)[0].end;  \
-    }                                                  \
-} while (0)
-#endif
-
-namespace yy
-{
-  class ]b4_parser_class_name[;
-
-  template <typename P>
-  struct traits
-  {
-  };
-
-  template <>
-  struct traits<]b4_parser_class_name[>
-  {
-    typedef ]b4_int_type_for([b4_translate])[ token_number_type;
-    typedef ]b4_int_type_for([b4_rhs])[       rhs_number_type;
-    typedef int state_type;
-    typedef YYSTYPE semantic_type;
-    typedef ]b4_location_type[ location_type;
-  };
-}
-
-namespace yy
-{

   /// A Bison parser.
   class ]b4_parser_class_name[
   {
   /// A Bison parser.
   class ]b4_parser_class_name[
   {

+  public:

     /// Symbol semantic values.
     /// Symbol semantic values.

-    typedef traits<]b4_parser_class_name[>::semantic_type semantic_type;
+#ifndef ]b4_api_PREFIX[STYPE
+]m4_ifdef([b4_stype],
+[    union semantic_type
+    {
+b4_user_stype
+    };],
+[m4_if(b4_tag_seen_flag, 0,
+[[    typedef int semantic_type;]],
+[[    typedef ]b4_api_PREFIX[STYPE semantic_type;]])])[
+#else
+    typedef ]b4_api_PREFIX[STYPE semantic_type;
+#endif

     /// Symbol locations.
     /// Symbol locations.

-    typedef traits<]b4_parser_class_name[>::location_type location_type;
-
-  public:
-    /// Build a parser object.
-    ]b4_parser_class_name[ (]b4_parse_param_decl[) :
-      yydebug_ (false),
-      yycdebug_ (&std::cerr)]b4_parse_param_cons[
+    typedef ]b4_percent_define_get([[location_type]],
+                                   [[location]])[ location_type;
+    /// Tokens.
+    struct token

     {
     {

-    }
+      ]b4_token_enums(b4_tokens)[
+    };
+    /// Token type.
+    typedef token::yytokentype token_type;

 
 

-    virtual ~]b4_parser_class_name[ ()
-    {
-    }
+    /// Build a parser object.
+    ]b4_parser_class_name[ (]b4_parse_param_decl[);
+    virtual ~]b4_parser_class_name[ ();

 
     /// Parse.
     /// \returns  0 iff parsing succeeded.
     virtual int parse ();
 
 
     /// Parse.
     /// \returns  0 iff parsing succeeded.
     virtual int parse ();
 

+#if ]b4_api_PREFIX[DEBUG

     /// The current debugging stream.
     std::ostream& debug_stream () const;
     /// Set the current debugging stream.
     /// The current debugging stream.
     std::ostream& debug_stream () const;
     /// Set the current debugging stream.


@@ -255,6 +107,7 @@ namespace yy
     debug_level_type debug_level () const;
     /// Set the current debugging level.
     void set_debug_level (debug_level_type l);
     debug_level_type debug_level () const;
     /// Set the current debugging level.
     void set_debug_level (debug_level_type l);

+#endif

 
   private:
     /// Report a syntax error.
 
   private:
     /// Report a syntax error.


@@ -263,22 +116,30 @@ namespace yy
     virtual void error (const location_type& loc, const std::string& msg);
 
     /// Generate an error message.
     virtual void error (const location_type& loc, const std::string& msg);
 
     /// Generate an error message.

-    /// \param tok    the look-ahead token.
-    virtual std::string yysyntax_error_ (int tok);
+    /// \param state   the state where the error occurred.
+    /// \param tok     the lookahead token.
+    virtual std::string yysyntax_error_ (int yystate, int tok);

 
 

-#if YYDEBUG
+#if ]b4_api_PREFIX[DEBUG
+    /// \brief Report a symbol value on the debug stream.
+    /// \param yytype       The token type.
+    /// \param yyvaluep     Its semantic value.
+    /// \param yylocationp  Its location.
+    virtual void yy_symbol_value_print_ (int yytype,
+                                        const semantic_type* yyvaluep,
+                                        const location_type* yylocationp);

     /// \brief Report a symbol on the debug stream.
     /// \param yytype       The token type.
     /// \param yyvaluep     Its semantic value.
     /// \param yylocationp  Its location.
     /// \brief Report a symbol on the debug stream.
     /// \param yytype       The token type.
     /// \param yyvaluep     Its semantic value.
     /// \param yylocationp  Its location.

-    virtual void yysymprint_ (int yytype,
-                             const semantic_type* yyvaluep,
-                             const location_type* yylocationp);
-#endif /* ! YYDEBUG */
+    virtual void yy_symbol_print_ (int yytype,
+                                  const semantic_type* yyvaluep,
+                                  const location_type* yylocationp);
+#endif

 
 
     /// State numbers.
 
 
     /// State numbers.

-    typedef traits<]b4_parser_class_name[>::state_type state_type;
+    typedef int state_type;

     /// State stack type.
     typedef stack<state_type>    state_stack_type;
     /// Semantic value stack type.
     /// State stack type.
     typedef stack<state_type>    state_stack_type;
     /// Semantic value stack type.


@@ -293,14 +154,22 @@ namespace yy
     /// The location stack.
     location_stack_type yylocation_stack_;
 
     /// The location stack.
     location_stack_type yylocation_stack_;
 

+    /// Whether the given \c yypact_ value indicates a defaulted state.
+    /// \param yyvalue   the value to check
+    static bool yy_pact_value_is_default_ (int yyvalue);
+
+    /// Whether the given \c yytable_ value indicates a syntax error.
+    /// \param yyvalue   the value to check
+    static bool yy_table_value_is_error_ (int yyvalue);
+

     /// Internal symbol numbers.
     /// Internal symbol numbers.

-    typedef traits<]b4_parser_class_name[>::token_number_type token_number_type;
+    typedef ]b4_int_type_for([b4_translate])[ token_number_type;

     /* Tables.  */
     /// For a state, the index in \a yytable_ of its portion.
     static const ]b4_int_type_for([b4_pact])[ yypact_[];
     static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_;
 
     /* Tables.  */
     /// For a state, the index in \a yytable_ of its portion.
     static const ]b4_int_type_for([b4_pact])[ yypact_[];
     static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_;
 

-    /// For a state, default rule to reduce.
+    /// For a state, default reduction number.

     /// Unless\a  yytable_ specifies something else to do.
     /// Zero means the default is an error.
     static const ]b4_int_type_for([b4_defact])[ yydefact_[];
     /// Unless\a  yytable_ specifies something else to do.
     /// Zero means the default is an error.
     static const ]b4_int_type_for([b4_defact])[ yydefact_[];


@@ -324,21 +193,17 @@ namespace yy
     /// For a rule, its LHS.
     static const ]b4_int_type_for([b4_r1])[ yyr1_[];
     /// For a rule, its RHS length.
     /// For a rule, its LHS.
     static const ]b4_int_type_for([b4_r1])[ yyr1_[];
     /// For a rule, its RHS length.

-    static const ]b4_int_type_for([b4_r2])[ yyr2_[];
-
-#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
-    /// For a symbol, its name in clear.
-    static const char* const yytname_[];
-#endif
+    static const ]b4_int_type_for([b4_r2])[ yyr2_[]; ]b4_error_verbose_if([

 
 

-#if YYERROR_VERBOSE

     /// Convert the symbol name \a n to a form suitable for a diagnostic.
     /// Convert the symbol name \a n to a form suitable for a diagnostic.

-    virtual std::string yytnamerr_ (const char *n);
-#endif
+    static std::string yytnamerr_ (const char *n);])[

 
 

-#if YYDEBUG
+]b4_token_table_if([], [[#if ]b4_api_PREFIX[DEBUG]])[
+    /// For a symbol, its name in clear.
+    static const char* const yytname_[];
+]b4_token_table_if([[#if ]b4_api_PREFIX[DEBUG]])[

     /// A type to store symbol numbers and -1.
     /// A type to store symbol numbers and -1.

-    typedef traits<]b4_parser_class_name[>::rhs_number_type rhs_number_type;
+    typedef ]b4_int_type_for([b4_rhs])[ rhs_number_type;

     /// A `-1'-separated list of the rules' RHS.
     static const rhs_number_type yyrhs_[];
     /// For each rule, the index of the first RHS symbol in \a yyrhs_.
     /// A `-1'-separated list of the rules' RHS.
     static const rhs_number_type yyrhs_[];
     /// For each rule, the index of the first RHS symbol in \a yyrhs_.


