* tests/glr-regression.at (Uninitialized location when reporting

[bison.git] / data / glr.c

diff --git a/data/glr.c b/data/glr.c
index fa6bde67080ec8cfb3e81d587ac7607669de40f6..a810bcdc4e0f9e036f8df48236f453a98078f945 100644 (file)
--- a/data/glr.c
+++ b/data/glr.c
@@ -1,7 +1,7 @@
 m4_divert(-1)                                                       -*- C -*-
 
 # GLR skeleton for Bison
 m4_divert(-1)                                                       -*- C -*-
 
 # GLR skeleton for Bison

-# Copyright (C) 2002, 2003, 2004, 2005 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


@@ -19,6 +19,8 @@ m4_divert(-1)                                                       -*- C -*-
 # 02110-1301  USA
 
 
 # 02110-1301  USA
 
 

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

 ## ---------------- ##
 ## Default values.  ##
 ## ---------------- ##
 ## ---------------- ##
 ## Default values.  ##
 ## ---------------- ##


@@ -34,25 +36,30 @@ m4_define_default([b4_stack_depth_init],  [200])
 ## ------------------------ ##
 
 
 ## ------------------------ ##
 
 

+# 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],
 # 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 *]], [[yylvalp]]][]dnl
-b4_location_if([, [[YYLTYPE *], [yyllocp]]])])dnl
+m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
+b4_location_if([, [[YYLTYPE *], [&yylloc]]])])dnl

 m4_ifdef([b4_lex_param], [, ]b4_lex_param)))
 
 
 m4_ifdef([b4_lex_param], [, ]b4_lex_param)))
 
 

-# b4_user_formals
-# ---------------
-m4_define([b4_user_formals],
-[m4_ifset([b4_parse_param], [, b4_c_ansi_formals(b4_parse_param)])])
-
-

 # b4_yyerror_args
 # ---------------
 # b4_yyerror_args
 # ---------------

-# Arguments passed to yyerror: user args plus yylloc.
+# 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), ])])
 m4_define([b4_yyerror_args],
 [b4_pure_if([b4_location_if([yylocp, ])])dnl
 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])


@@ -60,38 +67,31 @@ m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
 
 # b4_lyyerror_args
 # ----------------
 
 # b4_lyyerror_args
 # ----------------

-# Same as above, but on the look-ahead, hence yyllocp instead of yylocp.
+# Same as above, but on the look-ahead, hence &yylloc instead of yylocp.

 m4_define([b4_lyyerror_args],
 m4_define([b4_lyyerror_args],

-[b4_pure_if([b4_location_if([yyllocp, ])])dnl
+[b4_pure_if([b4_location_if([&yylloc, ])])dnl

 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
 
 
 # b4_pure_args
 # ------------
 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
 
 
 # b4_pure_args
 # ------------

-# Arguments needed by yyerror: user args plus yylloc.
+# 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])
 
 
 m4_define([b4_pure_args],
 [b4_pure_if([b4_location_if([, yylocp])])[]b4_user_args])
 
 

-# b4_pure_formals
-# ---------------
-# Arguments passed to yyerror: user formals plus yyllocp.
-m4_define([b4_pure_formals],
-[b4_pure_if([b4_location_if([, YYLTYPE *yylocp])])[]b4_user_formals])
-
-

 # b4_lpure_args
 # -------------
 # b4_lpure_args
 # -------------

-# Same as above, but on the look-ahead, hence yyllocp instead of yylocp.
+# Same as above, but on the look-ahead, hence &yylloc instead of yylocp.

 m4_define([b4_lpure_args],
 m4_define([b4_lpure_args],

-[b4_pure_if([b4_location_if([, yyllocp])])[]b4_user_args])
+[b4_pure_if([b4_location_if([, &yylloc])])[]b4_user_args])

 
 
 
 

-# b4_lpure_formals
-# ----------------
-# Same as above, but on the look-ahead, hence yyllocp instead of yylocp.
-m4_define([b4_lpure_formals],
-[b4_pure_if([b4_location_if([YYLTYPE *yyllocp])])[]b4_user_formals])
+# 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])

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


@@ -111,7 +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],

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

 
 
 
 
 
 


@@ -131,18 +131,25 @@ 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],

-[(((yyGLRStackItem const *)yyvsp)@{YYFILL (m4_eval([$2 - $1]))@}.yystate.yyloc)])
+[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yyloc)])
+
+
+
+## -------------- ##
+## Output files.  ##
+## -------------- ##

 
 # We do want M4 expansion after # for CPP macros.
 m4_changecom()
 m4_divert(0)dnl
 @output @output_parser_name@
 b4_copyright([Skeleton parser for GLR parsing with Bison],
 
 # We do want M4 expansion after # for CPP macros.
 m4_changecom()
 m4_divert(0)dnl
 @output @output_parser_name@
 b4_copyright([Skeleton parser for GLR parsing with Bison],

-  [2002, 2003, 2004, 2005])
+  [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.  */

 
 ]b4_identification
 
 ]b4_identification

+

 m4_if(b4_prefix[], [yy], [],
 [/* Substitute the variable and function names.  */
 #define yyparse b4_prefix[]parse
 m4_if(b4_prefix[], [yy], [],
 [/* Substitute the variable and function names.  */
 #define yyparse b4_prefix[]parse


@@ -152,43 +159,31 @@ m4_if(b4_prefix[], [yy], [],
 #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

-#define yylloc b4_prefix[]lloc])
+#define yylloc  b4_prefix[]lloc])

 
 

-b4_token_enums(b4_tokens)
+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[
-
-/* Enabling traces.  */
-#ifndef YYDEBUG
-# define YYDEBUG ]b4_debug[
-#endif
+]b4_pre_prologue[

 
 

-/* Enabling verbose error messages.  */
-#ifdef YYERROR_VERBOSE
-# undef YYERROR_VERBOSE
-# define YYERROR_VERBOSE 1
-#else
-# define YYERROR_VERBOSE ]b4_error_verbose[
-#endif
-
-/* Enabling the token table.  */
-#ifndef YYTOKEN_TABLE
-# define YYTOKEN_TABLE ]b4_token_table[
-#endif
-
-#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED

 ]m4_ifdef([b4_stype],
 ]m4_ifdef([b4_stype],

-[b4_syncline([b4_stype_line], [b4_file_name])
-typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])b4_stype YYSTYPE;
+[typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])
+b4_stype

 /* Line __line__ of glr.c.  */
 /* Line __line__ of glr.c.  */

-b4_syncline([@oline@], [@ofile@])],
+b4_syncline([@oline@], [@ofile@])
+       YYSTYPE;],

 [typedef int YYSTYPE;])[
 # define YYSTYPE_IS_DECLARED 1
 # define YYSTYPE_IS_TRIVIAL 1
 #endif
 
 [typedef int YYSTYPE;])[
 # define YYSTYPE_IS_DECLARED 1
 # define YYSTYPE_IS_TRIVIAL 1
 #endif
 

-#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED)
+#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED

 typedef struct YYLTYPE
 {
 ]b4_location_if([
 typedef struct YYLTYPE
 {
 ]b4_location_if([


@@ -203,12 +198,35 @@ typedef struct YYLTYPE
 # define YYLTYPE_IS_DECLARED 1
 # define YYLTYPE_IS_TRIVIAL 1
 #endif
 # 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
+# define YYDEBUG ]b4_debug[
+#endif
+
+/* Enabling verbose error messages.  */
+#ifdef YYERROR_VERBOSE
+# undef YYERROR_VERBOSE
+# define YYERROR_VERBOSE 1
+#else
+# define YYERROR_VERBOSE ]b4_error_verbose[
+#endif
+
+/* Enabling the token table.  */
+#ifndef YYTOKEN_TABLE
+# define YYTOKEN_TABLE ]b4_token_table[
+#endif

 
 /* 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
 
 /* 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. */
+   technically correct.  */

 static YYSTYPE yyval_default;
 
 /* Copy the second part of user declarations.  */
 static YYSTYPE yyval_default;
 
 /* Copy the second part of user declarations.  */


@@ -234,6 +252,23 @@ b4_syncline([@oline@], [@ofile@])
 # endif
 #endif
 
 # 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 YYFREE
 # define YYFREE free
 #endif


@@ -267,7 +302,7 @@ b4_syncline([@oline@], [@ofile@])
 
 #ifndef __attribute__
 /* This feature is available in gcc versions 2.5 and later.  */
 
 #ifndef __attribute__
 /* This feature is available in gcc versions 2.5 and later.  */

-# if (!defined (__GNUC__) || __GNUC__ < 2 \
+# if (! defined __GNUC__ || __GNUC__ < 2 \

       || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__)
 #  define __attribute__(Spec) /* empty */
 # endif
       || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__)
 #  define __attribute__(Spec) /* empty */
 # endif


@@ -284,23 +319,23 @@ b4_syncline([@oline@], [@ofile@])
 # define YYASSERT(condition) ((void) ((condition) || (abort (), 0)))
 #endif
 
