Merge remote-tracking branch 'origin/maint'

[bison.git] / data / glr.c

diff --git a/data/glr.c b/data/glr.c
index d004cec973f39b2f2e259b63eb827730f907b315..e2363a2083bf184202dfc53ad1737eced8d11e23 100644 (file)
--- a/data/glr.c
+++ b/data/glr.c
@@ -1,23 +1,27 @@
-m4_divert(-1)                                                       -*- C -*-
+                                                                    -*- C -*-

 
 # GLR skeleton for Bison
 
 # GLR skeleton for Bison

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

 
 

-# This program is free software; you can redistribute it and/or modify
+# Copyright (C) 2002-2012 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
 # it under the terms of the GNU General Public License as published by

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

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

-
+#

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

-
+#

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

-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301  USA
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+

 
 

+# If we are loaded by glr.cc, do not override c++.m4 definitions by
+# those of c.m4.
+m4_if(b4_skeleton, ["glr.c"],
+      [m4_include(b4_pkgdatadir/[c.m4])])

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


@@ -33,65 +37,84 @@ m4_define_default([b4_stack_depth_init],  [200])
 ## Pure/impure interfaces.  ##
 ## ------------------------ ##
 
 ## Pure/impure interfaces.  ##
 ## ------------------------ ##
 

+b4_define_flag_if([pure])
+# If glr.cc is including this file and thus has already set b4_pure_flag,
+# do not change the value of b4_pure_flag, and do not record a use of api.pure.
+m4_ifndef([b4_pure_flag],
+[b4_percent_define_default([[api.pure]], [[false]])
+ m4_define([b4_pure_flag],
+           [b4_percent_define_flag_if([[api.pure]], [[1]], [[0]])])])
+
+# 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_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_locations_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],
 m4_define([b4_yyerror_args],

-[b4_pure_if([b4_location_if([yylocp, ])])dnl
-m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
+[b4_pure_if([b4_locations_if([yylocp, ])])dnl
+m4_ifset([b4_parse_param], [b4_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 lookahead, hence &yylloc instead of yylocp.

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

-[b4_pure_if([b4_location_if([yyllocp, ])])dnl
-m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
+[b4_pure_if([b4_locations_if([&yylloc, ])])dnl
+m4_ifset([b4_parse_param], [b4_args(b4_parse_param), ])])

 
 
 # b4_pure_args
 # ------------
 
 
 # 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],
 m4_define([b4_pure_args],

-[b4_pure_if([b4_location_if([, yylocp])])[]b4_user_args])
+[b4_pure_if([b4_locations_if([, yylocp])])[]b4_user_args])
+
+
+# b4_lpure_args
+# -------------
+# Same as above, but on the lookahead, hence &yylloc instead of yylocp.
+m4_define([b4_lpure_args],
+[b4_pure_if([b4_locations_if([, &yylloc])])[]b4_user_args])
+

 
 
 # b4_pure_formals
 # ---------------
 
 
 # b4_pure_formals
 # ---------------

-# Arguments passed to yyerror: user formals plus yyllocp.
+# Arguments passed to yyerror: user formals plus yylocp with leading comma.

 m4_define([b4_pure_formals],
 m4_define([b4_pure_formals],

-[b4_pure_if([b4_location_if([, YYLTYPE *yylocp])])[]b4_user_formals])
+[b4_pure_if([b4_locations_if([, YYLTYPE *yylocp])])[]b4_user_formals])

 
 
 
 

-# b4_lpure_args
-# -------------
-# Same as above, but on the look-ahead, hence yyllocp instead of yylocp.
-m4_define([b4_lpure_args],
-[b4_pure_if([b4_location_if([, yyllocp])])[]b4_user_args])
+# b4_locuser_formals(LOC = yylocp)
+# --------------------------------
+m4_define([b4_locuser_formals],
+[b4_locations_if([, YYLTYPE *m4_default([$1], [yylocp])])[]b4_user_formals])

 
 
 
 

-# 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_locuser_args(LOC = yylocp)
+# -----------------------------
+m4_define([b4_locuser_args],
+[b4_locations_if([, m4_default([$1], [yylocp])])[]b4_user_args])
+

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


@@ -103,7 +126,15 @@ m4_define([b4_lpure_formals],
 # --------------------
 # Expansion of $<TYPE>$.
 m4_define([b4_lhs_value],
 # --------------------
 # Expansion of $<TYPE>$.
 m4_define([b4_lhs_value],

-[((*yyvalp)[]m4_ifval([$1], [.$1]))])
+[b4_symbol_value([(*yyvalp)], [$1])])
+
+
+# b4_rhs_data(RULE-LENGTH, NUM)
+# -----------------------------
+# Expand to the semantic stack place that contains value and location
+# of symbol number NUM in a rule of length RULE-LENGTH.
+m4_define([b4_rhs_data],
+[((yyGLRStackItem const *)yyvsp)@{YYFILL (b4_subtract([$2], [$1]))@}.yystate])

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


@@ -111,7 +142,7 @@ 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]))])
+[b4_symbol_value([b4_rhs_data([$1], [$2]).yysemantics.yysval], [$3])])

 
 
 
 
 
 


@@ -131,105 +162,109 @@ 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)])
+[(b4_rhs_data([$1], [$2]).yyloc)])
+
+
+## -------------- ##
+## Declarations.  ##
+## -------------- ##
+
+# b4_shared_declarations
+# ----------------------
+# Declaration that might either go into the header (if --defines)
+# or open coded in the parser body.  glr.cc has its own definition.
+m4_if(b4_skeleton, ["glr.c"],
+[m4_define([b4_shared_declarations],
+[b4_declare_yydebug[
+]b4_percent_code_get([[requires]])[
+]b4_token_enums[
+]b4_declare_yylstype[
+]b4_function_declare(b4_prefix[parse], [int], b4_parse_param)[
+]b4_percent_code_get([[provides]])[]dnl
+])
+])
+
+## -------------- ##
+## Output files.  ##
+## -------------- ##

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

-m4_divert(0)dnl
-@output @output_parser_name@
-b4_copyright([Skeleton parser for GLR parsing with Bison],
-  [2002, 2003, 2004, 2005])
+m4_divert_push(0)dnl
+@output(b4_parser_file_name@)@
+b4_copyright([Skeleton implementation for Bison GLR parsers in C],
+             [2002-2012])

 [
 [

-/* This is the parser code for GLR (Generalized LR) parser. */
+/* C GLR parser skeleton written by Paul Hilfinger.  */

 
 ]b4_identification
 
 ]b4_identification

-m4_if(b4_prefix[], [yy], [],
-[/* Substitute the variable and function names.  */
-#define yyparse b4_prefix[]parse
-#define yylex   b4_prefix[]lex
-#define yyerror b4_prefix[]error
-#define yylval  b4_prefix[]lval
-#define yychar  b4_prefix[]char
-#define yydebug b4_prefix[]debug
-#define yynerrs b4_prefix[]nerrs
-#define yylloc b4_prefix[]lloc])
-
-b4_token_defines(b4_tokens)
-
-/* Copy the first part of user declarations.  */
-b4_pre_prologue[
-
-/* Enabling traces.  */
-#ifndef YYDEBUG
-# define YYDEBUG ]b4_debug[
-#endif
+
+b4_percent_code_get([[top]])[
+]m4_if(b4_api_prefix, [yy], [],
+[[/* Substitute the type names.  */
+#define YYSTYPE ]b4_api_PREFIX[STYPE]b4_locations_if([[
+#define YYLTYPE ]b4_api_PREFIX[LTYPE]])])[
+]m4_if(b4_prefix, [yy], [],
+[[/* Substitute the variable and function names.  */
+#define yyparse ]b4_prefix[parse
+#define yylex   ]b4_prefix[lex
+#define yyerror ]b4_prefix[error
+#define yylval  ]b4_prefix[lval
+#define yychar  ]b4_prefix[char
+#define yydebug ]b4_prefix[debug
+#define yynerrs ]b4_prefix[nerrs]b4_locations_if([[
+#define yylloc  ]b4_prefix[lloc]])])[
+
+/* First part of user declarations.  */
+]b4_user_pre_prologue[
+
+]b4_null_define[
+
+]b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]],
+               [b4_shared_declarations])[

 
 /* Enabling verbose error messages.  */
 #ifdef YYERROR_VERBOSE
 # undef YYERROR_VERBOSE
 # define YYERROR_VERBOSE 1
 #else
 
 /* Enabling verbose error messages.  */
 #ifdef YYERROR_VERBOSE
 # undef YYERROR_VERBOSE
 # define YYERROR_VERBOSE 1
 #else

-# define YYERROR_VERBOSE ]b4_error_verbose[
-#endif
-
-#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
-]m4_ifdef([b4_stype],
-[b4_syncline([b4_stype_line], [b4_filename])
-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
-
-#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
+# define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[

 #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
 #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

-   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.  */

-]b4_post_prologue[
+]b4_user_post_prologue
+b4_percent_code_get[]dnl

 
 

-]/* Line __line__ of glr.c.  */
-b4_syncline([@oline@], [@ofile@])
-[
-#include <stdio.h>
+[#include <stdio.h>

 #include <stdlib.h>
 #include <string.h>
 #include <stdlib.h>
 #include <string.h>

-#include <stdarg.h>
-#include <setjmp.h>

 
 #ifndef YY_
 
 #ifndef YY_

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

 #  if ENABLE_NLS
 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
 #  if ENABLE_NLS
 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */

-#   define YY_(msgid) dgettext ("bison-runtime", msgid)
+#   define YY_(Msgid) dgettext ("bison-runtime", Msgid)

 #  endif
 # endif
 # ifndef YY_
 #  endif
 # endif
 # ifndef YY_

-#  define YY_(msgid) msgid
+#  define YY_(Msgid) Msgid

 # endif
 #endif
 
 # endif
 #endif
 

+/* Suppress unused-variable warnings by "using" E.  */
+#ifdef __GNUC__
+# define YYUSE(E) ((void) (E))
+#else
+# define YYUSE(E) /* empty */
+#endif
+

 #ifndef YYFREE
 # define YYFREE free
 #endif
 #ifndef YYFREE
 # define YYFREE free
 #endif


@@ -250,59 +285,62 @@ b4_syncline([@oline@], [@ofile@])
 #define yytrue 1
 #define yyfalse 0
 
 #define yytrue 1
 #define yyfalse 0
 

+#ifndef YYSETJMP
+# include <setjmp.h>
+# define YYJMP_BUF jmp_buf
+# define YYSETJMP(Env) setjmp (Env)
+// Pacify clang.
+# define YYLONGJMP(Env, Val) (longjmp (Env, Val), YYASSERT (0))
+#endif
+

 /*-----------------.
 | GCC extensions.  |
 `-----------------*/
 
 #ifndef __attribute__
 /* This feature is available in gcc versions 2.5 and later.  */
 /*-----------------.
 | GCC extensions.  |
 `-----------------*/
 
 #ifndef __attribute__
 /* This feature is available in gcc versions 2.5 and later.  */

-# if !defined (__GNUC__) || __GNUC__ < 2 || \
-(__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__
+# if (! defined __GNUC__ || __GNUC__ < 2 \
+      || (__GNUC__ == 2 && __GNUC_MINOR__ < 5))

 #  define __attribute__(Spec) /* empty */
 #  define __attribute__(Spec) /* empty */

-# else
-]b4_location_if([#  define YYOPTIONAL_LOC(Name) Name],[
-#  if defined (__cplusplus)
-#   define YYOPTIONAL_LOC(Name) /* empty */
-#  else
-#   define YYOPTIONAL_LOC(Name) Name ATTRIBUTE_UNUSED
-#  endif])[

 # endif
 #endif
 
 # endif
 #endif
 

-#ifndef YYASSERT
-# define YYASSERT(condition) ((void) ((condition) || (abort (), 0)))
-#endif
+]b4_locations_if([#define YYOPTIONAL_LOC(Name) Name],[
+#ifdef __cplusplus
+# define YYOPTIONAL_LOC(Name) /* empty */
+#else
+# define YYOPTIONAL_LOC(Name) Name __attribute__ ((__unused__))
+#endif])[

 
 

-#ifndef ATTRIBUTE_UNUSED
-# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+#ifndef YYASSERT
+# define YYASSERT(Condition) ((void) ((Condition) || (abort (), 0)))

 #endif
 
 #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 YYUNDEFTOK  ]b4_undef_token_number[
 #define YYMAXUTOK   ]b4_user_token_number_max[
 
 #define YYMAXLEFT ]b4_max_left_semantic_context[
 
 /* YYTRANSLATE(X) -- Bison symbol number corresponding to X.  */
 #define YYUNDEFTOK  ]b4_undef_token_number[
 #define YYMAXUTOK   ]b4_user_token_number_max[
 

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

 
 /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX.  */
 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
 
 /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX.  */
 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =


@@ -310,20 +348,7 @@ static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
   ]b4_translate[
 };
 
   ]b4_translate[
 };
 

-#if YYDEBUG
-/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
-   YYRHS.  */
-static const ]b4_int_type_for([b4_prhs])[ yyprhs[] =
-{
-  ]b4_prhs[
-};
-
-/* YYRHS -- A `-1'-separated list of the rules' RHS. */
-static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =
-{
-  ]b4_rhs[
-};
-
+#if ]b4_api_PREFIX[DEBUG

