Add sane defaults for grep, egrep, fgrep and sed.

[bison.git] / data / glr.c

diff --git a/data/glr.c b/data/glr.c
index 846adeb7a5987de2d1b2c8629c8eef6c9ce99676..9902b29f917f43534800f94d81d89dc8df00d4f5 100644 (file)
--- a/data/glr.c
+++ b/data/glr.c
@@ -1,7 +1,7 @@
-m4_divert(-1)                                                       -*- YYC -*-
+m4_divert(-1)                                                       -*- C -*-

 
 # GLR skeleton for Bison
 
 # GLR skeleton for Bison

-# Copyright (C) 2002 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003, 2004, 2005, 2006 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
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by


@@ -15,18 +15,95 @@ m4_divert(-1)                                                       -*- YYC -*-
 
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
 
 # 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., 59 Temple Place, Suite 330, Boston, MA
-# 02111-1307  USA
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301  USA

 
 

-m4_include([c.m4])

 
 

+m4_include(b4_pkgdatadir/[c.m4])
+
+## ---------------- ##
+## Default values.  ##
+## ---------------- ##
+
+# Stack parameters.
+m4_define_default([b4_stack_depth_max], [10000])
+m4_define_default([b4_stack_depth_init],  [200])
+
+
+
+## ------------------------ ##
+## Pure/impure interfaces.  ##
+## ------------------------ ##
+
+
+# b4_user_formals
+# ---------------
+# The possible parse-params formal arguments preceded by a comma.
+#
+# This is not shared with yacc.c in c.m4 because  GLR relies on ISO C
+# formal argument declarations.
+m4_define([b4_user_formals],
+[m4_ifset([b4_parse_param], [, b4_c_ansi_formals(b4_parse_param)])])
+
+
+# b4_lex_param
+# ------------
+# Accumule in b4_lex_param all the yylex arguments.
+# Yes, this is quite ugly...
+m4_define([b4_lex_param],
+m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
+b4_location_if([, [[YYLTYPE *], [&yylloc]]])])dnl
+m4_ifdef([b4_lex_param], [, ]b4_lex_param)))
+
+
+# b4_yyerror_args
+# ---------------
+# Optional effective arguments passed to yyerror: user args plus yylloc, and
+# a trailing comma.
+m4_define([b4_yyerror_args],
+[b4_pure_if([b4_location_if([yylocp, ])])dnl
+m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
+
+
+# b4_lyyerror_args
+# ----------------
+# Same as above, but on the look-ahead, hence &yylloc instead of yylocp.
+m4_define([b4_lyyerror_args],
+[b4_pure_if([b4_location_if([&yylloc, ])])dnl
+m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
+
+
+# b4_pure_args
+# ------------
+# Same as b4_yyerror_args, but with a leading comma.
+m4_define([b4_pure_args],
+[b4_pure_if([b4_location_if([, yylocp])])[]b4_user_args])
+
+
+# b4_lpure_args
+# -------------
+# Same as above, but on the look-ahead, hence &yylloc instead of yylocp.
+m4_define([b4_lpure_args],
+[b4_pure_if([b4_location_if([, &yylloc])])[]b4_user_args])
+
+
+# b4_pure_formals
+# ---------------
+# Arguments passed to yyerror: user formals plus yylocp.
+m4_define([b4_pure_formals],
+[b4_pure_if([b4_location_if([, YYLTYPE *yylocp])])[]b4_user_formals])
+
+
+## ----------------- ##
+## Semantic Values.  ##
+## ----------------- ##

 
 
 # b4_lhs_value([TYPE])
 # --------------------
 # Expansion of $<TYPE>$.
 m4_define([b4_lhs_value],
 
 
 # b4_lhs_value([TYPE])
 # --------------------
 # Expansion of $<TYPE>$.
 m4_define([b4_lhs_value],

-[(*yyvalp)[]m4_ifval([$1], [.$1])])
+[((*yyvalp)[]m4_ifval([$1], [.$1]))])

 
 
 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
 
 
 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])


@@ -34,7 +111,7 @@ m4_define([b4_lhs_value],
 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
 # symbols on RHS.
 m4_define([b4_rhs_value],
 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
 # symbols on RHS.
 m4_define([b4_rhs_value],

-[yyvsp@<:@m4_eval([$2 - $1])@:>@.yystate.yysemantics.yysval[]m4_ifval([$3], [.$3])])
+[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yysemantics.yysval[]m4_ifval([$3], [.$3]))])

 
 
 
 
 
 


@@ -42,15 +119,6 @@ m4_define([b4_rhs_value],
 ## Locations.  ##
 ## ----------- ##
 
 ## Locations.  ##
 ## ----------- ##
 

-# b4_location_if(IF-TRUE, IF-FALSE)
-# ---------------------------------
-# Expand IF-TRUE, if locations are used, IF-FALSE otherwise.
-m4_define([b4_location_if],
-[m4_if(b4_locations_flag, [1],
-       [$1],
-       [$2])])
-
-

 # b4_lhs_location()
 # -----------------
 # Expansion of @$.
 # b4_lhs_location()
 # -----------------
 # Expansion of @$.


@@ -63,72 +131,27 @@ m4_define([b4_lhs_location],
 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
 # on RHS.
 m4_define([b4_rhs_location],
 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
 # on RHS.
 m4_define([b4_rhs_location],

-[yyvsp@<:@m4_eval([$2 - $1])@:>@.yystate.yyloc])
+[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yyloc)])

 
 
 
 ## -------------- ##
 
 
 
 ## -------------- ##

-## %pure-parser.  ##
+## Output files.  ##

 ## -------------- ##
 
 ## -------------- ##
 

-# b4_pure_if(IF-TRUE, IF-FALSE)
-# -----------------------------
-# Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise.
-m4_define([b4_pure_if],
-[m4_if(b4_pure, [1],
-       [$1],
-       [$2])])
-
-
-## ------------------- ##
-## Output file names.  ##
-## ------------------- ##
-
-m4_define_default([b4_input_suffix], [.y])
-
-m4_define_default([b4_output_parser_suffix],
-[m4_translit(b4_input_suffix, [yY], [cC])])
-
-m4_define_default([b4_output_parser_name],
-[b4_output_prefix[]b4_output_infix[]b4_output_parser_suffix[]])
-
-
-m4_define_default([b4_output_header_suffix],
-[m4_translit(b4_input_suffix, [yY], [hH])])
-
-m4_define_default([b4_output_header_name],
-[b4_output_prefix[]b4_output_infix[]b4_output_header_suffix[]])
-
-m4_define_default([b4_header_guard],
-                  [m4_bpatsubst(m4_toupper([BISON_]b4_output_header_name),
-                                [[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]], [_])])
-
-
+# We do want M4 expansion after # for CPP macros.
+m4_changecom()

 m4_divert(0)dnl
 m4_divert(0)dnl

-#output "b4_output_parser_name"
-b4_copyright([Skeleton parser for GLR parsing with Bison], [2002])
+@output @output_parser_name@
+b4_copyright([Skeleton parser for GLR parsing with Bison],
+  [2002, 2003, 2004, 2005, 2006])

 [
 [

-/* This is the parser code for GLR (Generalized LR) parser. */
+/* This is the parser code for GLR (Generalized LR) parser.  */

 
 

-/* FIXME: minimize these */
-#include <stdlib.h>
-#include <setjmp.h>
-#include <stdio.h>
-#include <stdarg.h>
-#include <assert.h>
-
-/* Identify Bison output.  */
-#define YYBISON        1
+]b4_identification

 
 

-/* Pure parsers.  */
-#define YYPURE ]b4_pure[
-
-/* Using locations.  */
-#define YYLSP_NEEDED ]b4_locations_flag[
-
-]m4_if(b4_prefix[], [yy], [],
-[/* If NAME_PREFIX is specified substitute the variables and functions
-   names.  */
+m4_if(b4_prefix, [yy], [],
+[/* Substitute the variable and function names.  */

 #define yyparse b4_prefix[]parse
 #define yylex   b4_prefix[]lex
 #define yyerror b4_prefix[]error
 #define yyparse b4_prefix[]parse
 #define yylex   b4_prefix[]lex
 #define yyerror b4_prefix[]error


@@ -136,12 +159,50 @@ b4_copyright([Skeleton parser for GLR parsing with Bison], [2002])
 #define yychar  b4_prefix[]char
 #define yydebug b4_prefix[]debug
 #define yynerrs b4_prefix[]nerrs
 #define yychar  b4_prefix[]char
 #define yydebug b4_prefix[]debug
 #define yynerrs b4_prefix[]nerrs

-b4_location_if([#define yylloc b4_prefix[]lloc])])
+#define yylloc  b4_prefix[]lloc])
+
+dnl # b4_shared_declarations
+dnl # ----------------------
+dnl # Declaration that might either go into the header (if --defines)
+dnl # or open coded in the parser body.
+m4_define([b4_shared_declarations],
+[b4_token_enums(b4_tokens)[

 
 /* Copy the first part of user declarations.  */
 
 /* Copy the first part of user declarations.  */

-b4_pre_prologue
+]b4_pre_prologue[

 
 

-b4_token_defines(b4_tokens)[
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
+]m4_ifdef([b4_stype],
+[typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])
+b4_stype
+/* Line __line__ of glr.c.  */
+b4_syncline([@oline@], [@ofile@])
+       YYSTYPE;],
+[typedef int YYSTYPE;])[
+# define YYSTYPE_IS_DECLARED 1
+# define YYSTYPE_IS_TRIVIAL 1
+#endif
+
+#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
+typedef struct YYLTYPE
+{
+]b4_location_if([
+  int first_line;
+  int first_column;
+  int last_line;
+  int last_column;
+],[
+  char yydummy;
+])[
+} YYLTYPE;
+# define YYLTYPE_IS_DECLARED 1
+# define YYLTYPE_IS_TRIVIAL 1
+#endif
+]])
+
+m4_if(b4_defines_flag, 0,
+      [b4_shared_declarations],
+      [#include @output_header_name@])[

 
 /* Enabling traces.  */
 #ifndef YYDEBUG
 
 /* Enabling traces.  */
 #ifndef YYDEBUG


@@ -156,79 +217,137 @@ b4_token_defines(b4_tokens)[
 # define YYERROR_VERBOSE ]b4_error_verbose[
 #endif
 
 # define YYERROR_VERBOSE ]b4_error_verbose[
 #endif
 

-#ifndef YYSTYPE
-]m4_ifdef([b4_stype],
-[#line b4_stype_line "b4_filename"
-typedef union b4_stype yystype;
-/* Line __line__ of __file__.  */
-#line __oline__ "__ofile__"],
-[typedef int yystype;])[
-# define YYSTYPE yystype
-# define YYSTYPE_IS_TRIVIAL 1
-#endif
-
-#ifndef YYLTYPE
-typedef struct yyltype
-{
-]b4_location_if([
-  int yyfirst_line;
-  int yyfirst_column;
-  int yylast_line;
-  int yylast_column;])[
-} yyltype;
-# define YYLTYPE ]b4_ltype[
-# define YYLTYPE_IS_TRIVIAL 1
+/* Enabling the token table.  */
+#ifndef YYTOKEN_TABLE
+# define YYTOKEN_TABLE ]b4_token_table[

 #endif
 
 #endif
 

-/* Default (constant) values used for initialization for null
-   right-hand sides.  Unlike the standard bison.simple template,
-   here we set the default values of the $$ and $@ to zeroed-out
-   values.  Since the default value of these quantities is undefined,
-   this behavior is technically correct. */
+/* Default (constant) value used for initialization for null
+   right-hand sides.  Unlike the standard yacc.c template,
+   here we set the default value of $$ to a zeroed-out value.
+   Since the default value is undefined, this behavior is
+   technically correct.  */

 static YYSTYPE yyval_default;
 static YYSTYPE yyval_default;

-static YYLTYPE yyloc_default;

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

-]/* Line __line__ of __file__.  */
-#line __oline__ "__ofile__"
+]/* Line __line__ of glr.c.  */
+b4_syncline([@oline@], [@ofile@])

 [
 [

-#if ! defined (__cplusplus)
-   typedef char bool;
-#  define yytrue 1
-#  define yyfalse 0
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+#ifndef YY_
+# if YYENABLE_NLS
+#  if ENABLE_NLS
+#   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
+#   define YY_(msgid) dgettext ("bison-runtime", msgid)
+#  endif
+# endif
+# ifndef YY_
+#  define YY_(msgid) msgid
+# endif
+#endif
+
+/* Suppress unused-variable warnings by "using" E.  */
+#if ! defined lint || defined __GNUC__
+# define YYUSE(e) ((void) (e))
+#else
+# define YYUSE(e) /* empty */
+#endif
+
+/* Identity function, used to suppress warnings about constant conditions.  */
+#ifndef lint
+# define YYID(n) (n)
+#else
+]b4_c_function_def([YYID], [static int], [[int i], [i]])[
+{
+  return i;
+}
+#endif
+
+#ifndef YYFREE
+# define YYFREE free
+#endif
+#ifndef YYMALLOC
+# define YYMALLOC malloc
+#endif
+#ifndef YYREALLOC
+# define YYREALLOC realloc
+#endif
+
+#define YYSIZEMAX ((size_t) -1)
+
+#ifdef __cplusplus
+   typedef bool yybool;
+#else
+   typedef unsigned char yybool;
+#endif
+#define yytrue 1
+#define yyfalse 0
+
+#ifndef YYSETJMP
+# include <setjmp.h>
+# define YYJMP_BUF jmp_buf
+# define YYSETJMP(env) setjmp (env)
+# define YYLONGJMP(env, val) longjmp (env, val)
+#endif
+
+/*-----------------.
+| GCC extensions.  |
+`-----------------*/
+
+#ifndef __attribute__
+/* This feature is available in gcc versions 2.5 and later.  */
+# if (! defined __GNUC__ || __GNUC__ < 2 \
+      || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__)
+#  define __attribute__(Spec) /* empty */
+# endif

 #endif
 
 #endif
 

-#if ! defined (yy__GNUC__)
-#  define inline
+]b4_location_if([#define YYOPTIONAL_LOC(Name) Name],[
+#ifdef __cplusplus
+# define YYOPTIONAL_LOC(Name) /* empty */
+#else
+# define YYOPTIONAL_LOC(Name) Name __attribute__ ((__unused__))
+#endif])[
+
+#ifndef YYASSERT
+# define YYASSERT(condition) ((void) ((condition) || (abort (), 0)))

 #endif
 
 #endif
 

-/* YYFINAL -- State number of the termination state. */
-#define YYFINAL  ]b4_final[
-#define YYFLAG  ]b4_flag[
+/* YYFINAL -- State number of the termination state.  */
+#define YYFINAL  ]b4_final_state_number[
+/* YYLAST -- Last index in YYTABLE.  */

 #define YYLAST   ]b4_last[
 
 #define YYLAST   ]b4_last[
 

-/* YYNTOKENS -- Number of terminals. */
-#define YYNTOKENS  ]b4_ntokens[
-/* YYNNTS -- Number of nonterminals. */
-#define YYNNTS  ]b4_nnts[
-/* YYNRULES -- Number of rules. */
-#define YYNRULES  ]b4_nrules[
-/* YYNRULES -- Number of states. */
-#define YYNSTATES  ]b4_nstates[
-/* YYMAXRHS -- Maximum number of symbols on right-hand side of rule. */
+/* YYNTOKENS -- Number of terminals.  */
+#define YYNTOKENS  ]b4_tokens_number[
+/* YYNNTS -- Number of nonterminals.  */
+#define YYNNTS  ]b4_nterms_number[
+/* YYNRULES -- Number of rules.  */
+#define YYNRULES  ]b4_rules_number[
+/* YYNRULES -- Number of states.  */
+#define YYNSTATES  ]b4_states_number[
+/* YYMAXRHS -- Maximum number of symbols on right-hand side of rule.  */

 #define YYMAXRHS ]b4_r2_max[
 #define YYMAXRHS ]b4_r2_max[

+/* YYMAXLEFT -- Maximum number of symbols to the left of a handle
+   accessed by $0, $-1, etc., in any rule.  */
+#define YYMAXLEFT ]b4_max_left_semantic_context[

 
 /* YYTRANSLATE(X) -- Bison symbol number corresponding to X.  */
 #define YYUNDEFTOK  ]b4_undef_token_number[
 #define YYMAXUTOK   ]b4_user_token_number_max[
 
 
 /* YYTRANSLATE(X) -- Bison symbol number corresponding to X.  */
 #define YYUNDEFTOK  ]b4_undef_token_number[
 #define YYMAXUTOK   ]b4_user_token_number_max[
 

-#define YYTRANSLATE(YYX) \
-  ((unsigned)(YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
+#define YYTRANSLATE(YYX)                                               \
+  ((YYX <= 0) ? YYEOF :                                                        \
+   (unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)

 
 /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX.  */
 
 /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX.  */

-static const ]b4_uint_type(b4_translate_max)[ yytranslate[] =
+static const ]b4_int_type_for([b4_translate])[ yytranslate[] =

 {
   ]b4_translate[
 };
 {
   ]b4_translate[
 };


@@ -236,55 +355,53 @@ static const ]b4_uint_type(b4_translate_max)[ yytranslate[] =
 #if YYDEBUG
 /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
    YYRHS.  */
 #if YYDEBUG
 /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
    YYRHS.  */

-static const ]b4_uint_type(b4_prhs_max)[ yyprhs[] =
+static const ]b4_int_type_for([b4_prhs])[ yyprhs[] =

 {
   ]b4_prhs[
 };
 
 {
   ]b4_prhs[
 };
 

-/* YYRHS -- A `-1'-separated list of the rules' RHS. */
-static const ]b4_sint_type(b4_rhs_max)[ yyrhs[] =
+/* YYRHS -- A `-1'-separated list of the rules' RHS.  */
+static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =

 {
   ]b4_rhs[
 };
 
 /* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
 {
   ]b4_rhs[
 };
 
 /* YYRLINE[YYN] -- source line where rule number YYN was defined.  */

-static const ]b4_uint_type(b4_rline_max)[ yyrline[] =
+static const ]b4_int_type_for([b4_rline])[ yyrline[] =

 {
   ]b4_rline[
 };
 #endif
 
 {
   ]b4_rline[
 };
 #endif
 

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

-
-#define yytname_size (sizeof (yytname) / sizeof (yytname[0]))

 #endif
 
 /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
 #endif
 
 /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */

-static const ]b4_uint_type(b4_r1_max)[ yyr1[] =
+static const ]b4_int_type_for([b4_r1])[ yyr1[] =

 {
   ]b4_r1[
 };
 
 /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
 {
   ]b4_r1[
 };
 