 # define YYASSERT(condition) ((void) ((condition) || (abort (), 0)))
 #endif
 

-/* YYFINAL -- State number of the termination state. */
+/* YYFINAL -- State number of the termination state.  */

 #define YYFINAL  ]b4_final_state_number[
 /* YYLAST -- Last index in YYTABLE.  */
 #define YYLAST   ]b4_last[
 
 #define YYFINAL  ]b4_final_state_number[
 /* YYLAST -- Last index in YYTABLE.  */
 #define YYLAST   ]b4_last[
 

-/* YYNTOKENS -- Number of terminals. */
+/* YYNTOKENS -- Number of terminals.  */

 #define YYNTOKENS  ]b4_tokens_number[
 #define YYNTOKENS  ]b4_tokens_number[

-/* YYNNTS -- Number of nonterminals. */
+/* YYNNTS -- Number of nonterminals.  */

 #define YYNNTS  ]b4_nterms_number[
 #define YYNNTS  ]b4_nterms_number[

-/* YYNRULES -- Number of rules. */
+/* YYNRULES -- Number of rules.  */

 #define YYNRULES  ]b4_rules_number[
 #define YYNRULES  ]b4_rules_number[

-/* YYNRULES -- Number of states. */
+/* YYNRULES -- Number of states.  */

 #define YYNSTATES  ]b4_states_number[
 #define YYNSTATES  ]b4_states_number[

-/* YYMAXRHS -- Maximum number of symbols on right-hand side of rule. */
+/* YYMAXRHS -- Maximum number of symbols on right-hand side of rule.  */

 #define YYMAXRHS ]b4_r2_max[
 /* YYMAXLEFT -- Maximum number of symbols to the left of a handle
 #define YYMAXRHS ]b4_r2_max[
 /* YYMAXLEFT -- Maximum number of symbols to the left of a handle

-   accessed by $0, $-1, etc., in any rule. */
+   accessed by $0, $-1, etc., in any rule.  */

 #define YYMAXLEFT ]b4_max_left_semantic_context[
 
 /* YYTRANSLATE(X) -- Bison symbol number corresponding to X.  */
 #define YYMAXLEFT ]b4_max_left_semantic_context[
 
 /* YYTRANSLATE(X) -- Bison symbol number corresponding to X.  */


@@ -325,7 +360,7 @@ static const ]b4_int_type_for([b4_prhs])[ yyprhs[] =
   ]b4_prhs[
 };
 
   ]b4_prhs[
 };
 

-/* YYRHS -- A `-1'-separated list of the rules' RHS. */
+/* YYRHS -- A `-1'-separated list of the rules' RHS.  */

 static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =
 {
   ]b4_rhs[
 static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =
 {
   ]b4_rhs[


@@ -340,7 +375,7 @@ static const ]b4_int_type_for([b4_rline])[ yyrline[] =
 
 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
 
 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.

-   First, the terminals, then, starting at YYNTOKENS, nonterminals. */
+   First, the terminals, then, starting at YYNTOKENS, nonterminals.  */

 static const char *const yytname[] =
 {
   ]b4_tname[
 static const char *const yytname[] =
 {
   ]b4_tname[


@@ -359,13 +394,13 @@ 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). */
+/* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none).  */

 static const ]b4_int_type_for([b4_dprec])[ yydprec[] =
 {
   ]b4_dprec[
 };
 
 static const ]b4_int_type_for([b4_dprec])[ yydprec[] =
 {
   ]b4_dprec[
 };
 

-/* YYMERGER[RULE-NUM] -- Index of merging function for rule #RULE-NUM. */
+/* YYMERGER[RULE-NUM] -- Index of merging function for rule #RULE-NUM.  */

 static const ]b4_int_type_for([b4_merger])[ yymerger[] =
 {
   ]b4_merger[
 static const ]b4_int_type_for([b4_merger])[ yymerger[] =
 {
   ]b4_merger[


@@ -379,7 +414,7 @@ static const ]b4_int_type_for([b4_defact])[ yydefact[] =
   ]b4_defact[
 };
 
   ]b4_defact[
 };
 

-/* YYPDEFGOTO[NTERM-NUM]. */
+/* YYPDEFGOTO[NTERM-NUM].  */

 static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =
 {
   ]b4_defgoto[
 static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =
 {
   ]b4_defgoto[


@@ -456,7 +491,7 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] =
 #ifndef YYLLOC_DEFAULT
 # define YYLLOC_DEFAULT(Current, Rhs, N)                               \
     do                                                                 \
 #ifndef YYLLOC_DEFAULT
 # define YYLLOC_DEFAULT(Current, Rhs, N)                               \
     do                                                                 \

-      if (N)                                                           \
+      if (YYID (N))                                                    \

        {                                                               \
          (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;        \
          (Current).first_column = YYRHSLOC (Rhs, 1).first_column;      \
        {                                                               \
          (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;        \
          (Current).first_column = YYRHSLOC (Rhs, 1).first_column;      \


@@ -470,7 +505,7 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] =
          (Current).first_column = (Current).last_column =              \
            YYRHSLOC (Rhs, 0).last_column;                              \
        }                                                               \
          (Current).first_column = (Current).last_column =              \
            YYRHSLOC (Rhs, 0).last_column;                              \
        }                                                               \

-    while (0)
+    while (YYID (0))

 
 /* YY_LOCATION_PRINT -- Print the location on the stream.
    This macro was not mandated originally: define only if we know
 
 /* YY_LOCATION_PRINT -- Print the location on the stream.
    This macro was not mandated originally: define only if we know


@@ -478,8 +513,8 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] =
 
 # define YY_LOCATION_PRINT(File, Loc)                  \
     fprintf (File, "%d.%d-%d.%d",                      \
 
 # define YY_LOCATION_PRINT(File, Loc)                  \
     fprintf (File, "%d.%d-%d.%d",                      \

-             (Loc).first_line, (Loc).first_column,     \
-             (Loc).last_line,  (Loc).last_column)
+            (Loc).first_line, (Loc).first_column,      \
+            (Loc).last_line,  (Loc).last_column)

 #endif
 ]],[
 #ifndef YYLLOC_DEFAULT
 #endif
 ]],[
 #ifndef YYLLOC_DEFAULT


@@ -498,9 +533,18 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] =
 ]b4_pure_if(
 [
 #undef yynerrs
 ]b4_pure_if(
 [
 #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;


@@ -515,43 +559,32 @@ typedef enum { yyok, yyaccept, yyabort, yyerr } YYRESULTTAG;
 
 #define YYCHK(YYE)                                                          \
    do { YYRESULTTAG yyflag = YYE; if (yyflag != yyok) return yyflag; }      \
 
 #define YYCHK(YYE)                                                          \
    do { YYRESULTTAG yyflag = YYE; if (yyflag != yyok) return yyflag; }      \

-   while (0)
+   while (YYID (0))

 
 #if YYDEBUG
 
 
 #if YYDEBUG
 

-# ifdef YYFPRINTF
-#  define YYFPUTC(Char, Stream) YYFPRINTF (Stream, "%c", Char)
-#  define YYFPUTS(Char, Stream) YYFPRINTF (Stream, "%s", String)
-# else
+# ifndef YYFPRINTF

 #  define YYFPRINTF fprintf
 #  define YYFPRINTF fprintf

-#  define YYFPUTC fputc
-#  define YYFPUTS fputs

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

-} while (0)
+} while (YYID (0))

 
 

-# define YYDPUTS(String, Stream)               \
-do {                                           \
-  if (yydebug)                                 \
-    YYFPUTS (String, Stream);                  \
-} while (0)
-
-]b4_yysymprint_generate([b4_c_ansi_function_def])[
-
-# define YY_SYMBOL_PRINT(Title, Type, Value, Location)         \
-do {                                                           \
-  if (yydebug)                                                 \
-    {                                                          \
-      YYFPRINTF (stderr, "%s ", Title);                                \
-      yysymprint (stderr,                                      \
-                  Type, Value]b4_location_if([, Location])[);  \
-      YYFPUTC ('\n', stderr);                                  \
-    }                                                          \
-} while (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.  */
 
 /* Nonzero means print parse trace.  It is left uninitialized so that
    multiple parsers can coexist.  */


@@ -559,7 +592,6 @@ int yydebug;
 
 #else /* !YYDEBUG */
 
 
 #else /* !YYDEBUG */
 

-# define YYDPUTS(String, File)

 # define YYDPRINTF(Args)
 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
 
 # define YYDPRINTF(Args)
 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
 


@@ -585,23 +617,38 @@ int yydebug;
    allocation.  This is to allow allocation and initialization
    to be completed by functions that call yyexpandGLRStack before the
    stack is expanded, thus insuring that all necessary pointers get
    allocation.  This is to allow allocation and initialization
    to be completed by functions that call yyexpandGLRStack before the
    stack is expanded, thus insuring that all necessary pointers get

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

 #define YYHEADROOM 2
 
 #ifndef YYSTACKEXPANDABLE
 #define YYHEADROOM 2
 
 #ifndef YYSTACKEXPANDABLE

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

 #if YYERROR_VERBOSE
 
 # ifndef yystpcpy
 #if YYERROR_VERBOSE
 
 # ifndef yystpcpy

-#  if defined (__GLIBC__) && defined (_STRING_H) && defined (_GNU_SOURCE)
+#  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
 #   define yystpcpy stpcpy
 #  else
 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in