@@ -348,13 +213,17 @@ namespace yy
     /// For each scanner token number, its symbol number.
     static const ]b4_int_type_for([b4_toknum])[ yytoken_number_[];
     /// Report on the debug stream that the rule \a r is going to be reduced.
     /// For each scanner token number, its symbol number.
     static const ]b4_int_type_for([b4_toknum])[ yytoken_number_[];
     /// Report on the debug stream that the rule \a r is going to be reduced.

-    virtual void yyreduce_print_ (int r);
+    virtual void yy_reduce_print_ (int r);

     /// Print the state stack on the debug stream.
     virtual void yystack_print_ ();
     /// Print the state stack on the debug stream.
     virtual void yystack_print_ ();

+
+    /* Debugging.  */
+    int yydebug_;
+    std::ostream* yycdebug_;

 #endif
 
 #endif
 

-    /// Convert a scanner token number to a symbol number.
-    inline token_number_type yytranslate_ (int token);
+    /// Convert a scanner token number \a t to a symbol number.
+    token_number_type yytranslate_ (int t);

 
     /// \brief Reclaim the memory associated to a symbol.
     /// \param yymsg        Why this token is reclaimed.
 
     /// \brief Reclaim the memory associated to a symbol.
     /// \param yymsg        Why this token is reclaimed.


@@ -362,9 +231,9 @@ namespace yy
     /// \param yyvaluep     Its semantic value.
     /// \param yylocationp  Its location.
     inline void yydestruct_ (const char* yymsg,
     /// \param yyvaluep     Its semantic value.
     /// \param yylocationp  Its location.
     inline void yydestruct_ (const char* yymsg,

-                             int yytype,
-                             semantic_type* yyvaluep,
-                             location_type* yylocationp);
+                            int yytype,
+                            semantic_type* yyvaluep,
+                            location_type* yylocationp);

 
     /// Pop \a n symbols the three stacks.
     inline void yypop_ (unsigned int n = 1);
 
     /// Pop \a n symbols the three stacks.
     inline void yypop_ (unsigned int n = 1);


@@ -381,39 +250,44 @@ namespace yy
     static const int yyntokens_;
     static const unsigned int yyuser_token_number_max_;
     static const token_number_type yyundef_token_;
     static const int yyntokens_;
     static const unsigned int yyuser_token_number_max_;
     static const token_number_type yyundef_token_;

-
-    /* State.  */
-    int yyn_;
-    int yylen_;
-    int yystate_;
-
-    /* Error handling. */
-    int yynerrs_;
-    int yyerrstatus_;
-
-    /* Debugging.  */
-    int yydebug_;
-    std::ostream* yycdebug_;
-

 ]b4_parse_param_vars[
   };
 ]b4_parse_param_vars[
   };

-}
+]b4_namespace_close[

 
 

-#endif /* ! defined PARSER_HEADER_H */]
+]b4_percent_define_flag_if([[global_tokens_and_yystype]],
+[b4_token_defines(b4_tokens)
+
+#ifndef ]b4_api_PREFIX[STYPE
+ /* Redirection for backward compatibility.  */
+# define ]b4_api_PREFIX[STYPE b4_namespace_ref::b4_parser_class_name::semantic_type
+#endif
+])[
+]b4_percent_code_get([[provides]])[
+]b4_cpp_guard_close([b4_spec_defines_file])

 ])dnl
 ])dnl

-@output @output_parser_name@
-b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison],
-             [2002, 2003, 2004, 2005])
-m4_if(b4_prefix[], [yy], [],
+@output(b4_parser_file_name@)@
+b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++],
+             [2002-2012])
+b4_percent_code_get([[top]])[]dnl
+m4_if(b4_prefix, [yy], [],

 [
 // Take the name prefix into account.
 [
 // Take the name prefix into account.

-#define yylex   b4_prefix[]lex])
-m4_if(b4_defines_flag, 0, [],
-[
-#include @output_header_name@])[
+#define yylex   b4_prefix[]lex])[
+
+/* First part of user declarations.  */
+]b4_user_pre_prologue[
+
+]b4_defines_if([[
+#include "@basename(]b4_spec_defines_file[@)"]])[
+
+/* User implementation prologue.  */
+]b4_user_post_prologue[
+]b4_percent_code_get[
+
+]b4_null_define[

 
 #ifndef YY_
 
 #ifndef YY_

-# if YYENABLE_NLS
+# if defined YYENABLE_NLS && YYENABLE_NLS

 #  if ENABLE_NLS
 #   include <libintl.h> /* FIXME: INFRINGES ON USER NAME SPACE */
 #   define YY_(msgid) dgettext ("bison-runtime", msgid)
 #  if ENABLE_NLS
 #   include <libintl.h> /* FIXME: INFRINGES ON USER NAME SPACE */
 #   define YY_(msgid) dgettext ("bison-runtime", msgid)


@@ -424,1022 +298,813 @@ m4_if(b4_defines_flag, 0, [],
 # endif
 #endif
 
 # endif
 #endif
 

-/* A pseudo ostream that takes yydebug_ into account. */
-# define YYCDEBUG                                                      \
-  for (bool yydebugcond_ = yydebug_; yydebugcond_; yydebugcond_ = false)       \
-    (*yycdebug_)
+#define YYRHSLOC(Rhs, K) ((Rhs)[K])
+]b4_yylloc_default_define[
+
+/* Suppress unused-variable warnings by "using" E.  */
+#define YYUSE(e) ((void) (e))

 
 /* Enable debugging if requested.  */
 
 /* Enable debugging if requested.  */

-#if YYDEBUG
+#if ]b4_api_PREFIX[DEBUG
+
+/* A pseudo ostream that takes yydebug_ into account.  */
+# define YYCDEBUG if (yydebug_) (*yycdebug_)

 
 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
 do {                                                   \
   if (yydebug_)                                                \
     {                                                  \
 
 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
 do {                                                   \
   if (yydebug_)                                                \
     {                                                  \

-      *yycdebug_ << (Title) << ' ';                    \
-      yysymprint_ ((Type), (Value), (Location));       \
+      *yycdebug_ << Title << ' ';                      \
+      yy_symbol_print_ ((Type), (Value), (Location));  \

       *yycdebug_ << std::endl;                         \
     }                                                  \
       *yycdebug_ << std::endl;                         \
     }                                                  \

-} while (0)
+} while (false)

 
 # define YY_REDUCE_PRINT(Rule)         \
 do {                                   \
   if (yydebug_)                                \
 
 # define YY_REDUCE_PRINT(Rule)         \
 do {                                   \
   if (yydebug_)                                \

-    yyreduce_print_ (Rule);            \
-} while (0)
+    yy_reduce_print_ (Rule);           \
+} while (false)

 
 # define YY_STACK_PRINT()              \
 do {                                   \
   if (yydebug_)                                \
     yystack_print_ ();                 \
 
 # define YY_STACK_PRINT()              \
 do {                                   \
   if (yydebug_)                                \
     yystack_print_ ();                 \

-} while (0)
+} while (false)

 
 

-#else /* !YYDEBUG */
+#else /* !]b4_api_PREFIX[DEBUG */

 
 

+# define YYCDEBUG if (false) std::cerr

 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
 # define YY_REDUCE_PRINT(Rule)
 # define YY_STACK_PRINT()
 
 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
 # define YY_REDUCE_PRINT(Rule)
 # define YY_STACK_PRINT()
 

-#endif /* !YYDEBUG */
+#endif /* !]b4_api_PREFIX[DEBUG */
+
+#define yyerrok                (yyerrstatus_ = 0)
+#define yyclearin      (yychar = yyempty_)

 
 #define YYACCEPT       goto yyacceptlab
 #define YYABORT                goto yyabortlab
 #define YYERROR                goto yyerrorlab
 
 #define YYACCEPT       goto yyacceptlab
 #define YYABORT                goto yyabortlab
 #define YYERROR                goto yyerrorlab

+#define YYRECOVERING()  (!!yyerrstatus_)

 
 

-#if YYERROR_VERBOSE
-
-/* Return YYSTR after stripping away unnecessary quotes and
-   backslashes, so that it's suitable for yyerror.  The heuristic is
-   that double-quoting is unnecessary unless the string contains an
-   apostrophe, a comma, or backslash (other than backslash-backslash).
-   YYSTR is taken from yytname.  */
-std::string
-yy::]b4_parser_class_name[::yytnamerr_ (const char *yystr)
-{
-  if (*yystr == '"')
-    {
-      std::string yyr = "";
-      char const *yyp = yystr;
+]b4_namespace_open[]b4_error_verbose_if([[

 
 