 /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */

-static const ]b4_uint_type(b4_r2_max)[ yyr2[] =
+static const ]b4_int_type_for([b4_r2])[ yyr2[] =

 {
   ]b4_r2[
 };
 
 {
   ]b4_r2[
 };
 

-/* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none). */
-static const short yydprec[] =
+/* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none).  */
+static const ]b4_int_type_for([b4_dprec])[ yydprec[] =

 {
   ]b4_dprec[
 };
 
 {
   ]b4_dprec[
 };
 

-/* YYMERGER[RULE-NUM] -- Index of merging function for rule #RULE-NUM. */
-static const short yymerger[] =
+/* YYMERGER[RULE-NUM] -- Index of merging function for rule #RULE-NUM.  */
+static const ]b4_int_type_for([b4_merger])[ yymerger[] =

 {
   ]b4_merger[
 };
 {
   ]b4_merger[
 };


@@ -292,114 +409,142 @@ static const short yymerger[] =
 /* 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.  */
 /* 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.  */

-static const short yydefact[] =
+static const ]b4_int_type_for([b4_defact])[ yydefact[] =

 {
   ]b4_defact[
 };
 
 {
   ]b4_defact[
 };
 

-/* YYPGOTO[NTERM-NUM]. */
-static const short yydefgoto[] =
+/* YYPDEFGOTO[NTERM-NUM].  */
+static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =

 {
   ]b4_defgoto[
 };
 
 /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
    STATE-NUM.  */
 {
   ]b4_defgoto[
 };
 
 /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
    STATE-NUM.  */

-static const short yypact[] =
+#define YYPACT_NINF ]b4_pact_ninf[
+static const ]b4_int_type_for([b4_pact])[ yypact[] =

 {
   ]b4_pact[
 };
 
 /* YYPGOTO[NTERM-NUM].  */
 {
   ]b4_pact[
 };
 
 /* YYPGOTO[NTERM-NUM].  */

-static const short yypgoto[] =
+static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] =

 {
   ]b4_pgoto[
 };
 
 /* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
    positive, shift that token.  If negative, reduce the rule which
 {
   ]b4_pgoto[
 };
 
 /* 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.  */
-static const short yytable[] =
+   number is the opposite.  If zero, do what YYDEFACT says.
+   If YYTABLE_NINF, syntax error.  */
+#define YYTABLE_NINF ]b4_table_ninf[
+static const ]b4_int_type_for([b4_table])[ yytable[] =

 {
   ]b4_table[
 };
 
 {
   ]b4_table[
 };
 

-/* YYCONFLP[YYPACT[STATE-NUM]] -- pointer into yyconfl of start of list
-   of conflicting reductions corresponding to action entry for state
-   STATE-NUM in yytable.  0 means no conflicts.  The list in yyconfl
-   is terminated by a rule number of 0. */
-static const short yyconflp[] =
+/* YYCONFLP[YYPACT[STATE-NUM]] -- Pointer into YYCONFL of start of
+   list of conflicting reductions corresponding to action entry for
+   state STATE-NUM in yytable.  0 means no conflicts.  The list in
+   yyconfl is terminated by a rule number of 0.  */
+static const ]b4_int_type_for([b4_conflict_list_heads])[ yyconflp[] =

 {
   ]b4_conflict_list_heads[
 };
 
 {
   ]b4_conflict_list_heads[
 };
 

-/* YYCONFL[I] -- lists of conflicting rule numbers, each terminated
-   by 0, pointed into by YYCONFLP. */
-static const short yyconfl[] =
+/* YYCONFL[I] -- lists of conflicting rule numbers, each terminated by
+   0, pointed into by YYCONFLP.  */
+]dnl Do not use b4_int_type_for here, since there are places where
+dnl pointers onto yyconfl are taken, which type is "short int *".
+dnl We probably ought to introduce a type for confl.
+[static const short int yyconfl[] =

 {
   ]b4_conflicting_rules[
 };
 
 {
   ]b4_conflicting_rules[
 };
 

-static const short yycheck[] =
+static const ]b4_int_type_for([b4_check])[ yycheck[] =

 {
   ]b4_check[
 };
 
 {
   ]b4_check[
 };
 

+/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
+   symbol of state STATE-NUM.  */
+static const ]b4_int_type_for([b4_stos])[ yystos[] =
+{
+  ]b4_stos[
+};
+

 \f
 \f

-/* The user can define YYPARSE_PARAM as the name of an argument to be passed
-   into yyparse.  The argument should have type void *.
-   It should actually point to an object.
-   Grammar actions can access the variable by casting it
-   to the proper pointer type.  */
-
-#ifdef YYPARSE_PARAM
-#  define YYPARSE_PARAM_ARG void *YYPARSE_PARAM
-#else /* !YYPARSE_PARAM */
-# define YYPARSE_PARAM_ARG void
-#endif /* !YYPARSE_PARAM */
-
-/* Prevent warning if -Wstrict-prototypes.  */
-#ifdef __GNUC__
-# ifdef YYPARSE_PARAM
-int yyparse (void *);
-# else
-int yyparse (void);
-# endif
-#endif
+/* Prevent warning if -Wmissing-prototypes.  */
+]b4_c_ansi_function_decl([yyparse], [int], b4_parse_param)[

 
 /* Error token number */
 #define YYTERROR 1
 
 
 /* Error token number */
 #define YYTERROR 1
 

-/* YYLLOC_DEFAULT -- Compute the default location (before the actions
-   are run).  */
-
-#define YYRHSLOC(yyRhs,YYK) (yyRhs[YYK].yystate.yyloc)
+/* 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).  */

 
 

+]b4_location_if([[
+#define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
+#ifndef YYLLOC_DEFAULT
+# define YYLLOC_DEFAULT(Current, Rhs, N)                               \
+    do                                                                 \
+      if (YYID (N))                                                    \
+       {                                                               \
+         (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;        \
+         (Current).first_column = YYRHSLOC (Rhs, 1).first_column;      \
+         (Current).last_line    = YYRHSLOC (Rhs, N).last_line;         \
+         (Current).last_column  = YYRHSLOC (Rhs, N).last_column;       \
+       }                                                               \
+      else                                                             \
+       {                                                               \
+         (Current).first_line   = (Current).last_line   =              \
+           YYRHSLOC (Rhs, 0).last_line;                                \
+         (Current).first_column = (Current).last_column =              \
+           YYRHSLOC (Rhs, 0).last_column;                              \
+       }                                                               \
+    while (YYID (0))
+
+/* YY_LOCATION_PRINT -- Print the location on the stream.
+   This macro was not mandated originally: define only if we know
+   we won't break user code: when these are the locations we know.  */
+
+# define YY_LOCATION_PRINT(File, Loc)                  \
+    fprintf (File, "%d.%d-%d.%d",                      \
+            (Loc).first_line, (Loc).first_column,      \
+            (Loc).last_line,  (Loc).last_column)
+#endif
+]],[

 #ifndef YYLLOC_DEFAULT
 #ifndef YYLLOC_DEFAULT

-# define YYLLOC_DEFAULT(yyCurrent, yyRhs, YYN)           \
-  yyCurrent.yyfirst_line   = YYRHSLOC(yyRhs,1).yyfirst_line;      \
-  yyCurrent.yyfirst_column = YYRHSLOC(yyRhs,1).yyfirst_column;    \
-  yyCurrent.yylast_line    = YYRHSLOC(yyRhs,YYN).yylast_line;       \
-  yyCurrent.yylast_column  = YYRHSLOC(yyRhs,YYN).yylast_column;
+# define YYLLOC_DEFAULT(Current, Rhs, N) ((void) 0)

 #endif
 #endif

+])[
+
+#ifndef YY_LOCATION_PRINT
+# define YY_LOCATION_PRINT(File, Loc) ((void) 0)
+#endif
+

 
 /* YYLEX -- calling `yylex' with the right arguments.  */
 
 /* YYLEX -- calling `yylex' with the right arguments.  */

+#define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[

 
 ]b4_pure_if(
 [
 
 ]b4_pure_if(
 [

-#ifdef YYLEX_PARAM
-# define YYLEX yylex (yylvalp, b4_location_if([yyllocp, ])YYLEX_PARAM)
-#else
-# define YYLEX yylex (yylvalp[]b4_location_if([, yyllocp]))
-#endif],
-[#define YYLEX  yylex ()])
-
-b4_pure_if(
-[

 #undef yynerrs
 #undef yynerrs

-#define yynerrs (yystack->yyerrcnt)
+#define yynerrs (yystackp->yyerrcnt)

 #undef yychar
 #undef yychar

-#define yychar (yystack->yyrawchar)],
+#define yychar (yystackp->yyrawchar)
+#undef yylval
+#define yylval (yystackp->yyval)
+#undef yylloc
+#define yylloc (yystackp->yyloc)
+m4_if(b4_prefix[], [yy], [],
+[#define b4_prefix[]nerrs yynerrs
+#define b4_prefix[]char yychar
+#define b4_prefix[]lval yylval
+#define b4_prefix[]lloc yylloc])],

 [YYSTYPE yylval;
 
 YYLTYPE yylloc;
 [YYSTYPE yylval;
 
 YYLTYPE yylloc;


@@ -413,30 +558,48 @@ static const int YYEMPTY = -2;
 typedef enum { yyok, yyaccept, yyabort, yyerr } YYRESULTTAG;
 
 #define YYCHK(YYE)                                                          \
 typedef enum { yyok, yyaccept, yyabort, yyerr } YYRESULTTAG;
 
 #define YYCHK(YYE)                                                          \

-   do { YYRESULTTAG yyflag = YYE; if (yyflag != yyok) return yyflag; }              \
-   while (0)
+   do { YYRESULTTAG yyflag = YYE; if (yyflag != yyok) return yyflag; }      \
+   while (YYID (0))

 
 #if YYDEBUG
 
 
 #if YYDEBUG
 

-#if ! defined (YYFPRINTF)
+# ifndef YYFPRINTF

 #  define YYFPRINTF fprintf
 #  define YYFPRINTF fprintf

-#endif
+# endif

 
 # define YYDPRINTF(Args)                       \
 do {                                           \
   if (yydebug)                                 \
     YYFPRINTF Args;                            \
 
 # define YYDPRINTF(Args)                       \
 do {                                           \
   if (yydebug)                                 \
     YYFPRINTF Args;                            \

-} while (0)
+} while (YYID (0))
+
+]b4_yy_symbol_print_generate([b4_c_ansi_function_def])[
+
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location)                     \
+do {                                                                       \
+  if (yydebug)                                                             \
+    {                                                                      \
+      YYFPRINTF (stderr, "%s ", Title);                                            \
+      yy_symbol_print (stderr, Type,                                       \
+                      Value]b4_location_if([, Location])[]b4_user_args[);  \
+      YYFPRINTF (stderr, "\n");                                                    \
+    }                                                                      \
+} while (YYID (0))
+

 /* Nonzero means print parse trace.  It is left uninitialized so that
    multiple parsers can coexist.  */
 int yydebug;
 /* Nonzero means print parse trace.  It is left uninitialized so that
    multiple parsers can coexist.  */
 int yydebug;

+

 #else /* !YYDEBUG */
 #else /* !YYDEBUG */

+

 # define YYDPRINTF(Args)
 # define YYDPRINTF(Args)

+# define YY_SYMBOL_PRINT(Title, Type, Value, Location)
+

 #endif /* !YYDEBUG */
 
 /* YYINITDEPTH -- initial size of the parser's stacks.  */
 #ifndef        YYINITDEPTH
 #endif /* !YYDEBUG */
 
 /* YYINITDEPTH -- initial size of the parser's stacks.  */
 #ifndef        YYINITDEPTH

-# define YYINITDEPTH ]b4_initdepth[
+# define YYINITDEPTH ]b4_stack_depth_init[

 #endif
 
 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
 #endif
 
 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only


@@ -446,28 +609,114 @@ int yydebug;
    SIZE_MAX < YYMAXDEPTH * sizeof (GLRStackItem)
    evaluated with infinite-precision integer arithmetic.  */
 
    SIZE_MAX < YYMAXDEPTH * sizeof (GLRStackItem)
    evaluated with infinite-precision integer arithmetic.  */
 

-#if YYMAXDEPTH == 0
-# undef YYMAXDEPTH
-#endif
-

 #ifndef YYMAXDEPTH
 #ifndef YYMAXDEPTH

-# define YYMAXDEPTH ]b4_maxdepth[
+# define YYMAXDEPTH ]b4_stack_depth_max[

 #endif
 
 /* Minimum number of free items on the stack allowed after an
    allocation.  This is to allow allocation and initialization
 #endif
 
 /* Minimum number of free items on the stack allowed after an
    allocation.  This is to allow allocation and initialization

-   to be completed by functions that call expandGLRStack before the
+   to be completed by functions that call yyexpandGLRStack before the

    stack is expanded, thus insuring that all necessary pointers get
    stack is expanded, thus insuring that all necessary pointers get

-   properly redirected to new data. */
+   properly redirected to new data.  */

 #define YYHEADROOM 2
 
 #define YYHEADROOM 2
 

-#if ! defined (YYSTACKEXPANDABLE) \
-    && (! defined (__cplusplus) || (YYLTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL))
-#define YYSTACKEXPANDABLE 1
+#ifndef YYSTACKEXPANDABLE
+# if (! defined __cplusplus \
+      || (]b4_location_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
+         && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL))
+#  define YYSTACKEXPANDABLE 1
+# else
+#  define YYSTACKEXPANDABLE 0
+# endif
+#endif
+
+#if YYSTACKEXPANDABLE
+# define YY_RESERVE_GLRSTACK(Yystack)                  \
+  do {                                                 \
+    if (Yystack->yyspaceLeft < YYHEADROOM)             \
+      yyexpandGLRStack (Yystack);                      \
+  } while (YYID (0))

 #else
 #else

-#define YYSTACKEXPANDABLE 0
+# define YY_RESERVE_GLRSTACK(Yystack)                  \
+  do {                                                 \
+    if (Yystack->yyspaceLeft < YYHEADROOM)             \
+      yyMemoryExhausted (Yystack);                     \
+  } while (YYID (0))

 #endif
 
 #endif
 

+
+#if YYERROR_VERBOSE
+
+# ifndef yystpcpy
+#  if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
+#   define yystpcpy stpcpy
+#  else
+/* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
+   YYDEST.  */
+static char *
+yystpcpy (char *yydest, const char *yysrc)
+{
+  char *yyd = yydest;
+  const char *yys = yysrc;
+
+  while ((*yyd++ = *yys++) != '\0')
+    continue;
+
+  return yyd - 1;
+}
+#  endif
+# endif
+
+# ifndef yytnamerr
+/* Copy to YYRES the contents of 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.  If YYRES is
+   null, do not copy; instead, return the length of what the result
+   would have been.  */
+static size_t
+yytnamerr (char *yyres, const char *yystr)
+{
+  if (*yystr == '"')
+    {
+      size_t yyn = 0;
+      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:
+           if (yyres)
+             yyres[yyn] = *yyp;
+           yyn++;
+           break;
+
+         case '"':
+           if (yyres)
+             yyres[yyn] = '\0';
+           return yyn;
+         }
+    do_not_strip_quotes: ;
+    }
+
+  if (! yyres)
+    return strlen (yystr);
+
+  return yystpcpy (yyres, yystr) - yyres;
+}
+# endif
+
+#endif /* !YYERROR_VERBOSE */
+

 /** State numbers, as in LALR(1) machine */
 typedef int yyStateNum;
 
 /** State numbers, as in LALR(1) machine */
 typedef int yyStateNum;
 


@@ -475,142 +724,216 @@ typedef int yyStateNum;
 typedef int yyRuleNum;
 
 /** Grammar symbol */
 typedef int yyRuleNum;
 
 /** Grammar symbol */

-typedef short yySymbol;
+typedef short int yySymbol;

 
 /** Item references, as in LALR(1) machine */
 
 /** Item references, as in LALR(1) machine */

-typedef short yyItemNum;
+typedef short int yyItemNum;

 
 typedef struct yyGLRState yyGLRState;
 
 typedef struct yyGLRState yyGLRState;

+typedef struct yyGLRStateSet yyGLRStateSet;

 typedef struct yySemanticOption yySemanticOption;
 typedef union yyGLRStackItem yyGLRStackItem;
 typedef struct yyGLRStack yyGLRStack;
 typedef struct yySemanticOption yySemanticOption;
 typedef union yyGLRStackItem yyGLRStackItem;
 typedef struct yyGLRStack yyGLRStack;

-typedef struct yyGLRStateSet yyGLRStateSet;

 
 struct yyGLRState {
 
 struct yyGLRState {

-  bool yyisState;
-  bool yyresolved;
+  /** Type tag: always true.  */
+  yybool yyisState;
+  /** Type tag for yysemantics.  If true, yysval applies, otherwise
+   *  yyfirstVal applies.  */
+  yybool yyresolved;
+  /** Number of corresponding LALR(1) machine state.  */

   yyStateNum yylrState;
   yyStateNum yylrState;

+  /** Preceding state in this stack */

   yyGLRState* yypred;
   yyGLRState* yypred;

+  /** Source position of the first token produced by my symbol */

   size_t yyposn;
   union {
   size_t yyposn;
   union {

+    /** First in a chain of alternative reductions producing the
+     *  non-terminal corresponding to this state, threaded through
+     *  yynext.  */

     yySemanticOption* yyfirstVal;
     yySemanticOption* yyfirstVal;

+    /** Semantic value for this state.  */

     YYSTYPE yysval;
   } yysemantics;
     YYSTYPE yysval;
   } yysemantics;

+  /** Source location for this state.  */

   YYLTYPE yyloc;
 };
 
 struct yyGLRStateSet {
   yyGLRState** yystates;
   YYLTYPE yyloc;
 };
 
 struct yyGLRStateSet {
   yyGLRState** yystates;

+  /** During nondeterministic operation, yylookaheadNeeds tracks which
+   *  stacks have actually needed the current lookahead.  During deterministic
+   *  operation, yylookaheadNeeds[0] is not maintained since it would merely
+   *  duplicate yychar != YYEMPTY.  */
+  yybool* yylookaheadNeeds;

   size_t yysize, yycapacity;
 };
 
 struct yySemanticOption {
   size_t yysize, yycapacity;
 };
 
 struct yySemanticOption {

-  bool yyisState;
+  /** Type tag: always false.  */
+  yybool yyisState;
+  /** Rule number for this reduction */

   yyRuleNum yyrule;
   yyRuleNum yyrule;

+  /** The last RHS state in the list of states to be reduced.  */

   yyGLRState* yystate;
   yyGLRState* yystate;