@@ -683,18 +730,18 @@ typedef short int yySymbol;
 typedef short int yyItemNum;
 
 typedef struct yyGLRState yyGLRState;
 typedef short int yyItemNum;
 
 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 {

-  /** Type tag: always true. */
+  /** Type tag: always true.  */

   yybool yyisState;
   yybool yyisState;

-  /** Type tag for yysemantics. If true, yysval applies, otherwise
-   *  yyfirstVal applies. */
+  /** Type tag for yysemantics.  If true, yysval applies, otherwise
+   *  yyfirstVal applies.  */

   yybool yyresolved;
   yybool yyresolved;

-  /** Number of corresponding LALR(1) machine state. */
+  /** Number of corresponding LALR(1) machine state.  */

   yyStateNum yylrState;
   /** Preceding state in this stack */
   yyGLRState* yypred;
   yyStateNum yylrState;
   /** Preceding state in this stack */
   yyGLRState* yypred;


@@ -703,34 +750,43 @@ struct yyGLRState {
   union {
     /** First in a chain of alternative reductions producing the
      *  non-terminal corresponding to this state, threaded through
   union {
     /** First in a chain of alternative reductions producing the
      *  non-terminal corresponding to this state, threaded through

-     *  yynext. */
+     *  yynext.  */

     yySemanticOption* yyfirstVal;
     yySemanticOption* yyfirstVal;

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

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

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

-  /** Type tag: always false. */
+  /** Type tag: always false.  */

   yybool yyisState;
   /** Rule number for this reduction */
   yyRuleNum yyrule;
   yybool yyisState;
   /** Rule number for this reduction */
   yyRuleNum yyrule;

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

   yyGLRState* yystate;
   yyGLRState* yystate;

-  /** Next sibling in chain of options. To facilitate merging,
-   *  options are chained in decreasing order by address. */
+  /** 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. */
+/** 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;
 union yyGLRStackItem {
   yyGLRState yystate;
   yySemanticOption yyoption;


@@ -744,8 +800,9 @@ struct yyGLRStack {
 [
   int yyerrcnt;
   int yyrawchar;
 [
   int yyerrcnt;
   int yyrawchar;

+  YYSTYPE yyval;
+  YYLTYPE yyloc;

 ])[
 ])[

-  yySymbol* yytokenp;

   YYJMP_BUF yyexception_buffer;
   yyGLRStackItem* yyitems;
   yyGLRStackItem* yynextFree;
   YYJMP_BUF yyexception_buffer;
   yyGLRStackItem* yyitems;
   yyGLRStackItem* yynextFree;


@@ -755,24 +812,26 @@ struct yyGLRStack {
   yyGLRStateSet yytops;
 };
 
   yyGLRStateSet yytops;
 };
 

-static void yyexpandGLRStack (yyGLRStack* yystack);
+#if YYSTACKEXPANDABLE
+static void yyexpandGLRStack (yyGLRStack* yystackp);
+#endif

 
 

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

   __attribute__ ((__noreturn__));
 static void
   __attribute__ ((__noreturn__));
 static void

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

 {
   if (yymsg != NULL)
     yyerror (]b4_yyerror_args[yymsg);
 {
   if (yymsg != NULL)
     yyerror (]b4_yyerror_args[yymsg);

-  YYLONGJMP (yystack->yyexception_buffer, 1);
+  YYLONGJMP (yystackp->yyexception_buffer, 1);

 }
 
 }
 

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

   __attribute__ ((__noreturn__));
 static void
   __attribute__ ((__noreturn__));
 static void

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

 {
 {

-  YYLONGJMP (yystack->yyexception_buffer, 2);
+  YYLONGJMP (yystackp->yyexception_buffer, 2);

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


@@ -789,8 +848,7 @@ yytokenName (yySymbol yytoken)
 
 /** Fill in YYVSP[YYLOW1 .. YYLOW0-1] from the chain of states starting
  *  at YYVSP[YYLOW0].yystate.yypred.  Leaves YYVSP[YYLOW1].yystate.yypred
 
 /** 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. Assumes
- *  YYLOW1 < YYLOW0.  */
+ *  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)
 static void yyfillin (yyGLRStackItem *, int, int) __attribute__ ((__unused__));
 static void
 yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)


@@ -809,8 +867,8 @@ yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)
 }
 
 /* Do nothing if YYNORMAL or if *YYLOW <= YYLOW1.  Otherwise, fill in
 }
 
 /* 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.  */
+ * 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
 static inline int yyfill (yyGLRStackItem *, int *, int, yybool)
      __attribute__ ((__unused__));
 static inline int


@@ -827,21 +885,21 @@ yyfill (yyGLRStackItem *yyvsp, int *yylow, int yylow1, yybool yynormal)
 /** Perform user action for rule number YYN, with RHS length YYRHSLEN,
  *  and top stack item YYVSP.  YYLVALP points to place to put semantic
  *  value ($$), and yylocp points to place for location information
 /** Perform user action for rule number YYN, with RHS length YYRHSLEN,
  *  and top stack item YYVSP.  YYLVALP points to place to put semantic
  *  value ($$), and yylocp points to place for location information

- *  (@@$). Returns yyok for normal return, yyaccept for YYACCEPT,
- *  yyerr for YYERROR, yyabort for YYABORT. */
-static YYRESULTTAG
+ *  (@@$).  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),
 yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
              YYSTYPE* yyvalp,
              YYLTYPE* YYOPTIONAL_LOC (yylocp),

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

 {
   yybool yynormal __attribute__ ((__unused__)) =
 {
   yybool yynormal __attribute__ ((__unused__)) =

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

   int yylow;
   int yylow;

-
-# undef yyerrok
-# define yyerrok (yystack->yyerrState = 0)
+]b4_parse_param_use[]dnl
+[# undef yyerrok
+# define yyerrok (yystackp->yyerrState = 0)

 # undef YYACCEPT
 # define YYACCEPT return yyaccept
 # undef YYABORT
 # undef YYACCEPT
 # define YYACCEPT return yyaccept
 # undef YYABORT


@@ -849,9 +907,9 @@ yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
 # undef YYERROR
 # define YYERROR return yyerrok, yyerr
 # undef YYRECOVERING
 # undef YYERROR
 # define YYERROR return yyerrok, yyerr
 # 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
 # undef YYFILL
 # define YYFILL(N) yyfill (yyvsp, &yylow, N, yynormal)
 # undef YYBACKUP


@@ -864,12 +922,14 @@ yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
     *yyvalp = yyval_default;
   else
     *yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval;
     *yyvalp = yyval_default;
   else
     *yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval;

-  YYLLOC_DEFAULT (*yylocp, yyvsp - yyrhslen, yyrhslen);
-]b4_location_if([[  yystack->yyerror_range[1].yystate.yyloc = *yylocp;
-]])
+  YYLLOC_DEFAULT ((*yylocp), (yyvsp - yyrhslen), yyrhslen);
+]b4_location_if([[  yystackp->yyerror_range[1].yystate.yyloc = *yylocp;
+]])[

   switch (yyn)
     {
   switch (yyn)
     {

-      b4_actions
+      ]b4_actions
+/* Line __line__ of glr.c.  */
+b4_syncline([@oline@], [@ofile@])[

       default: break;
     }
 
       default: break;
     }
 


@@ -881,25 +941,22 @@ yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
 # undef YYBACKUP
 # undef yyclearin
 # undef YYRECOVERING
 # undef YYBACKUP
 # undef yyclearin
 # undef YYRECOVERING

-/* Line __line__ of glr.c.  */
-b4_syncline([@oline@], [@ofile@])

 }
 \f
 
 }
 \f
 

-static void
+/*ARGSUSED*/ static void

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

-  /* Suppress unused-variable warnings.  */
-  yy0 = yy0;
-  yy1 = yy1;
+  YYUSE (yy0);
+  YYUSE (yy1);

 
   switch (yyn)
     {
 
   switch (yyn)
     {

-      b4_mergers
+      ]b4_mergers[

       default: break;
     }
 }
       default: break;
     }
 }

-[
+

                              /* Bison grammar-table manipulation.  */
 
 ]b4_yydestruct_generate([b4_c_ansi_function_def])[
                              /* Bison grammar-table manipulation.  */
 
 ]b4_yydestruct_generate([b4_c_ansi_function_def])[


@@ -912,37 +969,40 @@ yyrhsLength (yyRuleNum yyrule)
 }
 
 static void
 }
 
 static void

-yydestroyGLRState (char const *yymsg, yyGLRState *yys)
+yydestroyGLRState (char const *yymsg, yyGLRState *yys]b4_user_formals[)

 {
   if (yys->yyresolved)
     yydestruct (yymsg, yystos[yys->yylrState],
 {
   if (yys->yyresolved)
     yydestruct (yymsg, yystos[yys->yylrState],