-      for (;;)
-       switch (*++yyp)
-         {
-         case '\'':
-         case ',':
-           goto do_not_strip_quotes;
-
-         case '\\':
-           if (*++yyp != '\\')
-             goto do_not_strip_quotes;
-           /* Fall through.  */
-         default:
-           yyr += *yyp;
-           break;
-
-         case '"':
-           return yyr;
-         }
-    do_not_strip_quotes: ;
-    }
+  /* Return YYSTR after stripping away unnecessary quotes and
+     backslashes, so that it's suitable for yyerror.  The heuristic is
+     that double-quoting is unnecessary unless the string contains an
+     apostrophe, a comma, or backslash (other than backslash-backslash).
+     YYSTR is taken from yytname.  */
+  std::string
+  ]b4_parser_class_name[::yytnamerr_ (const char *yystr)
+  {
+    if (*yystr == '"')
+      {
+        std::string yyr = "";
+        char const *yyp = yystr;
+
+        for (;;)
+          switch (*++yyp)
+            {
+            case '\'':
+            case ',':
+              goto do_not_strip_quotes;
+
+            case '\\':
+              if (*++yyp != '\\')
+                goto do_not_strip_quotes;
+              /* Fall through.  */
+            default:
+              yyr += *yyp;
+              break;
+
+            case '"':
+              return yyr;
+            }
+      do_not_strip_quotes: ;
+      }
+
+    return yystr;
+  }
+]])[
+
+  /// Build a parser object.
+  ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [
+    :])[
+#if ]b4_api_PREFIX[DEBUG
+    ]m4_ifset([b4_parse_param], [  ], [ :])[yydebug_ (false),
+      yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[
+#endif]b4_parse_param_cons[
+  {
+  }

 
 

-  return yystr;
-}
+  ]b4_parser_class_name::~b4_parser_class_name[ ()
+  {
+  }

 
 

-#endif
+#if ]b4_api_PREFIX[DEBUG
+  /*--------------------------------.
+  | Print this symbol on YYOUTPUT.  |
+  `--------------------------------*/

 
 

-#if YYDEBUG
-/*--------------------------------.
-| Print this symbol on YYOUTPUT.  |
-`--------------------------------*/
-
-void
-yy::]b4_parser_class_name[::yysymprint_ (int yytype,
-                         const semantic_type* yyvaluep, const location_type* yylocationp)
-{
-  /* Pacify ``unused variable'' warnings.  */
-  (void) yyvaluep;
-  (void) yylocationp;
-  /* Backward compatibility, but should be removed eventually. */
-  std::ostream& cdebug_ = *yycdebug_;
-  (void) cdebug_;
-
-  *yycdebug_ << (yytype < yyntokens_ ? "token" : "nterm")
-            << ' ' << yytname_[yytype] << " ("
-             << *yylocationp << ": ";
-  switch (yytype)
-    {
-]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
-[      default:
-        break;
-    }
-  *yycdebug_ << ')';
-}
-#endif /* ! YYDEBUG */
-
-void
-yy::]b4_parser_class_name[::yydestruct_ (const char* yymsg,
-                         int yytype, semantic_type* yyvaluep, location_type* yylocationp)
-{
-  /* Pacify ``unused variable'' warnings.  */
-  (void) yymsg;
-  (void) yyvaluep;
-  (void) yylocationp;
-
-  YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
-
-  switch (yytype)
-    {
-]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
-      default:
-        break;
-    }
-}
-
-void
-yy::]b4_parser_class_name[::yypop_ (unsigned int n)
-{
-  yystate_stack_.pop (n);
-  yysemantic_stack_.pop (n);
-  yylocation_stack_.pop (n);
-}
-
-std::ostream&
-yy::]b4_parser_class_name[::debug_stream () const
-{
-  return *yycdebug_;
-}
-
-void
-yy::]b4_parser_class_name[::set_debug_stream (std::ostream& o)
-{
-  yycdebug_ = &o;
-}
-
-
-yy::]b4_parser_class_name[::debug_level_type
-yy::]b4_parser_class_name[::debug_level () const
-{
-  return yydebug_;
-}
-
-void
-yy::]b4_parser_class_name[::set_debug_level (debug_level_type l)
-{
-  yydebug_ = l;
-}
-
-
-int
-yy::]b4_parser_class_name[::parse ()
-{
-  /* Look-ahead and look-ahead in internal form.  */
-  int yylooka;
-  int yyilooka;
-
-  /// Semantic value of the look-ahead.
-  semantic_type yylval;
-  /// Location of the look-ahead.
-  location_type yylloc;
-  /// The locations where the error started and ended.
-  location yyerror_range[2];
-
-  /// $$.
-  semantic_type yyval;
-  /// @@$.
-  location_type yyloc;
-
-  int yyresult_;
-
-  YYCDEBUG << "Starting parse" << std::endl;
-
-  yynerrs_ = 0;
-  yyerrstatus_ = 0;
-
-  /* Start.  */
-  yystate_ = 0;
-  yylooka = yyempty_;
-
-]m4_ifdef([b4_initial_action], [
-m4_pushdef([b4_at_dollar],     [yylloc])dnl
-m4_pushdef([b4_dollar_dollar], [yylval])dnl
-  /* User initialization code. */
-  b4_initial_action
-m4_popdef([b4_dollar_dollar])dnl
-m4_popdef([b4_at_dollar])dnl
-/* Line __line__ of yacc.c.  */
-b4_syncline([@oline@], [@ofile@])])dnl
-
-[  /* Initialize the stacks.  The initial state will be pushed in
-     yynewstate, since the latter expects the semantical and the
-     location values to have been already stored, initialize these
-     stacks with a primary value.  */
-  yystate_stack_ = state_stack_type (0);
-  yysemantic_stack_ = semantic_stack_type (0);
-  yylocation_stack_ = location_stack_type (0);
-  yysemantic_stack_.push (yylval);
-  yylocation_stack_.push (yylloc);
-
-  /* New state.  */
-yynewstate:
-  yystate_stack_.push (yystate_);
-  YYCDEBUG << "Entering state " << yystate_ << std::endl;
-  goto yybackup;
-
-  /* Backup.  */
-yybackup:
-
-  /* Try to take a decision without look-ahead.  */
-  yyn_ = yypact_[yystate_];
-  if (yyn_ == yypact_ninf_)
-    goto yydefault;
-
-  /* Read a look-ahead token.  */
-  if (yylooka == yyempty_)
-    {
-      YYCDEBUG << "Reading a token: ";
-      yylooka = ]b4_c_function_call([yylex], [int],
-[[YYSTYPE*], [&yylval]][]dnl
-b4_location_if([, [[location*], [&yylloc]]])dnl
-m4_ifdef([b4_lex_param], [, ]b4_lex_param))[;
-    }
+  inline void
+  ]b4_parser_class_name[::yy_symbol_value_print_ (int yytype,
+                          const semantic_type* yyvaluep, const location_type* yylocationp)
+  {
+    YYUSE (yylocationp);
+    YYUSE (yyvaluep);
+    std::ostream& yyo = debug_stream ();
+    std::ostream& yyoutput = yyo;
+    YYUSE (yyoutput);
+    switch (yytype)
+      {
+  ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
+[       default:
+         break;
+      }
+  }

 
 
 
 

-  /* Convert token to internal form.  */
-  if (yylooka <= yyeof_)
-    {
-      yylooka = yyilooka = yyeof_;
-      YYCDEBUG << "Now at end of input." << std::endl;
-    }
-  else
-    {
-      yyilooka = yytranslate_ (yylooka);
-      YY_SYMBOL_PRINT ("Next token is", yyilooka, &yylval, &yylloc);
-    }
+  void
+  ]b4_parser_class_name[::yy_symbol_print_ (int yytype,
+                          const semantic_type* yyvaluep, const location_type* yylocationp)
+  {
+    *yycdebug_ << (yytype < yyntokens_ ? "token" : "nterm")
+              << ' ' << yytname_[yytype] << " ("
+              << *yylocationp << ": ";
+    yy_symbol_value_print_ (yytype, yyvaluep, yylocationp);
+    *yycdebug_ << ')';
+  }
+#endif

 
 

-  /* If the proper action on seeing token ILOOKA_ is to reduce or to
-     detect an error, take that action.  */
-  yyn_ += yyilooka;
-  if (yyn_ < 0 || yylast_ < yyn_ || yycheck_[yyn_] != yyilooka)
-    goto yydefault;
+  void
+  ]b4_parser_class_name[::yydestruct_ (const char* yymsg,
+                          int yytype, semantic_type* yyvaluep, location_type* yylocationp)
+  {
+    YYUSE (yylocationp);
+    YYUSE (yymsg);
+    YYUSE (yyvaluep);
+
+    YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
+
+    switch (yytype)
+      {
+  ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
+       default:
+         break;
+      }
+  }

 
 