+  /** The lookahead for this reduction.  */
+  int yyrawchar;
+  YYSTYPE yyval;
+  YYLTYPE yyloc;
+  /** Next sibling in chain of options.  To facilitate merging,
+   *  options are chained in decreasing order by address.  */

   yySemanticOption* yynext;
 };
 
   yySemanticOption* yynext;
 };
 

+/** Type of the items in the GLR stack.  The yyisState field
+ *  indicates which item of the union is valid.  */

 union yyGLRStackItem {
   yyGLRState yystate;
   yySemanticOption yyoption;
 };
 
 struct yyGLRStack {
 union yyGLRStackItem {
   yyGLRState yystate;
   yySemanticOption yyoption;
 };
 
 struct yyGLRStack {

-  int yyerrflag;

   int yyerrState;
   int yyerrState;

+]b4_location_if([[  /* To compute the location of the error token.  */
+  yyGLRStackItem yyerror_range[3];]])[

 ]b4_pure_if(
 [
   int yyerrcnt;
   int yyrawchar;
 ]b4_pure_if(
 [
   int yyerrcnt;
   int yyrawchar;

+  YYSTYPE yyval;
+  YYLTYPE yyloc;

 ])[
 ])[

-  yySymbol* yytokenp;
-  jmp_buf yyexception_buffer;
+  YYJMP_BUF yyexception_buffer;

   yyGLRStackItem* yyitems;
   yyGLRStackItem* yynextFree;
   yyGLRStackItem* yyitems;
   yyGLRStackItem* yynextFree;

-  int yyspaceLeft;
+  size_t yyspaceLeft;

   yyGLRState* yysplitPoint;
   yyGLRState* yylastDeleted;
   yyGLRStateSet yytops;
 };
 
   yyGLRState* yysplitPoint;
   yyGLRState* yylastDeleted;
   yyGLRStateSet yytops;
 };
 

-static void yyinitGLRStack (yyGLRStack* yystack, size_t yysize);
-static void yyexpandGLRStack (yyGLRStack* yystack);
-static void yyfreeGLRStack (yyGLRStack* yystack);
+#if YYSTACKEXPANDABLE
+static void yyexpandGLRStack (yyGLRStack* yystackp);
+#endif

 
 

+static void yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg)
+  __attribute__ ((__noreturn__));

 static void
 static void

-yyFail (yyGLRStack* yystack, const char* yyformat, ...)
+yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg)

 {
 {

-  if (yyformat != NULL)
-    {
-      char yymsg[256];
-      va_list yyap;
-      va_start (yyap, yyformat);
-      yystack->yyerrflag = 1;
-      vsprintf (yymsg, yyformat, yyap);
-      yyerror (yymsg);
-    }
-  longjmp (yystack->yyexception_buffer, 1);
+  if (yymsg != NULL)
+    yyerror (]b4_yyerror_args[yymsg);
+  YYLONGJMP (yystackp->yyexception_buffer, 1);
+}
+
+static void yyMemoryExhausted (yyGLRStack* yystackp)
+  __attribute__ ((__noreturn__));
+static void
+yyMemoryExhausted (yyGLRStack* yystackp)
+{
+  YYLONGJMP (yystackp->yyexception_buffer, 2);

 }
 
 #if YYDEBUG || YYERROR_VERBOSE
 }
 
 #if YYDEBUG || YYERROR_VERBOSE

-/** A printable representation of TOKEN.  Valid until next call to
- *  tokenName. */
+/** A printable representation of TOKEN.  */

 static inline const char*
 yytokenName (yySymbol yytoken)
 {
 static inline const char*
 yytokenName (yySymbol yytoken)
 {

+  if (yytoken == YYEMPTY)
+    return "";
+

   return yytname[yytoken];
 }
 #endif
 
   return yytname[yytoken];
 }
 #endif
 

-/** Perform user action for rule number YYN, with RHS length YYRHSLEN,
- *  and top stack item YYVSP.  YYLVALP points to place to put semantic
- *  value ($$), and yylocp points to place for location information
- *  (@$). Returns yyok for normal return, yyaccept for YYACCEPT,
- *  yyerr for YYERROR, yyabort for YYABORT. */
-static YYRESULTTAG
-yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
-             YYSTYPE* yyvalp, YYLTYPE* yylocp, yyGLRStack* yystack)
+/** Fill in YYVSP[YYLOW1 .. YYLOW0-1] from the chain of states starting
+ *  at YYVSP[YYLOW0].yystate.yypred.  Leaves YYVSP[YYLOW1].yystate.yypred
+ *  containing the pointer to the next state in the chain.  */
+static void yyfillin (yyGLRStackItem *, int, int) __attribute__ ((__unused__));
+static void
+yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)

 {
 {

-  if (yyrhslen == 0)
+  yyGLRState* s;
+  int i;
+  s = yyvsp[yylow0].yystate.yypred;
+  for (i = yylow0-1; i >= yylow1; i -= 1)

     {
     {

-      *yyvalp = yyval_default;
-      *yylocp = yyloc_default;
+      YYASSERT (s->yyresolved);
+      yyvsp[i].yystate.yyresolved = yytrue;
+      yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval;
+      yyvsp[i].yystate.yyloc = s->yyloc;
+      s = yyvsp[i].yystate.yypred = s->yypred;

     }
     }

-  else
+}
+
+/* Do nothing if YYNORMAL or if *YYLOW <= YYLOW1.  Otherwise, fill in
+ * YYVSP[YYLOW1 .. *YYLOW-1] as in yyfillin and set *YYLOW = YYLOW1.
+ * For convenience, always return YYLOW1.  */
+static inline int yyfill (yyGLRStackItem *, int *, int, yybool)
+     __attribute__ ((__unused__));
+static inline int
+yyfill (yyGLRStackItem *yyvsp, int *yylow, int yylow1, yybool yynormal)
+{
+  if (!yynormal && yylow1 < *yylow)

     {
     {

-      *yyvalp = yyvsp[1-yyrhslen].yystate.yysemantics.yysval;
-      *yylocp = yyvsp[1-yyrhslen].yystate.yyloc;
+      yyfillin (yyvsp, *yylow, yylow1);
+      *yylow = yylow1;

     }
     }

-# undef yyval
-# define yyval (*yyvalp)
-# undef yyerrok
-# define yyerrok (yystack->yyerrState = 0)
+  return yylow1;
+}
+
+/** Perform user action for rule number YYN, with RHS length YYRHSLEN,
+ *  and top stack item YYVSP.  YYLVALP points to place to put semantic
+ *  value ($$), and yylocp points to place for location information
+ *  (@@$).  Returns yyok for normal return, yyaccept for YYACCEPT,
+ *  yyerr for YYERROR, yyabort for YYABORT.  */
+/*ARGSUSED*/ static YYRESULTTAG
+yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
+             YYSTYPE* yyvalp,
+             YYLTYPE* YYOPTIONAL_LOC (yylocp),
+             yyGLRStack* yystackp
+             ]b4_user_formals[)
+{
+  yybool yynormal __attribute__ ((__unused__)) =
+    (yystackp->yysplitPoint == NULL);
+  int yylow;
+]b4_parse_param_use[]dnl
+[# undef yyerrok
+# define yyerrok (yystackp->yyerrState = 0)

 # undef YYACCEPT
 # define YYACCEPT return yyaccept
 # undef YYABORT
 # define YYABORT return yyabort
 # undef YYERROR
 # undef YYACCEPT
 # define YYACCEPT return yyaccept
 # undef YYABORT
 # define YYABORT return yyabort
 # undef YYERROR

-# define YYERROR return yyerr
+# define YYERROR return yyerrok, yyerr

 # undef YYRECOVERING
 # undef YYRECOVERING

-# define YYRECOVERING (yystack->yyerrState != 0)
+# define YYRECOVERING (yystackp->yyerrState != 0)

 # undef yyclearin
 # undef yyclearin

-# define yyclearin (yychar = *(yystack->yytokenp) = YYEMPTY)
+# define yyclearin (yychar = YYEMPTY)
+# undef YYFILL
+# define YYFILL(N) yyfill (yyvsp, &yylow, N, yynormal)

 # undef YYBACKUP
 # define YYBACKUP(Token, Value)                                                     \
 # undef YYBACKUP
 # define YYBACKUP(Token, Value)                                                     \

-  do {                                                                      \
-    yyerror ("syntax error: cannot back up");                               \
-    YYERROR;                                                                \
-  } while (0)
+  return yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")),     \
+        yyerrok, yyerr

 
 

-]
-   switch (yyn)
-     {
-       b4_actions
-     }
+  yylow = 1;
+  if (yyrhslen == 0)
+    *yyvalp = yyval_default;
+  else
+    *yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval;
+  YYLLOC_DEFAULT ((*yylocp), (yyvsp - yyrhslen), yyrhslen);
+]b4_location_if([[  yystackp->yyerror_range[1].yystate.yyloc = *yylocp;
+]])[
+  switch (yyn)
+    {
+      ]b4_actions
+/* Line __line__ of glr.c.  */
+b4_syncline([@oline@], [@ofile@])[
+      default: break;
+    }

 
 

-   return yyok;
-# undef yyval
+  return yyok;

 # undef yyerrok
 # undef YYABORT
 # undef YYACCEPT
 # undef yyerrok
 # undef YYABORT
 # undef YYACCEPT


@@ -618,54 +941,100 @@ yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
 # undef YYBACKUP
 # undef yyclearin
 # undef YYRECOVERING
 # undef YYBACKUP
 # undef yyclearin
 # undef YYRECOVERING

-/* Line __line__ of __file__.  */
-#line __oline__ "__ofile__"

 }
 \f
 
 }
 \f
 

-static YYSTYPE
+/*ARGSUSED*/ static void

 yyuserMerge (int yyn, YYSTYPE* yy0, YYSTYPE* yy1)
 {
 yyuserMerge (int yyn, YYSTYPE* yy0, YYSTYPE* yy1)
 {

-  YYSTYPE yyval = *yy0;
+  YYUSE (yy0);
+  YYUSE (yy1);
+

   switch (yyn)
     {
   switch (yyn)
     {

-      b4_mergers
+      ]b4_mergers[
+      default: break;

     }
     }

-  return yyval;

 }
 }

-[
-                               /* Bison grammar-table manipulation */

 
 

-/** Number of symbols composing the right hand side of rule #RULE. */
+                             /* Bison grammar-table manipulation.  */
+
+]b4_yydestruct_generate([b4_c_ansi_function_def])[
+
+/** Number of symbols composing the right hand side of rule #RULE.  */

 static inline int
 yyrhsLength (yyRuleNum yyrule)
 {
   return yyr2[yyrule];
 }
 
 static inline int
 yyrhsLength (yyRuleNum yyrule)
 {
   return yyr2[yyrule];
 }
 

-/** Left-hand-side symbol for rule #RULE. */
+static void
+yydestroyGLRState (char const *yymsg, yyGLRState *yys]b4_user_formals[)
+{
+  if (yys->yyresolved)
+    yydestruct (yymsg, yystos[yys->yylrState],
+               &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[]b4_user_args[);
+  else
+    {
+#if YYDEBUG
+      if (yydebug)
+       {
+         if (yys->yysemantics.yyfirstVal)
+           YYFPRINTF (stderr, "%s unresolved ", yymsg);
+         else
+           YYFPRINTF (stderr, "%s incomplete ", yymsg);
+         yy_symbol_print (stderr, yystos[yys->yylrState],
+                          NULL]b4_location_if([, &yys->yyloc])[]b4_user_args[);
+         YYFPRINTF (stderr, "\n");
+       }
+#endif
+
+      if (yys->yysemantics.yyfirstVal)
+       {
+         yySemanticOption *yyoption = yys->yysemantics.yyfirstVal;
+         yyGLRState *yyrh;
+         int yyn;
+         for (yyrh = yyoption->yystate, yyn = yyrhsLength (yyoption->yyrule);
+              yyn > 0;
+              yyrh = yyrh->yypred, yyn -= 1)
+           yydestroyGLRState (yymsg, yyrh]b4_user_args[);
+       }
+    }
+}
+
+/** Left-hand-side symbol for rule #RULE.  */

 static inline yySymbol
 yylhsNonterm (yyRuleNum yyrule)
 {
   return yyr1[yyrule];
 }
 
 static inline yySymbol
 yylhsNonterm (yyRuleNum yyrule)
 {
   return yyr1[yyrule];
 }
 

+#define yyis_pact_ninf(yystate) \
+  ]m4_if(m4_eval(b4_pact_ninf < b4_pact_min), [1],
+        [0],
+        [((yystate) == YYPACT_NINF)])[
+

 /** True iff LR state STATE has only a default reduction (regardless
 /** True iff LR state STATE has only a default reduction (regardless

- *  of token). */
-static inline bool
+ *  of token).  */
+static inline yybool

 yyisDefaultedState (yyStateNum yystate)
 {
 yyisDefaultedState (yyStateNum yystate)
 {

-  return yypact[yystate] == YYFLAG;
+  return yyis_pact_ninf (yypact[yystate]);

 }
 
 }
 

-/** The default reduction for STATE, assuming it has one. */
+/** The default reduction for STATE, assuming it has one.  */

 static inline yyRuleNum
 yydefaultAction (yyStateNum yystate)
 {
   return yydefact[yystate];
 }
 
 static inline yyRuleNum
 yydefaultAction (yyStateNum yystate)
 {
   return yydefact[yystate];
 }
 

-/** Set *ACTION to the action to take in STATE on seeing TOKEN.
+#define yyis_table_ninf(yytable_value) \
+  ]m4_if(m4_eval(b4_table_ninf < b4_table_min), [1],
+        [YYID (0)],
+        [((yytable_value) == YYTABLE_NINF)])[
+
+/** Set *YYACTION to the action to take in YYSTATE on seeing YYTOKEN.

  *  Result R means
  *    R < 0:  Reduce on rule -R.
  *    R = 0:  Error.
  *  Result R means
  *    R < 0:  Reduce on rule -R.
  *    R = 0:  Error.


@@ -675,19 +1044,24 @@ yydefaultAction (yyStateNum yystate)
  */
 static inline void
 yygetLRActions (yyStateNum yystate, int yytoken,
  */
 static inline void
 yygetLRActions (yyStateNum yystate, int yytoken,

-               int* yyaction, const short** yyconflicts)
+               int* yyaction, const short int** yyconflicts)

 {
   int yyindex = yypact[yystate] + yytoken;
 {
   int yyindex = yypact[yystate] + yytoken;

-  if (yyindex < 0 || yyindex > YYLAST || yycheck[yyindex] != yytoken)
+  if (yyindex < 0 || YYLAST < yyindex || yycheck[yyindex] != yytoken)

     {
       *yyaction = -yydefact[yystate];
       *yyconflicts = yyconfl;
     }
     {
       *yyaction = -yydefact[yystate];
       *yyconflicts = yyconfl;
     }

-  else
+  else if (! yyis_table_ninf (yytable[yyindex]))

     {
       *yyaction = yytable[yyindex];
       *yyconflicts = yyconfl + yyconflp[yyindex];
     }
     {
       *yyaction = yytable[yyindex];
       *yyconflicts = yyconfl + yyconflp[yyindex];
     }

+  else
+    {
+      *yyaction = 0;
+      *yyconflicts = yyconfl + yyconflp[yyindex];
+    }

 }
 
 static inline yyStateNum
 }
 
 static inline yyStateNum


@@ -695,112 +1069,144 @@ yyLRgotoState (yyStateNum yystate, yySymbol yylhs)
 {
   int yyr;
   yyr = yypgoto[yylhs - YYNTOKENS] + yystate;
 {
   int yyr;
   yyr = yypgoto[yylhs - YYNTOKENS] + yystate;

-  if (yyr >= 0 && yyr <= YYLAST && yycheck[yyr] == yystate)
+  if (0 <= yyr && yyr <= YYLAST && yycheck[yyr] == yystate)

     return yytable[yyr];
   else
     return yydefgoto[yylhs - YYNTOKENS];
 }
 
     return yytable[yyr];
   else
     return yydefgoto[yylhs - YYNTOKENS];
 }
 

-static inline bool
+static inline yybool

 yyisShiftAction (int yyaction)
 {
 yyisShiftAction (int yyaction)
 {

-  return yyaction > 0;
+  return 0 < yyaction;

 }
 
 }
 

-static inline bool
+static inline yybool

 yyisErrorAction (int yyaction)
 {
 yyisErrorAction (int yyaction)
 {

-  return yyaction == 0 || yyaction == YYFLAG;
+  return yyaction == 0;

 }
 
                                /* GLRStates */
 
 }
 
                                /* GLRStates */
 

-/** True iff the semantic value of the edge leading to STATE is
- *  resolved. */
-static inline bool
-yyhasResolvedValue (yyGLRState* yystate)
+/** Return a fresh GLRStackItem.  Callers should call
+ * YY_RESERVE_GLRSTACK afterwards to make sure there is sufficient
+ * headroom.  */
+
+static inline yyGLRStackItem*
+yynewGLRStackItem (yyGLRStack* yystackp, yybool yyisState)

 {
 {

-  return yystate->yyresolved;
+  yyGLRStackItem* yynewItem = yystackp->yynextFree;
+  yystackp->yyspaceLeft -= 1;
+  yystackp->yynextFree += 1;
+  yynewItem->yystate.yyisState = yyisState;
+  return yynewItem;

 }
 
 }
 

-void yyaddDeferredAction (yyGLRStack* yystack, yyGLRState* yystate,
-                         yyGLRState* yyrhs, yyRuleNum yyrule)
-{
-  yySemanticOption* yynewItem;
-  yynewItem = &yystack->yynextFree->yyoption;
-  yystack->yyspaceLeft -= 1;
-  yystack->yynextFree += 1;
-  yynewItem->yyisState = yyfalse;
-  yynewItem->yystate = yyrhs;
-  yynewItem->yyrule = yyrule;
-  yynewItem->yynext = yystate->yysemantics.yyfirstVal;
-  yystate->yysemantics.yyfirstVal = yynewItem;
-  if (yystack->yyspaceLeft < YYHEADROOM)
-    yyexpandGLRStack (yystack);
+/** Add a new semantic action that will execute the action for rule
+ *  RULENUM on the semantic values in RHS to the list of
+ *  alternative actions for STATE.  Assumes that RHS comes from
+ *  stack #K of *STACKP. */
+static void
+yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate,
+                    yyGLRState* rhs, yyRuleNum yyrule)
+{
+  yySemanticOption* yynewOption =
+    &yynewGLRStackItem (yystackp, yyfalse)->yyoption;
+  yynewOption->yystate = rhs;
+  yynewOption->yyrule = yyrule;
+  if (yystackp->yytops.yylookaheadNeeds[yyk])
+    {
+      yynewOption->yyrawchar = yychar;
+      yynewOption->yyval = yylval;
+      yynewOption->yyloc = yylloc;
+    }
+  else
+    yynewOption->yyrawchar = YYEMPTY;
+  yynewOption->yynext = yystate->yysemantics.yyfirstVal;
+  yystate->yysemantics.yyfirstVal = yynewOption;
+
+  YY_RESERVE_GLRSTACK (yystackp);