-               &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[);
+               &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[]b4_user_args[);

   else
     {
 #if YYDEBUG
       if (yydebug)
        {
   else
     {
 #if YYDEBUG
       if (yydebug)
        {

-         YYFPRINTF (stderr, "%s unresolved ", yymsg);
-         yysymprint (stderr, yystos[yys->yylrState],
-                     &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[);
-         YYFPUTC ('\n', stderr);
+         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)
        }
 #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);
-        }
+       {
+         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. */
+/** Left-hand-side symbol for rule #RULE.  */

 static inline yySymbol
 yylhsNonterm (yyRuleNum yyrule)
 {
 static inline yySymbol
 yylhsNonterm (yyRuleNum yyrule)
 {


@@ -950,19 +1010,19 @@ yylhsNonterm (yyRuleNum yyrule)
 }
 
 #define yyis_pact_ninf(yystate) \
 }
 
 #define yyis_pact_ninf(yystate) \

-  ]m4_if(m4_eval(b4_pact_ninf < b4_pact_min), 1,
-        0,
-        ((yystate) == YYPACT_NINF))[
+  ]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). */
+ *  of token).  */

 static inline yybool
 yyisDefaultedState (yyStateNum yystate)
 {
   return yyis_pact_ninf (yypact[yystate]);
 }
 
 static inline yybool
 yyisDefaultedState (yyStateNum yystate)
 {
   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)
 {
 static inline yyRuleNum
 yydefaultAction (yyStateNum yystate)
 {


@@ -970,9 +1030,9 @@ yydefaultAction (yyStateNum yystate)
 }
 
 #define yyis_table_ninf(yytable_value) \
 }
 
 #define yyis_table_ninf(yytable_value) \

-  ]m4_if(m4_eval(b4_table_ninf < b4_table_min), 1,
-        0,
-        ((yytable_value) == YYTABLE_NINF))[
+  ]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
 
 /** Set *YYACTION to the action to take in YYSTATE on seeing YYTOKEN.
  *  Result R means


@@ -984,7 +1044,7 @@ yydefaultAction (yyStateNum yystate)
  */
 static inline void
 yygetLRActions (yyStateNum yystate, int yytoken,
  */
 static inline void
 yygetLRActions (yyStateNum yystate, int yytoken,

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

 {
   int yyindex = yypact[yystate] + yytoken;
   if (yyindex < 0 || YYLAST < yyindex || yycheck[yyindex] != yytoken)
 {
   int yyindex = yypact[yystate] + yytoken;
   if (yyindex < 0 || YYLAST < yyindex || yycheck[yyindex] != yytoken)


@@ -1029,26 +1089,49 @@ yyisErrorAction (int yyaction)
 
                                /* GLRStates */
 
 
                                /* GLRStates */
 

+/** 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)
+{
+  yyGLRStackItem* yynewItem = yystackp->yynextFree;
+  yystackp->yyspaceLeft -= 1;
+  yystackp->yynextFree += 1;
+  yynewItem->yystate.yyisState = yyisState;
+  return yynewItem;
+}
+
+/** 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
 static void

-yyaddDeferredAction (yyGLRStack* yystack, yyGLRState* yystate,
+yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate,

                     yyGLRState* rhs, yyRuleNum yyrule)
 {
                     yyGLRState* rhs, yyRuleNum yyrule)
 {

-  yySemanticOption* yynewItem;
-  yynewItem = &yystack->yynextFree->yyoption;
-  yystack->yyspaceLeft -= 1;
-  yystack->yynextFree += 1;
-  yynewItem->yyisState = yyfalse;
-  yynewItem->yystate = rhs;
-  yynewItem->yyrule = yyrule;
-  yynewItem->yynext = yystate->yysemantics.yyfirstVal;
-  yystate->yysemantics.yyfirstVal = yynewItem;
-  if (yystack->yyspaceLeft < YYHEADROOM)
-    yyexpandGLRStack (yystack);
+  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. */
+/** Initialize SET to a singleton set containing an empty stack.  */

 static yybool
 yyinitStateSet (yyGLRStateSet* yyset)
 {
 static yybool
 yyinitStateSet (yyGLRStateSet* yyset)
 {


@@ -1058,58 +1141,67 @@ yyinitStateSet (yyGLRStateSet* yyset)
   if (! yyset->yystates)
     return yyfalse;
   yyset->yystates[0] = NULL;
   if (! yyset->yystates)
     return yyfalse;
   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)
 {
   YYFREE (yyset->yystates);
   return yytrue;
 }
 
 static void yyfreeStateSet (yyGLRStateSet* yyset)
 {
   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. */
+ *  capacity for all stacks of SIZE.  */

 static yybool
 static yybool

-yyinitGLRStack (yyGLRStack* yystack, size_t yysize)
+yyinitGLRStack (yyGLRStack* yystackp, size_t yysize)

 {
 {

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

   yynerrs = 0;
   yynerrs = 0;

-  yystack->yyspaceLeft = yysize;
-  yystack->yyitems =
-    (yyGLRStackItem*) YYMALLOC (yysize * sizeof yystack->yynextFree[0]);
-  if (!yystack->yyitems)
+  yystackp->yyspaceLeft = yysize;
+  yystackp->yyitems =
+    (yyGLRStackItem*) YYMALLOC (yysize * sizeof yystackp->yynextFree[0]);
+  if (!yystackp->yyitems)

     return yyfalse;
     return yyfalse;

-  yystack->yynextFree = yystack->yyitems;
-  yystack->yysplitPoint = NULL;
-  yystack->yylastDeleted = NULL;
-  return yyinitStateSet (&yystack->yytops);
+  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

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

-  yysize = yystack->yynextFree - yystack->yyitems;
-  if (YYMAXDEPTH <= yysize)
-    yyMemoryExhausted (yystack);
+  yysize = yystackp->yynextFree - yystackp->yyitems;
+  if (YYMAXDEPTH - YYHEADROOM < yysize)
+    yyMemoryExhausted (yystackp);

   yynewSize = 2*yysize;
   if (YYMAXDEPTH < yynewSize)
     yynewSize = YYMAXDEPTH;
   yynewItems = (yyGLRStackItem*) YYMALLOC (yynewSize * sizeof yynewItems[0]);
   if (! yynewItems)
   yynewSize = 2*yysize;
   if (YYMAXDEPTH < yynewSize)
     yynewSize = YYMAXDEPTH;
   yynewItems = (yyGLRStackItem*) YYMALLOC (yynewSize * sizeof yynewItems[0]);
   if (! yynewItems)

-    yyMemoryExhausted (yystack);
-  for (yyp0 = yystack->yyitems, yyp1 = yynewItems, yyn = yysize;
+    yyMemoryExhausted (yystackp);
+  for (yyp0 = yystackp->yyitems, yyp1 = yynewItems, yyn = yysize;

        0 < yyn;
        yyn -= 1, yyp0 += 1, yyp1 += 1)
     {
        0 < yyn;
        yyn -= 1, yyp0 += 1, yyp1 += 1)
     {


@@ -1135,83 +1227,87 @@ 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, yynewItems,
-                                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, yynewItems,
-                yystack->yytops.yystates[yyn], yystate);
-  YYFREE (yystack->yyitems);
-  yystack->yyitems = yynewItems;
-  yystack->yynextFree = yynewItems + yysize;
-  yystack->yyspaceLeft = yynewSize - yysize;
-
-#else
-  yyMemoryExhausted (yystack);
-#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)

 {
 {

-  YYFREE (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, size_t 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;
-  YYDPUTS ("Restoring last deleted stack as stack #0.\n", stderr);
-  yystack->yylastDeleted = NULL;
+  yystackp->yytops.yystates[0] = yystackp->yylastDeleted;
+  yystackp->yytops.yysize = 1;
+  YYDPRINTF ((stderr, "Restoring last deleted stack as stack #0.\n"));
+  yystackp->yylastDeleted = NULL;

 }
 
 static inline void
 }
 
 static inline void

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

 {
   size_t yyi, yyj;
   yyi = yyj = 0;
 {
   size_t yyi, yyj;
   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 (yyi == yyj)
            {
        {
          if (yyi == yyj)
            {

-             YYDPUTS ("Removing dead stacks.\n", stderr);
+             YYDPRINTF ((stderr, "Removing dead stacks.\n"));

            }
            }

-         yystack->yytops.yysize -= 1;
+         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)
            {
              YYDPRINTF ((stderr, "Rename stack %lu -> %lu.\n",
          if (yyj != yyi)
            {
              YYDPRINTF ((stderr, "Rename stack %lu -> %lu.\n",


@@ -1224,117 +1320,133 @@ 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, size_t yyk, yyStateNum yylrState,
+yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,

            size_t yyposn,
            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);
+           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 stack #K of YYSTACK, to a new state corresponding to LR
  *  state YYLRSTATE, at input position YYPOSN, with the (unresolved)
 }
 