 /* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
 static const ]b4_int_type_for([b4_rline])[ yyrline[] =
 {
 /* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
 static const ]b4_int_type_for([b4_rline])[ yyrline[] =
 {


@@ -331,75 +356,37 @@ static const ]b4_int_type_for([b4_rline])[ yyrline[] =
 };
 #endif
 
 };
 #endif
 

-#if (YYDEBUG) || YYERROR_VERBOSE
+#if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[

 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
 /* 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[
 };
 #endif
 
 static const char *const yytname[] =
 {
   ]b4_tname[
 };
 #endif
 

-/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
-static const ]b4_int_type_for([b4_r1])[ yyr1[] =
-{
-  ]b4_r1[
-};
+#define YYPACT_NINF ]b4_pact_ninf[
+#define YYTABLE_NINF ]b4_table_ninf[

 
 

-/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
-static const ]b4_int_type_for([b4_r2])[ yyr2[] =
-{
-  ]b4_r2[
-};
+]b4_parser_tables_define[

 
 

-/* 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[
 };
 

-/* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE
-   doesn't specify something else to do.  Zero means the default is an
-   error.  */
-static const ]b4_int_type_for([b4_defact])[ yydefact[] =
-{
-  ]b4_defact[
-};
-
-/* YYPDEFGOTO[NTERM-NUM]. */
-static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =
-{
-  ]b4_defgoto[
-};
-
-/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
-   STATE-NUM.  */
-#define YYPACT_NINF ]b4_pact_ninf[
-static const ]b4_int_type_for([b4_pact])[ yypact[] =
-{
-  ]b4_pact[
-};
-
-/* YYPGOTO[NTERM-NUM].  */
-static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] =
+/* YYIMMEDIATE[RULE-NUM] -- True iff rule #RULE-NUM is not to be deferred, as
+   in the case of predicates.  */
+static const yybool yyimmediate[] =

 {
 {

-  ]b4_pgoto[
-};
-
-/* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
-   positive, shift that token.  If negative, reduce the rule which
-   number is the opposite.  If zero, do what YYDEFACT says.
-   If YYTABLE_NINF, syntax error.  */
-#define YYTABLE_NINF ]b4_table_ninf[
-static const ]b4_int_type_for([b4_table])[ yytable[] =
-{
-  ]b4_table[
+  ]b4_immediate[

 };
 
 /* YYCONFLP[YYPACT[STATE-NUM]] -- Pointer into YYCONFL of start of
 };
 
 /* YYCONFLP[YYPACT[STATE-NUM]] -- Pointer into YYCONFL of start of


@@ -421,57 +408,21 @@ dnl We probably ought to introduce a type for confl.
   ]b4_conflicting_rules[
 };
 
   ]b4_conflicting_rules[
 };
 

-static const ]b4_int_type_for([b4_check])[ yycheck[] =
-{
-  ]b4_check[
-};
-
-/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
-   symbol of state STATE-NUM.  */
-static const ]b4_int_type_for([b4_stos])[ yystos[] =
-{
-  ]b4_stos[
-};
-
-\f
-/* Prevent warning if -Wmissing-prototypes.  */
-]b4_c_ansi_function_decl([yyparse], [int], b4_parse_param)[
-

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

-/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
-   If N is 0, then set CURRENT to the empty location which ends
-   the previous symbol: RHS[0] (always defined).  */
-
-]b4_location_if([[
-#define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
+]b4_locations_if([[

 #ifndef YYLLOC_DEFAULT
 #ifndef YYLLOC_DEFAULT

-# define YYLLOC_DEFAULT(Current, Rhs, N)                               \
-    do                                                                 \
-      if (N)                                                           \
-       {                                                               \
-         (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;        \
-         (Current).first_column = YYRHSLOC (Rhs, 1).first_column;      \
-         (Current).last_line    = YYRHSLOC (Rhs, N).last_line;         \
-         (Current).last_column  = YYRHSLOC (Rhs, N).last_column;       \
-       }                                                               \
-      else                                                             \
-       {                                                               \
-         (Current).first_line   = (Current).last_line   =              \
-           YYRHSLOC (Rhs, 0).last_line;                                \
-         (Current).first_column = (Current).last_column =              \
-           YYRHSLOC (Rhs, 0).last_column;                              \
-       }                                                               \
-    while (0)
+]b4_yylloc_default_define[
+# define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)

 
 /* YY_LOCATION_PRINT -- Print the location on the stream.
    This macro was not mandated originally: define only if we know
    we won't break user code: when these are the locations we know.  */
 
 
 /* YY_LOCATION_PRINT -- Print the location on the stream.
    This macro was not mandated originally: define only if we know
    we won't break user code: when these are the locations we know.  */
 

-# define YY_LOCATION_PRINT(File, Loc)                  \
-    fprintf (File, "%d.%d-%d.%d",                      \
-             (Loc).first_line, (Loc).first_column,     \
+# define YY_LOCATION_PRINT(File, Loc)                   \
+    fprintf (File, "%d.%d-%d.%d",                       \
+             (Loc).first_line, (Loc).first_column,      \

              (Loc).last_line,  (Loc).last_column)
 #endif
 ]],[
              (Loc).last_line,  (Loc).last_column)
 #endif
 ]],[


@@ -484,19 +435,26 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] =
 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
 #endif
 
 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
 #endif
 

-

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

-#define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[
+#define YYLEX ]b4_function_call([yylex], [int], b4_lex_param)[

 
 ]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)],
-[YYSTYPE yylval;
-
-YYLTYPE yylloc;
+#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;]b4_locations_if([[
+YYLTYPE yylloc;]])[

 
 int yynerrs;
 int yychar;])[
 
 int yynerrs;
 int yychar;])[


@@ -506,47 +464,50 @@ static const int YYEMPTY = -2;
 
 typedef enum { yyok, yyaccept, yyabort, yyerr } YYRESULTTAG;
 
 
 typedef enum { yyok, yyaccept, yyabort, yyerr } YYRESULTTAG;
 

-#define YYCHK(YYE)                                                          \
-   do { YYRESULTTAG yyflag = YYE; if (yyflag != yyok) return yyflag; }      \
-   while (0)
+#define YYCHK(YYE)                              \
+  do {                                          \
+    YYRESULTTAG yychk_flag = YYE;               \
+    if (yychk_flag != yyok)                     \
+      return yychk_flag;                        \
+  } while (0)

 
 

-#if YYDEBUG
+#if ]b4_api_PREFIX[DEBUG

 
 

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

 #  define YYFPRINTF fprintf
 #  define YYFPRINTF fprintf

-#endif
+# endif

 
 

-# define YYDPRINTF(Args)                       \
-do {                                           \
-  if (yydebug)                                 \
-    YYFPRINTF Args;                            \
-} while (0)
+# define YYDPRINTF(Args)                        \
+  do {                                          \
+    if (yydebug)                                \
+      YYFPRINTF Args;                           \
+  } while (0)

 
 

-]b4_yysymprint_generate([b4_c_ansi_function_def])[
+]b4_yy_symbol_print_define[

 
 

-# define YY_SYMBOL_PRINT(Title, Type, Value, Location)         \
-do {                                                           \
-  if (yydebug)                                                 \
-    {                                                          \
-      YYFPRINTF (stderr, "%s ", Title);                                \
-      yysymprint (stderr,                                      \
-                  Type, Value]b4_location_if([, Location])[);  \
-    }                                                          \
-} while (0)
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location)                  \
+  do {                                                                  \
+    if (yydebug)                                                        \
+      {                                                                 \
+        YYFPRINTF (stderr, "%s ", Title);                               \
+        yy_symbol_print (stderr, Type, Value]b4_locuser_args([Location])[);        \
+        YYFPRINTF (stderr, "\n");                                       \
+      }                                                                 \
+  } while (0)

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

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

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

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

 
 /* YYINITDEPTH -- initial size of the parser's stacks.  */
 
 /* YYINITDEPTH -- initial size of the parser's stacks.  */

-#ifndef        YYINITDEPTH
+#ifndef YYINITDEPTH

 # define YYINITDEPTH ]b4_stack_depth_init[
 #endif
 
 # define YYINITDEPTH ]b4_stack_depth_init[
 #endif
 


@@ -565,23 +526,32 @@ 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))

 #  define YYSTACKEXPANDABLE 1
 #  define YYSTACKEXPANDABLE 1

-# else
-#  define YYSTACKEXPANDABLE 0
-# endif

 #endif
 
 #endif
 

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


@@ -617,27 +587,27 @@ yytnamerr (char *yyres, const char *yystr)
       char const *yyp = yystr;
 
       for (;;)
       char const *yyp = yystr;
 
       for (;;)

-       switch (*++yyp)
-         {
-         case '\'':
-         case ',':
-           goto do_not_strip_quotes;
-
-         case '\\':
-           if (*++yyp != '\\')
-             goto do_not_strip_quotes;
-           /* Fall through.  */
-         default:
-           if (yyres)
-             yyres[yyn] = *yyp;
-           yyn++;
-           break;
-
-         case '"':
-           if (yyres)
-             yyres[yyn] = '\0';
-           return yyn;
-         }
+        switch (*++yyp)
+          {
+          case '\'':
+          case ',':
+            goto do_not_strip_quotes;
+
+          case '\\':
+            if (*++yyp != '\\')
+              goto do_not_strip_quotes;
+            /* Fall through.  */
+          default:
+            if (yyres)
+              yyres[yyn] = *yyp;
+            yyn++;
+            break;
+
+          case '"':
+            if (yyres)
+              yyres[yyn] = '\0';
+            return yyn;
+          }

     do_not_strip_quotes: ;
     }
 
     do_not_strip_quotes: ;
     }
 


@@ -657,60 +627,69 @@ typedef int yyStateNum;
 typedef int yyRuleNum;
 
 /** Grammar symbol */
 typedef int yyRuleNum;
 
 /** Grammar symbol */

-typedef short int yySymbol;
+typedef int yySymbol;

 
 /** Item references, as in LALR(1) machine */
 typedef short int yyItemNum;
 
 typedef struct yyGLRState yyGLRState;
 
 /** Item references, as in LALR(1) machine */
 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;

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

   size_t yyposn;
   union {
     /** First in a chain of alternative reductions producing the
      *  non-terminal corresponding to this state, threaded through
   size_t yyposn;
   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;
     YYSTYPE yysval;

-  } yysemantics;
-  /** Source location for this state. */
-  YYLTYPE yyloc;
+  } yysemantics;]b4_locations_if([[
+  /** Source location for this state.  */
+  YYLTYPE yyloc;]])[

 };
 
 struct yyGLRStateSet {
   yyGLRState** yystates;
 };
 
 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;]b4_locations_if([[
+  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;


@@ -718,15 +697,16 @@ union yyGLRStackItem {
 
 struct yyGLRStack {
   int yyerrState;
 
 struct yyGLRStack {
   int yyerrState;

-]b4_location_if([[  /* To compute the location of the error token.  */
+]b4_locations_if([[  /* To compute the location of the error token.  */

   yyGLRStackItem yyerror_range[3];]])[
 ]b4_pure_if(
 [
   int yyerrcnt;
   int yyrawchar;
   yyGLRStackItem yyerror_range[3];]])[
 ]b4_pure_if(
 [
   int yyerrcnt;
   int yyrawchar;

+  YYSTYPE yyval;]b4_locations_if([[
+  YYLTYPE yyloc;]])[

 ])[
 ])[

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

   yyGLRStackItem* yyitems;
   yyGLRStackItem* yynextFree;
   size_t yyspaceLeft;
   yyGLRStackItem* yyitems;
   yyGLRStackItem* yynextFree;
   size_t yyspaceLeft;


@@ -735,23 +715,29 @@ struct yyGLRStack {
   yyGLRStateSet yytops;
 };
 
   yyGLRStateSet yytops;
 };
 

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

 
 

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

 static void
 static void

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

 {
 {

-  if (yymsg != NULL)
+  if (yymsg != YY_NULL)

     yyerror (]b4_yyerror_args[yymsg);
     yyerror (]b4_yyerror_args[yymsg);

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

 }
 
 }
 

+static void yyMemoryExhausted (yyGLRStack* yystackp)
+  __attribute__ ((__noreturn__));

 static void
 static void

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

 {
 {

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

 }
 
 }
 

-#if YYDEBUG || YYERROR_VERBOSE
+#if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE

 /** A printable representation of TOKEN.  */
 static inline const char*
 yytokenName (yySymbol yytoken)
 /** A printable representation of TOKEN.  */
 static inline const char*
 yytokenName (yySymbol yytoken)


@@ -765,30 +751,35 @@ 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.  */
-static void yyfillin (yyGLRStackItem *, int, int) ATTRIBUTE_UNUSED;
+ *  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 *yyvsp, int yylow0, int yylow1)
 {

-  yyGLRState* s;

   int i;
   int i;

-  s = yyvsp[yylow0].yystate.yypred;
+  yyGLRState *s = yyvsp[yylow0].yystate.yypred;

   for (i = yylow0-1; i >= yylow1; i -= 1)
     {
   for (i = yylow0-1; i >= yylow1; i -= 1)
     {