 }
 
                                /* GLRStacks */
 
 }
 
                                /* GLRStacks */
 

-/** Initialize SET to a singleton set containing an empty stack. */
-static void
+/** Initialize SET to a singleton set containing an empty stack.  */
+static yybool

 yyinitStateSet (yyGLRStateSet* yyset)
 {
   yyset->yysize = 1;
   yyset->yycapacity = 16;
 yyinitStateSet (yyGLRStateSet* yyset)
 {
   yyset->yysize = 1;
   yyset->yycapacity = 16;

-  yyset->yystates = (yyGLRState**) malloc (16 * sizeof (yyset->yystates[0]));
+  yyset->yystates = (yyGLRState**) YYMALLOC (16 * sizeof yyset->yystates[0]);
+  if (! yyset->yystates)
+    return yyfalse;

   yyset->yystates[0] = NULL;
   yyset->yystates[0] = NULL;

+  yyset->yylookaheadNeeds =
+    (yybool*) YYMALLOC (16 * sizeof yyset->yylookaheadNeeds[0]);
+  if (! yyset->yylookaheadNeeds)
+    {
+      YYFREE (yyset->yystates);
+      return yyfalse;
+    }
+  return yytrue;

 }
 
 static void yyfreeStateSet (yyGLRStateSet* yyset)
 {
 }
 
 static void yyfreeStateSet (yyGLRStateSet* yyset)
 {

-  free (yyset->yystates);
+  YYFREE (yyset->yystates);
+  YYFREE (yyset->yylookaheadNeeds);

 }
 
 /** Initialize STACK to a single empty stack, with total maximum
 }
 
 /** Initialize STACK to a single empty stack, with total maximum

- *  capacity for all stacks of SIZE. */
-static void
-yyinitGLRStack (yyGLRStack* yystack, size_t yysize)
+ *  capacity for all stacks of SIZE.  */
+static yybool
+yyinitGLRStack (yyGLRStack* yystackp, size_t yysize)

 {
 {

-  yystack->yyerrflag = 0;
-  yystack->yyerrState = 0;
+  yystackp->yyerrState = 0;

   yynerrs = 0;
   yynerrs = 0;

-  yystack->yyspaceLeft = yysize;
-  yystack->yynextFree = yystack->yyitems =
-    (yyGLRStackItem*) malloc (yysize * sizeof (yystack->yynextFree[0]));
-  yystack->yysplitPoint = NULL;
-  yystack->yylastDeleted = NULL;
-  yyinitStateSet (&yystack->yytops);
+  yystackp->yyspaceLeft = yysize;
+  yystackp->yyitems =
+    (yyGLRStackItem*) YYMALLOC (yysize * sizeof yystackp->yynextFree[0]);
+  if (!yystackp->yyitems)
+    return yyfalse;
+  yystackp->yynextFree = yystackp->yyitems;
+  yystackp->yysplitPoint = NULL;
+  yystackp->yylastDeleted = NULL;
+  return yyinitStateSet (&yystackp->yytops);

 }
 
 }
 

-#define YYRELOC(YYFROMITEMS,YYTOITEMS,YYX,YYTYPE) \
+
+#if YYSTACKEXPANDABLE
+# define YYRELOC(YYFROMITEMS,YYTOITEMS,YYX,YYTYPE) \

   &((YYTOITEMS) - ((YYFROMITEMS) - (yyGLRStackItem*) (YYX)))->YYTYPE
 
 /** If STACK is expandable, extend it.  WARNING: Pointers into the
     stack from outside should be considered invalid after this call.
     We always expand when there are 1 or fewer items left AFTER an
     allocation, so that we can avoid having external pointers exist
   &((YYTOITEMS) - ((YYFROMITEMS) - (yyGLRStackItem*) (YYX)))->YYTYPE
 
 /** If STACK is expandable, extend it.  WARNING: Pointers into the
     stack from outside should be considered invalid after this call.
     We always expand when there are 1 or fewer items left AFTER an
     allocation, so that we can avoid having external pointers exist

-    across an allocation. */
+    across an allocation.  */

 static void
 static void

-yyexpandGLRStack (yyGLRStack* yystack)
+yyexpandGLRStack (yyGLRStack* yystackp)

 {
 {

-#if YYSTACKEXPANDABLE
-  yyGLRStack yynewStack;
+  yyGLRStackItem* yynewItems;

   yyGLRStackItem* yyp0, *yyp1;
   size_t yysize, yynewSize;
   size_t yyn;
   yyGLRStackItem* yyp0, *yyp1;
   size_t yysize, yynewSize;
   size_t yyn;

-  yysize = yystack->yynextFree - yystack->yyitems;
-  if (yysize >= YYMAXDEPTH)
-    yyFail (yystack, "parsing stack overflow (%d items)", yysize);
+  yysize = yystackp->yynextFree - yystackp->yyitems;
+  if (YYMAXDEPTH - YYHEADROOM < yysize)
+    yyMemoryExhausted (yystackp);

   yynewSize = 2*yysize;
   yynewSize = 2*yysize;

-  if (yynewSize > YYMAXDEPTH)
+  if (YYMAXDEPTH < yynewSize)

     yynewSize = YYMAXDEPTH;
     yynewSize = YYMAXDEPTH;

-  yyinitGLRStack (&yynewStack, yynewSize);
-  for (yyp0 = yystack->yyitems, yyp1 = yynewStack.yyitems, yyn = yysize;
-       yyn > 0;
+  yynewItems = (yyGLRStackItem*) YYMALLOC (yynewSize * sizeof yynewItems[0]);
+  if (! yynewItems)
+    yyMemoryExhausted (yystackp);
+  for (yyp0 = yystackp->yyitems, yyp1 = yynewItems, yyn = yysize;
+       0 < yyn;

        yyn -= 1, yyp0 += 1, yyp1 += 1)
     {
       *yyp1 = *yyp0;
        yyn -= 1, yyp0 += 1, yyp1 += 1)
     {
       *yyp1 = *yyp0;

-      if (*(bool*) yyp0)
+      if (*(yybool *) yyp0)

        {
          yyGLRState* yys0 = &yyp0->yystate;
          yyGLRState* yys1 = &yyp1->yystate;
        {
          yyGLRState* yys0 = &yyp0->yystate;
          yyGLRState* yys1 = &yyp1->yystate;


@@ -821,85 +1227,92 @@ yyexpandGLRStack (yyGLRStack* yystack)
            yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption);
        }
     }
            yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption);
        }
     }

-  if (yystack->yysplitPoint != NULL)
-    yystack->yysplitPoint = YYRELOC (yystack->yyitems, yynewStack.yyitems,
-                                yystack->yysplitPoint, yystate);
-
-  for (yyn = 0; yyn < yystack->yytops.yysize; yyn += 1)
-    if (yystack->yytops.yystates[yyn] != NULL)
-      yystack->yytops.yystates[yyn] =
-       YYRELOC (yystack->yyitems, yynewStack.yyitems,
-                yystack->yytops.yystates[yyn], yystate);
-  free (yystack->yyitems);
-  yystack->yyitems = yynewStack.yyitems;
-  yystack->yynextFree = yynewStack.yynextFree + yysize;
-  yystack->yyspaceLeft = yynewStack.yyspaceLeft - yysize;
-
-#else
-
-  yyFail (yystack, "parsing stack overflow (%d items)", yysize);
-
-#endif
+  if (yystackp->yysplitPoint != NULL)
+    yystackp->yysplitPoint = YYRELOC (yystackp->yyitems, yynewItems,
+                                yystackp->yysplitPoint, yystate);
+
+  for (yyn = 0; yyn < yystackp->yytops.yysize; yyn += 1)
+    if (yystackp->yytops.yystates[yyn] != NULL)
+      yystackp->yytops.yystates[yyn] =
+       YYRELOC (yystackp->yyitems, yynewItems,
+                yystackp->yytops.yystates[yyn], yystate);
+  YYFREE (yystackp->yyitems);
+  yystackp->yyitems = yynewItems;
+  yystackp->yynextFree = yynewItems + yysize;
+  yystackp->yyspaceLeft = yynewSize - yysize;

 }
 }

+#endif

 
 static void
 
 static void

-yyfreeGLRStack (yyGLRStack* yystack)
+yyfreeGLRStack (yyGLRStack* yystackp)

 {
 {

-  free (yystack->yyitems);
-  yyfreeStateSet (&yystack->yytops);
+  YYFREE (yystackp->yyitems);
+  yyfreeStateSet (&yystackp->yytops);

 }
 
 /** Assuming that S is a GLRState somewhere on STACK, update the
  *  splitpoint of STACK, if needed, so that it is at least as deep as
 }
 
 /** Assuming that S is a GLRState somewhere on STACK, update the
  *  splitpoint of STACK, if needed, so that it is at least as deep as

- *  S. */
+ *  S.  */

 static inline void
 static inline void

-yyupdateSplit (yyGLRStack* yystack, yyGLRState* yys)
+yyupdateSplit (yyGLRStack* yystackp, yyGLRState* yys)

 {
 {

-  if (yystack->yysplitPoint != NULL && yystack->yysplitPoint > yys)
-    yystack->yysplitPoint = yys;
+  if (yystackp->yysplitPoint != NULL && yystackp->yysplitPoint > yys)
+    yystackp->yysplitPoint = yys;

 }
 
 }
 

-/** Invalidate stack #K in STACK. */
+/** Invalidate stack #K in STACK.  */

 static inline void
 static inline void

-yymarkStackDeleted (yyGLRStack* yystack, int yyk)
+yymarkStackDeleted (yyGLRStack* yystackp, size_t yyk)

 {
 {

-  if (yystack->yytops.yystates[yyk] != NULL)
-    yystack->yylastDeleted = yystack->yytops.yystates[yyk];
-  yystack->yytops.yystates[yyk] = NULL;
+  if (yystackp->yytops.yystates[yyk] != NULL)
+    yystackp->yylastDeleted = yystackp->yytops.yystates[yyk];
+  yystackp->yytops.yystates[yyk] = NULL;

 }
 
 /** Undelete the last stack that was marked as deleted.  Can only be
     done once after a deletion, and only when all other stacks have
 }
 
 /** Undelete the last stack that was marked as deleted.  Can only be
     done once after a deletion, and only when all other stacks have

-    been deleted. */
+    been deleted.  */

 static void
 static void

-yyundeleteLastStack (yyGLRStack* yystack)
+yyundeleteLastStack (yyGLRStack* yystackp)

 {
 {

-  if (yystack->yylastDeleted == NULL || yystack->yytops.yysize != 0)
+  if (yystackp->yylastDeleted == NULL || yystackp->yytops.yysize != 0)

     return;
     return;

-  yystack->yytops.yystates[0] = yystack->yylastDeleted;
-  yystack->yytops.yysize = 1;
+  yystackp->yytops.yystates[0] = yystackp->yylastDeleted;
+  yystackp->yytops.yysize = 1;

   YYDPRINTF ((stderr, "Restoring last deleted stack as stack #0.\n"));
   YYDPRINTF ((stderr, "Restoring last deleted stack as stack #0.\n"));

-  yystack->yylastDeleted = NULL;
+  yystackp->yylastDeleted = NULL;

 }
 
 static inline void
 }
 
 static inline void

-yyremoveDeletes (yyGLRStack* yystack)
+yyremoveDeletes (yyGLRStack* yystackp)

 {
 {

-  int yyi, yyj;
+  size_t yyi, yyj;

   yyi = yyj = 0;
   yyi = yyj = 0;

-  while (yyj < yystack->yytops.yysize)
+  while (yyj < yystackp->yytops.yysize)

     {
     {

-      if (yystack->yytops.yystates[yyi] == NULL)
+      if (yystackp->yytops.yystates[yyi] == NULL)

        {
        {

-         if (YYDEBUG && yyi == yyj)
-           YYDPRINTF ((stderr, "Removing dead stacks.\n"));
-         yystack->yytops.yysize -= 1;
+         if (yyi == yyj)
+           {
+             YYDPRINTF ((stderr, "Removing dead stacks.\n"));
+           }
+         yystackp->yytops.yysize -= 1;

        }
       else
        {
        }
       else
        {

-         yystack->yytops.yystates[yyj] = yystack->yytops.yystates[yyi];
+         yystackp->yytops.yystates[yyj] = yystackp->yytops.yystates[yyi];
+         /* In the current implementation, it's unnecessary to copy
+            yystackp->yytops.yylookaheadNeeds[yyi] since, after
+            yyremoveDeletes returns, the parser immediately either enters
+            deterministic operation or shifts a token.  However, it doesn't
+            hurt, and the code might evolve to need it.  */
+         yystackp->yytops.yylookaheadNeeds[yyj] =
+           yystackp->yytops.yylookaheadNeeds[yyi];

          if (yyj != yyi)
          if (yyj != yyi)

-           YYDPRINTF ((stderr, "Rename stack %d -> %d.\n", yyi, yyj));
+           {
+             YYDPRINTF ((stderr, "Rename stack %lu -> %lu.\n",
+                         (unsigned long int) yyi, (unsigned long int) yyj));
+           }

          yyj += 1;
        }
       yyi += 1;
          yyj += 1;
        }
       yyi += 1;


@@ -907,111 +1320,135 @@ yyremoveDeletes (yyGLRStack* yystack)
 }
 
 /** Shift to a new state on stack #K of STACK, corresponding to LR state
 }
 
 /** Shift to a new state on stack #K of STACK, corresponding to LR state

- * LRSTATE, at input position POSN, with (resolved) semantic value SVAL. */
+ * LRSTATE, at input position POSN, with (resolved) semantic value SVAL.  */

 static inline void
 static inline void

-yyglrShift (yyGLRStack* yystack, int yyk, yyStateNum yylrState, size_t yyposn,
-           YYSTYPE yysval, YYLTYPE* yylocp)
-{
-  yyGLRStackItem* yynewItem;
-
-  yynewItem = yystack->yynextFree;
-  yystack->yynextFree += 1;
-  yystack->yyspaceLeft -= 1;
-  yynewItem->yystate.yyisState = yytrue;
-  yynewItem->yystate.yylrState = yylrState;
-  yynewItem->yystate.yyposn = yyposn;
-  yynewItem->yystate.yyresolved = yytrue;
-  yynewItem->yystate.yypred = yystack->yytops.yystates[yyk];
-  yystack->yytops.yystates[yyk] = &yynewItem->yystate;
-  yynewItem->yystate.yysemantics.yysval = yysval;
-  yynewItem->yystate.yyloc = *yylocp;
-  if (yystack->yyspaceLeft < YYHEADROOM)
-    yyexpandGLRStack (yystack);
+yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
+           size_t yyposn,
+           YYSTYPE* yyvalp, YYLTYPE* yylocp)
+{
+  yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate;
+
+  yynewState->yylrState = yylrState;
+  yynewState->yyposn = yyposn;
+  yynewState->yyresolved = yytrue;
+  yynewState->yypred = yystackp->yytops.yystates[yyk];
+  yynewState->yysemantics.yysval = *yyvalp;
+  yynewState->yyloc = *yylocp;
+  yystackp->yytops.yystates[yyk] = yynewState;
+
+  YY_RESERVE_GLRSTACK (yystackp);

 }
 
 }
 

-/** Shift to a new state on stack #K of STACK, to a new state
- *  corresponding to LR state LRSTATE, at input position POSN, with
- * the (unresolved) semantic value of RHS under the action for RULE. */
+/** Shift stack #K of YYSTACK, to a new state corresponding to LR
+ *  state YYLRSTATE, at input position YYPOSN, with the (unresolved)
+ *  semantic value of YYRHS under the action for YYRULE.  */

 static inline void
 static inline void

-yyglrShiftDefer (yyGLRStack* yystack, int yyk, yyStateNum yylrState,
-                size_t yyposn, yyGLRState* yyrhs, yyRuleNum yyrule)
-{
-  yyGLRStackItem* yynewItem;
-
-  yynewItem = yystack->yynextFree;
-  yynewItem->yystate.yyisState = yytrue;
-  yynewItem->yystate.yylrState = yylrState;
-  yynewItem->yystate.yyposn = yyposn;
-  yynewItem->yystate.yyresolved = yyfalse;
-  yynewItem->yystate.yypred = yystack->yytops.yystates[yyk];
-  yynewItem->yystate.yysemantics.yyfirstVal = NULL;
-  yystack->yytops.yystates[yyk] = &yynewItem->yystate;
-  yystack->yynextFree += 1;
-  yystack->yyspaceLeft -= 1;
-  yyaddDeferredAction (yystack, &yynewItem->yystate, yyrhs, yyrule);
+yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
+                size_t yyposn, yyGLRState* rhs, yyRuleNum yyrule)
+{
+  yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate;
+
+  yynewState->yylrState = yylrState;
+  yynewState->yyposn = yyposn;
+  yynewState->yyresolved = yyfalse;
+  yynewState->yypred = yystackp->yytops.yystates[yyk];
+  yynewState->yysemantics.yyfirstVal = NULL;
+  yystackp->yytops.yystates[yyk] = yynewState;
+
+  /* Invokes YY_RESERVE_GLRSTACK.  */
+  yyaddDeferredAction (yystackp, yyk, yynewState, rhs, yyrule);

 }
 
 /** Pop the symbols consumed by reduction #RULE from the top of stack
  *  #K of STACK, and perform the appropriate semantic action on their
  *  semantic values.  Assumes that all ambiguities in semantic values
 }
 
 /** Pop the symbols consumed by reduction #RULE from the top of stack
  *  #K of STACK, and perform the appropriate semantic action on their
  *  semantic values.  Assumes that all ambiguities in semantic values

- *  have been previously resolved. Set *VALP to the resulting value,
+ *  have been previously resolved.  Set *VALP to the resulting value,

  *  and *LOCP to the computed location (if any).  Return value is as
  *  and *LOCP to the computed location (if any).  Return value is as

- *  for userAction. */
-static inline int
-yydoAction (yyGLRStack* yystack, int yyk, yyRuleNum yyrule,
-           YYSTYPE* yyvalp, YYLTYPE* yylocp)
+ *  for userAction.  */
+static inline YYRESULTTAG
+yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
+           YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)

 {
   int yynrhs = yyrhsLength (yyrule);
 
 {
   int yynrhs = yyrhsLength (yyrule);
 

-  if (yystack->yysplitPoint == NULL)
+  if (yystackp->yysplitPoint == NULL)