-  /* Reduce or error.  */
-  yyn_ = yytable_[yyn_];
-  if (yyn_ < 0)
-    {
-      if (yyn_ == yytable_ninf_)
-       goto yyerrlab;
-      else
-       {
-         yyn_ = -yyn_;
-         goto yyreduce;
-       }
-    }
-  else if (yyn_ == 0)
-    goto yyerrlab;
-
-  /* Accept?  */
-  if (yyn_ == yyfinal_)
-    goto yyacceptlab;
-
-  /* Shift the look-ahead token.  */
-  YY_SYMBOL_PRINT ("Shifting", yyilooka, &yylval, &yylloc);
-
-  /* Discard the token being shifted unless it is eof.  */
-  if (yylooka != yyeof_)
-    yylooka = yyempty_;
-
-  yysemantic_stack_.push (yylval);
-  yylocation_stack_.push (yylloc);
-
-  /* Count tokens shifted since error; after three, turn off error
-     status.  */
-  if (yyerrstatus_)
-    --yyerrstatus_;
-
-  yystate_ = yyn_;
-  goto yynewstate;
-
-/*-----------------------------------------------------------.
-| yydefault -- do the default action for the current state.  |
-`-----------------------------------------------------------*/
-yydefault:
-  yyn_ = yydefact_[yystate_];
-  if (yyn_ == 0)
-    goto yyerrlab;
-  goto yyreduce;
-
-/*-----------------------------.
-| yyreduce -- Do a reduction.  |
-`-----------------------------*/
-yyreduce:
-  yylen_ = yyr2_[yyn_];
-  /* If LEN_ is nonzero, implement the default value of the action:
-     `$$ = $1'.  Otherwise, use the top of the stack.
-
-     Otherwise, the following line sets YYVAL to garbage.
-     This behavior is undocumented and Bison
-     users should not rely upon it.  */
-  if (yylen_)
-    yyval = yysemantic_stack_[yylen_ - 1];
-  else
-    yyval = yysemantic_stack_[0];
+  void
+  ]b4_parser_class_name[::yypop_ (unsigned int n)
+  {
+    yystate_stack_.pop (n);
+    yysemantic_stack_.pop (n);
+    yylocation_stack_.pop (n);
+  }

 
 

+#if ]b4_api_PREFIX[DEBUG
+  std::ostream&
+  ]b4_parser_class_name[::debug_stream () const

   {
   {

-    slice<location_type, location_stack_type> slice (yylocation_stack_, yylen_);
-    YYLLOC_DEFAULT (yyloc, slice, yylen_);
+    return *yycdebug_;

   }
   }

-  YY_REDUCE_PRINT (yyn_);
-  switch (yyn_)
-    {
-      ]b4_actions[
-      default: break;
-    }

 
 

-]/* Line __line__ of lalr1.cc.  */
-b4_syncline([@oline@], [@ofile@])[
+  void
+  ]b4_parser_class_name[::set_debug_stream (std::ostream& o)
+  {
+    yycdebug_ = &o;
+  }

 
 

-  yypop_ (yylen_);

 
 

-  YY_STACK_PRINT ();
+  ]b4_parser_class_name[::debug_level_type
+  ]b4_parser_class_name[::debug_level () const
+  {
+    return yydebug_;
+  }

 
 

-  yysemantic_stack_.push (yyval);
-  yylocation_stack_.push (yyloc);
+  void
+  ]b4_parser_class_name[::set_debug_level (debug_level_type l)
+  {
+    yydebug_ = l;
+  }
+#endif

 
 

-  /* Shift the result of the reduction.  */
-  yyn_ = yyr1_[yyn_];
-  yystate_ = yypgoto_[yyn_ - yyntokens_] + yystate_stack_[0];
-  if (0 <= yystate_ && yystate_ <= yylast_
-      && yycheck_[yystate_] == yystate_stack_[0])
-    yystate_ = yytable_[yystate_];
-  else
-    yystate_ = yydefgoto_[yyn_ - yyntokens_];
-  goto yynewstate;
+  inline bool
+  ]b4_parser_class_name[::yy_pact_value_is_default_ (int yyvalue)
+  {
+    return yyvalue == yypact_ninf_;
+  }

 
 

-/*------------------------------------.
-| yyerrlab -- here on detecting error |
-`------------------------------------*/
-yyerrlab:
-  /* If not already recovering from an error, report this error.  */
-  if (!yyerrstatus_)
-    {
-      ++yynerrs_;
-      error (yylloc, yysyntax_error_ (yyilooka));
-    }
+  inline bool
+  ]b4_parser_class_name[::yy_table_value_is_error_ (int yyvalue)
+  {
+    return yyvalue == yytable_ninf_;
+  }

 
 

-  yyerror_range[0] = yylloc;
-  if (yyerrstatus_ == 3)
-    {
-      /* If just tried and failed to reuse look-ahead token after an
-        error, discard it.  */
+  int
+  ]b4_parser_class_name[::parse ()
+  {
+    /// Lookahead and lookahead in internal form.
+    int yychar = yyempty_;
+    int yytoken = 0;

 
 

-      if (yylooka <= yyeof_)
-        {
-         /* Return failure if at end of input.  */
-         if (yylooka == yyeof_)
-           YYABORT;
-        }
-      else
-        {
-          yydestruct_ ("Error: discarding", yyilooka, &yylval, &yylloc);
-          yylooka = yyempty_;
-        }
-    }
+    /* State.  */
+    int yyn;
+    int yylen = 0;
+    int yystate = 0;

 
 

-  /* Else will try to reuse look-ahead token after shifting the error
-     token.  */
-  goto yyerrlab1;
+    /* Error handling.  */
+    int yynerrs_ = 0;
+    int yyerrstatus_ = 0;

 
 

+    /// Semantic value of the lookahead.
+    semantic_type yylval;
+    /// Location of the lookahead.
+    location_type yylloc;
+    /// The locations where the error started and ended.
+    location_type yyerror_range[3];

 
 

-/*---------------------------------------------------.
-| yyerrorlab -- error raised explicitly by YYERROR.  |
-`---------------------------------------------------*/
-yyerrorlab:
+    /// $$.
+    semantic_type yyval;
+    /// @@$.
+    location_type yyloc;

 
 

-  /* Pacify compilers like GCC when the user code never invokes
-     YYERROR and the label yyerrorlab therefore never appears in user
-     code.  */
-  if (false)
-    goto yyerrorlab;
+    int yyresult;

 
 

-  yyerror_range[0] = yylocation_stack_[yylen_ - 1];
-  yypop_ (yylen_);
-  yystate_ = yystate_stack_[0];
-  goto yyerrlab1;
+    YYCDEBUG << "Starting parse" << std::endl;

 
 

-/*-------------------------------------------------------------.
-| yyerrlab1 -- common code for both syntax error and YYERROR.  |
-`-------------------------------------------------------------*/
-yyerrlab1:
-  yyerrstatus_ = 3;    /* Each real token shifted decrements this.  */
+]m4_ifdef([b4_initial_action], [
+m4_pushdef([b4_at_dollar],     [yylloc])dnl
+m4_pushdef([b4_dollar_dollar], [yylval])dnl
+    /* User initialization code.  */
+    b4_user_initial_action
+m4_popdef([b4_dollar_dollar])dnl
+m4_popdef([b4_at_dollar])])dnl
+
+  [  /* Initialize the stacks.  The initial state will be pushed in
+       yynewstate, since the latter expects the semantical and the
+       location values to have been already stored, initialize these
+       stacks with a primary value.  */
+    yystate_stack_ = state_stack_type (0);
+    yysemantic_stack_ = semantic_stack_type (0);
+    yylocation_stack_ = location_stack_type (0);
+    yysemantic_stack_.push (yylval);
+    yylocation_stack_.push (yylloc);
+
+    /* New state.  */
+  yynewstate:
+    yystate_stack_.push (yystate);
+    YYCDEBUG << "Entering state " << yystate << std::endl;
+
+    /* Accept?  */
+    if (yystate == yyfinal_)
+      goto yyacceptlab;
+
+    goto yybackup;
+
+    /* Backup.  */
+  yybackup:
+
+    /* Try to take a decision without lookahead.  */
+    yyn = yypact_[yystate];
+    if (yy_pact_value_is_default_ (yyn))
+      goto yydefault;
+
+    /* Read a lookahead token.  */
+    if (yychar == yyempty_)
+      {
+       YYCDEBUG << "Reading a token: ";
+       yychar = ]b4_c_function_call([yylex], [int],
+                                    [b4_api_PREFIX[STYPE*], [&yylval]][]dnl
+b4_locations_if([, [[location*], [&yylloc]]])dnl
+m4_ifdef([b4_lex_param], [, ]b4_lex_param))[;
+      }
+
+
+    /* Convert token to internal form.  */
+    if (yychar <= yyeof_)
+      {
+       yychar = yytoken = yyeof_;
+       YYCDEBUG << "Now at end of input." << std::endl;
+      }
+    else
+      {
+       yytoken = yytranslate_ (yychar);
+       YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+      }
+
+    /* If the proper action on seeing token YYTOKEN is to reduce or to
+       detect an error, take that action.  */
+    yyn += yytoken;
+    if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yytoken)
+      goto yydefault;
+
+    /* Reduce or error.  */
+    yyn = yytable_[yyn];
+    if (yyn <= 0)
+      {
+       if (yy_table_value_is_error_ (yyn))
+         goto yyerrlab;
+       yyn = -yyn;
+       goto yyreduce;
+      }
+
+    /* Shift the lookahead token.  */
+    YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
+
+    /* Discard the token being shifted.  */
+    yychar = yyempty_;
+
+    yysemantic_stack_.push (yylval);
+    yylocation_stack_.push (yylloc);
+
+    /* Count tokens shifted since error; after three, turn off error
+       status.  */
+    if (yyerrstatus_)
+      --yyerrstatus_;
+
+    yystate = yyn;
+    goto yynewstate;
+
+  /*-----------------------------------------------------------.
+  | yydefault -- do the default action for the current state.  |
+  `-----------------------------------------------------------*/
+  yydefault:
+    yyn = yydefact_[yystate];
+    if (yyn == 0)
+      goto yyerrlab;
+    goto yyreduce;
+
+  /*-----------------------------.
+  | yyreduce -- Do a reduction.  |
+  `-----------------------------*/
+  yyreduce:
+    yylen = yyr2_[yyn];
+    /* If YYLEN is nonzero, implement the default value of the action:
+       `$$ = $1'.  Otherwise, use the top of the stack.
+
+       Otherwise, the following line sets YYVAL to garbage.
+       This behavior is undocumented and Bison
+       users should not rely upon it.  */
+    if (yylen)
+      yyval = yysemantic_stack_[yylen - 1];
+    else
+      yyval = yysemantic_stack_[0];