-      YYASSERT (s->yyresolved);
-      yyvsp[i].yystate.yyresolved = yytrue;
-      yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval;
-      yyvsp[i].yystate.yyloc = s->yyloc;
+#if ]b4_api_PREFIX[DEBUG
+      yyvsp[i].yystate.yylrState = s->yylrState;
+#endif
+      yyvsp[i].yystate.yyresolved = s->yyresolved;
+      if (s->yyresolved)
+        yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval;
+      else
+        /* The effect of using yysval or yyloc (in an immediate rule) is
+         * undefined.  */
+        yyvsp[i].yystate.yysemantics.yyfirstVal = YY_NULL;]b4_locations_if([[
+      yyvsp[i].yystate.yyloc = s->yyloc;]])[

       s = yyvsp[i].yystate.yypred = s->yypred;
     }
 }
 
 /* Do nothing if YYNORMAL or if *YYLOW <= YYLOW1.  Otherwise, fill in
       s = yyvsp[i].yystate.yypred = s->yypred;
     }
 }
 
 /* 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)
 static inline int yyfill (yyGLRStackItem *, int *, int, yybool)

-     ATTRIBUTE_UNUSED;
+     __attribute__ ((__unused__));

 static inline int
 yyfill (yyGLRStackItem *yyvsp, int *yylow, int yylow1, yybool yynormal)
 {
 static inline int
 yyfill (yyGLRStackItem *yyvsp, int *yylow, int yylow1, yybool yynormal)
 {


@@ -803,20 +794,19 @@ 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

- *  (@@$). Returns yyok for normal return, yyaccept for YYACCEPT,
- *  yyerr for YYERROR, yyabort for YYABORT. */
+ *  (@@$).  Returns yyok for normal return, yyaccept for YYACCEPT,
+ *  yyerr for YYERROR, yyabort for YYABORT.  */

 static YYRESULTTAG
 yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
 static YYRESULTTAG
 yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,

-             YYSTYPE* yyvalp,
-             YYLTYPE* YYOPTIONAL_LOC (yylocp),
-             yyGLRStack* yystack
-              ]b4_user_formals[)
+              yyGLRStack* yystackp,
+              YYSTYPE* yyvalp]b4_locuser_formals[)

 {
 {

-  yybool yynormal ATTRIBUTE_UNUSED = (yystack->yysplitPoint == NULL);
+  yybool yynormal __attribute__ ((__unused__)) =
+    (yystackp->yysplitPoint == YY_NULL);

   int yylow;
   int yylow;

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

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


@@ -824,27 +814,27 @@ 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

-# define YYBACKUP(Token, Value)                                                     \
+# define YYBACKUP(Token, Value)                                              \

   return yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")),     \
   return yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")),     \

-        yyerrok, yyerr
+         yyerrok, yyerr

 
   yylow = 1;
   if (yyrhslen == 0)
     *yyvalp = yyval_default;
   else
 
   yylow = 1;
   if (yyrhslen == 0)
     *yyvalp = yyval_default;
   else

-    *yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval;
-  YYLLOC_DEFAULT (*yylocp, yyvsp - yyrhslen, yyrhslen);
-]b4_location_if([[  yystack->yyerror_range[1].yystate.yyloc = *yylocp;
-]])
+    *yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval;]b4_locations_if([[
+  YYLLOC_DEFAULT ((*yylocp), (yyvsp - yyrhslen), yyrhslen);
+  yystackp->yyerror_range[1].yystate.yyloc = *yylocp;
+]])[

   switch (yyn)
     {
   switch (yyn)
     {

-      b4_actions
+      ]b4_user_actions[

       default: break;
     }
 
       default: break;
     }
 


@@ -856,87 +846,115 @@ 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
+

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

-  /* `Use' the arguments.  */
-  (void) yy0;
-  (void) 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_define[

 
 

-/** Number of symbols composing the right hand side of rule #RULE. */
+/** Number of symbols composing the right hand side of rule #RULE.  */

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

-/** Left-hand-side symbol for rule #RULE. */
+static void
+yydestroyGLRState (char const *yymsg, yyGLRState *yys]b4_user_formals[)
+{
+  if (yys->yyresolved)
+    yydestruct (yymsg, yystos[yys->yylrState],
+                &yys->yysemantics.yysval]b4_locuser_args([&yys->yyloc])[);
+  else
+    {
+#if ]b4_api_PREFIX[DEBUG
+      if (yydebug)
+        {
+          if (yys->yysemantics.yyfirstVal)
+            YYFPRINTF (stderr, "%s unresolved ", yymsg);
+          else
+            YYFPRINTF (stderr, "%s incomplete ", yymsg);
+          yy_symbol_print (stderr, yystos[yys->yylrState],
+                           YY_NULL]b4_locuser_args([&yys->yyloc])[);
+          YYFPRINTF (stderr, "\n");
+        }
+#endif
+
+      if (yys->yysemantics.yyfirstVal)
+        {
+          yySemanticOption *yyoption = yys->yysemantics.yyfirstVal;
+          yyGLRState *yyrh;
+          int yyn;
+          for (yyrh = yyoption->yystate, yyn = yyrhsLength (yyoption->yyrule);
+               yyn > 0;
+               yyrh = yyrh->yypred, yyn -= 1)
+            yydestroyGLRState (yymsg, yyrh]b4_user_args[);
+        }
+    }
+}
+
+/** Left-hand-side symbol for rule #YYRULE.  */

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

-#define yyis_pact_ninf(yystate) \
-  ]m4_if(m4_eval(b4_pact_ninf < b4_pact_min), 1,
-        0,
-        ((yystate) == YYPACT_NINF))[
+#define yypact_value_is_default(Yystate) \
+  ]b4_table_value_equals([[pact]], [[Yystate]], [b4_pact_ninf])[

 
 

-/** True iff LR state STATE has only a default reduction (regardless
- *  of token). */
+/** True iff LR state YYSTATE has only a default reduction (regardless
+ *  of token).  */

 static inline yybool
 yyisDefaultedState (yyStateNum yystate)
 {
 static inline yybool
 yyisDefaultedState (yyStateNum yystate)
 {

-  return yyis_pact_ninf (yypact[yystate]);
+  return yypact_value_is_default (yypact[yystate]);

 }
 
 }
 

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

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

-#define yyis_table_ninf(yytable_value) \
-  ]m4_if(m4_eval(b4_table_ninf < b4_table_min), 1,
-        0,
-        ((yytable_value) == YYTABLE_NINF))[
+#define yytable_value_is_error(Yytable_value) \
+  ]b4_table_value_equals([[table]], [[Yytable_value]], [b4_table_ninf])[

 
 /** Set *YYACTION to the action to take in YYSTATE on seeing YYTOKEN.
  *  Result R means
  *    R < 0:  Reduce on rule -R.
  *    R = 0:  Error.
  *    R > 0:  Shift to state R.
 
 /** Set *YYACTION to the action to take in YYSTATE on seeing YYTOKEN.
  *  Result R means
  *    R < 0:  Reduce on rule -R.
  *    R = 0:  Error.
  *    R > 0:  Shift to state R.

- *  Set *CONFLICTS to a pointer into yyconfl to 0-terminated list of
- *  conflicting reductions.
+ *  Set *YYCONFLICTS to a pointer into yyconfl to a 0-terminated list
+ *  of conflicting reductions.

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

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

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

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

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


@@ -951,8 +969,7 @@ yygetLRActions (yyStateNum yystate, int yytoken,
 static inline yyStateNum
 yyLRgotoState (yyStateNum yystate, yySymbol yylhs)
 {
 static inline yyStateNum
 yyLRgotoState (yyStateNum yystate, yySymbol yylhs)
 {

-  int yyr;
-  yyr = yypgoto[yylhs - YYNTOKENS] + yystate;
+  int yyr = yypgoto[yylhs - YYNTOKENS] + yystate;

   if (0 <= yyr && yyr <= YYLAST && yycheck[yyr] == yystate)
     return yytable[yyr];
   else
   if (0 <= yyr && yyr <= YYLAST && yycheck[yyr] == yystate)
     return yytable[yyr];
   else


@@ -971,28 +988,52 @@ yyisErrorAction (int yyaction)
   return yyaction == 0;
 }
 
   return yyaction == 0;
 }
 

-                               /* GLRStates */
+                                /* GLRStates */

 
 

-static void
-yyaddDeferredAction (yyGLRStack* yystack, yyGLRState* yystate,
-                    yyGLRState* rhs, yyRuleNum yyrule)
+/** Return a fresh GLRStackItem in YYSTACKP.  The item is an LR state
+ *  if YYISSTATE, and otherwise a semantic option.  Callers should call
+ *  YY_RESERVE_GLRSTACK afterwards to make sure there is sufficient
+ *  headroom.  */
+
+static inline yyGLRStackItem*
+yynewGLRStackItem (yyGLRStack* yystackp, yybool yyisState)

 {
 {

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

 }
 
 }
 

-                               /* GLRStacks */
+/** Add a new semantic action that will execute the action for rule
+ *  YYRULE on the semantic values in YYRHS to the list of
+ *  alternative actions for YYSTATE.  Assumes that YYRHS comes from
+ *  stack #YYK of *YYSTACKP. */
+static void
+yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate,
+                     yyGLRState* yyrhs, yyRuleNum yyrule)
+{
+  yySemanticOption* yynewOption =
+    &yynewGLRStackItem (yystackp, yyfalse)->yyoption;
+  yynewOption->yystate = yyrhs;
+  yynewOption->yyrule = yyrule;
+  if (yystackp->yytops.yylookaheadNeeds[yyk])
+    {
+      yynewOption->yyrawchar = yychar;
+      yynewOption->yyval = yylval;]b4_locations_if([
+      yynewOption->yyloc = yylloc;])[
+    }
+  else
+    yynewOption->yyrawchar = YYEMPTY;
+  yynewOption->yynext = yystate->yysemantics.yyfirstVal;
+  yystate->yysemantics.yyfirstVal = yynewOption;

 
 

-/** Initialize SET to a singleton set containing an empty stack. */
+  YY_RESERVE_GLRSTACK (yystackp);
+}
+
+                                /* GLRStacks */
+
+/** Initialize YYSET to a singleton set containing an empty stack.  */

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


@@ -1001,237 +1042,290 @@ yyinitStateSet (yyGLRStateSet* yyset)
   yyset->yystates = (yyGLRState**) YYMALLOC (16 * sizeof yyset->yystates[0]);
   if (! yyset->yystates)
     return yyfalse;
   yyset->yystates = (yyGLRState**) YYMALLOC (16 * sizeof yyset->yystates[0]);
   if (! yyset->yystates)
     return yyfalse;

-  yyset->yystates[0] = NULL;
+  yyset->yystates[0] = YY_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
- *  capacity for all stacks of SIZE. */
+/** Initialize *YYSTACKP to a single empty stack, with total maximum
+ *  capacity for all stacks of YYSIZE.  */

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

 }
 
 }
 

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

   &((YYTOITEMS) - ((YYFROMITEMS) - (yyGLRStackItem*) (YYX)))->YYTYPE
 
   &((YYTOITEMS) - ((YYFROMITEMS) - (yyGLRStackItem*) (YYX)))->YYTYPE
 

-/** If STACK is expandable, extend it.  WARNING: Pointers into the
+/** If *YYSTACKP 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
     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;
   yyGLRStackItem* yynewItems;
   yyGLRStackItem* yyp0, *yyp1;

-  size_t yysize, yynewSize;
+  size_t yynewSize;

   size_t yyn;
   size_t yyn;

-  yysize = yystack->yynextFree - yystack->yyitems;
-  if (YYMAXDEPTH <= yysize)
-    yyMemoryExhausted (yystack);
+  size_t 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)
     {
       *yyp1 = *yyp0;
       if (*(yybool *) yyp0)
        0 < yyn;
        yyn -= 1, yyp0 += 1, yyp1 += 1)
     {
       *yyp1 = *yyp0;
       if (*(yybool *) yyp0)

-       {
-         yyGLRState* yys0 = &yyp0->yystate;
-         yyGLRState* yys1 = &yyp1->yystate;
-         if (yys0->yypred != NULL)
-           yys1->yypred =
-             YYRELOC (yyp0, yyp1, yys0->yypred, yystate);
-         if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != NULL)
-           yys1->yysemantics.yyfirstVal =
-             YYRELOC(yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption);
-       }
+        {
+          yyGLRState* yys0 = &yyp0->yystate;
+          yyGLRState* yys1 = &yyp1->yystate;
+          if (yys0->yypred != YY_NULL)
+            yys1->yypred =
+              YYRELOC (yyp0, yyp1, yys0->yypred, yystate);
+          if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != YY_NULL)
+            yys1->yysemantics.yyfirstVal =
+              YYRELOC (yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption);
+        }

       else
       else

-       {
-         yySemanticOption* yyv0 = &yyp0->yyoption;
-         yySemanticOption* yyv1 = &yyp1->yyoption;
-         if (yyv0->yystate != NULL)
-           yyv1->yystate = YYRELOC (yyp0, yyp1, yyv0->yystate, yystate);
-         if (yyv0->yynext != NULL)
-           yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption);
-       }
+        {
+          yySemanticOption* yyv0 = &yyp0->yyoption;
+          yySemanticOption* yyv1 = &yyp1->yyoption;
+          if (yyv0->yystate != YY_NULL)
+            yyv1->yystate = YYRELOC (yyp0, yyp1, yyv0->yystate, yystate);
+          if (yyv0->yynext != YY_NULL)
+            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 != YY_NULL)
+    yystackp->yysplitPoint = YYRELOC (yystackp->yyitems, yynewItems,
+                                 yystackp->yysplitPoint, yystate);
+
+  for (yyn = 0; yyn < yystackp->yytops.yysize; yyn += 1)
+    if (yystackp->yytops.yystates[yyn] != YY_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
- *  S. */
+/** Assuming that YYS is a GLRState somewhere on *YYSTACKP, update the
+ *  splitpoint of *YYSTACKP, if needed, so that it is at least as deep as
+ *  YYS.  */