 /** 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. */
+ *  semantic value of YYRHS under the action for YYRULE.  */

 static inline void
 static inline void

-yyglrShiftDefer (yyGLRStack* yystack, size_t yyk, yyStateNum yylrState,
+yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,

                 size_t yyposn, yyGLRState* rhs, yyRuleNum yyrule)
 {
                 size_t yyposn, yyGLRState* rhs, 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, rhs, 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. */
+ *  for userAction.  */

 static inline YYRESULTTAG
 static inline YYRESULTTAG

-yydoAction (yyGLRStack* yystack, size_t yyk, yyRuleNum yyrule,
+yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,

            YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
 {
   int yynrhs = yyrhsLength (yyrule);
 
            YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
 {
   int yynrhs = yyrhsLength (yyrule);
 

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

     {
     {

-      /* Standard special case: single stack. */
-      yyGLRStackItem* rhs = (yyGLRStackItem*) yystack->yytops.yystates[yyk];
+      /* Standard special case: single stack.  */
+      yyGLRStackItem* rhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];

       YYASSERT (yyk == 0);
       YYASSERT (yyk == 0);

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

       return yyuserAction (yyrule, yynrhs, rhs,
       return yyuserAction (yyrule, yynrhs, rhs,

-                          yyvalp, yylocp, yystack]b4_user_args[);
+                          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;
       yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
       yys = yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred
       int yyi;
       yyGLRState* yys;
       yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
       yys = yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred

-       = yystack->yytops.yystates[yyk];
+       = yystackp->yytops.yystates[yyk];]b4_location_if([[
+      if (yynrhs == 0)
+       /* Set default location.  */
+       yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yys->yyloc;]])[

       for (yyi = 0; yyi < yynrhs; yyi += 1)
        {
          yys = yys->yypred;
          YYASSERT (yys);
        }
       for (yyi = 0; yyi < yynrhs; yyi += 1)
        {
          yys = yys->yypred;
          YYASSERT (yys);
        }

-      yyupdateSplit (yystack, yys);
-      yystack->yytops.yystates[yyk] = yys;
+      yyupdateSplit (yystackp, yys);
+      yystackp->yytops.yystates[yyk] = yys;

       return yyuserAction (yyrule, yynrhs, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
       return yyuserAction (yyrule, yynrhs, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,

-                          yyvalp, yylocp, yystack]b4_user_args[);
+                          yyvalp, yylocp, yystackp]b4_user_args[);

     }
 }
 
 #if !YYDEBUG
     }
 }
 
 #if !YYDEBUG

-# define YY_REDUCE_PRINT(K, Rule)
+# define YY_REDUCE_PRINT(Args)

 #else
 #else

-# define YY_REDUCE_PRINT(K, Rule)      \
+# define YY_REDUCE_PRINT(Args)         \

 do {                                   \
   if (yydebug)                         \
 do {                                   \
   if (yydebug)                         \

-    yy_reduce_print (K, Rule);         \
-} while (0)
+    yy_reduce_print Args;              \
+} while (YYID (0))

 
 /*----------------------------------------------------------.
 | Report that the RULE is going to be reduced on stack #K.  |
 `----------------------------------------------------------*/
 
 
 /*----------------------------------------------------------.
 | Report that the RULE is going to be reduced on stack #K.  |
 `----------------------------------------------------------*/
 

-static inline void
-yy_reduce_print (size_t yyk, yyRuleNum yyrule)
+/*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;
   int yyi;

-  YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu), ",
+  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]);
             (unsigned long int) yyk, yyrule - 1,
             (unsigned long int) yyrline[yyrule]);

-  /* Print the symbols being reduced, and their result.  */
-  for (yyi = yyprhs[yyrule]; 0 <= yyrhs[yyi]; yyi++)
-    YYFPRINTF (stderr, "%s ", yytokenName (yyrhs[yyi]));
-  YYFPRINTF (stderr, "-> %s\n", yytokenName (yyr1[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
 
 }
 #endif
 


@@ -1346,56 +1458,58 @@ yy_reduce_print (size_t 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, size_t yyk, yyRuleNum yyrule,
-             yybool yyforceEval]b4_user_formals[)
+yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
+            yybool yyforceEval]b4_user_formals[)

 {
 {

-  size_t 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;
 

-      YY_REDUCE_PRINT (yyk, yyrule);
-      YYCHK (yydoAction (yystack, yyk, yyrule, &yysval, &yyloc]b4_user_args[));
-      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);
+                 yyposn, &yysval, &yyloc);

     }
   else
     {
       size_t yyi;
       int yyn;
     }
   else
     {
       size_t yyi;
       int yyn;

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

       yyStateNum yynewLRState;
 
       yyStateNum yynewLRState;
 

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

           0 < yyn; yyn -= 1)
        {
          yys = yys->yypred;
          YYASSERT (yys);
        }
           0 < yyn; yyn -= 1)
        {
          yys = yys->yypred;
          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 %lu by rule #%d; action deferred. Now in state %d.\n",
+                 "Reduced stack %lu by rule #%d; action deferred.  Now in state %d.\n",

                  (unsigned long int) yyk, yyrule - 1, yynewLRState));
                  (unsigned long int) yyk, yyrule - 1, yynewLRState));

-      for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1)
-       if (yyi != yyk && yystack->yytops.yystates[yyi] != NULL)
+      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);
+                   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));
                    YYDPRINTF ((stderr, "Merging stack %lu into stack %lu.\n",
                                (unsigned long int) yyk,
                                (unsigned long int) yyi));


@@ -1404,41 +1518,59 @@ yyglrReduce (yyGLRStack* yystack, size_t yyk, yyRuleNum yyrule,
                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 yyok;
 }
 
 static size_t
     }
   return yyok;
 }
 
 static size_t

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

 {
 {

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

     {
       YYASSERT (yyk == 0);
     {
       YYASSERT (yyk == 0);

-      yystack->yysplitPoint = yystack->yytops.yystates[yyk];
+      yystackp->yysplitPoint = yystackp->yytops.yystates[yyk];

     }
     }

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

     {
       yyGLRState** yynewStates;
     {
       yyGLRState** yynewStates;

-      if (! ((yystack->yytops.yycapacity
-             <= (YYSIZEMAX / (2 * sizeof yynewStates[0])))
-            && (yynewStates =
-                (yyGLRState**) YYREALLOC (yystack->yytops.yystates,
-                                          ((yystack->yytops.yycapacity *= 2)
-                                           * sizeof yynewStates[0])))))
-       yyMemoryExhausted (yystack);
-      yystack->yytops.yystates = 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. */
+ *  that produce the same terminal symbols.  */

 static yybool
 yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
 {
 static yybool
 yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
 {


@@ -1459,7 +1591,7 @@ yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
 }
 
 /** Assuming identicalOptions (Y0,Y1), destructively merge the
 }
 
 /** Assuming identicalOptions (Y0,Y1), destructively merge the

- *  alternative semantic values for the RHS-symbols of Y1 and Y0. */
+ *  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)
 {


@@ -1488,7 +1620,7 @@ yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
          yySemanticOption* yyz1;
          yyz0p = &yys0->yysemantics.yyfirstVal;
          yyz1 = yys1->yysemantics.yyfirstVal;
          yySemanticOption* yyz1;
          yyz0p = &yys0->yysemantics.yyfirstVal;
          yyz1 = yys1->yysemantics.yyfirstVal;

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

            {
              if (yyz1 == *yyz0p || yyz1 == NULL)
                break;
            {
              if (yyz1 == *yyz0p || yyz1 == NULL)
                break;


@@ -1513,7 +1645,7 @@ yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
 
 /** 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
 yypreference (yySemanticOption* y0, yySemanticOption* y1)
 {
 static int
 yypreference (yySemanticOption* y0, yySemanticOption* y1)
 {


@@ -1536,46 +1668,71 @@ yypreference (yySemanticOption* y0, yySemanticOption* y1)
   return 0;
 }
 
   return 0;
 }
 

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

 {
 {

-  YYRESULTTAG yyflag;

   if (0 < yyn)
     {
       YYASSERT (yys->yypred);
   if (0 < yyn)
     {
       YYASSERT (yys->yypred);

-      yyflag = yyresolveStates (yys->yypred, yyn-1, yystack]b4_user_args[);
-      if (yyflag != yyok)
-       return yyflag;
+      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
-                                 ]b4_user_args[);
-         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]b4_user_formals[)
+yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystackp,
+                YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)

 {
   yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
   int yynrhs;
 {
   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]b4_user_args[));
-  yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred = yyopt->yystate;
-  return yyuserAction (yyopt->yyrule, yynrhs,
-                      yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
-                      yyvalp, yylocp, yystack]b4_user_args[);
+  yyflag = yyresolveStates (yyopt->yystate, yynrhs, yystackp]b4_user_args[);
+  if (yyflag != yyok)
+    {
+      yyGLRState *yys;
+      for (yys = yyopt->yystate; yynrhs > 0; yys = yys->yypred, yynrhs -= 1)
+       yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
+      return yyflag;
+    }
+
+  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


@@ -1626,37 +1783,94 @@ yyreportTree (yySemanticOption* yyx, int yyindent)
 }
 #endif
 