 
 

-  for (;;)

     {
     {

-      yyn_ = yypact_[yystate_];
-      if (yyn_ != yypact_ninf_)
+      slice<location_type, location_stack_type> slice (yylocation_stack_, yylen);
+      YYLLOC_DEFAULT (yyloc, slice, yylen);
+    }
+    YY_REDUCE_PRINT (yyn);
+    switch (yyn)
+      {
+       ]b4_user_actions[
+       default:
+          break;
+      }
+    /* User semantic actions sometimes alter yychar, and that requires
+       that yytoken be updated with the new translation.  We take the
+       approach of translating immediately before every use of yytoken.
+       One alternative is translating here after every semantic action,
+       but that translation would be missed if the semantic action
+       invokes YYABORT, YYACCEPT, or YYERROR immediately after altering
+       yychar.  In the case of YYABORT or YYACCEPT, an incorrect
+       destructor might then be invoked immediately.  In the case of
+       YYERROR, subsequent parser actions might lead to an incorrect
+       destructor call or verbose syntax error message before the
+       lookahead is translated.  */
+    YY_SYMBOL_PRINT ("-> $$ =", yyr1_[yyn], &yyval, &yyloc);
+
+    yypop_ (yylen);
+    yylen = 0;
+    YY_STACK_PRINT ();
+
+    yysemantic_stack_.push (yyval);
+    yylocation_stack_.push (yyloc);
+
+    /* Shift the result of the reduction.  */
+    yyn = yyr1_[yyn];
+    yystate = yypgoto_[yyn - yyntokens_] + yystate_stack_[0];
+    if (0 <= yystate && yystate <= yylast_
+       && yycheck_[yystate] == yystate_stack_[0])
+      yystate = yytable_[yystate];
+    else
+      yystate = yydefgoto_[yyn - yyntokens_];
+    goto yynewstate;
+
+  /*------------------------------------.
+  | yyerrlab -- here on detecting error |
+  `------------------------------------*/
+  yyerrlab:
+    /* Make sure we have latest lookahead translation.  See comments at
+       user semantic actions for why this is necessary.  */
+    yytoken = yytranslate_ (yychar);
+
+    /* If not already recovering from an error, report this error.  */
+    if (!yyerrstatus_)
+      {
+       ++yynerrs_;
+       if (yychar == yyempty_)
+         yytoken = yyempty_;
+       error (yylloc, yysyntax_error_ (yystate, yytoken));
+      }
+
+    yyerror_range[1] = yylloc;
+    if (yyerrstatus_ == 3)
+      {
+       /* If just tried and failed to reuse lookahead token after an
+        error, discard it.  */
+
+       if (yychar <= yyeof_)
+         {
+         /* Return failure if at end of input.  */
+         if (yychar == yyeof_)
+           YYABORT;
+         }
+       else
+         {
+           yydestruct_ ("Error: discarding", yytoken, &yylval, &yylloc);
+           yychar = yyempty_;
+         }
+      }
+
+    /* Else will try to reuse lookahead token after shifting the error
+       token.  */
+    goto yyerrlab1;
+
+
+  /*---------------------------------------------------.
+  | yyerrorlab -- error raised explicitly by YYERROR.  |
+  `---------------------------------------------------*/
+  yyerrorlab:
+
+    /* Pacify compilers like GCC when the user code never invokes
+       YYERROR and the label yyerrorlab therefore never appears in user
+       code.  */
+    if (false)
+      goto yyerrorlab;
+
+    yyerror_range[1] = yylocation_stack_[yylen - 1];
+    /* Do not reclaim the symbols of the rule which action triggered
+       this YYERROR.  */
+    yypop_ (yylen);
+    yylen = 0;
+    yystate = yystate_stack_[0];
+    goto yyerrlab1;
+
+  /*-------------------------------------------------------------.
+  | yyerrlab1 -- common code for both syntax error and YYERROR.  |
+  `-------------------------------------------------------------*/
+  yyerrlab1:
+    yyerrstatus_ = 3;  /* Each real token shifted decrements this.  */
+
+    for (;;)
+      {
+       yyn = yypact_[yystate];
+       if (!yy_pact_value_is_default_ (yyn))

        {
        {

-         yyn_ += yyterror_;
-         if (0 <= yyn_ && yyn_ <= yylast_ && yycheck_[yyn_] == yyterror_)
+         yyn += yyterror_;
+         if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_)

            {
            {

-             yyn_ = yytable_[yyn_];
-             if (0 < yyn_)
+             yyn = yytable_[yyn];
+             if (0 < yyn)

                break;
            }
        }
 
                break;
            }
        }
 

-      /* Pop the current state because it cannot handle the error token.  */
-      if (yystate_stack_.height () == 1)
+       /* Pop the current state because it cannot handle the error token.  */
+       if (yystate_stack_.height () == 1)

        YYABORT;
 
        YYABORT;
 

-      yyerror_range[0] = yylocation_stack_[0];
-      yydestruct_ ("Error: popping",
-                   yystos_[yystate_],
-                   &yysemantic_stack_[0], &yylocation_stack_[0]);
-      yypop_ ();
-      yystate_ = yystate_stack_[0];
-      YY_STACK_PRINT ();
-    }
-
-  if (yyn_ == yyfinal_)
-    goto yyacceptlab;
-
-  yyerror_range[1] = yylloc;
-  // Using YYLLOC is tempting, but would change the location of
-  // the look-ahead.  YYLOC is available though.
-  YYLLOC_DEFAULT (yyloc, yyerror_range - 1, 2);
-  yysemantic_stack_.push (yylval);
-  yylocation_stack_.push (yyloc);
-
-  /* Shift the error token. */
-  YY_SYMBOL_PRINT ("Shifting", yystos_[yyn_],
-                  &yysemantic_stack_[0], &yylocation_stack_[0]);
-
-  yystate_ = yyn_;
-  goto yynewstate;
-
-  /* Accept.  */
-yyacceptlab:
-  yyresult_ = 0;
-  goto yyreturn;
-
-  /* Abort.  */
-yyabortlab:
-  yyresult_ = 1;
-  goto yyreturn;
-
-yyreturn:
-  if (yylooka != yyeof_ && yylooka != yyempty_)
-    yydestruct_ ("Cleanup: discarding lookahead", yyilooka, &yylval, &yylloc);
-
-  while (yystate_stack_.height () != 1)
-    {
-      yydestruct_ ("Cleanup: popping",
+       yyerror_range[1] = yylocation_stack_[0];
+       yydestruct_ ("Error: popping",
+                    yystos_[yystate],
+                    &yysemantic_stack_[0], &yylocation_stack_[0]);
+       yypop_ ();
+       yystate = yystate_stack_[0];
+       YY_STACK_PRINT ();
+      }
+
+    yyerror_range[2] = yylloc;
+    // Using YYLLOC is tempting, but would change the location of
+    // the lookahead.  YYLOC is available though.
+    YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
+    yysemantic_stack_.push (yylval);
+    yylocation_stack_.push (yyloc);
+
+    /* Shift the error token.  */
+    YY_SYMBOL_PRINT ("Shifting", yystos_[yyn],
+                    &yysemantic_stack_[0], &yylocation_stack_[0]);
+
+    yystate = yyn;
+    goto yynewstate;
+
+    /* Accept.  */
+  yyacceptlab:
+    yyresult = 0;
+    goto yyreturn;
+
+    /* Abort.  */
+  yyabortlab:
+    yyresult = 1;
+    goto yyreturn;
+
+  yyreturn:
+    if (yychar != yyempty_)
+      {
+        /* Make sure we have latest lookahead translation.  See comments
+           at user semantic actions for why this is necessary.  */
+        yytoken = yytranslate_ (yychar);
+        yydestruct_ ("Cleanup: discarding lookahead", yytoken, &yylval,
+                     &yylloc);
+      }
+
+    /* Do not reclaim the symbols of the rule which action triggered
+       this YYABORT or YYACCEPT.  */
+    yypop_ (yylen);
+    while (yystate_stack_.height () != 1)
+      {
+       yydestruct_ ("Cleanup: popping",