 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 != YY_NULL && yystackp->yysplitPoint > yys)
+    yystackp->yysplitPoint = yys;

 }
 
 }
 

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

 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] != YY_NULL)
+    yystackp->yylastDeleted = yystackp->yytops.yystates[yyk];
+  yystackp->yytops.yystates[yyk] = YY_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
-    been deleted. */
+/** Undelete the last stack in *YYSTACKP that was marked as deleted.  Can
+    only be done once after a deletion, and only when all other stacks have
+    been deleted.  */

 static void
 static void

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

 {
 {

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

     return;
     return;

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

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

-  yystack->yylastDeleted = NULL;
+  yystackp->yylastDeleted = YY_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 (yyi == yyj)
-           {
-             YYDPRINTF ((stderr, "Removing dead stacks.\n"));
-           }
-         yystack->yytops.yysize -= 1;
-       }
+      if (yystackp->yytops.yystates[yyi] == YY_NULL)
+        {
+          if (yyi == yyj)
+            {
+              YYDPRINTF ((stderr, "Removing dead stacks.\n"));
+            }
+          yystackp->yytops.yysize -= 1;
+        }

       else
       else

-       {
-         yystack->yytops.yystates[yyj] = yystack->yytops.yystates[yyi];
-         if (yyj != yyi)
-           {
-             YYDPRINTF ((stderr, "Rename stack %lu -> %lu.\n",
-                         (unsigned long int) yyi, (unsigned long int) yyj));
-           }
-         yyj += 1;
-       }
+        {
+          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",
+                          (unsigned long int) yyi, (unsigned long int) yyj));
+            }
+          yyj += 1;
+        }

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

-/** Shift to a new state on stack #K of STACK, corresponding to LR state
- * LRSTATE, at input position POSN, with (resolved) semantic value SVAL. */
+/** Shift to a new state on stack #YYK of *YYSTACKP, corresponding to LR
+ * state YYLRSTATE, at input position YYPOSN, with (resolved) semantic
+ * value *YYVALP and source location *YYLOCP.  */

 static inline void
 static inline void

-yyglrShift (yyGLRStack* yystack, size_t yyk, yyStateNum yylrState,
-           size_t yyposn,
-           YYSTYPE yysval, YYLTYPE* yylocp)
+yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
+            size_t yyposn,
+            YYSTYPE* yyvalp]b4_locations_if([, 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);
+  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;]b4_locations_if([
+  yynewState->yyloc = *yylocp;])[
+  yystackp->yytops.yystates[yyk] = yynewState;
+
+  YY_RESERVE_GLRSTACK (yystackp);

 }
 
 }
 

-/** Shift stack #K of YYSTACK, to a new state corresponding to LR
+/** Shift stack #YYK of *YYSTACKP, to a new state corresponding to LR

  *  state YYLRSTATE, at input position YYPOSN, with the (unresolved)
  *  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,
-                size_t yyposn, yyGLRState* rhs, yyRuleNum yyrule)
+yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
+                 size_t yyposn, yyGLRState* yyrhs, yyRuleNum yyrule)

 {
 {

-  yyGLRStackItem* yynewItem;
-
-  yynewItem = yystack->yynextFree;
-  yynewItem->yystate.yyisState = yytrue;
-  yynewItem->yystate.yylrState = yylrState;
-  yynewItem->yystate.yyposn = yyposn;
-  yynewItem->yystate.yyresolved = yyfalse;
-  yynewItem->yystate.yypred = yystack->yytops.yystates[yyk];
-  yynewItem->yystate.yysemantics.yyfirstVal = NULL;
-  yystack->yytops.yystates[yyk] = &yynewItem->yystate;
-  yystack->yynextFree += 1;
-  yystack->yyspaceLeft -= 1;
-  yyaddDeferredAction (yystack, &yynewItem->yystate, 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 = YY_NULL;
+  yystackp->yytops.yystates[yyk] = yynewState;
+
+  /* Invokes YY_RESERVE_GLRSTACK.  */
+  yyaddDeferredAction (yystackp, yyk, yynewState, yyrhs, yyrule);

 }
 
 }
 

-/** Pop the symbols consumed by reduction #RULE from the top of stack
- *  #K of STACK, and perform the appropriate semantic action on their
+#if !]b4_api_PREFIX[DEBUG
+# define YY_REDUCE_PRINT(Args)
+#else
+# define YY_REDUCE_PRINT(Args)          \
+do {                                    \
+  if (yydebug)                          \
+    yy_reduce_print Args;               \
+} while (0)
+
+/*----------------------------------------------------------------------.
+| Report that stack #YYK of *YYSTACKP is going to be reduced by YYRULE. |
+`----------------------------------------------------------------------*/
+
+static inline void
+yy_reduce_print (int yynormal, yyGLRStackItem* yyvsp, size_t yyk,
+                 yyRuleNum yyrule]b4_user_formals[)
+{
+  int yynrhs = yyrhsLength (yyrule);]b4_locations_if([
+  int yylow = 1;])[
+  int yyi;
+  YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu):\n",
+             (unsigned long int) yyk, yyrule - 1,
+             (unsigned long int) yyrline[yyrule]);
+  if (! yynormal)
+    yyfillin (yyvsp, 1, -yynrhs);
+  /* The symbols being reduced.  */
+  for (yyi = 0; yyi < yynrhs; yyi++)
+    {
+      YYFPRINTF (stderr, "   $%d = ", yyi + 1);
+      yy_symbol_print (stderr,
+                       yystos[yyvsp[yyi - yynrhs + 1].yystate.yylrState],
+                       &yyvsp[yyi - yynrhs + 1].yystate.yysemantics.yysval
+                       ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
+                       b4_user_args[);
+      if (!yyvsp[yyi - yynrhs + 1].yystate.yyresolved)
+        YYFPRINTF (stderr, " (unresolved)");
+      YYFPRINTF (stderr, "\n");
+    }
+}
+#endif
+
+/** Pop the symbols consumed by reduction #YYRULE from the top of stack
+ *  #YYK of *YYSTACKP, and perform the appropriate semantic action on their

  *  semantic values.  Assumes that all ambiguities in semantic values
  *  semantic values.  Assumes that all ambiguities in semantic values

- *  have been previously resolved. Set *VALP to the resulting value,
- *  and *LOCP to the computed location (if any).  Return value is as
- *  for userAction. */
+ *  have been previously resolved.  Set *YYVALP to the resulting value,
+ *  and *YYLOCP to the computed location (if any).  Return value is as
+ *  for userAction.  */

 static inline YYRESULTTAG
 static inline YYRESULTTAG

-yydoAction (yyGLRStack* yystack, size_t yyk, yyRuleNum yyrule,
-           YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
+yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
+            YYSTYPE* yyvalp]b4_locuser_formals[)

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

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

     {
     {

-      /* Standard special case: single stack. */
-      yyGLRStackItem* rhs = (yyGLRStackItem*) yystack->yytops.yystates[yyk];
+      /* Standard special case: single stack.  */
+      yyGLRStackItem* yyrhs = (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;
-      return yyuserAction (yyrule, yynrhs, rhs,
-                          yyvalp, yylocp, yystack]b4_user_args[);
+      yystackp->yynextFree -= yynrhs;
+      yystackp->yyspaceLeft += yynrhs;
+      yystackp->yytops.yystates[0] = & yystackp->yynextFree[-1].yystate;
+      YY_REDUCE_PRINT ((1, yyrhs, yyk, yyrule]b4_user_args[));
+      return yyuserAction (yyrule, yynrhs, yyrhs, yystackp,
+                           yyvalp]b4_locuser_args[);

     }
   else
     {
     }
   else
     {


@@ -1239,147 +1333,151 @@ yydoAction (yyGLRStack* yystack, size_t yyk, yyRuleNum yyrule,
       yyGLRState* yys;
       yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
       yys = yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred
       yyGLRState* yys;
       yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
       yys = yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred

-       = yystack->yytops.yystates[yyk];
+        = yystackp->yytops.yystates[yyk];]b4_locations_if([[
+      if (yynrhs == 0)
+        /* Set default location.  */
+        yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yys->yyloc;]])[

       for (yyi = 0; yyi < yynrhs; yyi += 1)
       for (yyi = 0; yyi < yynrhs; yyi += 1)

-       {
-         yys = yys->yypred;
-         YYASSERT (yys);
-       }
-      yyupdateSplit (yystack, yys);
-      yystack->yytops.yystates[yyk] = yys;
+        {
+          yys = yys->yypred;
+          YYASSERT (yys);
+        }
+      yyupdateSplit (yystackp, yys);
+      yystackp->yytops.yystates[yyk] = yys;
+      YY_REDUCE_PRINT ((0, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1, yyk, yyrule]b4_user_args[));

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

-                          yyvalp, yylocp, yystack]b4_user_args[);
+                           yystackp, yyvalp]b4_locuser_args[);

     }
 }
 
     }
 }
 

-#if !YYDEBUG
-# define YY_REDUCE_PRINT(K, Rule)
-#else
-# define YY_REDUCE_PRINT(K, Rule)      \
-do {                                   \
-  if (yydebug)                         \
-    yy_reduce_print (K, Rule);         \
-} while (0)
-
-/*----------------------------------------------------------.
-| Report that the RULE is going to be reduced on stack #K.  |
-`----------------------------------------------------------*/
-
-static inline void
-yy_reduce_print (size_t yyk, yyRuleNum yyrule)
-{
-  int yyi;
-  YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu), ",
-            (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]));
-}
-#endif
-
-/** Pop items off stack #K of STACK according to grammar rule RULE,
+/** Pop items off stack #YYK of *YYSTACKP according to grammar rule YYRULE,

  *  and push back on the resulting nonterminal symbol.  Perform the
  *  and push back on the resulting nonterminal symbol.  Perform the

- *  semantic action associated with RULE and store its value with the
- *  newly pushed state, if FORCEEVAL or if STACK is currently
+ *  semantic action associated with YYRULE and store its value with the
+ *  newly pushed state, if YYFORCEEVAL or if *YYSTACKP is currently

  *  unambiguous.  Otherwise, store the deferred semantic action with
  *  the new state.  If the new state would have an identical input
  *  position, LR state, and predecessor to an existing state on the stack,
  *  unambiguous.  Otherwise, store the deferred semantic action with
  *  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
+ *  it is identified with that existing state, eliminating stack #YYK from
+ *  *YYSTACKP.  In this case, the 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,
+yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,

              yybool yyforceEval]b4_user_formals[)
 {
              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 == YY_NULL)

     {
     {

-      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,
-                                yylhsNonterm (yyrule)),
-                 yyposn, yysval, &yyloc);
+      YYRESULTTAG yyflag;
+      YYSTYPE yysval;]b4_locations_if([
+      YYLTYPE yyloc;])[
+
+      yyflag = yydoAction (yystackp, yyk, yyrule, &yysval]b4_locuser_args([&yyloc])[);
+      if (yyflag == yyerr && yystackp->yysplitPoint != YY_NULL)
+        {
+          YYDPRINTF ((stderr, "Parse on stack %lu rejected by rule #%d.\n",
+                     (unsigned long int) yyk, yyrule - 1));
+        }
+      if (yyflag != yyok)
+        return yyflag;
+      YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyrule], &yysval, &yyloc);
+      yyglrShift (yystackp, yyk,
+                  yyLRgotoState (yystackp->yytops.yystates[yyk]->yylrState,
+                                 yylhsNonterm (yyrule)),
+                  yyposn, &yysval]b4_locations_if([, &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);
-          0 < yyn; yyn -= 1)
-       {
-         yys = yys->yypred;
-         YYASSERT (yys);
-       }
-      yyupdateSplit (yystack, yys);
+      for (yys = yystackp->yytops.yystates[yyk], yyn = yyrhsLength (yyrule);
+           0 < yyn; yyn -= 1)
+        {
+          yys = yys->yypred;
+          YYASSERT (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",
-                 (unsigned long int) yyk, yyrule - 1, yynewLRState));
-      for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1)
-       if (yyi != yyk && yystack->yytops.yystates[yyi] != NULL)
-         {
-           yyGLRState* yyp, *yysplit = yystack->yysplitPoint;
-           yyp = yystack->yytops.yystates[yyi];
-           while (yyp != yys && yyp != yysplit && yyp->yyposn >= yyposn)
-             {
-               if (yyp->yylrState == yynewLRState && yyp->yypred == yys)
-                 {
-                   yyaddDeferredAction (yystack, yyp, yys0, yyrule);
-                   yymarkStackDeleted (yystack, yyk);
-                   YYDPRINTF ((stderr, "Merging stack %lu into stack %lu.\n",
-                               (unsigned long int) yyk,
-                               (unsigned long int) yyi));
-                   return yyok;
-                 }
-               yyp = yyp->yypred;
-             }
-         }
-      yystack->yytops.yystates[yyk] = yys;
-      yyglrShiftDefer (yystack, yyk, yynewLRState, yyposn, yys0, yyrule);
+                  "Reduced stack %lu by rule #%d; action deferred.  "
+                  "Now in state %d.\n",
+                  (unsigned long int) yyk, yyrule - 1, yynewLRState));
+      for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)
+        if (yyi != yyk && yystackp->yytops.yystates[yyi] != YY_NULL)
+          {
+            yyGLRState *yysplit = yystackp->yysplitPoint;
+            yyGLRState *yyp = yystackp->yytops.yystates[yyi];
+            while (yyp != yys && yyp != yysplit && yyp->yyposn >= yyposn)
+              {
+                if (yyp->yylrState == yynewLRState && yyp->yypred == yys)
+                  {
+                    yyaddDeferredAction (yystackp, yyk, yyp, yys0, yyrule);
+                    yymarkStackDeleted (yystackp, yyk);
+                    YYDPRINTF ((stderr, "Merging stack %lu into stack %lu.\n",
+                                (unsigned long int) yyk,
+                                (unsigned long int) yyi));
+                    return yyok;
+                  }
+                yyp = yyp->yypred;
+              }
+          }
+      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 == YY_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 = YY_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 == YY_NULL)
+        yyMemoryExhausted (yystackp);
+      yystackp->yytops.yystates = yynewStates;
+
+      yynewLookaheadNeeds =
+        (yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds,
+                             (yystackp->yytops.yycapacity
+                              * sizeof yynewLookaheadNeeds[0]));
+      if (yynewLookaheadNeeds == YY_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.
+/** True iff YYY0 and YYY1 represent identical options at the top level.