     {
     {

-      /* Standard special case: single stack. */
-      yyGLRStackItem* yyrhs = (yyGLRStackItem*) yystack->yytops.yystates[yyk];
-      assert (yyk == 0);
-      yystack->yynextFree -= yynrhs;
-      yystack->yyspaceLeft += yynrhs;
-      yystack->yytops.yystates[0] = & yystack->yynextFree[-1].yystate;
-      if (yynrhs == 0)
-       {
-         *yyvalp = yyval_default;
-         *yylocp = yyloc_default;
-       }
-      else
-       {
-         *yyvalp = yyrhs[1-yynrhs].yystate.yysemantics.yysval;
-         *yylocp = yyrhs[1-yynrhs].yystate.yyloc;
-       }
-      return yyuserAction (yyrule, yynrhs, yyrhs, yyvalp, yylocp, yystack);
+      /* Standard special case: single stack.  */
+      yyGLRStackItem* rhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];
+      YYASSERT (yyk == 0);
+      yystackp->yynextFree -= yynrhs;
+      yystackp->yyspaceLeft += yynrhs;
+      yystackp->yytops.yystates[0] = & yystackp->yynextFree[-1].yystate;
+      return yyuserAction (yyrule, yynrhs, rhs,
+                          yyvalp, yylocp, yystackp]b4_user_args[);

     }
   else
     {
     }
   else
     {

+      /* At present, doAction is never called in nondeterministic
+       * mode, so this branch is never taken.  It is here in
+       * anticipation of a future feature that will allow immediate
+       * evaluation of selected actions in nondeterministic mode.  */

       int yyi;
       yyGLRState* yys;
       int yyi;
       yyGLRState* yys;

-      yyGLRStackItem yyrhsVals[YYMAXRHS];
-      for (yyi = yynrhs-1, yys = yystack->yytops.yystates[yyk]; yyi >= 0;
-          yyi -= 1, yys = yys->yypred)
-       {
-         assert (yys->yypred != NULL);
-         yyrhsVals[yyi].yystate.yyresolved = yytrue;
-         yyrhsVals[yyi].yystate.yysemantics.yysval = yys->yysemantics.yysval;
-         yyrhsVals[yyi].yystate.yyloc = yys->yyloc;
-       }
-      yyupdateSplit (yystack, yys);
-      yystack->yytops.yystates[yyk] = yys;
+      yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
+      yys = yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred
+       = yystackp->yytops.yystates[yyk];]b4_location_if([[

       if (yynrhs == 0)
       if (yynrhs == 0)

+       /* Set default location.  */
+       yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yys->yyloc;]])[
+      for (yyi = 0; yyi < yynrhs; yyi += 1)

        {
        {

-         *yyvalp = yyval_default;
-         *yylocp = yyloc_default;
-       }
-      else
-       {
-         *yyvalp = yyrhsVals[0].yystate.yysemantics.yysval;
-         *yylocp = yyrhsVals[0].yystate.yyloc;
+         yys = yys->yypred;
+         YYASSERT (yys);

        }
        }

-      return yyuserAction (yyrule, yynrhs, yyrhsVals + (yynrhs-1),
-                          yyvalp, yylocp, yystack);
+      yyupdateSplit (yystackp, yys);
+      yystackp->yytops.yystates[yyk] = yys;
+      return yyuserAction (yyrule, yynrhs, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
+                          yyvalp, yylocp, yystackp]b4_user_args[);
+    }
+}
+
+#if !YYDEBUG
+# define YY_REDUCE_PRINT(Args)
+#else
+# define YY_REDUCE_PRINT(Args)         \
+do {                                   \
+  if (yydebug)                         \
+    yy_reduce_print Args;              \
+} while (YYID (0))
+
+/*----------------------------------------------------------.
+| Report that the RULE is going to be reduced on stack #K.  |
+`----------------------------------------------------------*/
+
+/*ARGSUSED*/ static inline void
+yy_reduce_print (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
+                YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
+{
+  int yynrhs = yyrhsLength (yyrule);
+  yybool yynormal __attribute__ ((__unused__)) =
+    (yystackp->yysplitPoint == NULL);
+  yyGLRStackItem* yyvsp = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];
+  int yylow = 1;
+  int yyi;
+  YYUSE (yyvalp);
+  YYUSE (yylocp);
+]b4_parse_param_use[]dnl
+[  YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu):\n",
+            (unsigned long int) yyk, yyrule - 1,
+            (unsigned long int) yyrline[yyrule]);
+  /* The symbols being reduced.  */
+  for (yyi = 0; yyi < yynrhs; yyi++)
+    {
+      fprintf (stderr, "   $%d = ", yyi + 1);
+      yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
+                      &]b4_rhs_value(yynrhs, yyi + 1)[
+                      ]b4_location_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
+                      b4_user_args[);
+      fprintf (stderr, "\n");

     }
 }
     }
 }

+#endif

 
 /** Pop items off stack #K of STACK according to grammar rule RULE,
  *  and push back on the resulting nonterminal symbol.  Perform the
 
 /** Pop items off stack #K of STACK according to grammar rule RULE,
  *  and push back on the resulting nonterminal symbol.  Perform the


@@ -1021,95 +1458,120 @@ yydoAction (yyGLRStack* yystack, int yyk, yyRuleNum yyrule,
  *  the new state.  If the new state would have an identical input
  *  position, LR state, and predecessor to an existing state on the stack,
  *  it is identified with that existing state, eliminating stack #K from
  *  the new state.  If the new state would have an identical input
  *  position, LR state, and predecessor to an existing state on the stack,
  *  it is identified with that existing state, eliminating stack #K from

- *  the STACK. In this case, the (necessarily deferred) semantic value is
+ *  the STACK.  In this case, the (necessarily deferred) semantic value is

  *  added to the options for the existing state's semantic value.
  */
 static inline YYRESULTTAG
  *  added to the options for the existing state's semantic value.
  */
 static inline YYRESULTTAG

-yyglrReduce (yyGLRStack* yystack, int yyk, yyRuleNum yyrule, bool yyforceEval)
+yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
+            yybool yyforceEval]b4_user_formals[)

 {
 {

-  int yyposn = yystack->yytops.yystates[yyk]->yyposn;
+  size_t yyposn = yystackp->yytops.yystates[yyk]->yyposn;

 
 

-  if (yyforceEval || yystack->yysplitPoint == NULL)
+  if (yyforceEval || yystackp->yysplitPoint == NULL)

     {
       YYSTYPE yysval;
       YYLTYPE yyloc;
 
     {
       YYSTYPE yysval;
       YYLTYPE yyloc;
 

-      YYCHK (yydoAction (yystack, yyk, yyrule, &yysval, &yyloc));
-      yyglrShift (yystack, yyk,
-                 yyLRgotoState (yystack->yytops.yystates[yyk]->yylrState,
+      YY_REDUCE_PRINT ((yystackp, yyk, yyrule, &yysval, &yyloc]b4_user_args[));
+      YYCHK (yydoAction (yystackp, yyk, yyrule, &yysval,
+                        &yyloc]b4_user_args[));
+      YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyrule], &yysval, &yyloc);
+      yyglrShift (yystackp, yyk,
+                 yyLRgotoState (yystackp->yytops.yystates[yyk]->yylrState,

                                 yylhsNonterm (yyrule)),
                                 yylhsNonterm (yyrule)),

-               yyposn, yysval, &yyloc);
-      YYDPRINTF ((stderr, "Reduced stack %d by rule #%d. Now in state %d.\n",
-                 yyk, yyrule-1, yystack->yytops.yystates[yyk]->yylrState));
+                 yyposn, &yysval, &yyloc);

     }
   else
     {
     }
   else
     {

-      int yyi, yyn;
-      yyGLRState* yys, *yys0 = yystack->yytops.yystates[yyk];
+      size_t yyi;
+      int yyn;
+      yyGLRState* yys, *yys0 = yystackp->yytops.yystates[yyk];

       yyStateNum yynewLRState;
 
       yyStateNum yynewLRState;
 

-      for (yys = yystack->yytops.yystates[yyk], yyn = yyrhsLength (yyrule);
-          yyn > 0; yyn -= 1)
+      for (yys = yystackp->yytops.yystates[yyk], yyn = yyrhsLength (yyrule);
+          0 < yyn; yyn -= 1)

        {
          yys = yys->yypred;
        {
          yys = yys->yypred;

-         assert (yys != NULL);
+         YYASSERT (yys);

        }
        }

-      yyupdateSplit (yystack, yys);
+      yyupdateSplit (yystackp, yys);

       yynewLRState = yyLRgotoState (yys->yylrState, yylhsNonterm (yyrule));
       YYDPRINTF ((stderr,
       yynewLRState = yyLRgotoState (yys->yylrState, yylhsNonterm (yyrule));
       YYDPRINTF ((stderr,

-                 "Reduced stack %d by rule #%d; action deferred. "
-                 "Now in state %d.\n",
-                 yyk, yyrule-1, yynewLRState));
-      for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1)
-       if (yyi != yyk && yystack->yytops.yystates[yyi] != NULL)
+                 "Reduced stack %lu by rule #%d; action deferred.  Now in state %d.\n",
+                 (unsigned long int) yyk, yyrule - 1, yynewLRState));
+      for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)
+       if (yyi != yyk && yystackp->yytops.yystates[yyi] != NULL)

          {
          {

-           yyGLRState* yyp, *yysplit = yystack->yysplitPoint;
-           yyp = yystack->yytops.yystates[yyi];
+           yyGLRState* yyp, *yysplit = yystackp->yysplitPoint;
+           yyp = yystackp->yytops.yystates[yyi];

            while (yyp != yys && yyp != yysplit && yyp->yyposn >= yyposn)
              {
                if (yyp->yylrState == yynewLRState && yyp->yypred == yys)
                  {
            while (yyp != yys && yyp != yysplit && yyp->yyposn >= yyposn)
              {
                if (yyp->yylrState == yynewLRState && yyp->yypred == yys)
                  {

-                   yyaddDeferredAction (yystack, yyp, yys0, yyrule);
-                   yymarkStackDeleted (yystack, yyk);
-                   YYDPRINTF ((stderr, "Merging stack %d into stack %d.\n",
-                               yyk, yyi));
-                   return 0;
+                   yyaddDeferredAction (yystackp, yyk, yyp, yys0, yyrule);
+                   yymarkStackDeleted (yystackp, yyk);
+                   YYDPRINTF ((stderr, "Merging stack %lu into stack %lu.\n",
+                               (unsigned long int) yyk,
+                               (unsigned long int) yyi));
+                   return yyok;

                  }
                yyp = yyp->yypred;
              }
          }
                  }
                yyp = yyp->yypred;
              }
          }

-      yystack->yytops.yystates[yyk] = yys;
-      yyglrShiftDefer (yystack, yyk, yynewLRState, yyposn, yys0, yyrule);
+      yystackp->yytops.yystates[yyk] = yys;
+      yyglrShiftDefer (yystackp, yyk, yynewLRState, yyposn, yys0, yyrule);

     }
     }

-  return 0;
+  return yyok;

 }
 
 }
 

-static int
-yysplitStack (yyGLRStack* yystack, int yyk)
+static size_t
+yysplitStack (yyGLRStack* yystackp, size_t yyk)

 {
 {

-  if (yystack->yysplitPoint == NULL)
+  if (yystackp->yysplitPoint == NULL)

     {
     {

-      assert (yyk == 0);
-      yystack->yysplitPoint = yystack->yytops.yystates[yyk];
+      YYASSERT (yyk == 0);
+      yystackp->yysplitPoint = yystackp->yytops.yystates[yyk];

     }
     }

-  if (yystack->yytops.yysize >= yystack->yytops.yycapacity)
+  if (yystackp->yytops.yysize >= yystackp->yytops.yycapacity)

     {
     {

-      yystack->yytops.yycapacity *= 2;
-      yystack->yytops.yystates =
-       (yyGLRState**) realloc (yystack->yytops.yystates,
-                               yystack->yytops.yycapacity
-                               * sizeof (yyGLRState*));
+      yyGLRState** yynewStates;
+      yybool* yynewLookaheadNeeds;
+
+      yynewStates = NULL;
+
+      if (yystackp->yytops.yycapacity
+         > (YYSIZEMAX / (2 * sizeof yynewStates[0])))
+       yyMemoryExhausted (yystackp);
+      yystackp->yytops.yycapacity *= 2;
+
+      yynewStates =
+       (yyGLRState**) YYREALLOC (yystackp->yytops.yystates,
+                                 (yystackp->yytops.yycapacity
+                                  * sizeof yynewStates[0]));
+      if (yynewStates == NULL)
+       yyMemoryExhausted (yystackp);
+      yystackp->yytops.yystates = yynewStates;
+
+      yynewLookaheadNeeds =
+       (yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds,
+                            (yystackp->yytops.yycapacity
+                             * sizeof yynewLookaheadNeeds[0]));
+      if (yynewLookaheadNeeds == NULL)
+       yyMemoryExhausted (yystackp);
+      yystackp->yytops.yylookaheadNeeds = yynewLookaheadNeeds;

     }
     }

-  yystack->yytops.yystates[yystack->yytops.yysize]
-    = yystack->yytops.yystates[yyk];
-  yystack->yytops.yysize += 1;
-  return yystack->yytops.yysize-1;
+  yystackp->yytops.yystates[yystackp->yytops.yysize]
+    = yystackp->yytops.yystates[yyk];
+  yystackp->yytops.yylookaheadNeeds[yystackp->yytops.yysize]
+    = yystackp->yytops.yylookaheadNeeds[yyk];
+  yystackp->yytops.yysize += 1;
+  return yystackp->yytops.yysize-1;

 }
 
 /** True iff Y0 and Y1 represent identical options at the top level.
  *  That is, they represent the same rule applied to RHS symbols
 }
 
 /** True iff Y0 and Y1 represent identical options at the top level.
  *  That is, they represent the same rule applied to RHS symbols

- *  that produce the same terminal symbols. */
-static bool
+ *  that produce the same terminal symbols.  */
+static yybool

 yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
 {
   if (yyy0->yyrule == yyy1->yyrule)
 yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
 {
   if (yyy0->yyrule == yyy1->yyrule)


@@ -1128,9 +1590,8 @@ yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
     return yyfalse;
 }
 
     return yyfalse;
 }
 

-/** Assuming identicalOptions (Y0,Y1), (destructively) merge the
- *  alternative semantic values for the RHS-symbols of Y1 into the
- *  corresponding semantic value sets of the symbols of Y0. */
+/** Assuming identicalOptions (Y0,Y1), destructively merge the
+ *  alternative semantic values for the RHS-symbols of Y1 and Y0.  */

 static void
 yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
 {
 static void
 yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
 {


@@ -1140,116 +1601,169 @@ yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
        yyn = yyrhsLength (yyy0->yyrule);
        yyn > 0;
        yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)
        yyn = yyrhsLength (yyy0->yyrule);
        yyn > 0;
        yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)

-    if (yys0 == yys1)
-      break;
-    else if (! yys0->yyresolved && ! yys1->yyresolved)
-      {
-       yySemanticOption* yyz;
-       for (yyz = yys0->yysemantics.yyfirstVal; yyz->yynext != NULL;
-            yyz = yyz->yynext)
-         ;
-       yyz->yynext = yys1->yysemantics.yyfirstVal;
-      }
+    {
+      if (yys0 == yys1)
+       break;
+      else if (yys0->yyresolved)
+       {
+         yys1->yyresolved = yytrue;
+         yys1->yysemantics.yysval = yys0->yysemantics.yysval;
+       }
+      else if (yys1->yyresolved)
+       {
+         yys0->yyresolved = yytrue;
+         yys0->yysemantics.yysval = yys1->yysemantics.yysval;
+       }
+      else
+       {
+         yySemanticOption** yyz0p;
+         yySemanticOption* yyz1;
+         yyz0p = &yys0->yysemantics.yyfirstVal;
+         yyz1 = yys1->yysemantics.yyfirstVal;
+         while (YYID (yytrue))
+           {
+             if (yyz1 == *yyz0p || yyz1 == NULL)
+               break;
+             else if (*yyz0p == NULL)
+               {
+                 *yyz0p = yyz1;
+                 break;
+               }
+             else if (*yyz0p < yyz1)
+               {
+                 yySemanticOption* yyz = *yyz0p;
+                 *yyz0p = yyz1;
+                 yyz1 = yyz1->yynext;
+                 (*yyz0p)->yynext = yyz;
+               }
+             yyz0p = &(*yyz0p)->yynext;
+           }
+         yys1->yysemantics.yyfirstVal = yys0->yysemantics.yyfirstVal;
+       }
+    }

 }
 
 /** Y0 and Y1 represent two possible actions to take in a given
  *  parsing state; return 0 if no combination is possible,
 }
 
 /** Y0 and Y1 represent two possible actions to take in a given
  *  parsing state; return 0 if no combination is possible,

- *  1 if user-mergeable, 2 if Y0 is preferred, 3 if Y1 is preferred. */
+ *  1 if user-mergeable, 2 if Y0 is preferred, 3 if Y1 is preferred.  */

 static int
 static int

-yypreference (yySemanticOption* yyy0, yySemanticOption* yyy1)
+yypreference (yySemanticOption* y0, yySemanticOption* y1)

 {
 {

-  yyRuleNum yyr0 = yyy0->yyrule, yyr1 = yyy1->yyrule;
-  int yyp0 = yydprec[yyr0], yyp1 = yydprec[yyr1];
+  yyRuleNum r0 = y0->yyrule, r1 = y1->yyrule;
+  int p0 = yydprec[r0], p1 = yydprec[r1];

 
 

-  if (yyp0 == yyp1)
+  if (p0 == p1)

     {
     {

-      if (yymerger[yyr0] == 0 || yymerger[yyr0] != yymerger[yyr1])
+      if (yymerger[r0] == 0 || yymerger[r0] != yymerger[r1])

        return 0;
       else
        return 1;
     }
        return 0;
       else
        return 1;
     }

-  if (yyp0 == 0 || yyp1 == 0)
+  if (p0 == 0 || p1 == 0)

     return 0;
     return 0;

-  if (yyp0 < yyp1)
+  if (p0 < p1)

     return 3;
     return 3;

-  if (yyp0 > yyp1)
+  if (p1 < p0)

     return 2;
   return 0;
 }
 
     return 2;
   return 0;
 }
 

-static YYRESULTTAG yyresolveValue (yySemanticOption* yyoptionList,
-                                  yyGLRStack* yystack, YYSTYPE* yyvalp,
-                                  YYLTYPE* yylocp);
+static YYRESULTTAG yyresolveValue (yyGLRState* yys,
+                                  yyGLRStack* yystackp]b4_user_formals[);