                   yystos_[yystate_stack_[0]],
                   &yysemantic_stack_[0],
                   &yylocation_stack_[0]);
                   yystos_[yystate_stack_[0]],
                   &yysemantic_stack_[0],
                   &yylocation_stack_[0]);

-      yypop_ ();
-    }
+       yypop_ ();
+      }

 
 

-  return yyresult_;
-}
-
-// Generate an error message.
-std::string
-yy::]b4_parser_class_name[::yysyntax_error_ (int tok)
-{
-  std::string res;
-#if YYERROR_VERBOSE
-  yyn_ = yypact_[yystate_];
-  if (yypact_ninf_ < yyn_ && yyn_ < yylast_)
-    {
-      /* Start YYX at -YYN if negative to avoid negative indexes in
-         YYCHECK.  */
-      int yyxbegin = yyn_ < 0 ? -yyn_ : 0;
-
-      /* Stay within bounds of both yycheck and yytname.  */
-      int yychecklim = yylast_ - yyn_;
-      int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
-      int count = 0;
-      for (int x = yyxbegin; x < yyxend; ++x)
-        if (yycheck_[x + yyn_] == x && x != yyterror_)
-          ++count;
-
-      // FIXME: This method of building the message is not compatible
-      // with internationalization.  It should work like yacc.c does it.
-      // That is, first build a string that looks like this:
-      // "syntax error, unexpected %s or %s or %s"
-      // Then, invoke YY_ on this string.
-      // Finally, use the string as a format to output
-      // yytname_[tok], etc.
-      // Until this gets fixed, this message appears in English only.
-      res = "syntax error, unexpected ";
-      res += yytnamerr_ (yytname_[tok]);
-      if (count < 5)
+    return yyresult;
+  }
+
+  // Generate an error message.
+  std::string
+  ]b4_parser_class_name[::yysyntax_error_ (]dnl
+b4_error_verbose_if([int yystate, int yytoken],
+                    [int, int])[)
+  {]b4_error_verbose_if([[
+    std::string yyres;
+    // Number of reported tokens (one for the "unexpected", one per
+    // "expected").
+    size_t yycount = 0;
+    // Its maximum.
+    enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
+    // Arguments of yyformat.
+    char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
+
+    /* There are many possibilities here to consider:
+       - If this state is a consistent state with a default action, then
+         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
+         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
+         report.  In that case, just report a simple "syntax error".
+       - Don't assume there isn't a lookahead just because this state is
+         a consistent state with a default action.  There might have
+         been a previous inconsistent state, consistent state with a
+         non-default action, or user semantic action that manipulated
+         yychar.
+       - Of course, the expected token list depends on states to have
+         correct lookahead information, and it depends on the parser not
+         to perform extra reductions after fetching a lookahead from the
+         scanner and before detecting a syntax error.  Thus, state
+         merging (from LALR or IELR) and default reductions corrupt the
+         expected token list.  However, the list is correct for
+         canonical LR with one exception: it will still contain any
+         token that will not be accepted due to an error action in a
+         later state.
+    */
+    if (yytoken != yyempty_)
+      {
+        yyarg[yycount++] = yytname_[yytoken];
+        int yyn = yypact_[yystate];
+        if (!yy_pact_value_is_default_ (yyn))
+          {
+            /* Start YYX at -YYN if negative to avoid negative indexes in
+               YYCHECK.  In other words, skip the first -YYN actions for
+               this state because they are default actions.  */
+            int yyxbegin = yyn < 0 ? -yyn : 0;
+            /* Stay within bounds of both yycheck and yytname.  */
+            int yychecklim = yylast_ - yyn + 1;
+            int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
+            for (int yyx = yyxbegin; yyx < yyxend; ++yyx)
+              if (yycheck_[yyx + yyn] == yyx && yyx != yyterror_
+                  && !yy_table_value_is_error_ (yytable_[yyx + yyn]))
+                {
+                  if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
+                    {
+                      yycount = 1;
+                      break;
+                    }
+                  else
+                    yyarg[yycount++] = yytname_[yyx];
+                }
+          }
+      }
+
+    char const* yyformat = YY_NULL;
+    switch (yycount)
+      {
+#define YYCASE_(N, S)                         \
+        case N:                               \
+          yyformat = S;                       \
+        break
+        YYCASE_(0, YY_("syntax error"));
+        YYCASE_(1, YY_("syntax error, unexpected %s"));
+        YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
+        YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
+        YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
+        YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
+#undef YYCASE_
+      }
+
+    // Argument number.
+    size_t yyi = 0;
+    for (char const* yyp = yyformat; *yyp; ++yyp)
+      if (yyp[0] == '%' && yyp[1] == 's' && yyi < yycount)

         {
         {

-          count = 0;
-          for (int x = yyxbegin; x < yyxend; ++x)
-            if (yycheck_[x + yyn_] == x && x != yyterror_)
-              {
-                res += (!count++) ? ", expecting " : " or ";
-                res += yytnamerr_ (yytname_[x]);
-              }
+          yyres += yytnamerr_ (yyarg[yyi++]);
+          ++yyp;

         }
         }

-    }
-  else
-#endif
-    res = YY_("syntax error");
-  return res;
-}
-
-
-/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
-   STATE-NUM.  */
-const ]b4_int_type(b4_pact_ninf, b4_pact_ninf) yy::b4_parser_class_name::yypact_ninf_ = b4_pact_ninf[;
-const ]b4_int_type_for([b4_pact])[
-yy::]b4_parser_class_name[::yypact_[] =
-{
-  ]b4_pact[
-};
-
-/* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE
-   doesn't specify something else to do.  Zero means the default is an
-   error.  */
-const ]b4_int_type_for([b4_defact])[
-yy::]b4_parser_class_name[::yydefact_[] =
-{
-  ]b4_defact[
-};
-
-/* YYPGOTO[NTERM-NUM].  */
-const ]b4_int_type_for([b4_pgoto])[
-yy::]b4_parser_class_name[::yypgoto_[] =
-{
-  ]b4_pgoto[
-};
-
-/* YYDEFGOTO[NTERM-NUM].  */
-const ]b4_int_type_for([b4_defgoto])[
-yy::]b4_parser_class_name[::yydefgoto_[] =
-{
-  ]b4_defgoto[
-};
-
-/* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
-   positive, shift that token.  If negative, reduce the rule which
-   number is the opposite.  If zero, do what YYDEFACT says.  */
-const ]b4_int_type(b4_table_ninf, b4_table_ninf) yy::b4_parser_class_name::yytable_ninf_ = b4_table_ninf[;
-const ]b4_int_type_for([b4_table])[
-yy::]b4_parser_class_name[::yytable_[] =
-{
-  ]b4_table[
-};
-
-/* YYCHECK.  */
-const ]b4_int_type_for([b4_check])[
-yy::]b4_parser_class_name[::yycheck_[] =
-{
-  ]b4_check[
-};
-
-/* STOS_[STATE-NUM] -- The (internal number of the) accessing
-   symbol of state STATE-NUM.  */
-const ]b4_int_type_for([b4_stos])[
-yy::]b4_parser_class_name[::yystos_[] =
-{
-  ]b4_stos[
-};
-
-#if YYDEBUG
-/* TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding
-   to YYLEX-NUM.  */
-const ]b4_int_type_for([b4_toknum])[
-yy::]b4_parser_class_name[::yytoken_number_[] =
-{
-  ]b4_toknum[
-};
-#endif
+      else
+        yyres += *yyp;
+    return yyres;]], [[
+    return YY_("syntax error");]])[
+  }