  *  That is, they represent the same rule applied to RHS symbols
  *  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)
 {


@@ -1388,19 +1486,19 @@ yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
       yyGLRState *yys0, *yys1;
       int yyn;
       for (yys0 = yyy0->yystate, yys1 = yyy1->yystate,
       yyGLRState *yys0, *yys1;
       int yyn;
       for (yys0 = yyy0->yystate, yys1 = yyy1->yystate,

-          yyn = yyrhsLength (yyy0->yyrule);
-          yyn > 0;
-          yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)
-       if (yys0->yyposn != yys1->yyposn)
-         return yyfalse;
+           yyn = yyrhsLength (yyy0->yyrule);
+           yyn > 0;
+           yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)
+        if (yys0->yyposn != yys1->yyposn)
+          return yyfalse;

       return yytrue;
     }
   else
     return yyfalse;
 }
 
       return yytrue;
     }
   else
     return yyfalse;
 }
 

-/** Assuming identicalOptions (Y0,Y1), destructively merge the
- *  alternative semantic values for the RHS-symbols of Y1 and Y0. */
+/** Assuming identicalOptions (YYY0,YYY1), destructively merge the
+ *  alternative semantic values for the RHS-symbols of YYY1 and YYY0.  */

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


@@ -1412,49 +1510,47 @@ yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
        yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)
     {
       if (yys0 == yys1)
        yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)
     {
       if (yys0 == yys1)

-       break;
+        break;

       else if (yys0->yyresolved)
       else if (yys0->yyresolved)

-       {
-         yys1->yyresolved = yytrue;
-         yys1->yysemantics.yysval = yys0->yysemantics.yysval;
-       }
+        {
+          yys1->yyresolved = yytrue;
+          yys1->yysemantics.yysval = yys0->yysemantics.yysval;
+        }

       else if (yys1->yyresolved)
       else if (yys1->yyresolved)

-       {
-         yys0->yyresolved = yytrue;
-         yys0->yysemantics.yysval = yys1->yysemantics.yysval;
-       }
+        {
+          yys0->yyresolved = yytrue;
+          yys0->yysemantics.yysval = yys1->yysemantics.yysval;
+        }

       else
       else

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

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

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

 static int
 yypreference (yySemanticOption* y0, yySemanticOption* y1)
 {
 static int
 yypreference (yySemanticOption* y0, yySemanticOption* y1)
 {


@@ -1464,9 +1560,9 @@ yypreference (yySemanticOption* y0, yySemanticOption* y1)
   if (p0 == p1)
     {
       if (yymerger[r0] == 0 || yymerger[r0] != yymerger[r1])
   if (p0 == p1)
     {
       if (yymerger[r0] == 0 || yymerger[r0] != yymerger[r1])

-       return 0;
+        return 0;

       else
       else

-       return 1;
+        return 1;

     }
   if (p0 == 0 || p1 == 0)
     return 0;
     }
   if (p0 == 0 || p1 == 0)
     return 0;


@@ -1477,61 +1573,84 @@ 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 YYN states starting at and including state YYS
+ *  on *YYSTACKP. 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 YYOPT on *YYSTACKP, perform its
+ *  user action, and return the semantic value and location in *YYVALP
+ *  and *YYLOCP.  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]b4_locuser_formals[)

 {
   yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
 {
   yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];

-  int yynrhs;
-
-  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[);
+  int yynrhs = yyrhsLength (yyopt->yyrule);
+  YYRESULTTAG 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_locations_if([[
+  if (yynrhs == 0)
+    /* Set default location.  */
+    yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yyopt->yystate->yyloc;]])[
+  {
+    int yychar_current = yychar;
+    YYSTYPE yylval_current = yylval;]b4_locations_if([
+    YYLTYPE yylloc_current = yylloc;])[
+    yychar = yyopt->yyrawchar;
+    yylval = yyopt->yyval;]b4_locations_if([
+    yylloc = yyopt->yyloc;])[
+    yyflag = yyuserAction (yyopt->yyrule, yynrhs,
+                           yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
+                           yystackp, yyvalp]b4_locuser_args[);
+    yychar = yychar_current;
+    yylval = yylval_current;]b4_locations_if([
+    yylloc = yylloc_current;])[
+  }
+  return yyflag;

 }
 
 }
 

-#if YYDEBUG
+#if ]b4_api_PREFIX[DEBUG

 static void
 yyreportTree (yySemanticOption* yyx, int yyindent)
 {
   int yynrhs = yyrhsLength (yyx->yyrule);
   int yyi;
   yyGLRState* yys;
 static void
 yyreportTree (yySemanticOption* yyx, int yyindent)
 {
   int yynrhs = yyrhsLength (yyx->yyrule);
   int yyi;
   yyGLRState* yys;

-  yyGLRState* yystates[YYMAXRHS];
+  yyGLRState* yystates[1 + YYMAXRHS];

   yyGLRState yyleftmost_state;
 
   for (yyi = yynrhs, yys = yyx->yystate; 0 < yyi; yyi -= 1, yys = yys->yypred)
     yystates[yyi] = yys;
   yyGLRState yyleftmost_state;
 
   for (yyi = yynrhs, yys = yyx->yystate; 0 < yyi; yyi -= 1, yys = yys->yypred)
     yystates[yyi] = yys;

-  if (yys == NULL)
+  if (yys == YY_NULL)

     {
       yyleftmost_state.yyposn = 0;
       yystates[0] = &yyleftmost_state;
     {
       yyleftmost_state.yyposn = 0;
       yystates[0] = &yyleftmost_state;


@@ -1541,41 +1660,40 @@ yyreportTree (yySemanticOption* yyx, int yyindent)
 
   if (yyx->yystate->yyposn < yys->yyposn + 1)
     YYFPRINTF (stderr, "%*s%s -> <Rule %d, empty>\n",
 
   if (yyx->yystate->yyposn < yys->yyposn + 1)
     YYFPRINTF (stderr, "%*s%s -> <Rule %d, empty>\n",

-              yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
-              yyx->yyrule);
+               yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
+               yyx->yyrule - 1);

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

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

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

-       {
-         if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn)
-           YYFPRINTF (stderr, "%*s%s <empty>\n", yyindent+2, "",
-                      yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]));
-         else
-           YYFPRINTF (stderr, "%*s%s <tokens %lu .. %lu>\n", yyindent+2, "",
-                      yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]),
-                      (unsigned long int) (yystates[yyi - 1]->yyposn + 1),
-                      (unsigned long int) yystates[yyi]->yyposn);
-       }
+        {
+          if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn)
+            YYFPRINTF (stderr, "%*s%s <empty>\n", yyindent+2, "",
+                       yytokenName (yystos[yystates[yyi]->yylrState]));
+          else
+            YYFPRINTF (stderr, "%*s%s <tokens %lu .. %lu>\n", yyindent+2, "",
+                       yytokenName (yystos[yystates[yyi]->yylrState]),
+                       (unsigned long int) (yystates[yyi-1]->yyposn + 1),
+                       (unsigned long int) yystates[yyi]->yyposn);
+        }

       else
       else

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

     }
 }
 #endif
 
     }
 }
 #endif
 

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

 {
 {

-  /* `Unused' warnings.  */
-  (void) yyx0;
-  (void) yyx1;
+  YYUSE (yyx0);
+  YYUSE (yyx1);

 
 

-#if YYDEBUG
+#if ]b4_api_PREFIX[DEBUG

   YYFPRINTF (stderr, "Ambiguity detected.\n");
   YYFPRINTF (stderr, "Option 1,\n");
   yyreportTree (yyx0, 2);
   YYFPRINTF (stderr, "Ambiguity detected.\n");
   YYFPRINTF (stderr, "Option 1,\n");
   yyreportTree (yyx0, 2);


@@ -1583,556 +1701,756 @@ yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1,
   yyreportTree (yyx1, 2);
   YYFPRINTF (stderr, "\n");
 #endif
   yyreportTree (yyx1, 2);
   YYFPRINTF (stderr, "\n");
 #endif

-  yyFail (yystack][]b4_pure_args[, YY_("syntax is ambiguous"));
-}

 
 

+  yyerror (]b4_yyerror_args[YY_("syntax is ambiguous"));
+  return yyabort;
+}]b4_locations_if([[

 
 

-/** Resolve the ambiguity represented by OPTIONLIST, perform the indicated
- *  actions, and return the result. */
+/** Resolve the locations for each of the YYN1 states in *YYSTACKP,
+ *  ending at YYS1.  Has no effect on previously resolved states.
+ *  The first semantic option of a state is always chosen.  */
+static void
+yyresolveLocations (yyGLRState* yys1, int yyn1,
+                    yyGLRStack *yystackp]b4_user_formals[)
+{
+  if (0 < yyn1)
+    {
+      yyresolveLocations (yys1->yypred, yyn1 - 1, yystackp]b4_user_args[);
+      if (!yys1->yyresolved)
+        {
+          yyGLRStackItem yyrhsloc[1 + YYMAXRHS];
+          int yynrhs;
+          yySemanticOption *yyoption = yys1->yysemantics.yyfirstVal;
+          YYASSERT (yyoption != YY_NULL);
+          yynrhs = yyrhsLength (yyoption->yyrule);
+          if (yynrhs > 0)
+            {
+              yyGLRState *yys;
+              int yyn;
+              yyresolveLocations (yyoption->yystate, yynrhs,
+                                  yystackp]b4_user_args[);
+              for (yys = yyoption->yystate, yyn = yynrhs;
+                   yyn > 0;
+                   yys = yys->yypred, yyn -= 1)
+                yyrhsloc[yyn].yystate.yyloc = yys->yyloc;
+            }
+          else
+            {
+              /* Both yyresolveAction and yyresolveLocations traverse the GSS
+                 in reverse rightmost order.  It is only necessary to invoke
+                 yyresolveLocations on a subforest for which yyresolveAction
+                 would have been invoked next had an ambiguity not been
+                 detected.  Thus the location of the previous state (but not
+                 necessarily the previous state itself) is guaranteed to be
+                 resolved already.  */
+              yyGLRState *yyprevious = yyoption->yystate;
+              yyrhsloc[0].yystate.yyloc = yyprevious->yyloc;
+            }
+          {
+            int yychar_current = yychar;
+            YYSTYPE yylval_current = yylval;
+            YYLTYPE yylloc_current = yylloc;
+            yychar = yyoption->yyrawchar;
+            yylval = yyoption->yyval;
+            yylloc = yyoption->yyloc;
+            YYLLOC_DEFAULT ((yys1->yyloc), yyrhsloc, yynrhs);
+            yychar = yychar_current;
+            yylval = yylval_current;
+            yylloc = yylloc_current;
+          }
+        }
+    }
+}]])[
+
+/** Resolve the ambiguity represented in state YYS in *YYSTACKP,
+ *  perform the indicated actions, and set the semantic value of YYS.
+ *  If result != yyok, the chain of semantic options in YYS has been
+ *  cleared instead or it has been left unmodified except that
+ *  redundant options may have been removed.  Regardless of whether
+ *  result = yyok, YYS 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* yybest;
-  yySemanticOption* yyp;
-  yybool yymerge;
+  yySemanticOption* yyoptionList = yys->yysemantics.yyfirstVal;
+  yySemanticOption* yybest = yyoptionList;
+  yySemanticOption** yypp;
+  yybool yymerge = yyfalse;
+  YYSTYPE yysval;
+  YYRESULTTAG yyflag;]b4_locations_if([
+  YYLTYPE *yylocp = &yys->yyloc;])[