 
 

+
+/** Resolve the previous N states starting at and including state S.  If result
+ *  != yyok, some states may have been left unresolved possibly with empty
+ *  semantic option chains.  Regardless of whether result = yyok, each state
+ *  has been left with consistent data so that yydestroyGLRState can be invoked
+ *  if necessary.  */

 static YYRESULTTAG
 static YYRESULTTAG

-yyresolveStates (yyGLRState* yys, int yyn, yyGLRStack* yystack)
+yyresolveStates (yyGLRState* yys, int yyn,
+                yyGLRStack* yystackp]b4_user_formals[)

 {
 {

-  YYRESULTTAG yyflag;
-  if (yyn > 0)
+  if (0 < yyn)

     {
     {

-      assert (yys->yypred != NULL);
-      yyflag = yyresolveStates (yys->yypred, yyn-1, yystack);
-      if (yyflag != yyok)
-       return yyflag;
+      YYASSERT (yys->yypred);
+      YYCHK (yyresolveStates (yys->yypred, yyn-1, yystackp]b4_user_args[));

       if (! yys->yyresolved)
       if (! yys->yyresolved)

-       {
-         yyflag = yyresolveValue (yys->yysemantics.yyfirstVal, yystack,
-                              &yys->yysemantics.yysval, &yys->yyloc);
-         if (yyflag != yyok)
-           return yyflag;
-         yys->yyresolved = yytrue;
-       }
+       YYCHK (yyresolveValue (yys, yystackp]b4_user_args[));

     }
   return yyok;
 }
 
     }
   return yyok;
 }
 

+/** Resolve the states for the RHS of OPT, perform its user action, and return
+ *  the semantic value and location.  Regardless of whether result = yyok, all
+ *  RHS states have been destroyed (assuming the user action destroys all RHS
+ *  semantic values if invoked).  */

 static YYRESULTTAG
 static YYRESULTTAG

-yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystack,
-                YYSTYPE* yyvalp, YYLTYPE* yylocp)
-{
-  yyGLRStackItem yyrhsVals[YYMAXRHS];
-  int yynrhs, yyi;
-  yyGLRState* yys;
+yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystackp,
+                YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
+{
+  yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
+  int yynrhs;
+  int yychar_current;
+  YYSTYPE yylval_current;
+  YYLTYPE yylloc_current;
+  YYRESULTTAG yyflag;

 
   yynrhs = yyrhsLength (yyopt->yyrule);
 
   yynrhs = yyrhsLength (yyopt->yyrule);

-  YYCHK (yyresolveStates (yyopt->yystate, yynrhs, yystack));
-  for (yyi = yynrhs-1, yys = yyopt->yystate; yyi >= 0;
-       yyi -= 1, yys = yys->yypred)
+  yyflag = yyresolveStates (yyopt->yystate, yynrhs, yystackp]b4_user_args[);
+  if (yyflag != yyok)

     {
     {

-      assert (yys->yypred != NULL);
-      yyrhsVals[yyi].yystate.yyresolved = yytrue;
-      yyrhsVals[yyi].yystate.yysemantics.yysval = yys->yysemantics.yysval;
-      yyrhsVals[yyi].yystate.yyloc = yys->yyloc;
+      yyGLRState *yys;
+      for (yys = yyopt->yystate; yynrhs > 0; yys = yys->yypred, yynrhs -= 1)
+       yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
+      return yyflag;

     }
     }

-  return yyuserAction (yyopt->yyrule, yynrhs, yyrhsVals + (yynrhs-1),
-                      yyvalp, yylocp, yystack);
+
+  yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred = yyopt->yystate;]b4_location_if([[
+  if (yynrhs == 0)
+    /* Set default location.  */
+    yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yyopt->yystate->yyloc;]])[
+  yychar_current = yychar;
+  yylval_current = yylval;
+  yylloc_current = yylloc;
+  yychar = yyopt->yyrawchar;
+  yylval = yyopt->yyval;
+  yylloc = yyopt->yyloc;
+  yyflag = yyuserAction (yyopt->yyrule, yynrhs,
+                          yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
+                          yyvalp, yylocp, yystackp]b4_user_args[);
+  yychar = yychar_current;
+  yylval = yylval_current;
+  yylloc = yylloc_current;
+  return yyflag;

 }
 
 #if YYDEBUG
 }
 
 #if YYDEBUG

-static yyGLRState YYLEFTMOST_STATE = { 0, NULL, -1, 0, { NULL } };
-
-static void yyreportTree (yySemanticOption* yyx, int yyindent)
+static void
+yyreportTree (yySemanticOption* yyx, int yyindent)

 {
   int yynrhs = yyrhsLength (yyx->yyrule);
   int yyi;
   yyGLRState* yys;
   yyGLRState* yystates[YYMAXRHS];
 {
   int yynrhs = yyrhsLength (yyx->yyrule);
   int yyi;
   yyGLRState* yys;
   yyGLRState* yystates[YYMAXRHS];

+  yyGLRState yyleftmost_state;

 
 

-  for (yyi = yynrhs, yys = yyx->yystate; yyi > 0; yyi -= 1, yys = yys->yypred)
+  for (yyi = yynrhs, yys = yyx->yystate; 0 < yyi; yyi -= 1, yys = yys->yypred)

     yystates[yyi] = yys;
   if (yys == NULL)
     yystates[yyi] = yys;
   if (yys == NULL)

-    yystates[0] = &YYLEFTMOST_STATE;
+    {
+      yyleftmost_state.yyposn = 0;
+      yystates[0] = &yyleftmost_state;
+    }

   else
     yystates[0] = yys;
 
   else
     yystates[0] = yys;
 

-  if (yys->yyposn+1 > yyx->yystate->yyposn)
+  if (yyx->yystate->yyposn < yys->yyposn + 1)

     YYFPRINTF (stderr, "%*s%s -> <Rule %d, empty>\n",
               yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
               yyx->yyrule);
   else
     YYFPRINTF (stderr, "%*s%s -> <Rule %d, empty>\n",
               yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
               yyx->yyrule);
   else

-    YYFPRINTF (stderr, "%*s%s -> <Rule %d, tokens %d .. %d>\n",
+    YYFPRINTF (stderr, "%*s%s -> <Rule %d, tokens %lu .. %lu>\n",

               yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
               yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),

-              yyx->yyrule, yys->yyposn+1, yyx->yystate->yyposn);
+              yyx->yyrule, (unsigned long int) (yys->yyposn + 1),
+              (unsigned long int) yyx->yystate->yyposn);

   for (yyi = 1; yyi <= yynrhs; yyi += 1)
     {
       if (yystates[yyi]->yyresolved)
   for (yyi = 1; yyi <= yynrhs; yyi += 1)
     {
       if (yystates[yyi]->yyresolved)


@@ -1258,9 +1772,10 @@ static void yyreportTree (yySemanticOption* yyx, int yyindent)
            YYFPRINTF (stderr, "%*s%s <empty>\n", yyindent+2, "",
                       yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]));
          else
            YYFPRINTF (stderr, "%*s%s <empty>\n", yyindent+2, "",
                       yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]));
          else

-           YYFPRINTF (stderr, "%*s%s <tokens %d .. %d>\n", yyindent+2, "",
+           YYFPRINTF (stderr, "%*s%s <tokens %lu .. %lu>\n", yyindent+2, "",

                       yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]),
                       yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]),

-                      yystates[yyi-1]->yyposn+1, yystates[yyi]->yyposn);
+                      (unsigned long int) (yystates[yyi - 1]->yyposn + 1),
+                      (unsigned long int) yystates[yyi]->yyposn);

        }
       else
        yyreportTree (yystates[yyi]->yysemantics.yyfirstVal, yyindent+2);
        }
       else
        yyreportTree (yystates[yyi]->yysemantics.yyfirstVal, yyindent+2);


@@ -1268,10 +1783,13 @@ static void yyreportTree (yySemanticOption* yyx, int yyindent)
 }
 #endif
 
 }
 #endif
 

-static void
-yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1,
-                  yyGLRStack* yystack)
+/*ARGSUSED*/ static YYRESULTTAG
+yyreportAmbiguity (yySemanticOption* yyx0,
+                  yySemanticOption* yyx1]b4_pure_formals[)

 {
 {

+  YYUSE (yyx0);
+  YYUSE (yyx1);
+

 #if YYDEBUG
   YYFPRINTF (stderr, "Ambiguity detected.\n");
   YYFPRINTF (stderr, "Option 1,\n");
 #if YYDEBUG
   YYFPRINTF (stderr, "Ambiguity detected.\n");
   YYFPRINTF (stderr, "Option 1,\n");


@@ -1280,428 +1798,664 @@ yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1,
   yyreportTree (yyx1, 2);
   YYFPRINTF (stderr, "\n");
 #endif
   yyreportTree (yyx1, 2);
   YYFPRINTF (stderr, "\n");
 #endif

-  yyFail (yystack, "ambiguity detected");
+
+  yyerror (]b4_yyerror_args[YY_("syntax is ambiguous"));
+  return yyabort;

 }
 
 }
 

+/** Starting at and including state S1, resolve the location for each of the
+ *  previous N1 states that is unresolved.  The first semantic option of a state
+ *  is always chosen.  */
+static void
+yyresolveLocations (yyGLRState* yys1, int yyn1,
+                   yyGLRStack *yystackp]b4_user_formals[)
+{
+  if (0 < yyn1)
+    {
+      yyresolveLocations (yys1->yypred, yyn1 - 1, yystackp]b4_user_args[);
+      if (!yys1->yyresolved)
+       {
+         yySemanticOption *yyoption;
+         yyGLRStackItem yyrhsloc[1 + YYMAXRHS];
+         int yynrhs;
+         int yychar_current;
+         YYSTYPE yylval_current;
+         YYLTYPE yylloc_current;
+         yyoption = yys1->yysemantics.yyfirstVal;
+         YYASSERT (yyoption != NULL);
+         yynrhs = yyrhsLength (yyoption->yyrule);
+         if (yynrhs > 0)
+           {
+             yyGLRState *yys;
+             int yyn;
+             yyresolveLocations (yyoption->yystate, yynrhs,
+                                 yystackp]b4_user_args[);
+             for (yys = yyoption->yystate, yyn = yynrhs;
+                  yyn > 0;
+                  yys = yys->yypred, yyn -= 1)
+               yyrhsloc[yyn].yystate.yyloc = yys->yyloc;
+           }
+         else
+           {
+             yyGLRState *yyprevious = yyoption->yystate;
+             YYASSERT (yyprevious->yyresolved);
+             yyrhsloc[0].yystate.yyloc = yyprevious->yyloc;
+           }
+         yychar_current = yychar;
+         yylval_current = yylval;
+         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;
+       }
+    }
+}

 
 

-/** Resolve the ambiguity represented by OPTIONLIST, perform the indicated
- *  actions, and return the result. */
+/** Resolve the ambiguity represented in state S, perform the indicated
+ *  actions, and set the semantic value of S.  If result != yyok, the chain of
+ *  semantic options in S has been cleared instead or it has been left
+ *  unmodified except that redundant options may have been removed.  Regardless
+ *  of whether result = yyok, S has been left with consistent data so that
+ *  yydestroyGLRState can be invoked if necessary.  */

 static YYRESULTTAG
 static YYRESULTTAG

-yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystack,
-               YYSTYPE* yyvalp, YYLTYPE* yylocp)
+yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)

 {
 {

+  yySemanticOption* yyoptionList = yys->yysemantics.yyfirstVal;

   yySemanticOption* yybest;
   yySemanticOption* yybest;

-  yySemanticOption* yyp;
-  int yymerge;
+  yySemanticOption** yypp;
+  yybool yymerge;
+  YYSTYPE yysval;
+  YYRESULTTAG yyflag;
+  YYLTYPE *yylocp = &yys->yyloc;

 
   yybest = yyoptionList;
 
   yybest = yyoptionList;

-  yymerge = 0;
-  for (yyp = yyoptionList->yynext; yyp != NULL; yyp = yyp->yynext)
+  yymerge = yyfalse;
+  for (yypp = &yyoptionList->yynext; *yypp != NULL; )

     {
     {

+      yySemanticOption* yyp = *yypp;
+

       if (yyidenticalOptions (yybest, yyp))
       if (yyidenticalOptions (yybest, yyp))

-       yymergeOptionSets (yybest, yyp);
+       {
+         yymergeOptionSets (yybest, yyp);
+         *yypp = yyp->yynext;
+       }

       else
       else

-       switch (yypreference (yybest, yyp))
-         {
-         case 0:
-           yyreportAmbiguity (yybest, yyp, yystack);
-           break;
-         case 1:
-           yymerge = 1;
-           break;
-         case 2:
-           break;
-         case 3:
-           yybest = yyp;
-           yymerge = 0;
-           break;
-         }
+       {
+         switch (yypreference (yybest, yyp))
+           {
+           case 0:
+             yyresolveLocations (yys, 1, yystackp]b4_user_args[);
+             return yyreportAmbiguity (yybest, yyp]b4_pure_args[);
+             break;
+           case 1:
+             yymerge = yytrue;
+             break;
+           case 2:
+             break;
+           case 3:
+             yybest = yyp;
+             yymerge = yyfalse;
+             break;
+           default:
+             /* This cannot happen so it is not worth a YYASSERT (yyfalse),
+                but some compilers complain if the default case is
+                omitted.  */
+             break;
+           }
+         yypp = &yyp->yynext;
+       }

     }
 
   if (yymerge)
     {
     }
 
   if (yymerge)
     {

+      yySemanticOption* yyp;

       int yyprec = yydprec[yybest->yyrule];
       int yyprec = yydprec[yybest->yyrule];

-      YYCHK (yyresolveAction (yybest, yystack, yyvalp, yylocp));
-      for (yyp = yybest->yynext; yyp != NULL; yyp = yyp->yynext)
-       {
-         if (yyprec == yydprec[yyp->yyrule])
-           {
-             YYSTYPE yyval1;
-             YYLTYPE yydummy;
-             YYCHK (yyresolveAction (yyp, yystack, &yyval1, &yydummy));
-             *yyvalp = yyuserMerge (yymerger[yyp->yyrule], yyvalp, &yyval1);
-           }
-       }
-      return yyok;
+      yyflag = yyresolveAction (yybest, yystackp, &yysval,
+                               yylocp]b4_user_args[);
+      if (yyflag == yyok)
+       for (yyp = yybest->yynext; yyp != NULL; yyp = yyp->yynext)
+         {
+           if (yyprec == yydprec[yyp->yyrule])
+             {
+               YYSTYPE yysval_other;
+               YYLTYPE yydummy;
+               yyflag = yyresolveAction (yyp, yystackp, &yysval_other,
+                                         &yydummy]b4_user_args[);
+               if (yyflag != yyok)
+                 {
+                   yydestruct ("Cleanup: discarding incompletely merged value for",
+                               yystos[yys->yylrState],
+                               &yysval]b4_location_if([, yylocp])[]b4_user_args[);
+                   break;
+                 }
+               yyuserMerge (yymerger[yyp->yyrule], &yysval, &yysval_other);
+             }
+         }
+    }
+  else
+    yyflag = yyresolveAction (yybest, yystackp, &yysval, yylocp]b4_user_args[);
+
+  if (yyflag == yyok)
+    {
+      yys->yyresolved = yytrue;
+      yys->yysemantics.yysval = yysval;

     }
   else
     }
   else

-    return yyresolveAction (yybest, yystack, yyvalp, yylocp);
+    yys->yysemantics.yyfirstVal = NULL;
+  return yyflag;

 }
 
 static YYRESULTTAG
 }
 
 static YYRESULTTAG

-yyresolveStack (yyGLRStack* yystack)
+yyresolveStack (yyGLRStack* yystackp]b4_user_formals[)

 {
 {

-  if (yystack->yysplitPoint != NULL)
+  if (yystackp->yysplitPoint != NULL)

     {
       yyGLRState* yys;
       int yyn;
 
     {
       yyGLRState* yys;
       int yyn;
 

-      for (yyn = 0, yys = yystack->yytops.yystates[0];
-          yys != yystack->yysplitPoint;
+      for (yyn = 0, yys = yystackp->yytops.yystates[0];
+          yys != yystackp->yysplitPoint;

           yys = yys->yypred, yyn += 1)
           yys = yys->yypred, yyn += 1)

-       ;
-      YYCHK (yyresolveStates (yystack->yytops.yystates[0], yyn, yystack));
+       continue;
+      YYCHK (yyresolveStates (yystackp->yytops.yystates[0], yyn, yystackp
+                            ]b4_user_args[));

     }
   return yyok;
 }
 
 static void
     }
   return yyok;
 }
 
 static void

-yycompressStack (yyGLRStack* yystack)
+yycompressStack (yyGLRStack* yystackp)

 {
   yyGLRState* yyp, *yyq, *yyr;
 
 {
   yyGLRState* yyp, *yyq, *yyr;
 

-  if (yystack->yytops.yysize != 1 || yystack->yysplitPoint == NULL)
+  if (yystackp->yytops.yysize != 1 || yystackp->yysplitPoint == NULL)

     return;
 
     return;
 

-  for (yyp = yystack->yytops.yystates[0], yyq = yyp->yypred, yyr = NULL;
-       yyp != yystack->yysplitPoint;
+  for (yyp = yystackp->yytops.yystates[0], yyq = yyp->yypred, yyr = NULL;
+       yyp != yystackp->yysplitPoint;

        yyr = yyp, yyp = yyq, yyq = yyp->yypred)
     yyp->yypred = yyr;
 
        yyr = yyp, yyp = yyq, yyq = yyp->yypred)
     yyp->yypred = yyr;
 

-  yystack->yyspaceLeft += yystack->yynextFree - yystack->yyitems;
-  yystack->yynextFree = ((yyGLRStackItem*) yystack->yysplitPoint) + 1;
-  yystack->yyspaceLeft -= yystack->yynextFree - yystack->yyitems;
-  yystack->yysplitPoint = NULL;
-  yystack->yylastDeleted = NULL;
+  yystackp->yyspaceLeft += yystackp->yynextFree - yystackp->yyitems;
+  yystackp->yynextFree = ((yyGLRStackItem*) yystackp->yysplitPoint) + 1;
+  yystackp->yyspaceLeft -= yystackp->yynextFree - yystackp->yyitems;
+  yystackp->yysplitPoint = NULL;
+  yystackp->yylastDeleted = NULL;

 
   while (yyr != NULL)
     {
 
   while (yyr != NULL)
     {

-      yystack->yynextFree->yystate = *yyr;
+      yystackp->yynextFree->yystate = *yyr;

       yyr = yyr->yypred;
       yyr = yyr->yypred;