 
 

-/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
-const ]b4_int_type_for([b4_r1])[
-yy::]b4_parser_class_name[::yyr1_[] =
-{
-  ]b4_r1[
-};
-
-/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
-const ]b4_int_type_for([b4_r2])[
-yy::]b4_parser_class_name[::yyr2_[] =
-{
-  ]b4_r2[
-};
-
-#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
-/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
-   First, the terminals, then, starting at \a yyntokens_, nonterminals. */
-const char*
-const yy::]b4_parser_class_name[::yytname_[] =
-{
-  ]b4_tname[
-};
-#endif

 
 

-#if YYDEBUG
-/* YYRHS -- A `-1'-separated list of the rules' RHS. */
-const yy::]b4_parser_class_name[::rhs_number_type
-yy::]b4_parser_class_name[::yyrhs_[] =
-{
-  ]b4_rhs[
-};
-
-/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
-   YYRHS.  */
-const ]b4_int_type_for([b4_prhs])[
-yy::]b4_parser_class_name[::yyprhs_[] =
-{
-  ]b4_prhs[
-};
-
-/* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
-const ]b4_int_type_for([b4_rline])[
-yy::]b4_parser_class_name[::yyrline_[] =
-{
-  ]b4_rline[
-};
-
-// Print the state stack on the debug stream.
-void
-yy::]b4_parser_class_name[::yystack_print_ ()
-{
-  *yycdebug_ << "Stack now";
-  for (state_stack_type::const_iterator i = yystate_stack_.begin ();
-       i != yystate_stack_.end (); ++i)
-    *yycdebug_ << ' ' << *i;
-  *yycdebug_ << std::endl;
-}
-
-// Report on the debug stream that the rule \a yyrule is going to be reduced.
-void
-yy::]b4_parser_class_name[::yyreduce_print_ (int yyrule)
-{
-  unsigned int yylno = yyrline_[yyrule];
-  /* Print the symbols being reduced, and their result.  */
-  *yycdebug_ << "Reducing stack by rule " << yyn_ - 1
-             << " (line " << yylno << "), ";
-  for (]b4_int_type_for([b4_prhs])[ i = yyprhs_[yyn_];
-       0 <= yyrhs_[i]; ++i)
-    *yycdebug_ << yytname_[yyrhs_[i]] << ' ';
-  *yycdebug_ << "-> " << yytname_[yyr1_[yyn_]] << std::endl;
-}
-#endif // YYDEBUG
-
-/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
-yy::]b4_parser_class_name[::token_number_type
-yy::]b4_parser_class_name[::yytranslate_ (int token)
-{
-  static
-  const token_number_type
-  translate_table[] =
+  /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
+     STATE-NUM.  */
+  const ]b4_int_type(b4_pact_ninf, b4_pact_ninf) b4_parser_class_name::yypact_ninf_ = b4_pact_ninf[;
+  const ]b4_int_type_for([b4_pact])[
+  ]b4_parser_class_name[::yypact_[] =

   {
   {

-    ]b4_translate[
+    ]b4_pact[

   };
   };

-  if ((unsigned int) token <= yyuser_token_number_max_)
-    return translate_table[token];
-  else
-    return yyundef_token_;
-}
-
-const int yy::]b4_parser_class_name[::yyeof_ = 0;
-const int yy::]b4_parser_class_name[::yylast_ = ]b4_last[;
-const int yy::]b4_parser_class_name[::yynnts_ = ]b4_nterms_number[;
-const int yy::]b4_parser_class_name[::yyempty_ = -2;
-const int yy::]b4_parser_class_name[::yyfinal_ = ]b4_final_state_number[;
-const int yy::]b4_parser_class_name[::yyterror_ = 1;
-const int yy::]b4_parser_class_name[::yyerrcode_ = 256;
-const int yy::]b4_parser_class_name[::yyntokens_ = ]b4_tokens_number[;
-
-const unsigned int yy::]b4_parser_class_name[::yyuser_token_number_max_ = ]b4_user_token_number_max[;
-const yy::]b4_parser_class_name[::token_number_type yy::]b4_parser_class_name[::yyundef_token_ = ]b4_undef_token_number[;
-
-]b4_epilogue
-dnl
-@output stack.hh
-b4_copyright([stack handling for Bison C++ parsers], [2002, 2003, 2004, 2005])[
-
-#ifndef BISON_STACK_HH
-# define BISON_STACK_HH
-
-#include <deque>

 
 

-namespace yy
-{
-  template <class T, class S = std::deque<T> >
-  class stack
+  /* YYDEFACT[S] -- default reduction number in state S.  Performed when
+     YYTABLE doesn't specify something else to do.  Zero means the
+     default is an error.  */
+  const ]b4_int_type_for([b4_defact])[
+  ]b4_parser_class_name[::yydefact_[] =

   {
   {

-  public:
-
-    // Hide our reversed order.
-    typedef typename S::reverse_iterator iterator;
-    typedef typename S::const_reverse_iterator const_iterator;
-
-    stack () : seq_ ()
-    {
-    }
-
-    stack (unsigned int n) : seq_ (n)
-    {
-    }
-
-    inline
-    T&
-    operator [] (unsigned int i)
-    {
-      return seq_[i];
-    }
-
-    inline
-    const T&
-    operator [] (unsigned int i) const
-    {
-      return seq_[i];
-    }
-
-    inline
-    void
-    push (const T& t)
-    {
-      seq_.push_front (t);
-    }
-
-    inline
-    void
-    pop (unsigned int n = 1)
-    {
-      for (; n; --n)
-       seq_.pop_front ();
-    }
-
-    inline
-    unsigned int
-    height () const
-    {
-      return seq_.size ();
-    }
-
-    inline const_iterator begin () const { return seq_.rbegin (); }
-    inline const_iterator end () const { return seq_.rend (); }
-
-  private:
-
-    S seq_;
+    ]b4_defact[

   };
 
   };
 

-  /// Present a slice of the top of a stack.
-  template <class T, class S = stack<T> >
-  class slice
+  /* YYPGOTO[NTERM-NUM].  */
+  const ]b4_int_type_for([b4_pgoto])[
+  ]b4_parser_class_name[::yypgoto_[] =

   {
   {

-  public:
-
-    slice (const S& stack,
-          unsigned int range) : stack_ (stack),
-                                range_ (range)
-    {
-    }
-
-    inline
-    const T&
-    operator [] (unsigned int i) const
-    {
-      return stack_[range_ - i];
-    }
-
-  private:
-
-    const S& stack_;
-    unsigned int range_;
+    ]b4_pgoto[

   };
   };

-}
-
-#endif // not BISON_STACK_HH]
-dnl
-@output position.hh
-b4_copyright([Position class for Bison C++ parsers], [2002, 2003, 2004, 2005])[
-
-/**
- ** \file position.hh
- ** Define the position class.
- */
-
-#ifndef BISON_POSITION_HH
-# define BISON_POSITION_HH

 
 

-# include <iostream>
-# include <string>
-
-namespace yy
-{
-  /// Abstract a position.
-  class position
+  /* YYDEFGOTO[NTERM-NUM].  */
+  const ]b4_int_type_for([b4_defgoto])[
+  ]b4_parser_class_name[::yydefgoto_[] =

   {
   {

-  public:
-    /// Initial column number.
-    static const unsigned int initial_column = 0;
-    /// Initial line number.
-    static const unsigned int initial_line = 1;
-
-    /** \name Ctor & dtor.
-     ** \{ */
-  public:
-    /// Construct a position.
-    position () :
-      filename (0),
-      line (initial_line),
-      column (initial_column)
-    {
-    }
-    /** \} */
-
-
-    /** \name Line and Column related manipulators
-     ** \{ */
-  public:
-    /// (line related) Advance to the COUNT next lines.
-    inline void lines (int count = 1)
-    {
-      column = initial_column;
-      line += count;
-    }
-
-    /// (column related) Advance to the COUNT next columns.
-    inline void columns (int count = 1)
-    {
-      int leftmost = initial_column;
-      int current  = column;
-      if (leftmost <= current + count)
-       column += count;
-      else
-       column = initial_column;
-    }
-    /** \} */
-
-  public:
-    /// File name to which this position refers.
-    ]b4_filename_type[* filename;
-    /// Current line number.
-    unsigned int line;
-    /// Current column number.
-    unsigned int column;
+    ]b4_defgoto[

   };
 
   };
 