 }
 #endif
 

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

 {
 {

-  /* Suppress unused-variable warnings.  */
-  yyx0 = yyx0;
-  yyx1 = yyx1;
+  YYUSE (yyx0);
+  YYUSE (yyx1);

 
 #if YYDEBUG
 
 #if YYDEBUG

-  YYFPUTS ("Ambiguity detected.\nOption 1,\n", stderr);
+  YYFPRINTF (stderr, "Ambiguity detected.\n");
+  YYFPRINTF (stderr, "Option 1,\n");

   yyreportTree (yyx0, 2);
   yyreportTree (yyx0, 2);

-  YYFPUTS ("\nOption 2,\n", stderr);
+  YYFPRINTF (stderr, "\nOption 2,\n");

   yyreportTree (yyx1, 2);
   yyreportTree (yyx1, 2);

-  YYFPUTC ('\n', stderr);
+  YYFPRINTF (stderr, "\n");

 #endif
 #endif

-  yyFail (yystack][]b4_pure_args[, YY_("syntax is ambiguous"));
+
+  yyerror (]b4_yyerror_args[YY_("syntax is ambiguous"));
+  return yyabort;

 }
 
 }
 

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

 {
 {

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

   yySemanticOption* yybest;
   yySemanticOption** yypp;
   yybool yymerge;
   yySemanticOption* yybest;
   yySemanticOption** yypp;
   yybool yymerge;

+  YYSTYPE yysval;
+  YYRESULTTAG yyflag;
+  YYLTYPE *yylocp = &yys->yyloc;

 
   yybest = yyoptionList;
   yymerge = yyfalse;
 
   yybest = yyoptionList;
   yymerge = yyfalse;


@@ -1674,7 +1888,8 @@ yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystack,
          switch (yypreference (yybest, yyp))
            {
            case 0:
          switch (yypreference (yybest, yyp))
            {
            case 0:

-             yyreportAmbiguity (yybest, yyp, yystack]b4_pure_args[);
+             yyresolveLocations (yys, 1, yystackp]b4_user_args[);
+             return yyreportAmbiguity (yybest, yyp]b4_pure_args[);

              break;
            case 1:
              yymerge = yytrue;
              break;
            case 1:
              yymerge = yytrue;


@@ -1687,7 +1902,7 @@ yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystack,
              break;
            default:
              /* This cannot happen so it is not worth a YYASSERT (yyfalse),
              break;
            default:
              /* This cannot happen so it is not worth a YYASSERT (yyfalse),

-                but some compilers complain if the default case is
+                but some compilers complain if the default case is

                 omitted.  */
              break;
            }
                 omitted.  */
              break;
            }


@@ -1699,84 +1914,100 @@ yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystack,
     {
       yySemanticOption* yyp;
       int yyprec = yydprec[yybest->yyrule];
     {
       yySemanticOption* yyp;
       int yyprec = yydprec[yybest->yyrule];

-      YYCHK (yyresolveAction (yybest, yystack, yyvalp, yylocp]b4_user_args[));
-      for (yyp = yybest->yynext; yyp != NULL; yyp = yyp->yynext)
-       {
-         if (yyprec == yydprec[yyp->yyrule])
-           {
-             YYSTYPE yyval1;
-             YYLTYPE yydummy;
-             YYCHK (yyresolveAction (yyp, yystack, &yyval1, &yydummy]b4_user_args[));
-             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]b4_user_args[);
+    yys->yysemantics.yyfirstVal = NULL;
+  return yyflag;

 }
 
 static YYRESULTTAG
 }
 
 static YYRESULTTAG

-yyresolveStack (yyGLRStack* yystack]b4_user_formals[)
+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)
        continue;
           yys = yys->yypred, yyn += 1)
        continue;

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

                             ]b4_user_args[));
     }
   return yyok;
 }
 
 static void
                             ]b4_user_args[));
     }
   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, size_t yyk,
-                  size_t yyposn, YYSTYPE* yylvalp, YYLTYPE* yyllocp
-                 ]b4_pure_formals[)
+yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
+                  size_t yyposn]b4_pure_formals[)

 {
   int yyaction;
   const short int* yyconflicts;
   yyRuleNum yyrule;
 {
   int yyaction;
   const short int* yyconflicts;
   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));
 
       YYDPRINTF ((stderr, "Stack %lu Entering state %d\n",
                  (unsigned long int) yyk, yystate));
 


@@ -1789,77 +2020,68 @@ yyprocessOneStack (yyGLRStack* yystack, size_t yyk,
            {
              YYDPRINTF ((stderr, "Stack %lu dies.\n",
                          (unsigned long int) yyk));
            {
              YYDPRINTF ((stderr, "Stack %lu dies.\n",
                          (unsigned long int) yyk));

-             yymarkStackDeleted (yystack, yyk);
+             yymarkStackDeleted (yystackp, yyk);

              return yyok;
            }
              return yyok;
            }

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

        }
       else
        {
        }
       else
        {

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

            {
            {

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

              yychar = YYLEX;
              yychar = YYLEX;

-             *yytokenp = YYTRANSLATE (yychar);
-             YY_SYMBOL_PRINT ("Next token is", *yytokenp, yylvalp, yyllocp);
+             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)
            {

-             size_t yynewStack = yysplitStack (yystack, yyk);
+             size_t yynewStack = yysplitStack (yystackp, yyk);

              YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n",
                          (unsigned long int) yynewStack,
                          (unsigned long int) yyk));
              YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n",
                          (unsigned long int) yynewStack,
                          (unsigned long int) yyk));

-             YYCHK (yyglrReduce (yystack, yynewStack,
+             YYCHK (yyglrReduce (yystackp, yynewStack,

                                  *yyconflicts, yyfalse]b4_user_args[));
                                  *yyconflicts, yyfalse]b4_user_args[));

-             YYCHK (yyprocessOneStack (yystack, yynewStack, yyposn,
-                                       yylvalp, yyllocp]b4_pure_args[));
+             YYCHK (yyprocessOneStack (yystackp, yynewStack,
+                                       yyposn]b4_pure_args[));

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

-           {
-             YYDPRINTF ((stderr, "On stack %lu, ", (unsigned long int) yyk));
-             YY_SYMBOL_PRINT ("shifting", *yytokenp, yylvalp, yyllocp);
-             yyglrShift (yystack, yyk, yyaction, yyposn+1,
-                         *yylvalp, yyllocp);
-             YYDPRINTF ((stderr, "Stack %lu now in state #%d\n",
-                         (unsigned long int) yyk,
-                         yystack->yytops.yystates[yyk]->yylrState));
-             break;
-           }
+           break;

          else if (yyisErrorAction (yyaction))
            {
              YYDPRINTF ((stderr, "Stack %lu dies.\n",
                          (unsigned long int) yyk));
          else if (yyisErrorAction (yyaction))
            {
              YYDPRINTF ((stderr, "Stack %lu dies.\n",
                          (unsigned long int) yyk));

-             yymarkStackDeleted (yystack, yyk);
+             yymarkStackDeleted (yystackp, yyk);

              break;
            }
          else
              break;
            }
          else

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

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

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

 {
 {

-  /* Suppress unused-variable warnings.  */
-  yylvalp = yylvalp;
-  yyllocp = yyllocp;
-
-  if (yystack->yyerrState == 0)
+  if (yystackp->yyerrState == 0)

     {
 #if YYERROR_VERBOSE
     {
 #if YYERROR_VERBOSE

-      yySymbol* const yytokenp = yystack->yytokenp;

       int yyn;
       int yyn;

-      yyn = yypact[yystack->yytops.yystates[0]->yylrState];
+      yyn = yypact[yystackp->yytops.yystates[0]->yylrState];

       if (YYPACT_NINF < yyn && yyn < YYLAST)
        {
       if (YYPACT_NINF < yyn && yyn < YYLAST)
        {

-         size_t yysize0 = yytnamerr (NULL, yytokenName (*yytokenp));
+         yySymbol yytoken = YYTRANSLATE (yychar);
+         size_t yysize0 = yytnamerr (NULL, yytokenName (yytoken));

          size_t yysize = yysize0;
          size_t yysize1;
          yybool yysize_overflow = yyfalse;
          size_t yysize = yysize0;
          size_t yysize1;
          yybool yysize_overflow = yyfalse;


@@ -1887,7 +2109,7 @@ yyreportSyntaxError (yyGLRStack* yystack,
          int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
          int yycount = 1;
 
          int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
          int yycount = 1;
 

-         yyarg[0] = yytokenName (*yytokenp);
+         yyarg[0] = yytokenName (yytoken);

          yyfmt = yystpcpy (yyformat, yyunexpected);
 
          for (yyx = yyxbegin; yyx < yyxend; ++yyx)
          yyfmt = yystpcpy (yyformat, yyunexpected);
 
          for (yyx = yyxbegin; yyx < yyxend; ++yyx)


@@ -1939,7 +2161,7 @@ yyreportSyntaxError (yyGLRStack* yystack,
          else
            {
              yyerror (]b4_lyyerror_args[YY_("syntax error"));
          else
            {
              yyerror (]b4_lyyerror_args[YY_("syntax error"));