-      yystack->yynextFree->yystate.yypred = & yystack->yynextFree[-1].yystate;
-      yystack->yytops.yystates[0] = &yystack->yynextFree->yystate;
-      yystack->yynextFree += 1;
-      yystack->yyspaceLeft -= 1;
+      yystackp->yynextFree->yystate.yypred = &yystackp->yynextFree[-1].yystate;
+      yystackp->yytops.yystates[0] = &yystackp->yynextFree->yystate;
+      yystackp->yynextFree += 1;
+      yystackp->yyspaceLeft -= 1;

     }
 }
 
 static YYRESULTTAG
     }
 }
 
 static YYRESULTTAG

-yyprocessOneStack (yyGLRStack* yystack, int yyk,
-                  size_t yyposn, YYSTYPE* yylvalp, YYLTYPE* yyllocp)
+yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
+                  size_t yyposn]b4_pure_formals[)

 {
   int yyaction;
 {
   int yyaction;

-  const short* yyconflicts;
+  const short int* yyconflicts;

   yyRuleNum yyrule;
   yyRuleNum yyrule;

-  yySymbol* const yytokenp = yystack->yytokenp;

 
 

-  while (yystack->yytops.yystates[yyk] != NULL)
+  while (yystackp->yytops.yystates[yyk] != NULL)

     {
     {

-      yyStateNum yystate = yystack->yytops.yystates[yyk]->yylrState;
+      yyStateNum yystate = yystackp->yytops.yystates[yyk]->yylrState;
+      YYDPRINTF ((stderr, "Stack %lu Entering state %d\n",
+                 (unsigned long int) yyk, yystate));
+
+      YYASSERT (yystate != YYFINAL);

 
 

-      assert (yystate != YYFINAL);

       if (yyisDefaultedState (yystate))
        {
          yyrule = yydefaultAction (yystate);
          if (yyrule == 0)
            {
       if (yyisDefaultedState (yystate))
        {
          yyrule = yydefaultAction (yystate);
          if (yyrule == 0)
            {

-             YYDPRINTF ((stderr, "Stack %d dies.\n", yyk));
-             yymarkStackDeleted (yystack, yyk);
+             YYDPRINTF ((stderr, "Stack %lu dies.\n",
+                         (unsigned long int) yyk));
+             yymarkStackDeleted (yystackp, yyk);

              return yyok;
            }
              return yyok;
            }

-         YYCHK (yyglrReduce (yystack, yyk, yyrule, yyfalse));
+         YYCHK (yyglrReduce (yystackp, yyk, yyrule, yyfalse]b4_user_args[));

        }
       else
        {
        }
       else
        {

-         if (*yytokenp == YYEMPTY)
+         yySymbol yytoken;
+         yystackp->yytops.yylookaheadNeeds[yyk] = yytrue;
+         if (yychar == YYEMPTY)

            {
            {

+             YYDPRINTF ((stderr, "Reading a token: "));

              yychar = YYLEX;
              yychar = YYLEX;

-             *yytokenp = YYTRANSLATE(yychar);
-             YYDPRINTF ((stderr, "Read token %s\n", yytokenName (*yytokenp)));
+             yytoken = YYTRANSLATE (yychar);
+             YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);

            }
            }

-         yygetLRActions (yystate, *yytokenp, &yyaction, &yyconflicts);
+         else
+           yytoken = YYTRANSLATE (yychar);
+         yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);

 
          while (*yyconflicts != 0)
            {
 
          while (*yyconflicts != 0)
            {

-             int yynewStack = yysplitStack (yystack, yyk);
-             YYDPRINTF ((stderr, "Splitting off stack %d from %d.\n",
-                         yynewStack, yyk));
-             YYCHK (yyglrReduce (yystack, yynewStack, *yyconflicts, yyfalse));
-             YYCHK (yyprocessOneStack (yystack, yynewStack, yyposn,
-                                       yylvalp, yyllocp));
+             size_t yynewStack = yysplitStack (yystackp, yyk);
+             YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n",
+                         (unsigned long int) yynewStack,
+                         (unsigned long int) yyk));
+             YYCHK (yyglrReduce (yystackp, yynewStack,
+                                 *yyconflicts, yyfalse]b4_user_args[));
+             YYCHK (yyprocessOneStack (yystackp, yynewStack,
+                                       yyposn]b4_pure_args[));

              yyconflicts += 1;
            }
 
          if (yyisShiftAction (yyaction))
              yyconflicts += 1;
            }
 
          if (yyisShiftAction (yyaction))

-           {
-             YYDPRINTF ((stderr, "Shifted token %s on stack %d, ",
-                         yytokenName (*yytokenp), yyk));
-             yyglrShift (yystack, yyk, yyaction, yyposn+1, *yylvalp, yyllocp);
-             YYDPRINTF ((stderr, "which is now in state #%d\n",
-                         yystack->yytops.yystates[yyk]->yylrState));
-             break;
-           }
+           break;

          else if (yyisErrorAction (yyaction))
            {
          else if (yyisErrorAction (yyaction))
            {

-             YYDPRINTF ((stderr, "Stack %d dies.\n", yyk));
-             yymarkStackDeleted (yystack, yyk);
+             YYDPRINTF ((stderr, "Stack %lu dies.\n",
+                         (unsigned long int) yyk));
+             yymarkStackDeleted (yystackp, yyk);

              break;
            }
          else
              break;
            }
          else

-           YYCHK (yyglrReduce (yystack, yyk, -yyaction, yyfalse));
+           YYCHK (yyglrReduce (yystackp, yyk, -yyaction,
+                               yyfalse]b4_user_args[));

        }
     }
   return yyok;
 }
 
        }
     }
   return yyok;
 }
 

-static void
-yyreportParseError (yyGLRStack* yystack, YYSTYPE* yylvalp, YYLTYPE* yyllocp)
+/*ARGSUSED*/ static void
+yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)

 {
 {

-  yySymbol* const yytokenp = yystack->yytokenp;
-
-  if (yystack->yyerrState == 0)
+  if (yystackp->yyerrState == 0)

     {
 #if YYERROR_VERBOSE
     {
 #if YYERROR_VERBOSE

-      int yyn, yyx, yycount, yysize;
-      char* yyprefix;
-      char* yyp;
-      char* yymsg;
-      yyn = yypact[yystack->yytops.yystates[0]->yylrState];
-      if (yyn > YYFLAG && yyn < YYLAST)
+      int yyn;
+      yyn = yypact[yystackp->yytops.yystates[0]->yylrState];
+      if (YYPACT_NINF < yyn && yyn < YYLAST)

        {
        {

-         yycount = 0;
+         yySymbol yytoken = YYTRANSLATE (yychar);
+         size_t yysize0 = yytnamerr (NULL, yytokenName (yytoken));
+         size_t yysize = yysize0;
+         size_t yysize1;
+         yybool yysize_overflow = yyfalse;
+         char* yymsg = NULL;
+         enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
+         char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
+         int yyx;
+         char *yyfmt;
+         char const *yyf;
+         static char const yyunexpected[] = "syntax error, unexpected %s";
+         static char const yyexpecting[] = ", expecting %s";
+         static char const yyor[] = " or %s";
+         char yyformat[sizeof yyunexpected
+                       + sizeof yyexpecting - 1
+                       + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2)
+                          * (sizeof yyor - 1))];
+         char const *yyprefix = yyexpecting;
+

          /* Start YYX at -YYN if negative to avoid negative indexes in
             YYCHECK.  */
          /* Start YYX at -YYN if negative to avoid negative indexes in
             YYCHECK.  */

-         yysize = sizeof ("parse error, unexpected ")
-           + strlen (yytokenName (*yytokenp));
-         yyprefix = ", expecting ";
-         for (yyx = yyn < 0 ? -yyn : 0; yyx < yytname_size && yycount <= 5;
-              yyx += 1)
-           if (yycheck[yyx + yyn] == yyx)
-             yysize += strlen (yytokenName (yyx)) + strlen (yyprefix),
-               yycount += 1, yyprefix = " or ";
-         yymsg = yyp = (char*) malloc (yysize);
-         yyp += sprintf (yyp, "parse error, unexpected %s",
-                         yytokenName (*yytokenp));
-         if (yycount < 5)
-           {
-             yyprefix = ", expecting ";
-             for (yyx = yyn < 0 ? -yyn : 0; yyx < yytname_size; yyx += 1)
-               if (yycheck[yyx + yyn] == yyx)
+         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 yycount = 1;
+
+         yyarg[0] = yytokenName (yytoken);
+         yyfmt = yystpcpy (yyformat, yyunexpected);
+
+         for (yyx = yyxbegin; yyx < yyxend; ++yyx)
+           if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
+             {
+               if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)

                  {
                  {

-                   yyp += sprintf (yyp, "%s%s", yyprefix, yytokenName (yyx));
-                   yyprefix = " or ";
+                   yycount = 1;
+                   yysize = yysize0;
+                   yyformat[sizeof yyunexpected - 1] = '\0';
+                   break;

                  }
                  }

+               yyarg[yycount++] = yytokenName (yyx);
+               yysize1 = yysize + yytnamerr (NULL, yytokenName (yyx));
+               yysize_overflow |= yysize1 < yysize;
+               yysize = yysize1;
+               yyfmt = yystpcpy (yyfmt, yyprefix);
+               yyprefix = yyor;
+             }
+
+         yyf = YY_(yyformat);
+         yysize1 = yysize + strlen (yyf);
+         yysize_overflow |= yysize1 < yysize;
+         yysize = yysize1;
+
+         if (!yysize_overflow)
+           yymsg = (char *) YYMALLOC (yysize);
+
+         if (yymsg)
+           {
+             char *yyp = yymsg;
+             int yyi = 0;
+             while ((*yyp = *yyf))
+               {
+                 if (*yyp == '%' && yyf[1] == 's' && yyi < yycount)
+                   {
+                     yyp += yytnamerr (yyp, yyarg[yyi++]);
+                     yyf += 2;
+                   }
+                 else
+                   {
+                     yyp++;
+                     yyf++;
+                   }
+               }
+             yyerror (]b4_lyyerror_args[yymsg);
+             YYFREE (yymsg);
+           }
+         else
+           {
+             yyerror (]b4_lyyerror_args[YY_("syntax error"));
+             yyMemoryExhausted (yystackp);

            }
            }

-         yyerror (yymsg);
-         free (yymsg);

        }
       else
        }
       else

-#endif
-       yyerror ("parse error");
+#endif /* YYERROR_VERBOSE */
+       yyerror (]b4_lyyerror_args[YY_("syntax error"));

       yynerrs += 1;
     }
 }
 
       yynerrs += 1;
     }
 }
 

-/* Recover from a syntax error on STACK, assuming that TOKENP,
-   YYLVALP, and YYLLOCP point to the syntactic category, semantic
-   value, and location of the lookahead.
-   NOTE: This uses the panic-mode recovery algorithm described in the
-   Bison documentation, which differs from what is in bison.simple.
-   Specifically, this routine performs no reductions before shifting
-   the error token. */
-static void
-yyrecoverParseError (yyGLRStack* yystack, YYSTYPE* yylvalp, YYLTYPE* yyllocp)
+/* Recover from a syntax error on *YYSTACKP, assuming that *YYSTACKP->YYTOKENP,
+   yylval, and yylloc are the syntactic category, semantic value, and location
+   of the look-ahead.  */
+/*ARGSUSED*/ static void
+yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)

 {
 {

-  yySymbol* const yytokenp = yystack->yytokenp;
-  int yyk, yyj;
+  size_t yyk;
+  int yyj;

 
 

-  if (yystack->yyerrState == 0)
-    yystack->yyerrState = 3;
-  else if (yystack->yyerrState == 3)
-    {
-      /* We just shifted the error token and (perhaps) took some
-        reductions. Skip tokens until we can proceed. */
-      do {
-       if (*yytokenp == YYEOF)
-         yyFail (yystack, NULL);
-       if (*yytokenp != YYEMPTY)
-         YYDPRINTF ((stderr, "Discarding token %s\n",
-                     yytokenName (*yytokenp)));
+  if (yystackp->yyerrState == 3)
+    /* We just shifted the error token and (perhaps) took some
+       reductions.  Skip tokens until we can proceed.  */
+    while (YYID (yytrue))
+      {
+       yySymbol yytoken;
+       if (yychar == YYEOF)
+         yyFail (yystackp][]b4_lpure_args[, NULL);
+       if (yychar != YYEMPTY)
+         {]b4_location_if([[
+           /* We throw away the lookahead, but the error range
+              of the shifted error token must take it into account.  */
+           yyGLRState *yys = yystackp->yytops.yystates[0];
+           yyGLRStackItem yyerror_range[3];
+           yyerror_range[1].yystate.yyloc = yys->yyloc;
+           yyerror_range[2].yystate.yyloc = yylloc;
+           YYLLOC_DEFAULT ((yys->yyloc), yyerror_range, 2);]])[
+           yytoken = YYTRANSLATE (yychar);
+           yydestruct ("Error: discarding",
+                       yytoken, &yylval]b4_location_if([, &yylloc])[]b4_user_args[);
+         }
+       YYDPRINTF ((stderr, "Reading a token: "));

        yychar = YYLEX;
        yychar = YYLEX;

-       *yytokenp = YYTRANSLATE (yychar);
-       YYDPRINTF ((stderr, "Read token %s\n", yytokenName (*yytokenp)));
-       yyj = yypact[yystack->yytops.yystates[0]->yylrState];
-       if (yyj == YYFLAG)
-         /* Something's not right; we shouldn't be here */
-         yyFail (yystack, NULL);
-       yyj += *yytokenp;
-       if (yyj < 0 || yyj > YYLAST || yycheck[yyj] != *yytokenp)
+       yytoken = YYTRANSLATE (yychar);
+       YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+       yyj = yypact[yystackp->yytops.yystates[0]->yylrState];
+       if (yyis_pact_ninf (yyj))
+         return;
+       yyj += yytoken;
+       if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != yytoken)

          {
          {

-           if (yydefact[yystack->yytops.yystates[0]->yylrState] != 0)
+           if (yydefact[yystackp->yytops.yystates[0]->yylrState] != 0)

              return;
          }
              return;
          }

-       else if (yytable[yyj] != 0 && yytable[yyj] != YYFLAG)
+       else if (yytable[yyj] != 0 && ! yyis_table_ninf (yytable[yyj]))

          return;
          return;

-      } while (yytrue);
-    }
+      }

 
 

-  /* Reduce to one stack */
-  for (yyk = 0; yyk < yystack->yytops.yysize; yyk += 1)
-    if (yystack->yytops.yystates[yyk] != NULL)
+  /* Reduce to one stack.  */
+  for (yyk = 0; yyk < yystackp->yytops.yysize; yyk += 1)
+    if (yystackp->yytops.yystates[yyk] != NULL)

       break;
       break;

-  if (yyk >= yystack->yytops.yysize)
-    yyFail (yystack, NULL);
-  for (yyk += 1; yyk < yystack->yytops.yysize; yyk += 1)
-    yymarkStackDeleted (yystack, yyk);
-  yyremoveDeletes (yystack);
-  yycompressStack (yystack);
-
-  /* Now pop stack until we find a state that shifts the error token. */
-  while (yystack->yytops.yystates[0] != NULL)
+  if (yyk >= yystackp->yytops.yysize)
+    yyFail (yystackp][]b4_lpure_args[, NULL);
+  for (yyk += 1; yyk < yystackp->yytops.yysize; yyk += 1)
+    yymarkStackDeleted (yystackp, yyk);
+  yyremoveDeletes (yystackp);
+  yycompressStack (yystackp);
+
+  /* Now pop stack until we find a state that shifts the error token.  */
+  yystackp->yyerrState = 3;
+  while (yystackp->yytops.yystates[0] != NULL)

     {
     {

-      yyj = yypact[yystack->yytops.yystates[0]->yylrState] + YYTERROR;
-      if (yyj != YYFLAG + YYTERROR && yyj >= 0 && yyj <= YYLAST &&
-         yycheck[yyj] == YYTERROR && yyisShiftAction (yytable[yyj]))
+      yyGLRState *yys = yystackp->yytops.yystates[0];
+      yyj = yypact[yys->yylrState];
+      if (! yyis_pact_ninf (yyj))

        {
        {

-         yyglrShift (yystack, 0, yytable[yyj],
-                     yystack->yytops.yystates[0]->yyposn, *yylvalp, yyllocp);
-         break;
+         yyj += YYTERROR;
+         if (0 <= yyj && yyj <= YYLAST && yycheck[yyj] == YYTERROR
+             && yyisShiftAction (yytable[yyj]))
+           {
+             /* Shift the error token having adjusted its location.  */
+             YYLTYPE yyerrloc;]b4_location_if([[
+             yystackp->yyerror_range[2].yystate.yyloc = yylloc;
+             YYLLOC_DEFAULT (yyerrloc, (yystackp->yyerror_range), 2);]])[
+             YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]],
+                              &yylval, &yyerrloc);
+             yyglrShift (yystackp, 0, yytable[yyj],
+                         yys->yyposn, &yylval, &yyerrloc);
+             yys = yystackp->yytops.yystates[0];
+             break;
+           }

        }
        }

-      yystack->yytops.yystates[0] = yystack->yytops.yystates[0]->yypred;
-      yystack->yynextFree -= 1;
-      yystack->yyspaceLeft += 1;
+]b4_location_if([[      yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
+      yydestroyGLRState ("Error: popping", yys]b4_user_args[);
+      yystackp->yytops.yystates[0] = yys->yypred;
+      yystackp->yynextFree -= 1;
+      yystackp->yyspaceLeft += 1;

     }
     }

-  if (yystack->yytops.yystates[0] == NULL)
-    yyFail (yystack, NULL);
+  if (yystackp->yytops.yystates[0] == NULL)
+    yyFail (yystackp][]b4_lpure_args[, NULL);

 }
 
 #define YYCHK1(YYE)                                                         \
   do {                                                                      \
     switch (YYE) {                                                          \
 }
 
 #define YYCHK1(YYE)                                                         \
   do {                                                                      \
     switch (YYE) {                                                          \

-    default:                                                                \
+    case yyok:                                                              \

       break;                                                                \
     case yyabort:                                                           \
       break;                                                                \
     case yyabort:                                                           \

-      yystack.yyerrflag = 1;                                                \
-      goto yyDone;                                                          \
+      goto yyabortlab;                                                      \

     case yyaccept:                                                          \
     case yyaccept:                                                          \

-      yystack.yyerrflag = 0;                                                \
-      goto yyDone;                                                          \
+      goto yyacceptlab;                                                             \

     case yyerr:                                                                     \
       goto yyuser_error;                                                    \
     case yyerr:                                                                     \
       goto yyuser_error;                                                    \

