version 3.0.4

[bison.git] / data / glr.c

diff --git a/data/glr.c b/data/glr.c
index 9bd95228da6e0615a627d416f338f7b6b54a1e4e..2b074cd279b781069d01344bb7ce12ecaa4f35b3 100644 (file)
--- a/data/glr.c
+++ b/data/glr.c
@@ -2,7 +2,7 @@
 
 # GLR skeleton for Bison
 
 
 # GLR skeleton for Bison
 

-# Copyright (C) 2002-2012 Free Software Foundation, Inc.
+# Copyright (C) 2002-2015 Free Software Foundation, Inc.

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


@@ -52,17 +52,7 @@ m4_ifndef([b4_pure_flag],
 # This is not shared with yacc.c in c.m4 because  GLR relies on ISO C
 # formal argument declarations.
 m4_define([b4_user_formals],
 # This is not shared with yacc.c in c.m4 because  GLR relies on ISO C
 # formal argument declarations.
 m4_define([b4_user_formals],

-[m4_ifset([b4_parse_param], [, b4_c_ansi_formals(b4_parse_param)])])
-
-
-# b4_lex_param
-# ------------
-# Accumule in b4_lex_param all the yylex arguments.
-# Yes, this is quite ugly...
-m4_define([b4_lex_param],
-m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
-b4_locations_if([, [[YYLTYPE *], [&yylloc]]])])dnl
-m4_ifdef([b4_lex_param], [, ]b4_lex_param)))
+[m4_ifset([b4_parse_param], [, b4_formals(b4_parse_param)])])

 
 
 # b4_yyerror_args
 
 
 # b4_yyerror_args


@@ -71,7 +61,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)))
 # a trailing comma.
 m4_define([b4_yyerror_args],
 [b4_pure_if([b4_locations_if([yylocp, ])])dnl
 # a trailing comma.
 m4_define([b4_yyerror_args],
 [b4_pure_if([b4_locations_if([yylocp, ])])dnl

-m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
+m4_ifset([b4_parse_param], [b4_args(b4_parse_param), ])])

 
 
 # b4_lyyerror_args
 
 
 # b4_lyyerror_args


@@ -79,7 +69,7 @@ m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
 # Same as above, but on the lookahead, hence &yylloc instead of yylocp.
 m4_define([b4_lyyerror_args],
 [b4_pure_if([b4_locations_if([&yylloc, ])])dnl
 # Same as above, but on the lookahead, hence &yylloc instead of yylocp.
 m4_define([b4_lyyerror_args],
 [b4_pure_if([b4_locations_if([&yylloc, ])])dnl

-m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
+m4_ifset([b4_parse_param], [b4_args(b4_parse_param), ])])

 
 
 # b4_pure_args
 
 
 # b4_pure_args


@@ -126,7 +116,15 @@ m4_define([b4_locuser_args],
 # --------------------
 # 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])


@@ -134,7 +132,7 @@ 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 (($2) - ($1))@}.yystate.yysemantics.yysval[]m4_ifval([$3], [.$3]))])
+[b4_symbol_value([b4_rhs_data([$1], [$2]).yysemantics.yysval], [$3])])

 
 
 
 
 
 


@@ -154,7 +152,7 @@ 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 (($2) - ($1))@}.yystate.yyloc)])
+[(b4_rhs_data([$1], [$2]).yyloc)])

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


@@ -164,28 +162,59 @@ m4_define([b4_rhs_location],
 # b4_shared_declarations
 # ----------------------
 # Declaration that might either go into the header (if --defines)
 # b4_shared_declarations
 # ----------------------
 # Declaration that might either go into the header (if --defines)

-# or open coded in the parser body.
-m4_define([b4_shared_declarations],
+# 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_declare_yydebug[
 ]b4_percent_code_get([[requires]])[

-]b4_token_enums(b4_tokens)[
+]b4_token_enums[

 ]b4_declare_yylstype[
 ]b4_declare_yylstype[

-]b4_c_ansi_function_decl(b4_prefix[parse], [int], b4_parse_param)[
+]b4_function_declare(b4_prefix[parse], [int], b4_parse_param)[