-             yyMemoryExhausted (yystack);
+             yyMemoryExhausted (yystackp);

            }
        }
       else
            }
        }
       else


@@ -1949,49 +2171,47 @@ yyreportSyntaxError (yyGLRStack* yystack,
     }
 }
 
     }
 }
 

-/* Recover from a syntax error on YYSTACK, assuming that YYTOKENP,
-   YYLVALP, and YYLLOCP point to the syntactic category, semantic
-   value, and location of the look-ahead.  */
-static void
-yyrecoverSyntaxError (yyGLRStack* yystack,
-                     YYSTYPE* yylvalp,
-                     YYLTYPE* YYOPTIONAL_LOC (yyllocp)
-                     ]b4_user_formals[)
+/* 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;

   size_t yyk;
   int yyj;
 
   size_t yyk;
   int yyj;
 

-  if (yystack->yyerrState == 3)
+  if (yystackp->yyerrState == 3)

     /* We just shifted the error token and (perhaps) took some
        reductions.  Skip tokens until we can proceed.  */
     /* We just shifted the error token and (perhaps) took some
        reductions.  Skip tokens until we can proceed.  */

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

       {
       {

-       if (*yytokenp == YYEOF)
-         yyFail (yystack][]b4_lpure_args[, NULL);
-       if (*yytokenp != YYEMPTY)
+       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
          {]b4_location_if([[
            /* We throw away the lookahead, but the error range

-              of the shifted error token must take it into account. */
-           yyGLRState *yys = yystack->yytops.yystates[0];
+              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;
            yyGLRStackItem yyerror_range[3];
            yyerror_range[1].yystate.yyloc = yys->yyloc;

-           yyerror_range[2].yystate.yyloc = *yyllocp;
-           YYLLOC_DEFAULT (yys->yyloc, yyerror_range, 2);]])[
+           yyerror_range[2].yystate.yyloc = yylloc;
+           YYLLOC_DEFAULT ((yys->yyloc), yyerror_range, 2);]])[
+           yytoken = YYTRANSLATE (yychar);

            yydestruct ("Error: discarding",
            yydestruct ("Error: discarding",

-                       *yytokenp, yylvalp]b4_location_if([, yyllocp])[);
+                       yytoken, &yylval]b4_location_if([, &yylloc])[]b4_user_args[);

          }
          }

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

        yychar = YYLEX;
        yychar = YYLEX;

-       *yytokenp = YYTRANSLATE (yychar);
-       YY_SYMBOL_PRINT ("Next token is", *yytokenp, yylvalp, yyllocp);
-       yyj = yypact[yystack->yytops.yystates[0]->yylrState];
+       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;
        if (yyis_pact_ninf (yyj))
          return;

-       yyj += *yytokenp;
-       if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != *yytokenp)
+       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;
          }
        else if (yytable[yyj] != 0 && ! yyis_table_ninf (yytable[yyj]))
              return;
          }
        else if (yytable[yyj] != 0 && ! yyis_table_ninf (yytable[yyj]))


@@ -1999,21 +2219,21 @@ yyrecoverSyntaxError (yyGLRStack* yystack,
       }
 
   /* Reduce to one stack.  */
       }
 
   /* Reduce to one stack.  */

-  for (yyk = 0; yyk < yystack->yytops.yysize; yyk += 1)
-    if (yystack->yytops.yystates[yyk] != NULL)
+  for (yyk = 0; yyk < yystackp->yytops.yysize; yyk += 1)
+    if (yystackp->yytops.yystates[yyk] != NULL)

       break;
       break;

-  if (yyk >= yystack->yytops.yysize)
-    yyFail (yystack][]b4_lpure_args[, 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. */
-  yystack->yyerrState = 3;
-  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)

     {
     {

-      yyGLRState *yys = yystack->yytops.yystates[0];
+      yyGLRState *yys = yystackp->yytops.yystates[0];

       yyj = yypact[yys->yylrState];
       if (! yyis_pact_ninf (yyj))
        {
       yyj = yypact[yys->yylrState];
       if (! yyis_pact_ninf (yyj))
        {


@@ -2023,24 +2243,24 @@ yyrecoverSyntaxError (yyGLRStack* yystack,
            {
              /* Shift the error token having adjusted its location.  */
              YYLTYPE yyerrloc;]b4_location_if([[
            {
              /* Shift the error token having adjusted its location.  */
              YYLTYPE yyerrloc;]b4_location_if([[

-             yystack->yyerror_range[2].yystate.yyloc = *yyllocp;
-             YYLLOC_DEFAULT (yyerrloc, yystack->yyerror_range, 2);]])[
+             yystackp->yyerror_range[2].yystate.yyloc = yylloc;
+             YYLLOC_DEFAULT (yyerrloc, (yystackp->yyerror_range), 2);]])[

              YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]],
              YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]],

-                              yylvalp, &yyerrloc);
-             yyglrShift (yystack, 0, yytable[yyj],
-                         yys->yyposn, *yylvalp, &yyerrloc);
-             yys = yystack->yytops.yystates[0];
+                              &yylval, &yyerrloc);
+             yyglrShift (yystackp, 0, yytable[yyj],
+                         yys->yyposn, &yylval, &yyerrloc);
+             yys = yystackp->yytops.yystates[0];

              break;
            }
        }
              break;
            }
        }

-]b4_location_if([[      yystack->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
-      yydestroyGLRState ("Error: popping", yys);
-      yystack->yytops.yystates[0] = yys->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][]b4_lpure_args[, NULL);
+  if (yystackp->yytops.yystates[0] == NULL)
+    yyFail (yystackp][]b4_lpure_args[, NULL);

 }
 
 #define YYCHK1(YYE)                                                         \
 }
 
 #define YYCHK1(YYE)                                                         \


@@ -2057,7 +2277,7 @@ yyrecoverSyntaxError (yyGLRStack* yystack,
     default:                                                                \
       goto yybuglab;                                                        \
     }                                                                       \
     default:                                                                \
       goto yybuglab;                                                        \
     }                                                                       \

-  } while (0)
+  } while (YYID (0))

 
 
 /*----------.
 
 
 /*----------.


@@ -2067,23 +2287,13 @@ yyrecoverSyntaxError (yyGLRStack* yystack,
 ]b4_c_ansi_function_def([yyparse], [int], b4_parse_param)[
 {
   int yyresult;
 ]b4_c_ansi_function_def([yyparse], [int], b4_parse_param)[
 {
   int yyresult;

-  yySymbol yytoken;

   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;
+  YYDPRINTF ((stderr, "Starting parse\n"));

 
 

-  YYDPUTS ("Starting parse\n", stderr);
-
-  yytoken = YYEMPTY;
+  yychar = YYEMPTY;

   yylval = yyval_default;
 ]b4_location_if([
 #if YYLTYPE_IS_TRIVIAL
   yylval = yyval_default;
 ]b4_location_if([
 #if YYLTYPE_IS_TRIVIAL


@@ -2094,14 +2304,14 @@ yyrecoverSyntaxError (yyGLRStack* yystack,
 m4_ifdef([b4_initial_action], [
 m4_pushdef([b4_at_dollar],     [yylloc])dnl
 m4_pushdef([b4_dollar_dollar], [yylval])dnl
 m4_ifdef([b4_initial_action], [
 m4_pushdef([b4_at_dollar],     [yylloc])dnl
 m4_pushdef([b4_dollar_dollar], [yylval])dnl

-  /* User initialization code. */
+  /* 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
 [
   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 (&yystack, YYINITDEPTH))
+  if (! yyinitGLRStack (yystackp, YYINITDEPTH))

     goto yyexhaustedlab;
   switch (YYSETJMP (yystack.yyexception_buffer))
     {
     goto yyexhaustedlab;
   switch (YYSETJMP (yystack.yyexception_buffer))
     {


@@ -2110,24 +2320,23 @@ b4_syncline([@oline@], [@ofile@])])dnl
     case 2: goto yyexhaustedlab;
     default: goto yybuglab;
     }
     case 2: goto yyexhaustedlab;
     default: goto yybuglab;
     }

-  yystack.yytokenp = &yytoken;
-  yyglrShift (&yystack, 0, 0, 0, yylval, &yylloc);
+  yyglrShift (&yystack, 0, 0, 0, &yylval, &yylloc);

   yyposn = 0;
 
   yyposn = 0;
 

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

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

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

        {
          yyRuleNum yyrule;
          int yyaction;
          const short int* yyconflicts;
 
          yyStateNum yystate = yystack.yytops.yystates[0]->yylrState;
        {
          yyRuleNum yyrule;
          int yyaction;
          const short int* yyconflicts;
 
          yyStateNum yystate = yystack.yytops.yystates[0]->yylrState;

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

          if (yystate == YYFINAL)
            goto yyacceptlab;
          if (yyisDefaultedState (yystate))
          if (yystate == YYFINAL)
            goto yyacceptlab;
          if (yyisDefaultedState (yystate))


@@ -2135,38 +2344,41 @@ b4_syncline([@oline@], [@ofile@])])dnl
              yyrule = yydefaultAction (yystate);
              if (yyrule == 0)
                {
              yyrule = yydefaultAction (yystate);
              if (yyrule == 0)
                {