 
 

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

     {
     {

+      yySemanticOption* yyp = *yypp;
+

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

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

       else
       else

-       switch (yypreference (yybest, yyp))
-         {
-         case 0:
-           yyreportAmbiguity (yybest, yyp, yystack]b4_pure_args[);
-           break;
-         case 1:
-           yymerge = yytrue;
-           break;
-         case 2:
-           break;
-         case 3:
-           yybest = yyp;
-           yymerge = yyfalse;
-           break;
-         }
+        {
+          switch (yypreference (yybest, yyp))
+            {
+            case 0:]b4_locations_if([[
+              yyresolveLocations (yys, 1, yystackp]b4_user_args[);]])[
+              return yyreportAmbiguity (yybest, yyp]b4_pure_args[);
+              break;
+            case 1:
+              yymerge = yytrue;
+              break;
+            case 2:
+              break;
+            case 3:
+              yybest = yyp;
+              yymerge = yyfalse;
+              break;
+            default:
+              /* This cannot happen so it is not worth a YYASSERT (yyfalse),
+                 but some compilers complain if the default case is
+                 omitted.  */
+              break;
+            }
+          yypp = &yyp->yynext;
+        }

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

+      yySemanticOption* yyp;

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

-      YYCHK (yyresolveAction (yybest, yystack, yyvalp, yylocp]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]b4_locuser_args[);
+      if (yyflag == yyok)
+        for (yyp = yybest->yynext; yyp != YY_NULL; yyp = yyp->yynext)
+          {
+            if (yyprec == yydprec[yyp->yyrule])
+              {
+                YYSTYPE yysval_other;]b4_locations_if([
+                YYLTYPE yydummy;])[
+                yyflag = yyresolveAction (yyp, yystackp, &yysval_other]b4_locuser_args([&yydummy])[);
+                if (yyflag != yyok)
+                  {
+                    yydestruct ("Cleanup: discarding incompletely merged value for",
+                                yystos[yys->yylrState],
+                                &yysval]b4_locuser_args[);
+                    break;
+                  }
+                yyuserMerge (yymerger[yyp->yyrule], &yysval, &yysval_other);
+              }
+          }
+    }
+  else
+    yyflag = yyresolveAction (yybest, yystackp, &yysval]b4_locuser_args([yylocp])[);
+
+  if (yyflag == yyok)
+    {
+      yys->yyresolved = yytrue;
+      yys->yysemantics.yysval = yysval;

     }
   else
     }
   else

-    return yyresolveAction (yybest, yystack, yyvalp, yylocp]b4_user_args[);
+    yys->yysemantics.yyfirstVal = YY_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 != YY_NULL)

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

-      for (yyn = 0, yys = yystack->yytops.yystates[0];
-          yys != yystack->yysplitPoint;
-          yys = yys->yypred, yyn += 1)
-       continue;
-      YYCHK (yyresolveStates (yystack->yytops.yystates[0], yyn, yystack
-                            ]b4_user_args[));
+      for (yyn = 0, yys = yystackp->yytops.yystates[0];
+           yys != yystackp->yysplitPoint;
+           yys = yys->yypred, yyn += 1)
+        continue;
+      YYCHK (yyresolveStates (yystackp->yytops.yystates[0], yyn, yystackp
+                             ]b4_user_args[));

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

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

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

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

 
 

-  while (yyr != NULL)
+  while (yyr != YY_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;
-  yySymbol* const yytokenp = yystack->yytokenp;
-
-  while (yystack->yytops.yystates[yyk] != NULL)
+  while (yystackp->yytops.yystates[yyk] != YY_NULL)

     {
     {

-      yyStateNum yystate = yystack->yytops.yystates[yyk]->yylrState;
+      yyStateNum yystate = yystackp->yytops.yystates[yyk]->yylrState;

       YYDPRINTF ((stderr, "Stack %lu Entering state %d\n",
       YYDPRINTF ((stderr, "Stack %lu Entering state %d\n",

-                 (unsigned long int) yyk, yystate));
+                  (unsigned long int) yyk, yystate));

 
       YYASSERT (yystate != YYFINAL);
 
       if (yyisDefaultedState (yystate))
 
       YYASSERT (yystate != YYFINAL);
 
       if (yyisDefaultedState (yystate))

-       {
-         yyrule = yydefaultAction (yystate);
-         if (yyrule == 0)
-           {
-             YYDPRINTF ((stderr, "Stack %lu dies.\n",
-                         (unsigned long int) yyk));
-             yymarkStackDeleted (yystack, yyk);
-             return yyok;
-           }
-         YYCHK (yyglrReduce (yystack, yyk, yyrule, yyfalse]b4_user_args[));
-       }
+        {
+          YYRESULTTAG yyflag;
+          yyRuleNum yyrule = yydefaultAction (yystate);
+          if (yyrule == 0)
+            {
+              YYDPRINTF ((stderr, "Stack %lu dies.\n",
+                          (unsigned long int) yyk));
+              yymarkStackDeleted (yystackp, yyk);
+              return yyok;
+            }
+          yyflag = yyglrReduce (yystackp, yyk, yyrule, yyimmediate[yyrule]]b4_user_args[);
+          if (yyflag == yyerr)
+            {
+              YYDPRINTF ((stderr,
+                          "Stack %lu dies "
+                          "(predicate failure or explicit user error).\n",
+                          (unsigned long int) yyk));
+              yymarkStackDeleted (yystackp, yyk);
+              return yyok;
+            }
+          if (yyflag != yyok)
+            return yyflag;
+        }

       else
       else

-       {
-         if (*yytokenp == YYEMPTY)
-           {
-             YYDPRINTF ((stderr, "Reading a token: "));
-             yychar = YYLEX;
-             *yytokenp = YYTRANSLATE (yychar);
-             YY_SYMBOL_PRINT ("Next token is", *yytokenp, yylvalp, yyllocp);
-             YYDPRINTF ((stderr, "\n"));
-           }
-         yygetLRActions (yystate, *yytokenp, &yyaction, &yyconflicts);
-
-         while (*yyconflicts != 0)
-           {
-             size_t yynewStack = yysplitStack (yystack, yyk);
-             YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n",
-                         (unsigned long int) yynewStack,
-                         (unsigned long int) yyk));
-             YYCHK (yyglrReduce (yystack, yynewStack,
-                                 *yyconflicts, yyfalse]b4_user_args[));
-             YYCHK (yyprocessOneStack (yystack, yynewStack, yyposn,
-                                       yylvalp, yyllocp]b4_pure_args[));
-             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, ", now in state #%d\n",
-                         yystack->yytops.yystates[yyk]->yylrState));
-             break;
-           }
-         else if (yyisErrorAction (yyaction))
-           {
-             YYDPRINTF ((stderr, "Stack %lu dies.\n",
-                         (unsigned long int) yyk));
-             yymarkStackDeleted (yystack, yyk);
-             break;
-           }
-         else
-           YYCHK (yyglrReduce (yystack, yyk, -yyaction, yyfalse]b4_user_args[));
-       }
+        {
+          yySymbol yytoken;
+          int yyaction;
+          const short int* yyconflicts;
+
+          yystackp->yytops.yylookaheadNeeds[yyk] = yytrue;
+          if (yychar == YYEMPTY)
+            {
+              YYDPRINTF ((stderr, "Reading a token: "));
+              yychar = YYLEX;
+            }
+
+          if (yychar <= YYEOF)
+            {
+              yychar = yytoken = YYEOF;
+              YYDPRINTF ((stderr, "Now at end of input.\n"));
+            }
+          else
+            {
+              yytoken = YYTRANSLATE (yychar);
+              YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+            }
+
+          yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
+
+          while (*yyconflicts != 0)
+            {
+              YYRESULTTAG yyflag;
+              size_t yynewStack = yysplitStack (yystackp, yyk);
+              YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n",
+                          (unsigned long int) yynewStack,
+                          (unsigned long int) yyk));
+              yyflag = yyglrReduce (yystackp, yynewStack,
+                                    *yyconflicts,
+                                    yyimmediate[*yyconflicts]]b4_user_args[);
+              if (yyflag == yyok)
+                YYCHK (yyprocessOneStack (yystackp, yynewStack,
+                                          yyposn]b4_pure_args[));
+              else if (yyflag == yyerr)
+                {
+                  YYDPRINTF ((stderr, "Stack %lu dies.\n",
+                              (unsigned long int) yynewStack));
+                  yymarkStackDeleted (yystackp, yynewStack);
+                }
+              else
+                return yyflag;
+              yyconflicts += 1;
+            }
+
+          if (yyisShiftAction (yyaction))
+            break;
+          else if (yyisErrorAction (yyaction))
+            {
+              YYDPRINTF ((stderr, "Stack %lu dies.\n",
+                          (unsigned long int) yyk));
+              yymarkStackDeleted (yystackp, yyk);
+              break;
+            }
+          else
+            {
+              YYRESULTTAG yyflag = yyglrReduce (yystackp, yyk, -yyaction,
+                                                yyimmediate[-yyaction]]b4_user_args[);
+              if (yyflag == yyerr)
+                {
+                  YYDPRINTF ((stderr,
+                              "Stack %lu dies "
+                              "(predicate failure or explicit user error).\n",
+                              (unsigned long int) yyk));
+                  yymarkStackDeleted (yystackp, yyk);
+                  break;
+                }
+              else if (yyflag != yyok)
+                return yyflag;
+            }
+        }

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

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

 {
 {

-  /* `Unused' warnings. */
-  (void) yylvalp;
-  (void) yyllocp;
+  if (yystackp->yyerrState != 0)
+    return;
+#if ! YYERROR_VERBOSE
+  yyerror (]b4_lyyerror_args[YY_("syntax error"));
+#else
+  yySymbol yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
+  size_t yysize0 = yytnamerr (YY_NULL, yytokenName (yytoken));
+  size_t yysize = yysize0;
+  size_t yysize1;
+  yybool yysize_overflow = yyfalse;
+  char* yymsg = YY_NULL;
+  enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
+  /* Internationalized format string. */
+  const char *yyformat = YY_NULL;
+  /* Arguments of yyformat. */
+  char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
+  /* Number of reported tokens (one for the "unexpected", one per
+     "expected").  */
+  int yycount = 0;
+
+  /* There are many possibilities here to consider:
+     - If this state is a consistent state with a default action, then
+       the only way this function was invoked is if the default action
+       is an error action.  In that case, don't check for expected
+       tokens because there are none.
+     - The only way there can be no lookahead present (in yychar) is if
+       this state is a consistent state with a default action.  Thus,
+       detecting the absence of a lookahead is sufficient to determine
+       that there is no unexpected or expected token to report.  In that
+       case, just report a simple "syntax error".
+     - Don't assume there isn't a lookahead just because this state is a
+       consistent state with a default action.  There might have been a
+       previous inconsistent state, consistent state with a non-default
+       action, or user semantic action that manipulated yychar.
+     - Of course, the expected token list depends on states to have
+       correct lookahead information, and it depends on the parser not
+       to perform extra reductions after fetching a lookahead from the
+       scanner and before detecting a syntax error.  Thus, state merging
+       (from LALR or IELR) and default reductions corrupt the expected
+       token list.  However, the list is correct for canonical LR with
+       one exception: it will still contain any token that will not be
+       accepted due to an error action in a later state.
+  */
+  if (yytoken != YYEMPTY)
+    {
+      int yyn = yypact[yystackp->yytops.yystates[0]->yylrState];
+      yyarg[yycount++] = yytokenName (yytoken);
+      if (!yypact_value_is_default (yyn))
+        {
+          /* Start YYX at -YYN if negative to avoid negative indexes in
+             YYCHECK.  In other words, skip the first -YYN actions for this
+             state because they are default actions.  */
+          int yyxbegin = yyn < 0 ? -yyn : 0;
+          /* Stay within bounds of both yycheck and yytname.  */
+          int yychecklim = YYLAST - yyn + 1;
+          int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
+          int yyx;
+          for (yyx = yyxbegin; yyx < yyxend; ++yyx)
+            if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
+                && !yytable_value_is_error (yytable[yyx + yyn]))
+              {
+                if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
+                  {
+                    yycount = 1;
+                    yysize = yysize0;
+                    break;
+                  }
+                yyarg[yycount++] = yytokenName (yyx);
+                yysize1 = yysize + yytnamerr (YY_NULL, yytokenName (yyx));
+                yysize_overflow |= yysize1 < yysize;
+                yysize = yysize1;
+              }
+        }
+    }

 
 

-  if (yystack->yyerrState == 0)
+  switch (yycount)