 ]b4_percent_code_get([[provides]])[]dnl
 ])
 ]b4_percent_code_get([[provides]])[]dnl
 ])

-
+])

 
 ## -------------- ##
 ## Output files.  ##
 ## -------------- ##
 
 
 ## -------------- ##
 ## Output files.  ##
 ## -------------- ##
 

-# We do want M4 expansion after # for CPP macros.
-m4_changecom()
-m4_divert_push(0)dnl
-@output(b4_parser_file_name@)@
+# Unfortunately the order of generation between the header and the
+# implementation file matters (for glr.c) because of the current
+# implementation of api.value.type=union.  In that case we still use a
+# union for YYSTYPE, but we generate the contents of this union when
+# setting up YYSTYPE.  This is needed for other aspects, such as
+# defining yy_symbol_value_print, since we need to now the name of the
+# members of this union.
+#
+# To avoid this issue, just generate the header before the
+# implementation file.  But we should also make them more independant.
+
+# ----------------- #
+# The header file.  #
+# ----------------- #
+
+# glr.cc produces its own header.
+m4_if(b4_skeleton, ["glr.c"],
+[b4_defines_if(
+[b4_output_begin([b4_spec_defines_file])
+b4_copyright([Skeleton interface for Bison GLR parsers in C],
+             [2002-2015])[
+
+]b4_cpp_guard_open([b4_spec_defines_file])[
+]b4_shared_declarations[
+]b4_cpp_guard_close([b4_spec_defines_file])[
+]b4_output_end()
+])])
+
+
+# ------------------------- #
+# The implementation file.  #
+# ------------------------- #
+
+b4_output_begin([b4_parser_file_name])

 b4_copyright([Skeleton implementation for Bison GLR parsers in C],
 b4_copyright([Skeleton implementation for Bison GLR parsers in C],

-             [2002-2012])
-[
+             [2002-2015])[
+

 /* C GLR parser skeleton written by Paul Hilfinger.  */
 
 ]b4_identification
 /* C GLR parser skeleton written by Paul Hilfinger.  */
 
 ]b4_identification


@@ -200,13 +229,14 @@ b4_percent_code_get([[top]])[
 #define yyparse ]b4_prefix[parse
 #define yylex   ]b4_prefix[lex
 #define yyerror ]b4_prefix[error
 #define yyparse ]b4_prefix[parse
 #define yylex   ]b4_prefix[lex
 #define yyerror ]b4_prefix[error

+#define yydebug ]b4_prefix[debug
+]]b4_pure_if([], [[

 #define yylval  ]b4_prefix[lval
 #define yychar  ]b4_prefix[char
 #define yylval  ]b4_prefix[lval
 #define yychar  ]b4_prefix[char

-#define yydebug ]b4_prefix[debug

 #define yynerrs ]b4_prefix[nerrs]b4_locations_if([[
 #define yynerrs ]b4_prefix[nerrs]b4_locations_if([[

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

 
 

-/* Copy the first part of user declarations.  */
+/* First part of user declarations.  */

 ]b4_user_pre_prologue[
 
 ]b4_null_define[
 ]b4_user_pre_prologue[
 
 ]b4_null_define[


@@ -219,7 +249,7 @@ b4_percent_code_get([[top]])[
 # undef YYERROR_VERBOSE
 # define YYERROR_VERBOSE 1
 #else
 # undef YYERROR_VERBOSE
 # define YYERROR_VERBOSE 1
 #else

-# define YYERROR_VERBOSE ]b4_error_verbose_flag[
+# define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[

 #endif
 
 /* Default (constant) value used for initialization for null
 #endif
 
 /* Default (constant) value used for initialization for null


@@ -249,23 +279,6 @@ b4_percent_code_get[]dnl
 # endif
 #endif
 
 # endif
 #endif
 

-/* Suppress unused-variable warnings by "using" E.  */
-#if ! defined lint || defined __GNUC__
-# define YYUSE(E) ((void) (E))
-#else
-# define YYUSE(E) /* empty */
-#endif
-
-/* Identity function, used to suppress warnings about constant conditions.  */
-#ifndef lint
-# define YYID(N) (N)
-#else
-]b4_c_function_def([YYID], [static int], [[int i], [i]])[
-{
-  return i;
-}
-#endif
-