-  /// Add and assign a position.
-  inline const position&
-  operator+= (position& res, const int width)
+  /* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
+     positive, shift that token.  If negative, reduce the rule which
+     number is the opposite.  If YYTABLE_NINF_, syntax error.  */
+  const ]b4_int_type(b4_table_ninf, b4_table_ninf) b4_parser_class_name::yytable_ninf_ = b4_table_ninf[;
+  const ]b4_int_type_for([b4_table])[
+  ]b4_parser_class_name[::yytable_[] =

   {
   {

-    res.columns (width);
-    return res;
-  }
+    ]b4_table[
+  };

 
 

-  /// Add two position objects.
-  inline const position
-  operator+ (const position& begin, const int width)
+  /* YYCHECK.  */
+  const ]b4_int_type_for([b4_check])[
+  ]b4_parser_class_name[::yycheck_[] =

   {
   {

-    position res = begin;
-    return res += width;
-  }
+    ]b4_check[
+  };

 
 

-  /// Add and assign a position.
-  inline const position&
-  operator-= (position& res, const int width)
+  /* STOS_[STATE-NUM] -- The (internal number of the) accessing
+     symbol of state STATE-NUM.  */
+  const ]b4_int_type_for([b4_stos])[
+  ]b4_parser_class_name[::yystos_[] =

   {
   {

-    return res += -width;
-  }
+    ]b4_stos[
+  };

 
 

-  /// Add two position objects.
-  inline const position
-  operator- (const position& begin, const int width)
+#if ]b4_api_PREFIX[DEBUG
+  /* TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding
+     to YYLEX-NUM.  */
+  const ]b4_int_type_for([b4_toknum])[
+  ]b4_parser_class_name[::yytoken_number_[] =

   {
   {

-    return begin + -width;
-  }
+    ]b4_toknum[
+  };
+#endif

 
 

-  /** \brief Intercept output stream redirection.
-   ** \param ostr the destination output stream
-   ** \param pos a reference to the position to redirect
-   */
-  inline std::ostream&
-  operator<< (std::ostream& ostr, const position& pos)
+  /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
+  const ]b4_int_type_for([b4_r1])[
+  ]b4_parser_class_name[::yyr1_[] =

   {
   {

-    if (pos.filename)
-      ostr << *pos.filename << ':';
-    return ostr << pos.line << '.' << pos.column;
-  }
-
-}
-#endif // not BISON_POSITION_HH]
-@output location.hh
-b4_copyright([Location class for Bison C++ parsers], [2002, 2003, 2004, 2005])[
-
-/**
- ** \file location.hh
- ** Define the location class.
- */
-
-#ifndef BISON_LOCATION_HH
-# define BISON_LOCATION_HH
-
-# include <iostream>
-# include <string>
-# include "position.hh"
-
-namespace yy
-{
+    ]b4_r1[
+  };

 
 

-  /// Abstract a location.
-  class location
+  /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
+  const ]b4_int_type_for([b4_r2])[
+  ]b4_parser_class_name[::yyr2_[] =

   {
   {

-    /** \name Ctor & dtor.
-     ** \{ */
-  public:
-    /// Construct a location.
-    location () :
-      begin (),
-      end ()
-    {
-    }
-    /** \} */
-
-
-    /** \name Line and Column related manipulators
-     ** \{ */
-  public:
-    /// Reset initial location to final location.
-    inline void step ()
-    {
-      begin = end;
-    }
-
-    /// Extend the current location to the COUNT next columns.
-    inline void columns (unsigned int count = 1)
-    {
-      end += count;
-    }
+    ]b4_r2[
+  };

 
 

-    /// Extend the current location to the COUNT next lines.
-    inline void lines (unsigned int count = 1)
-    {
-      end.lines (count);
-    }
-    /** \} */
+]b4_token_table_if([], [[#if ]b4_api_PREFIX[DEBUG]])[
+  /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
+     First, the terminals, then, starting at \a yyntokens_, nonterminals.  */
+  const char*
+  const ]b4_parser_class_name[::yytname_[] =
+  {
+    ]b4_tname[
+  };

 
 

+]b4_token_table_if([[#if ]b4_api_PREFIX[DEBUG]])[
+  /* YYRHS -- A `-1'-separated list of the rules' RHS.  */
+  const ]b4_parser_class_name[::rhs_number_type
+  ]b4_parser_class_name[::yyrhs_[] =
+  {
+    ]b4_rhs[
+  };

 
 

-  public:
-    /// Beginning of the located region.
-    position begin;
-    /// End of the located region.
-    position end;
+  /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
+     YYRHS.  */
+  const ]b4_int_type_for([b4_prhs])[
+  ]b4_parser_class_name[::yyprhs_[] =
+  {
+    ]b4_prhs[

   };
 
   };
 

-  /// Join two location objects to create a location.
-  inline const location operator+ (const location& begin, const location& end)
+  /* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
+  const ]b4_int_type_for([b4_rline])[
+  ]b4_parser_class_name[::yyrline_[] =

   {
   {

-    location res = begin;
-    res.end = end.end;
-    return res;
-  }
+    ]b4_rline[
+  };

 
 

-  /// Add two location objects.
-  inline const location operator+ (const location& begin, unsigned int width)
+  // Print the state stack on the debug stream.
+  void
+  ]b4_parser_class_name[::yystack_print_ ()

   {
   {

-    location res = begin;
-    res.columns (width);
-    return res;
+    *yycdebug_ << "Stack now";
+    for (state_stack_type::const_iterator i = yystate_stack_.begin ();
+        i != yystate_stack_.end (); ++i)
+      *yycdebug_ << ' ' << *i;
+    *yycdebug_ << std::endl;

   }
 
   }
 

-  /// Add and assign a location.
-  inline location& operator+= (location& res, unsigned int width)
+  // Report on the debug stream that the rule \a yyrule is going to be reduced.
+  void
+  ]b4_parser_class_name[::yy_reduce_print_ (int yyrule)

   {
   {

-    res.columns (width);
-    return res;
+    unsigned int yylno = yyrline_[yyrule];
+    int yynrhs = yyr2_[yyrule];
+    /* Print the symbols being reduced, and their result.  */
+    *yycdebug_ << "Reducing stack by rule " << yyrule - 1
+              << " (line " << yylno << "):" << std::endl;
+    /* The symbols being reduced.  */
+    for (int yyi = 0; yyi < yynrhs; yyi++)
+      YY_SYMBOL_PRINT ("   $" << yyi + 1 << " =",
+                      yyrhs_[yyprhs_[yyrule] + yyi],
+                      &]b4_rhs_value(yynrhs, yyi + 1)[,
+                      &]b4_rhs_location(yynrhs, yyi + 1)[);

   }
   }

+#endif // ]b4_api_PREFIX[DEBUG

 
 

-  /** \brief Intercept output stream redirection.
-   ** \param ostr the destination output stream
-   ** \param loc a reference to the location to redirect
-   **
-   ** Avoid duplicate information.
-   */
-  inline std::ostream& operator<< (std::ostream& ostr, const location& loc)
+  /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
+  ]b4_parser_class_name[::token_number_type
+  ]b4_parser_class_name[::yytranslate_ (int t)

   {
   {

-    position last = loc.end - 1;
-    ostr << loc.begin;
-    if (last.filename
-       && (!loc.begin.filename
-           || *loc.begin.filename != *last.filename))
-      ostr << '-' << last;
-    else if (loc.begin.line != last.line)
-      ostr << '-' << last.line  << '.' << last.column;
-    else if (loc.begin.column != last.column)
-      ostr << '-' << last.column;
-    return ostr;
+    static
+    const token_number_type
+    translate_table[] =
+    {
+      ]b4_translate[
+    };
+    if ((unsigned int) t <= yyuser_token_number_max_)
+      return translate_table[t];
+    else
+      return yyundef_token_;

   }
 
   }
 

-}
+  const int ]b4_parser_class_name[::yyeof_ = 0;
+  const int ]b4_parser_class_name[::yylast_ = ]b4_last[;
+  const int ]b4_parser_class_name[::yynnts_ = ]b4_nterms_number[;
+  const int ]b4_parser_class_name[::yyempty_ = -2;
+  const int ]b4_parser_class_name[::yyfinal_ = ]b4_final_state_number[;
+  const int ]b4_parser_class_name[::yyterror_ = 1;
+  const int ]b4_parser_class_name[::yyerrcode_ = 256;
+  const int ]b4_parser_class_name[::yyntokens_ = ]b4_tokens_number[;

 
 

-#endif // not BISON_LOCATION_HH]
+  const unsigned int ]b4_parser_class_name[::yyuser_token_number_max_ = ]b4_user_token_number_max[;
+  const ]b4_parser_class_name[::token_number_type ]b4_parser_class_name[::yyundef_token_ = ]b4_undef_token_number[;
+
+]b4_namespace_close[
+]b4_epilogue
+m4_divert_pop(0)