     {
     {

-#if YYERROR_VERBOSE
-      yySymbol* const yytokenp = yystack->yytokenp;
-      int yyn;
-      yyn = yypact[yystack->yytops.yystates[0]->yylrState];
-      if (YYPACT_NINF < yyn && yyn < YYLAST)
-       {
-         size_t yysize0 = yytnamerr (NULL, yytokenName (*yytokenp));
-         size_t yysize = yysize0;
-         size_t yysize1;
-         yybool yysize_overflow = yyfalse;
-         char* yymsg = NULL;
-         enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
-         char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
-         int yyx;
-         char *yyfmt;
-         char const *yyf;
-         static char const yyunexpected[] = "syntax error, unexpected %s";
-         static char const yyexpecting[] = ", expecting %s";
-         static char const yyor[] = " or %s";
-         char yyformat[sizeof yyunexpected
-                       + sizeof yyexpecting - 1
-                       + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2)
-                          * (sizeof yyor - 1))];
-         char const *yyprefix = yyexpecting;
-
-         /* Start YYX at -YYN if negative to avoid negative indexes in
-            YYCHECK.  */
-         int yyxbegin = yyn < 0 ? -yyn : 0;
-
-         /* Stay within bounds of both yycheck and yytname.  */
-         int yychecklim = YYLAST - yyn;
-         int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
-         int yycount = 1;
-
-         yyarg[0] = yytokenName (*yytokenp);
-         yyfmt = yystpcpy (yyformat, yyunexpected);
-
-         for (yyx = yyxbegin; yyx < yyxend; ++yyx)
-           if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
-             {
-               if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
-                 {
-                   yycount = 1;
-                   yysize = yysize0;
-                   yyformat[sizeof yyunexpected - 1] = '\0';
-                   break;
-                 }
-               yyarg[yycount++] = yytokenName (yyx);
-               yysize1 = yysize + yytnamerr (NULL, yytokenName (yyx));
-               yysize_overflow |= yysize1 < yysize;
-               yysize = yysize1;
-               yyfmt = yystpcpy (yyfmt, yyprefix);
-               yyprefix = yyor;
-             }
-
-         yyf = YY_(yyformat);
-         yysize1 = yysize + strlen (yyf);
-         yysize_overflow |= yysize1 < yysize;
-         yysize = yysize1;
-
-         if (!yysize_overflow)
-           yymsg = (char *) YYMALLOC (yysize);
-
-         if (yymsg)
-           {
-             char *yyp = yymsg;
-             int yyi = 0;
-             while ((*yyp = *yyf))
-               {
-                 if (*yyp == '%' && yyf[1] == 's' && yyi < yycount)
-                   {
-                     yyp += yytnamerr (yyp, yyarg[yyi++]);
-                     yyf += 2;
-                   }
-                 else
-                   {
-                     yyp++;
-                     yyf++;
-                   }
-               }
-             yyerror (]b4_lyyerror_args[yymsg);
-             YYFREE (yymsg);
-           }
-         else
-           {
-             yyerror (]b4_lyyerror_args[YY_("syntax error"));
-             yyMemoryExhausted (yystack);
-           }
-       }
-      else
-#endif /* YYERROR_VERBOSE */
-       yyerror (]b4_lyyerror_args[YY_("syntax error"));
-      yynerrs += 1;
+#define YYCASE_(N, S)                   \
+      case N:                           \
+        yyformat = S;                   \
+      break
+      YYCASE_(0, YY_("syntax error"));
+      YYCASE_(1, YY_("syntax error, unexpected %s"));
+      YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
+      YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
+      YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
+      YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
+#undef YYCASE_

     }
     }

+
+  yysize1 = yysize + strlen (yyformat);
+  yysize_overflow |= yysize1 < yysize;
+  yysize = yysize1;
+
+  if (!yysize_overflow)
+    yymsg = (char *) YYMALLOC (yysize);
+
+  if (yymsg)
+    {
+      char *yyp = yymsg;
+      int yyi = 0;
+      while ((*yyp = *yyformat))
+        {
+          if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
+            {
+              yyp += yytnamerr (yyp, yyarg[yyi++]);
+              yyformat += 2;
+            }
+          else
+            {
+              yyp++;
+              yyformat++;
+            }
+        }
+      yyerror (]b4_lyyerror_args[yymsg);
+      YYFREE (yymsg);
+    }
+  else
+    {
+      yyerror (]b4_lyyerror_args[YY_("syntax error"));
+      yyMemoryExhausted (yystackp);
+    }
+#endif /* YYERROR_VERBOSE */
+  yynerrs += 1;

 }
 
 }
 

-/* 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.  */
+/* Recover from a syntax error on *YYSTACKP, assuming that *YYSTACKP->YYTOKENP,
+   yylval, and yylloc are the syntactic category, semantic value, and location
+   of the lookahead.  */

 static void
 static void

-yyrecoverSyntaxError (yyGLRStack* yystack,
-                     YYSTYPE* yylvalp,
-                     YYLTYPE* YYOPTIONAL_LOC (yyllocp)
-                     ]b4_user_formals[)
+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.  */
     while (yytrue)
       {
     /* We just shifted the error token and (perhaps) took some
        reductions.  Skip tokens until we can proceed.  */
     while (yytrue)
       {

-       if (*yytokenp == YYEOF)
-         yyFail (yystack][]b4_lpure_args[, NULL);
-       if (*yytokenp != YYEMPTY)
-         {]b4_location_if([[
-           /* We throw away the lookahead, but the error range
-              of the shifted error token must take it into account. */
-           yyGLRState *yys = yystack->yytops.yystates[0];
-           yyGLRStackItem yyerror_range[3];
-           yyerror_range[1].yystate.yyloc = yys->yyloc;
-           yyerror_range[2].yystate.yyloc = *yyllocp;
-           YYLLOC_DEFAULT (yys->yyloc, yyerror_range, 2);]])[
-           yydestruct ("Error: discarding",
-                       *yytokenp, yylvalp]b4_location_if([, yyllocp])[);
-         }
-       YYDPRINTF ((stderr, "Reading a token: "));
-       yychar = YYLEX;
-       *yytokenp = YYTRANSLATE (yychar);
-       YY_SYMBOL_PRINT ("Next token is", *yytokenp, yylvalp, yyllocp);
-       YYDPRINTF ((stderr, "\n"));
-       yyj = yypact[yystack->yytops.yystates[0]->yylrState];
-       if (yyis_pact_ninf (yyj))
-         return;
-       yyj += *yytokenp;
-       if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != *yytokenp)
-         {
-           if (yydefact[yystack->yytops.yystates[0]->yylrState] != 0)
-             return;
-         }
-       else if (yytable[yyj] != 0 && ! yyis_table_ninf (yytable[yyj]))
-         return;
+        yySymbol yytoken;
+        if (yychar == YYEOF)
+          yyFail (yystackp][]b4_lpure_args[, YY_NULL);
+        if (yychar != YYEMPTY)
+          {]b4_locations_if([[
+            /* We throw away the lookahead, but the error range
+               of the shifted error token must take it into account.  */
+            yyGLRState *yys = yystackp->yytops.yystates[0];
+            yyGLRStackItem yyerror_range[3];
+            yyerror_range[1].yystate.yyloc = yys->yyloc;
+            yyerror_range[2].yystate.yyloc = yylloc;
+            YYLLOC_DEFAULT ((yys->yyloc), yyerror_range, 2);]])[
+            yytoken = YYTRANSLATE (yychar);
+            yydestruct ("Error: discarding",
+                        yytoken, &yylval]b4_locuser_args([&yylloc])[);
+          }
+        YYDPRINTF ((stderr, "Reading a token: "));
+        yychar = YYLEX;
+        if (yychar <= YYEOF)
+          {
+            yychar = yytoken = YYEOF;
+            YYDPRINTF ((stderr, "Now at end of input.\n"));
+          }
+        else
+          {
+            yytoken = YYTRANSLATE (yychar);
+            YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+          }
+        yyj = yypact[yystackp->yytops.yystates[0]->yylrState];
+        if (yypact_value_is_default (yyj))
+          return;
+        yyj += yytoken;
+        if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != yytoken)
+          {
+            if (yydefact[yystackp->yytops.yystates[0]->yylrState] != 0)
+              return;
+          }
+        else if (! yytable_value_is_error (yytable[yyj]))
+          return;

       }
 
   /* 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] != YY_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[, YY_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] != YY_NULL)

     {
     {

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

       yyj = yypact[yys->yylrState];
       yyj = yypact[yys->yylrState];

-      if (! yyis_pact_ninf (yyj))
-       {
-         yyj += YYTERROR;
-         if (0 <= yyj && yyj <= YYLAST && yycheck[yyj] == YYTERROR
-             && yyisShiftAction (yytable[yyj]))
-           {
-             /* Shift the error token having adjusted its location.  */
-             YYLTYPE yyerrloc;]b4_location_if([[
-             yystack->yyerror_range[2].yystate.yyloc = *yyllocp;
-             YYLLOC_DEFAULT (yyerrloc, yystack->yyerror_range, 2);]])[
-             YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]],
-                              yylvalp, &yyerrloc);
-             YYDPRINTF ((stderr, "\n"));
-             yyglrShift (yystack, 0, yytable[yyj],
-                         yys->yyposn, *yylvalp, &yyerrloc);
-             yys = yystack->yytops.yystates[0];
-             break;
-           }
-       }
-]b4_location_if([[      yystack->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
-      yydestruct ("Error: popping",
-                 yystos[yys->yylrState],
-                 &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[);
-      yystack->yytops.yystates[0] = yys->yypred;
-      yystack->yynextFree -= 1;
-      yystack->yyspaceLeft += 1;
+      if (! yypact_value_is_default (yyj))
+        {
+          yyj += YYTERROR;
+          if (0 <= yyj && yyj <= YYLAST && yycheck[yyj] == YYTERROR
+              && yyisShiftAction (yytable[yyj]))
+            {
+              /* Shift the error token.  */]b4_locations_if([[
+              /* First adjust its location.*/
+              YYLTYPE yyerrloc;
+              yystackp->yyerror_range[2].yystate.yyloc = yylloc;
+              YYLLOC_DEFAULT (yyerrloc, (yystackp->yyerror_range), 2);]])[
+              YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]],
+                               &yylval, &yyerrloc);
+              yyglrShift (yystackp, 0, yytable[yyj],
+                          yys->yyposn, &yylval]b4_locations_if([, &yyerrloc])[);
+              yys = yystackp->yytops.yystates[0];
+              break;
+            }
+        }]b4_locations_if([[
+      yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
+      if (yys->yypred != YY_NULL)
+        yydestroyGLRState ("Error: popping", yys]b4_user_args[);
+      yystackp->yytops.yystates[0] = yys->yypred;
+      yystackp->yynextFree -= 1;
+      yystackp->yyspaceLeft += 1;

     }
     }

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

 }
 
 }
 

-#define YYCHK1(YYE)                                                         \
-  do {                                                                      \
-    switch (YYE) {                                                          \
-    default:                                                                \
-      break;                                                                \
-    case yyabort:                                                           \
-      goto yyabortlab;                                                      \
-    case yyaccept:                                                          \
-      goto yyacceptlab;                                                             \
-    case yyerr:                                                                     \
-      goto yyuser_error;                                                    \
-    }                                                                       \
+#define YYCHK1(YYE)                                                          \
+  do {                                                                       \
+    switch (YYE) {                                                           \
+    case yyok:                                                               \
+      break;                                                                 \
+    case yyabort:                                                            \
+      goto yyabortlab;                                                       \
+    case yyaccept:                                                           \
+      goto yyacceptlab;                                                      \
+    case yyerr:                                                              \
+      goto yyuser_error;                                                     \
+    default:                                                                 \
+      goto yybuglab;                                                         \
+    }                                                                        \

   } while (0)
 
   } while (0)
 

-

 /*----------.
 | yyparse.  |
 `----------*/
 
 /*----------.
 | yyparse.  |
 `----------*/
 

-]b4_c_ansi_function_def([yyparse], [int], b4_parse_param)[
+]b4_function_define([yyparse], [int], b4_parse_param)[

 {
   int yyresult;
 {
   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"));
 
 
   YYDPRINTF ((stderr, "Starting parse\n"));
 

-  yytoken = YYEMPTY;
+  yychar = YYEMPTY;

   yylval = yyval_default;
   yylval = yyval_default;

-]b4_location_if([
-#if YYLTYPE_IS_TRIVIAL
-  yylloc.first_line   = yylloc.last_line   = 1;
-  yylloc.first_column = yylloc.last_column = 0;
+]b4_locations_if([
+#if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL
+  yylloc.first_line   = yylloc.last_line   = ]b4_location_initial_line[;
+  yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;

 #endif
 ])
 m4_ifdef([b4_initial_action], [
 #endif
 ])
 m4_ifdef([b4_initial_action], [

-m4_pushdef([b4_at_dollar],     [yylloc])dnl
-m4_pushdef([b4_dollar_dollar], [yylval])dnl
-  /* User initialization code. */
-  b4_initial_action
-m4_popdef([b4_dollar_dollar])dnl
-m4_popdef([b4_at_dollar])dnl
-/* Line __line__ of glr.c.  */
-b4_syncline([@oline@], [@ofile@])])dnl
+b4_dollar_pushdef([yylval], [], [yylloc])dnl
+  /* User initialization code.  */
+  b4_user_initial_action
+b4_dollar_popdef])[]dnl

 [
 [

-  if (! yyinitGLRStack (&yystack, YYINITDEPTH))
+  if (! yyinitGLRStack (yystackp, YYINITDEPTH))

     goto yyexhaustedlab;
     goto yyexhaustedlab;

-  switch (setjmp (yystack.yyexception_buffer))
+  switch (YYSETJMP (yystack.yyexception_buffer))