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


@@ -290,28 +303,11 @@ b4_percent_code_get[]dnl
 # include <setjmp.h>
 # define YYJMP_BUF jmp_buf
 # define YYSETJMP(Env) setjmp (Env)
 # include <setjmp.h>
 # define YYJMP_BUF jmp_buf
 # define YYSETJMP(Env) setjmp (Env)

-// Pacify clang.
+/* Pacify clang.  */

 # define YYLONGJMP(Env, Val) (longjmp (Env, Val), YYASSERT (0))
 #endif
 
 # 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.  */
-# if (! defined __GNUC__ || __GNUC__ < 2 \
-      || (__GNUC__ == 2 && __GNUC_MINOR__ < 5))
-#  define __attribute__(Spec) /* empty */
-# endif
-#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])[
+]b4_attribute_define[

 
 #ifndef YYASSERT
 # define YYASSERT(Condition) ((void) ((Condition) || (abort (), 0)))
 
 #ifndef YYASSERT
 # define YYASSERT(Condition) ((void) ((Condition) || (abort (), 0)))


@@ -350,19 +346,6 @@ static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
 };
 
 #if ]b4_api_PREFIX[DEBUG
 };
 
 #if ]b4_api_PREFIX[DEBUG

-/* 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[
-};
-

 /* 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[] =
 {


@@ -379,17 +362,10 @@ static const char *const yytname[] =
 };
 #endif
 
 };
 #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).  */
 static const ]b4_int_type_for([b4_dprec])[ yydprec[] =
 
 /* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none).  */
 static const ]b4_int_type_for([b4_dprec])[ yydprec[] =


@@ -403,41 +379,11 @@ static const ]b4_int_type_for([b4_merger])[ yymerger[] =
   ]b4_merger[
 };
 
   ]b4_merger[
 };
 

-/* YYDEFACT[S] -- default reduction number in state S.  Performed when
-   YYTABLE doesn't specify something else to do.  Zero means the default
-   is an error.  */
-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[] =
-{
-  ]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 YYTABLE_NINF, syntax error.  */
-#define YYTABLE_NINF ]b4_table_ninf[
-static const ]b4_int_type_for([b4_table])[ yytable[] =
+/* YYIMMEDIATE[RULE-NUM] -- True iff rule #RULE-NUM is not to be deferred, as
+   in the case of predicates.  */
+static const yybool yyimmediate[] =

 {
 {

-  ]b4_table[
+  ]b4_immediate[

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


@@ -452,25 +398,13 @@ static const ]b4_int_type_for([b4_conflict_list_heads])[ yyconflp[] =
 /* YYCONFL[I] -- lists of conflicting rule numbers, each terminated by
    0, pointed into by YYCONFLP.  */
 ]dnl Do not use b4_int_type_for here, since there are places where
 /* YYCONFL[I] -- lists of conflicting rule numbers, each terminated by
    0, pointed into by YYCONFLP.  */
 ]dnl Do not use b4_int_type_for here, since there are places where

-dnl pointers onto yyconfl are taken, which type is "short int *".
+dnl pointers onto yyconfl are taken, whose type is "short int *".

 dnl We probably ought to introduce a type for confl.
 [static const short int yyconfl[] =
 {
   ]b4_conflicting_rules[
 };
 
 dnl We probably ought to introduce a type for confl.
 [static const short int yyconfl[] =
 {
   ]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[
-};
-

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


@@ -478,10 +412,6 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] =
 ]b4_yylloc_default_define[
 # define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
 ]])[
 ]b4_yylloc_default_define[
 # define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
 ]])[

-]b4_yy_location_print_define[
-
-/* YYLEX -- calling `yylex' with the right arguments.  */
-#define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[