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

                  goto yyuser_error;
                }
              YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue]b4_user_args[));
            }
          else
            {
                  goto yyuser_error;
                }
              YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue]b4_user_args[));
            }
          else
            {

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

                {
                {

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

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

-                  YY_SYMBOL_PRINT ("Next token is", yytoken, yylvalp, yyllocp);
+                 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))
                {

-                 YY_SYMBOL_PRINT ("Shifting", yytoken, yylvalp, yyllocp);
-                 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);
+                 yyglrShift (&yystack, 0, yyaction, yyposn, &yylval, &yylloc);

                  if (0 < yystack.yyerrState)
                    yystack.yyerrState -= 1;
                }
              else if (yyisErrorAction (yyaction))
                {
                  if (0 < yystack.yyerrState)
                    yystack.yyerrState -= 1;
                }
              else if (yyisErrorAction (yyaction))
                {

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

                  goto yyuser_error;
                }
              else
                  goto yyuser_error;
                }
              else


@@ -2174,15 +2386,35 @@ b4_syncline([@oline@], [@ofile@])])dnl
            }
        }
 
            }
        }
 

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

        {
        {

+         yySymbol yytoken_to_shift;

          size_t yys;
          size_t yys;

-         size_t yyn = yystack.yytops.yysize;
-         for (yys = 0; yys < yyn; yys += 1)
-           YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn,
-                                      yylvalp, yyllocp]b4_lpure_args[));
-         yytoken = YYEMPTY;
-         yyposn += 1;
+
+         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)
            {
          yyremoveDeletes (&yystack);
          if (yystack.yytops.yysize == 0)
            {


@@ -2190,22 +2422,48 @@ b4_syncline([@oline@], [@ofile@])])dnl
              if (yystack.yytops.yysize == 0)
                yyFail (&yystack][]b4_lpure_args[, YY_("syntax error"));
              YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
              if (yystack.yytops.yysize == 0)
                yyFail (&yystack][]b4_lpure_args[, YY_("syntax error"));
              YYCHK1 (yyresolveStack (&yystack]b4_user_args[));

-             YYDPUTS ("Returning to deterministic operation.\n", stderr);
-]b4_location_if([[           yystack.yyerror_range[1].yystate.yyloc = *yyllocp;]])[
-             yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
+             YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
+]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)
+           {
+             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[));
            {
              YYCHK1 (yyresolveStack (&yystack]b4_user_args[));

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

              yycompressStack (&yystack);
              break;
            }
        }
       continue;
     yyuser_error:
              yycompressStack (&yystack);
              break;
            }
        }
       continue;
     yyuser_error:

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

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


@@ -2215,7 +2473,7 @@ b4_syncline([@oline@], [@ofile@])])dnl
 
  yybuglab:
   YYASSERT (yyfalse);
 
  yybuglab:
   YYASSERT (yyfalse);

-  /* Fall through.  */
+  goto yyabortlab;

 
  yyabortlab:
   yyresult = 1;
 
  yyabortlab:
   yyresult = 1;


@@ -2224,12 +2482,13 @@ b4_syncline([@oline@], [@ofile@])])dnl
  yyexhaustedlab:
   yyerror (]b4_lyyerror_args[YY_("memory exhausted"));
   yyresult = 2;
  yyexhaustedlab:
   yyerror (]b4_lyyerror_args[YY_("memory exhausted"));
   yyresult = 2;

-  /* Fall through.  */
+  goto yyreturn;

 
  yyreturn:
 
  yyreturn:

-  if (yytoken != YYEOF && yytoken != YYEMPTY)
+  if (yychar != YYEOF && yychar != YYEMPTY)

     yydestruct ("Cleanup: discarding lookahead",
     yydestruct ("Cleanup: discarding lookahead",

-                yytoken, yylvalp]b4_location_if([, yyllocp])[);
+               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
 
   /* If the stack is well-formed, pop the stack until it is empty,
      destroying its entries as we go.  But free the stack regardless


@@ -2238,15 +2497,24 @@ b4_syncline([@oline@], [@ofile@])])dnl
     {
       yyGLRState** yystates = yystack.yytops.yystates;
       if (yystates)
     {
       yyGLRState** yystates = yystack.yytops.yystates;
       if (yystates)

-       while (yystates[0])
-         {
-           yyGLRState *yys = yystates[0];
-]b4_location_if([[       yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
-)[         yydestroyGLRState ("Cleanup: popping", yys);
-           yystates[0] = yys->yypred;
-           yystack.yynextFree -= 1;
-           yystack.yyspaceLeft += 1;
-         }
+       {
+         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);
     }
 
       yyfreeGLRStack (&yystack);
     }
 


@@ -2255,9 +2523,9 @@ b4_syncline([@oline@], [@ofile@])])dnl
 
 /* DEBUGGING ONLY */
 #ifdef YYDEBUG
 
 /* DEBUGGING ONLY */
 #ifdef YYDEBUG

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

   __attribute__ ((__unused__));
   __attribute__ ((__unused__));

-static void yypdumpstack (yyGLRStack* yystack) __attribute__ ((__unused__));
+static void yypdumpstack (yyGLRStack* yystackp) __attribute__ ((__unused__));

 
 static void
 yy_yypstack (yyGLRState* yys)
 
 static void
 yy_yypstack (yyGLRState* yys)


@@ -2265,7 +2533,7 @@ yy_yypstack (yyGLRState* yys)
   if (yys->yypred)
     {
       yy_yypstack (yys->yypred);
   if (yys->yypred)
     {
       yy_yypstack (yys->yypred);

-      fputs (" -> ", stderr);
+      fprintf (stderr, " -> ");

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


@@ -2274,30 +2542,30 @@ static void
 yypstates (yyGLRState* yyst)
 {
   if (yyst == NULL)
 yypstates (yyGLRState* yyst)
 {
   if (yyst == NULL)

-    fputs ("<null>", stderr);
+    fprintf (stderr, "<null>");

   else
     yy_yypstack (yyst);
   else
     yy_yypstack (yyst);

-  fputc ('\n', stderr);
+  fprintf (stderr, "\n");

 }
 
 static void
 }
 
 static void

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

 {
 {

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

 }
 
 #define YYINDEX(YYX)                                                        \
 }
 
 #define YYINDEX(YYX)                                                        \

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

 
 
 static void
 
 
 static void

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

 {
   yyGLRStackItem* yyp;
   size_t yyi;
 {
   yyGLRStackItem* yyp;
   size_t yyi;

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

     {
     {

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

       if (*(yybool *) yyp)
        {
          fprintf (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
       if (*(yybool *) yyp)
        {
          fprintf (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",


@@ -2315,13 +2583,13 @@ yypdumpstack (yyGLRStack* yystack)
                   (long int) YYINDEX (yyp->yyoption.yystate),
                   (long int) YYINDEX (yyp->yyoption.yynext));
        }
                   (long int) YYINDEX (yyp->yyoption.yystate),
                   (long int) YYINDEX (yyp->yyoption.yynext));
        }

-      fputc ('\n', stderr);
+      fprintf (stderr, "\n");

     }
     }

-  fputs ("Tops:", stderr);
-  for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1)
+  fprintf (stderr, "Tops:");
+  for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)

     fprintf (stderr, "%lu: %ld; ", (unsigned long int) yyi,
     fprintf (stderr, "%lu: %ld; ", (unsigned long int) yyi,

-            (long int) YYINDEX (yystack->yytops.yystates[yyi]));
-  fputc ('\n', stderr);
+            (long int) YYINDEX (yystackp->yytops.yystates[yyi]));
+  fprintf (stderr, "\n");

 }
 #endif
 ]
 }
 #endif
 ]


@@ -2330,39 +2598,14 @@ b4_epilogue
 m4_if(b4_defines_flag, 0, [],
 [@output @output_header_name@
 b4_copyright([Skeleton parser for GLR parsing with Bison],
 m4_if(b4_defines_flag, 0, [],
 [@output @output_header_name@
 b4_copyright([Skeleton parser for GLR parsing with Bison],

-  [2002, 2003, 2004, 2005])
+            [2002, 2003, 2004, 2005, 2006])[

 
 

-b4_token_enums(b4_tokens)
-
-#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
-m4_ifdef([b4_stype],
-[b4_syncline([b4_stype_line], [b4_file_name])
-typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])b4_stype YYSTYPE;
-/* Line __line__ of glr.c.  */
-b4_syncline([@oline@], [@ofile@])],
-[typedef int YYSTYPE;])
-# define YYSTYPE_IS_DECLARED 1
-# define YYSTYPE_IS_TRIVIAL 1
-#endif
+/* C GLR parser skeleton written by Paul Hilfinger.  */
+]

 
 

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

 
 

-#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
+extern YYSTYPE b4_prefix[]lval;

 
 b4_location_if([b4_pure_if([],
 [extern YYLTYPE b4_prefix[]lloc;])
 
 b4_location_if([b4_pure_if([],
 [extern YYLTYPE b4_prefix[]lloc;])