     {
     {

+    case 0: break;

     case 1: goto yyabortlab;
     case 2: goto yyexhaustedlab;
     case 1: goto yyabortlab;
     case 2: goto yyexhaustedlab;

+    default: goto yybuglab;

     }
     }

-  yystack.yytokenp = &yytoken;
-  yyglrShift (&yystack, 0, 0, 0, yylval, &yylloc);
+  yyglrShift (&yystack, 0, 0, 0, &yylval]b4_locations_if([, &yylloc])[);

   yyposn = 0;
 
   while (yytrue)
     {
       /* For efficiency, we have two loops, the first of which is
   yyposn = 0;
 
   while (yytrue)
     {
       /* For efficiency, we have two loops, the first of which is

-        specialized to deterministic operation (single stack, no
-        potential ambiguity).  */
+         specialized to deterministic operation (single stack, no
+         potential ambiguity).  */

       /* Standard mode */
       while (yytrue)
       /* Standard mode */
       while (yytrue)

-       {
-         yyRuleNum yyrule;
-         int yyaction;
-         const short int* yyconflicts;
+        {
+          yyRuleNum yyrule;
+          int yyaction;
+          const short int* yyconflicts;

 
 

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

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

-         if (yystate == YYFINAL)
-           goto yyacceptlab;
-         if (yyisDefaultedState (yystate))
-           {
-             yyrule = yydefaultAction (yystate);
-             if (yyrule == 0)
-               {
-]b4_location_if([[               yystack.yyerror_range[1].yystate.yyloc = *yyllocp;]])[
-                 yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
-                 goto yyuser_error;
-               }
-             YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue]b4_user_args[));
-           }
-         else
-           {
-             if (yytoken == YYEMPTY)
-               {
-                 YYDPRINTF ((stderr, "Reading a token: "));
-                 yychar = YYLEX;
-                 yytoken = YYTRANSLATE (yychar);
-                  YY_SYMBOL_PRINT ("Next token is", yytoken, yylvalp, yyllocp);
-                  YYDPRINTF ((stderr, "\n"));
-               }
-             yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
-             if (*yyconflicts != 0)
-               break;
-             if (yyisShiftAction (yyaction))
-               {
-                 YY_SYMBOL_PRINT ("Shifting", yytoken, yylvalp, yyllocp);
-                 YYDPRINTF ((stderr, "\n"));
-                 if (yytoken != YYEOF)
-                   yytoken = YYEMPTY;
-                 yyposn += 1;
-                 yyglrShift (&yystack, 0, yyaction, yyposn, yylval, yyllocp);
-                 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[);
-                 goto yyuser_error;
-               }
-             else
-               YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue]b4_user_args[));
-           }
-       }
+          if (yystate == YYFINAL)
+            goto yyacceptlab;
+          if (yyisDefaultedState (yystate))
+            {
+              yyrule = yydefaultAction (yystate);
+              if (yyrule == 0)
+                {
+]b4_locations_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
+            {
+              yySymbol yytoken;
+              if (yychar == YYEMPTY)
+                {
+                  YYDPRINTF ((stderr, "Reading a token: "));
+                  yychar = YYLEX;
+                }
+
+              if (yychar <= YYEOF)
+                {
+                  yychar = yytoken = YYEOF;
+                  YYDPRINTF ((stderr, "Now at end of input.\n"));
+                }
+              else
+                {
+                  yytoken = YYTRANSLATE (yychar);
+                  YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+                }
+
+              yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
+              if (*yyconflicts != 0)
+                break;
+              if (yyisShiftAction (yyaction))
+                {
+                  YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
+                  yychar = YYEMPTY;
+                  yyposn += 1;
+                  yyglrShift (&yystack, 0, yyaction, yyposn, &yylval]b4_locations_if([, &yylloc])[);
+                  if (0 < yystack.yyerrState)
+                    yystack.yyerrState -= 1;
+                }
+              else if (yyisErrorAction (yyaction))
+                {
+]b4_locations_if([[               yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+                  yyreportSyntaxError (&yystack]b4_user_args[);
+                  goto yyuser_error;
+                }
+              else
+                YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue]b4_user_args[));
+            }
+        }

 
       while (yytrue)
 
       while (yytrue)

-       {
-         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;
-         yyremoveDeletes (&yystack);
-         if (yystack.yytops.yysize == 0)
-           {
-             yyundeleteLastStack (&yystack);
-             if (yystack.yytops.yysize == 0)
-               yyFail (&yystack][]b4_lpure_args[, YY_("syntax error"));
-             YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
-             YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
-]b4_location_if([[           yystack.yyerror_range[1].yystate.yyloc = *yyllocp;]])[
-             yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[);
-             goto yyuser_error;
-           }
-         else if (yystack.yytops.yysize == 1)
-           {
-             YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
-             YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
-             yycompressStack (&yystack);
-             break;
-           }
-       }
+        {
+          yySymbol yytoken_to_shift;
+          size_t yys;
+
+          for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
+            yystackp->yytops.yylookaheadNeeds[yys] = yychar != YYEMPTY;
+
+          /* yyprocessOneStack returns one of three things:
+
+              - An error flag.  If the caller is yyprocessOneStack, it
+                immediately returns as well.  When the caller is finally
+                yyparse, it jumps to an error label via YYCHK1.
+
+              - yyok, but yyprocessOneStack has invoked yymarkStackDeleted
+                (&yystack, yys), which sets the top state of yys to NULL.  Thus,
+                yyparse's following invocation of yyremoveDeletes will remove
+                the stack.
+
+              - yyok, when ready to shift a token.
+
+             Except in the first case, yyparse will invoke yyremoveDeletes and
+             then shift the next token onto all remaining stacks.  This
+             synchronization of the shift (that is, after all preceding
+             reductions on all stacks) helps prevent double destructor calls
+             on yylval in the event of memory exhaustion.  */
+
+          for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
+            YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn]b4_lpure_args[));
+          yyremoveDeletes (&yystack);
+          if (yystack.yytops.yysize == 0)
+            {
+              yyundeleteLastStack (&yystack);
+              if (yystack.yytops.yysize == 0)
+                yyFail (&yystack][]b4_lpure_args[, YY_("syntax error"));
+              YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
+              YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
+]b4_locations_if([[           yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+              yyreportSyntaxError (&yystack]b4_user_args[);
+              goto yyuser_error;
+            }
+
+          /* 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]b4_locations_if([, &yylloc])[);
+              YYDPRINTF ((stderr, "Stack %lu now in state #%d\n",
+                          (unsigned long int) yys,
+                          yystack.yytops.yystates[yys]->yylrState));
+            }
+
+          if (yystack.yytops.yysize == 1)
+            {
+              YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
+              YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
+              yycompressStack (&yystack);
+              break;
+            }
+        }

       continue;
     yyuser_error:
       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;
     }
 


@@ -2140,6 +2458,10 @@ b4_syncline([@oline@], [@ofile@])])dnl
   yyresult = 0;
   goto yyreturn;
 
   yyresult = 0;
   goto yyreturn;
 

+ yybuglab:
+  YYASSERT (yyfalse);
+  goto yyabortlab;
+

  yyabortlab:
   yyresult = 1;
   goto yyreturn;
  yyabortlab:
   yyresult = 1;
   goto yyreturn;


@@ -2147,38 +2469,50 @@ 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)
-    yydestruct ("Error: discarding lookahead",
-                yytoken, yylvalp]b4_location_if([, yyllocp])[);
-
-  /* Now pop stack until empty, destroying its entries as we go.  */
-  {
-    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;]]
-)[       yydestruct ("Error: popping",
-                     yystos[yys->yylrState],
-                     &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[);
-         yystates[0] = yys->yypred;
-         yystack.yynextFree -= 1;
-         yystack.yyspaceLeft += 1;
-       }
-  }
+  if (yychar != YYEMPTY)
+    yydestruct ("Cleanup: discarding lookahead",
+                YYTRANSLATE (yychar), &yylval]b4_locuser_args([&yylloc])[);
+
+  /* If the stack is well-formed, pop the stack until it is empty,
+     destroying its entries as we go.  But free the stack regardless
+     of whether it is well-formed.  */
+  if (yystack.yyitems)
+    {
+      yyGLRState** yystates = yystack.yytops.yystates;
+      if (yystates)
+        {
+          size_t yysize = yystack.yytops.yysize;
+          size_t yyk;
+          for (yyk = 0; yyk < yysize; yyk += 1)
+            if (yystates[yyk])
+              {
+                while (yystates[yyk])
+                  {
+                    yyGLRState *yys = yystates[yyk];
+]b4_locations_if([[                 yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
+)[                  if (yys->yypred != YY_NULL)
+                      yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
+                    yystates[yyk] = yys->yypred;
+                    yystack.yynextFree -= 1;
+                    yystack.yyspaceLeft += 1;
+                  }
+                break;
+              }
+        }
+      yyfreeGLRStack (&yystack);
+    }

 
 

-  yyfreeGLRStack (&yystack);

   return yyresult;
 }
 
 /* DEBUGGING ONLY */
   return yyresult;
 }
 
 /* DEBUGGING ONLY */

-#ifdef YYDEBUG
-static void yypstack (yyGLRStack* yystack, size_t yyk) ATTRIBUTE_UNUSED;
-static void yypdumpstack (yyGLRStack* yystack) ATTRIBUTE_UNUSED;
+#if ]b4_api_PREFIX[DEBUG
+static void yypstack (yyGLRStack* yystackp, size_t yyk)
+  __attribute__ ((__unused__));
+static void yypdumpstack (yyGLRStack* yystackp) __attribute__ ((__unused__));

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


@@ -2186,106 +2520,80 @@ yy_yypstack (yyGLRState* yys)
   if (yys->yypred)
     {
       yy_yypstack (yys->yypred);
   if (yys->yypred)
     {
       yy_yypstack (yys->yypred);

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

     }
     }

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

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

-  if (yyst == NULL)
-    fprintf (stderr, "<null>");
+  if (yyst == YY_NULL)
+    YYFPRINTF (stderr, "<null>");

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

-  fprintf (stderr, "\n");
+  YYFPRINTF (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)                                                        \
-    ((YYX) == NULL ? -1 : (yyGLRStackItem*) (YYX) - yystack->yyitems)
+#define YYINDEX(YYX)                                                         \
+    ((YYX) == YY_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));
+      YYFPRINTF (stderr, "%3lu. ",
+                 (unsigned long int) (yyp - yystackp->yyitems));

       if (*(yybool *) yyp)
       if (*(yybool *) yyp)

-       {
-         fprintf (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
-                  yyp->yystate.yyresolved, yyp->yystate.yylrState,
-                  (unsigned long int) yyp->yystate.yyposn,
-                  (long int) YYINDEX (yyp->yystate.yypred));
-         if (! yyp->yystate.yyresolved)
-           fprintf (stderr, ", firstVal: %ld",
-                    (long int) YYINDEX (yyp->yystate.yysemantics.yyfirstVal));
-       }
+        {
+          YYFPRINTF (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
+                     yyp->yystate.yyresolved, yyp->yystate.yylrState,
+                     (unsigned long int) yyp->yystate.yyposn,
+                     (long int) YYINDEX (yyp->yystate.yypred));
+          if (! yyp->yystate.yyresolved)
+            YYFPRINTF (stderr, ", firstVal: %ld",
+                       (long int) YYINDEX (yyp->yystate
+                                             .yysemantics.yyfirstVal));
+        }

       else
       else

-       {
-         fprintf (stderr, "Option. rule: %d, state: %ld, next: %ld",
-                  yyp->yyoption.yyrule,
-                  (long int) YYINDEX (yyp->yyoption.yystate),
-                  (long int) YYINDEX (yyp->yyoption.yynext));
-       }
-      fprintf (stderr, "\n");
+        {
+          YYFPRINTF (stderr, "Option. rule: %d, state: %ld, next: %ld",
+                     yyp->yyoption.yyrule - 1,
+                     (long int) YYINDEX (yyp->yyoption.yystate),
+                     (long int) YYINDEX (yyp->yyoption.yynext));
+        }
+      YYFPRINTF (stderr, "\n");

     }
     }

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

 }
 #endif
 }
 #endif

-]
-
-b4_epilogue
-m4_if(b4_defines_flag, 0, [],
-[@output @output_header_name@
-b4_copyright([Skeleton parser for GLR parsing with Bison],
-  [2002, 2003, 2004, 2005])
-
-b4_token_defines(b4_tokens)
-
-#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
-m4_ifdef([b4_stype],
-[b4_syncline([b4_stype_line], [b4_filename])
-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
-
-b4_pure_if([],
-[extern YYSTYPE b4_prefix[]lval;])
-
-#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
-
-b4_location_if([b4_pure_if([],
-[extern YYLTYPE b4_prefix[]lloc;])
-])
-])
+]b4_epilogue[]dnl
+dnl
+dnl glr.cc produces its own header.
+dnl
+m4_if(b4_skeleton, ["glr.c"],
+[b4_defines_if(
+[@output(b4_spec_defines_file@)@
+b4_copyright([Skeleton interface for Bison GLR parsers in C],
+             [2002-2012])[
+
+]b4_cpp_guard_open([b4_spec_defines_file])[
+]b4_shared_declarations[
+]b4_cpp_guard_close([b4_spec_defines_file])[
+]])])dnl
+m4_divert_pop(0)