 
 ]b4_pure_if(
 [
 
 ]b4_pure_if(
 [


@@ -509,9 +439,12 @@ 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 (YYID (0))
+#define YYCHK(YYE)                              \
+  do {                                          \
+    YYRESULTTAG yychk_flag = YYE;               \
+    if (yychk_flag != yyok)                     \
+      return yychk_flag;                        \
+  } while (0)

 
 #if ]b4_api_PREFIX[DEBUG
 
 
 #if ]b4_api_PREFIX[DEBUG
 


@@ -519,28 +452,36 @@ typedef enum { yyok, yyaccept, yyabort, yyerr } YYRESULTTAG;
 #  define YYFPRINTF fprintf
 # endif
 
 #  define YYFPRINTF fprintf
 # endif
 

+]b4_yy_location_print_define[
+

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

-do {                                            \
-  if (yydebug)                                  \
-    YYFPRINTF Args;                             \
-} while (YYID (0))
-
-]b4_yy_symbol_print_generate([b4_c_ansi_function_def])[
-
-# define YY_SYMBOL_PRINT(Title, Type, Value, Location)          \
-do {                                                            \
-  if (yydebug)                                                  \
-    {                                                           \
-      YYFPRINTF (stderr, "%s ", Title);                         \
-      yy_symbol_print (stderr, Type, Value]b4_locuser_args([Location])[);        \
-      YYFPRINTF (stderr, "\n");                                 \
-    }                                                           \
-} while (YYID (0))
+  do {                                          \
+    if (yydebug)                                \
+      YYFPRINTF Args;                           \
+  } while (0)
+
+]b4_yy_symbol_print_define[
+
+# 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;
 

+struct yyGLRStack;
+static void yypstack (struct yyGLRStack* yystackp, size_t yyk)
+  YY_ATTRIBUTE_UNUSED;
+static void yypdumpstack (struct yyGLRStack* yystackp)
+  YY_ATTRIBUTE_UNUSED;
+

 #else /* !]b4_api_PREFIX[DEBUG */
 
 # define YYDPRINTF(Args)
 #else /* !]b4_api_PREFIX[DEBUG */
 
 # define YYDPRINTF(Args)


@@ -572,13 +513,7 @@ int yydebug;
 #define YYHEADROOM 2
 
 #ifndef YYSTACKEXPANDABLE
 #define YYHEADROOM 2
 
 #ifndef YYSTACKEXPANDABLE

-# if (! defined __cplusplus \
-      || (]b4_locations_if([[defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL \
-          && ]])[defined ]b4_api_PREFIX[STYPE_IS_TRIVIAL && ]b4_api_PREFIX[STYPE_IS_TRIVIAL))

 #  define YYSTACKEXPANDABLE 1
 #  define YYSTACKEXPANDABLE 1

-# else
-#  define YYSTACKEXPANDABLE 0
-# endif

 #endif
 
 #if YYSTACKEXPANDABLE
 #endif
 
 #if YYSTACKEXPANDABLE


@@ -586,13 +521,13 @@ int yydebug;
   do {                                                  \
     if (Yystack->yyspaceLeft < YYHEADROOM)              \
       yyexpandGLRStack (Yystack);                       \
   do {                                                  \
     if (Yystack->yyspaceLeft < YYHEADROOM)              \
       yyexpandGLRStack (Yystack);                       \

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

 #else
 # define YY_RESERVE_GLRSTACK(Yystack)                   \
   do {                                                  \
     if (Yystack->yyspaceLeft < YYHEADROOM)              \
       yyMemoryExhausted (Yystack);                      \
 #else
 # define YY_RESERVE_GLRSTACK(Yystack)                   \
   do {                                                  \
     if (Yystack->yyspaceLeft < YYHEADROOM)              \
       yyMemoryExhausted (Yystack);                      \

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

 #endif
 
 
 #endif
 
 


@@ -675,7 +610,7 @@ 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;
 
 /** Item references, as in LALR(1) machine */
 typedef short int yyItemNum;


@@ -696,7 +631,7 @@ struct yyGLRState {
   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
   size_t yyposn;
   union {
     /** First in a chain of alternative reductions producing the