+    default:                                                                \
+      goto yybuglab;                                                        \

     }                                                                       \
     }                                                                       \

-  } while (0)
+  } while (YYID (0))
+
+
+/*----------.
+| yyparse.  |
+`----------*/

 
 

-int
-yyparse (YYPARSE_PARAM_ARG)
+]b4_c_ansi_function_def([yyparse], [int], b4_parse_param)[

 {
 {

-  yySymbol yytoken;
+  int yyresult;

   yyGLRStack yystack;
   yyGLRStack yystack;

+  yyGLRStack* const yystackp = &yystack;

   size_t yyposn;
   size_t yyposn;

-]b4_pure_if(
-[
-  YYSTYPE yylval;
-  YYLTYPE yylloc;
-  #undef yychar
-  #define yychar (yystack.yyrawchar)
-])[
-
-  YYSTYPE* const yylvalp = &yylval;
-  YYLTYPE* const yyllocp = &yylloc;

 
 

-  yyinitGLRStack (&yystack, YYINITDEPTH);
-  yystack.yytokenp = &yytoken;
+  YYDPRINTF ((stderr, "Starting parse\n"));

 
 

-  if (setjmp (yystack.yyexception_buffer) != 0)
-    goto yyDone;
-
-  yyglrShift (&yystack, 0, 0, 0, yyval_default, &yyloc_default);
-  yytoken = YYEMPTY;
+  yychar = YYEMPTY;
+  yylval = yyval_default;
+]b4_location_if([
+#if YYLTYPE_IS_TRIVIAL
+  yylloc.first_line   = yylloc.last_line   = 1;
+  yylloc.first_column = yylloc.last_column = 0;
+#endif
+])
+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 glr.c.  */
+b4_syncline([@oline@], [@ofile@])])dnl
+[
+  if (! yyinitGLRStack (yystackp, YYINITDEPTH))
+    goto yyexhaustedlab;
+  switch (YYSETJMP (yystack.yyexception_buffer))
+    {
+    case 0: break;
+    case 1: goto yyabortlab;
+    case 2: goto yyexhaustedlab;
+    default: goto yybuglab;
+    }
+  yyglrShift (&yystack, 0, 0, 0, &yylval, &yylloc);

   yyposn = 0;
 
   yyposn = 0;
 

-  while (yytrue)
+  while (YYID (yytrue))

     {
     {

-      /* For efficiency, we have two loops, of which the first of which
-       * is specialized to deterministic operation (single stack, no
-       * potential ambiguity). */
-
+      /* For efficiency, we have two loops, the first of which is
+        specialized to deterministic operation (single stack, no
+        potential ambiguity).  */

       /* Standard mode */
       /* Standard mode */

-      while (yytrue)
+      while (YYID (yytrue))

        {
          yyRuleNum yyrule;
          int yyaction;
        {
          yyRuleNum yyrule;
          int yyaction;

-         const short* yyconflicts;
+         const short int* yyconflicts;

 
          yyStateNum yystate = yystack.yytops.yystates[0]->yylrState;
 
          yyStateNum yystate = yystack.yytops.yystates[0]->yylrState;

+         YYDPRINTF ((stderr, "Entering state %d\n", yystate));

          if (yystate == YYFINAL)
          if (yystate == YYFINAL)

-           goto yyDone;
+           goto yyacceptlab;

          if (yyisDefaultedState (yystate))
            {
              yyrule = yydefaultAction (yystate);
              if (yyrule == 0)
                {
          if (yyisDefaultedState (yystate))
            {
              yyrule = yydefaultAction (yystate);
              if (yyrule == 0)
                {

-                 yyreportParseError (&yystack, yylvalp, yyllocp);
+]b4_location_if([[               yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+                 yyreportSyntaxError (&yystack]b4_user_args[);

                  goto yyuser_error;
                }
                  goto yyuser_error;
                }

-             YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue));
+             YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue]b4_user_args[));

            }
          else
            {
            }
          else
            {

-             if (yytoken == YYEMPTY)
+             yySymbol yytoken;
+             if (yychar == YYEMPTY)

                {
                {

+                 YYDPRINTF ((stderr, "Reading a token: "));

                  yychar = YYLEX;
                  yytoken = YYTRANSLATE (yychar);
                  yychar = YYLEX;
                  yytoken = YYTRANSLATE (yychar);

-                 YYDPRINTF ((stderr, "Read token %s\n",
-                             yytokenName (yytoken)));
+                 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);

                }
                }

+             else
+               yytoken = YYTRANSLATE (yychar);

              yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
              if (*yyconflicts != 0)
                break;
              if (yyisShiftAction (yyaction))
                {
              yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
              if (*yyconflicts != 0)
                break;
              if (yyisShiftAction (yyaction))
                {

-                 YYDPRINTF ((stderr, "Shifted token %s. ",
-                             yytokenName (yytoken)));
-                 if (yytoken != YYEOF)
-                   yytoken = YYEMPTY;
+                 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
+                 if (yychar != YYEOF)
+                   yychar = YYEMPTY;

                  yyposn += 1;
                  yyposn += 1;

-                 yyglrShift (&yystack, 0, yyaction, yyposn, yylval, yyllocp);
-                 if (yystack.yyerrState > 0)
+                 yyglrShift (&yystack, 0, yyaction, yyposn, &yylval, &yylloc);
+                 if (0 < yystack.yyerrState)

                    yystack.yyerrState -= 1;
                    yystack.yyerrState -= 1;

-                 YYDPRINTF ((stderr, "Now in state #%d\n",
-                             yystack.yytops.yystates[0]->yylrState));

                }
              else if (yyisErrorAction (yyaction))
                {
                }
              else if (yyisErrorAction (yyaction))
                {

-                 yyreportParseError (&yystack, yylvalp, yyllocp);
+]b4_location_if([[               yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+                 yyreportSyntaxError (&yystack]b4_user_args[);

                  goto yyuser_error;
                }
              else
                  goto yyuser_error;
                }
              else

-               YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue));
+               YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue]b4_user_args[));

            }
        }
 
            }
        }
 

-      while (yytrue)
+      while (YYID (yytrue))

        {
        {

-         int yys;
-         int yyn = yystack.yytops.yysize;
-         for (yys = 0; yys < yyn; yys += 1)
-           YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn,
-                                      yylvalp, yyllocp));
-         yytoken = YYEMPTY;
-         yyposn += 1;
+         yySymbol yytoken_to_shift;
+         size_t yys;
+
+         for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
+           yystackp->yytops.yylookaheadNeeds[yys] = yychar != YYEMPTY;
+
+         /* yyprocessOneStack returns one of three things:
+
+             - An error flag.  If the caller is yyprocessOneStack, it
+               immediately returns as well.  When the caller is finally
+               yyparse, it jumps to an error label via YYCHK1.
+
+             - yyok, but yyprocessOneStack has invoked yymarkStackDeleted
+               (&yystack, yys), which sets the top state of yys to NULL.  Thus,
+               yyparse's following invocation of yyremoveDeletes will remove
+               the stack.
+
+             - yyok, when ready to shift a token.
+
+            Except in the first case, yyparse will invoke yyremoveDeletes and
+            then shift the next token onto all remaining stacks.  This
+            synchronization of the shift (that is, after all preceding
+            reductions on all stacks) helps prevent double destructor calls
+            on yylval in the event of memory exhaustion.  */
+
+         for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
+           YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn]b4_lpure_args[));

          yyremoveDeletes (&yystack);
          if (yystack.yytops.yysize == 0)
            {
              yyundeleteLastStack (&yystack);
              if (yystack.yytops.yysize == 0)
          yyremoveDeletes (&yystack);
          if (yystack.yytops.yysize == 0)
            {
              yyundeleteLastStack (&yystack);
              if (yystack.yytops.yysize == 0)

-               yyFail (&yystack, "parse error");
-             YYCHK1 (yyresolveStack (&yystack));
+               yyFail (&yystack][]b4_lpure_args[, YY_("syntax error"));
+             YYCHK1 (yyresolveStack (&yystack]b4_user_args[));

              YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
              YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));

-             yyreportParseError (&yystack, yylvalp, yyllocp);
+]b4_location_if([[           yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+             yyreportSyntaxError (&yystack]b4_user_args[);

              goto yyuser_error;
            }
              goto yyuser_error;
            }

-         else if (yystack.yytops.yysize == 1)
+
+         /* If any yyglrShift call fails, it will fail after shifting.  Thus,
+            a copy of yylval will already be on stack 0 in the event of a
+            failure in the following loop.  Thus, yychar is set to YYEMPTY
+            before the loop to make sure the user destructor for yylval isn't
+            called twice.  */
+         yytoken_to_shift = YYTRANSLATE (yychar);
+         yychar = YYEMPTY;
+         yyposn += 1;
+         for (yys = 0; yys < yystack.yytops.yysize; yys += 1)

            {
            {

-             YYCHK1 (yyresolveStack (&yystack));
+             int yyaction;
+             const short int* yyconflicts;
+             yyStateNum yystate = yystack.yytops.yystates[yys]->yylrState;
+             yygetLRActions (yystate, yytoken_to_shift, &yyaction,
+                             &yyconflicts);
+             /* Note that yyconflicts were handled by yyprocessOneStack.  */
+             YYDPRINTF ((stderr, "On stack %lu, ", (unsigned long int) yys));
+             YY_SYMBOL_PRINT ("shifting", yytoken_to_shift, &yylval, &yylloc);
+             yyglrShift (&yystack, yys, yyaction, yyposn,
+                         &yylval, &yylloc);
+             YYDPRINTF ((stderr, "Stack %lu now in state #%d\n",
+                         (unsigned long int) yys,
+                         yystack.yytops.yystates[yys]->yylrState));
+           }
+
+         if (yystack.yytops.yysize == 1)
+           {
+             YYCHK1 (yyresolveStack (&yystack]b4_user_args[));

              YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
              yycompressStack (&yystack);
              break;
              YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
              yycompressStack (&yystack);
              break;


@@ -1709,32 +2463,84 @@ yyparse (YYPARSE_PARAM_ARG)
        }
       continue;
     yyuser_error:
        }
       continue;
     yyuser_error:

-      yyrecoverParseError (&yystack, yylvalp, yyllocp);
+      yyrecoverSyntaxError (&yystack]b4_user_args[);

       yyposn = yystack.yytops.yystates[0]->yyposn;
     }
       yyposn = yystack.yytops.yystates[0]->yyposn;
     }

- yyDone:
-  ;

 
 

-  yyfreeGLRStack (&yystack);
-  return yystack.yyerrflag;
+ yyacceptlab:
+  yyresult = 0;
+  goto yyreturn;
+
+ yybuglab:
+  YYASSERT (yyfalse);
+  goto yyabortlab;
+
+ yyabortlab:
+  yyresult = 1;
+  goto yyreturn;
+
+ yyexhaustedlab:
+  yyerror (]b4_lyyerror_args[YY_("memory exhausted"));
+  yyresult = 2;
+  goto yyreturn;
+
+ yyreturn:
+  if (yychar != YYEOF && yychar != YYEMPTY)
+    yydestruct ("Cleanup: discarding lookahead",
+               YYTRANSLATE (yychar),
+               &yylval]b4_location_if([, &yylloc])[]b4_user_args[);
+
+  /* If the stack is well-formed, pop the stack until it is empty,
+     destroying its entries as we go.  But free the stack regardless
+     of whether it is well-formed.  */
+  if (yystack.yyitems)
+    {
+      yyGLRState** yystates = yystack.yytops.yystates;
+      if (yystates)
+       {
+         size_t yysize = yystack.yytops.yysize;
+         size_t yyk;
+         for (yyk = 0; yyk < yysize; yyk += 1)
+           if (yystates[yyk])
+             {
+               while (yystates[yyk])
+                 {
+                   yyGLRState *yys = yystates[yyk];
+]b4_location_if([[                 yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
+)[                 yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
+                   yystates[yyk] = yys->yypred;
+                   yystack.yynextFree -= 1;
+                   yystack.yyspaceLeft += 1;
+                 }
+               break;
+             }
+       }
+      yyfreeGLRStack (&yystack);
+    }
+
+  return yyresult;

 }
 
 /* DEBUGGING ONLY */
 }
 
 /* DEBUGGING ONLY */

+#ifdef YYDEBUG
+static void yypstack (yyGLRStack* yystackp, size_t yyk)
+  __attribute__ ((__unused__));
+static void yypdumpstack (yyGLRStack* yystackp) __attribute__ ((__unused__));

 
 

-void
-yypstates (yyGLRState* yyst)
+static void
+yy_yypstack (yyGLRState* yys)

 {
 {

-  void yy_yypstack (yyGLRState* yys)
+  if (yys->yypred)

     {
     {

-      if (yys->yypred == NULL)
-       fprintf (stderr, "%d@%d", yys->yylrState, yys->yyposn);
-      else
-       {
-         yy_yypstack (yys->yypred);
-         fprintf (stderr, " -> %d@%d", yys->yylrState, yys->yyposn);
-       }
+      yy_yypstack (yys->yypred);
+      fprintf (stderr, " -> ");

     }
     }

+  fprintf (stderr, "%d@@%lu", yys->yylrState, (unsigned long int) yys->yyposn);
+}

 
 

+static void
+yypstates (yyGLRState* yyst)
+{

   if (yyst == NULL)
     fprintf (stderr, "<null>");
   else
   if (yyst == NULL)
     fprintf (stderr, "<null>");
   else


@@ -1742,86 +2548,66 @@ yypstates (yyGLRState* yyst)
   fprintf (stderr, "\n");
 }
 
   fprintf (stderr, "\n");
 }
 

-void
-yypstack (yyGLRStack* yystack, int yyk)
+static void
+yypstack (yyGLRStack* yystackp, size_t yyk)

 {
 {

-  yypstates (yystack->yytops.yystates[yyk]);
+  yypstates (yystackp->yytops.yystates[yyk]);

 }
 
 }
 

-#define YYINDEX(YYX)                                                        \
-    ((YYX) == NULL ? -1 : (yyGLRStackItem*) (YYX) - yystack->yyitems)
+#define YYINDEX(YYX)                                                        \
+    ((YYX) == NULL ? -1 : (yyGLRStackItem*) (YYX) - yystackp->yyitems)

 
 
 
 

-void
-yypdumpstack (yyGLRStack* yystack)
+static void
+yypdumpstack (yyGLRStack* yystackp)

 {
   yyGLRStackItem* yyp;
 {
   yyGLRStackItem* yyp;

-  int yyi;
-  for (yyp = yystack->yyitems; yyp < yystack->yynextFree; yyp += 1)
+  size_t yyi;
+  for (yyp = yystackp->yyitems; yyp < yystackp->yynextFree; yyp += 1)

     {
     {

-      fprintf (stderr, "%3d. ", yyp - yystack->yyitems);
-      if (*(bool*) yyp)
+      fprintf (stderr, "%3lu. ", (unsigned long int) (yyp - yystackp->yyitems));
+      if (*(yybool *) yyp)

        {
        {

-         fprintf (stderr, "Res: %d, LR State: %d, posn: %d, pred: %d",
+         fprintf (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",

                   yyp->yystate.yyresolved, yyp->yystate.yylrState,
                   yyp->yystate.yyresolved, yyp->yystate.yylrState,

-                  yyp->yystate.yyposn,
-                  YYINDEX(yyp->yystate.yypred));
+                  (unsigned long int) yyp->yystate.yyposn,
+                  (long int) YYINDEX (yyp->yystate.yypred));

          if (! yyp->yystate.yyresolved)
          if (! yyp->yystate.yyresolved)

-           fprintf (stderr, ", firstVal: %d",
-                    YYINDEX (yyp->yystate.yysemantics.yyfirstVal));
+           fprintf (stderr, ", firstVal: %ld",
+                    (long int) YYINDEX (yyp->yystate.yysemantics.yyfirstVal));

        }
       else
        {
        }
       else
        {

-         fprintf (stderr, "Option. rule: %d, state: %d, next: %d",
-                  yyp->yyoption.yyrule, YYINDEX (yyp->yyoption.yystate),
-                  YYINDEX (yyp->yyoption.yynext));
+         fprintf (stderr, "Option. rule: %d, state: %ld, next: %ld",
+                  yyp->yyoption.yyrule,
+                  (long int) YYINDEX (yyp->yyoption.yystate),
+                  (long int) YYINDEX (yyp->yyoption.yynext));

        }
       fprintf (stderr, "\n");
     }
   fprintf (stderr, "Tops:");
        }
       fprintf (stderr, "\n");
     }
   fprintf (stderr, "Tops:");

-  for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1)
-    fprintf (stderr, "%d: %d; ", yyi, YYINDEX (yystack->yytops.yystates[yyi]));
+  for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)
+    fprintf (stderr, "%lu: %ld; ", (unsigned long int) yyi,
+            (long int) YYINDEX (yystackp->yytops.yystates[yyi]));

   fprintf (stderr, "\n");
 }
   fprintf (stderr, "\n");
 }

-
+#endif

 ]
 
 b4_epilogue
 m4_if(b4_defines_flag, 0, [],
 ]
 
 b4_epilogue
 m4_if(b4_defines_flag, 0, [],

-[#output "b4_output_header_name"
-b4_copyright([Skeleton parser for GLR parsing with Bison], [2002])
-#ifndef b4_header_guard
-# define b4_header_guard
-
-b4_token_defines(b4_tokens)
-
-#ifndef YYSTYPE
-m4_ifdef([b4_stype],
-[#line b4_stype_line "b4_filename"
-typedef union b4_stype yystype;
-/* Line __line__ of __file__.  */
-#line __oline__ "__ofile__"],
-[typedef int yystype;])
-# define YYSTYPE yystype
-#endif
+[@output @output_header_name@
+b4_copyright([Skeleton parser for GLR parsing with Bison],
+            [2002, 2003, 2004, 2005, 2006])[
+
+/* C GLR parser skeleton written by Paul Hilfinger.  */
+]

 
 

-b4_pure_if([],
-[extern YYSTYPE b4_prefix[]lval;])
+b4_shared_declarations

 
 

-b4_location_if(
-[#ifndef YYLTYPE
-typedef struct yyltype
-{
-  int yyfirst_line;
-  int yyfirst_column;
-  int yylast_line;
-  int yylast_column;
-} yyltype;
-# define YYLTYPE yyltype
-#endif
+extern YYSTYPE b4_prefix[]lval;

 
 

-m4_if(b4_pure, [0],
+b4_location_if([b4_pure_if([],

 [extern YYLTYPE b4_prefix[]lloc;])
 ])
 [extern YYLTYPE b4_prefix[]lloc;])
 ])

-#endif /* not b4_header_guard */

 ])
 ])