@@ -767,19 +702,15 @@ struct yyGLRStack {
 static void yyexpandGLRStack (yyGLRStack* yystackp);
 #endif
 
 static void yyexpandGLRStack (yyGLRStack* yystackp);
 #endif
 

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

 yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg)
 {
 yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg)
 {

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

     yyerror (]b4_yyerror_args[yymsg);
   YYLONGJMP (yystackp->yyexception_buffer, 1);
 }
 
     yyerror (]b4_yyerror_args[yymsg);
   YYLONGJMP (yystackp->yyexception_buffer, 1);
 }
 

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

 yyMemoryExhausted (yyGLRStack* yystackp)
 {
   YYLONGJMP (yystackp->yyexception_buffer, 2);
 yyMemoryExhausted (yyGLRStack* yystackp)
 {
   YYLONGJMP (yystackp->yyexception_buffer, 2);


@@ -800,7 +731,7 @@ yytokenName (yySymbol yytoken)
 /** Fill in YYVSP[YYLOW1 .. YYLOW0-1] from the chain of states starting
  *  at YYVSP[YYLOW0].yystate.yypred.  Leaves YYVSP[YYLOW1].yystate.yypred
  *  containing the pointer to the next state in the chain.  */
 /** Fill in YYVSP[YYLOW1 .. YYLOW0-1] from the chain of states starting
  *  at YYVSP[YYLOW0].yystate.yypred.  Leaves YYVSP[YYLOW1].yystate.yypred
  *  containing the pointer to the next state in the chain.  */

-static void yyfillin (yyGLRStackItem *, int, int) __attribute__ ((__unused__));
+static void yyfillin (yyGLRStackItem *, int, int) YY_ATTRIBUTE_UNUSED;

 static void
 yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)
 {
 static void
 yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)
 {


@@ -808,9 +739,16 @@ yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)
   yyGLRState *s = yyvsp[yylow0].yystate.yypred;
   for (i = yylow0-1; i >= yylow1; i -= 1)
     {
   yyGLRState *s = yyvsp[yylow0].yystate.yypred;
   for (i = yylow0-1; i >= yylow1; i -= 1)
     {

-      YYASSERT (s->yyresolved);
-      yyvsp[i].yystate.yyresolved = yytrue;
-      yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval;]b4_locations_if([[
+#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_NULLPTR;]b4_locations_if([[

       yyvsp[i].yystate.yyloc = s->yyloc;]])[
       s = yyvsp[i].yystate.yypred = s->yypred;
     }
       yyvsp[i].yystate.yyloc = s->yyloc;]])[
       s = yyvsp[i].yystate.yypred = s->yypred;
     }


@@ -820,7 +758,7 @@ yyfillin (yyGLRStackItem *yyvsp, int yylow0, int 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)
  * YYVSP[YYLOW1 .. *YYLOW-1] as in yyfillin and set *YYLOW = YYLOW1.
  * For convenience, always return YYLOW1.  */
 static inline int yyfill (yyGLRStackItem *, int *, int, yybool)

-     __attribute__ ((__unused__));
+     YY_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)
 {


@@ -837,16 +775,16 @@ yyfill (yyGLRStackItem *yyvsp, int *yylow, int yylow1, yybool yynormal)
  *  value ($$), and yylocp points to place for location information
  *  (@@$).  Returns yyok for normal return, yyaccept for YYACCEPT,
  *  yyerr for YYERROR, yyabort for YYABORT.  */
  *  value ($$), and yylocp points to place for location information
  *  (@@$).  Returns yyok for normal return, yyaccept for YYACCEPT,
  *  yyerr for YYERROR, yyabort for YYABORT.  */

-/*ARGSUSED*/ static YYRESULTTAG
-yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
+static YYRESULTTAG
+yyuserAction (yyRuleNum yyn, size_t yyrhslen, yyGLRStackItem* yyvsp,

               yyGLRStack* yystackp,
               YYSTYPE* yyvalp]b4_locuser_formals[)
 {
               yyGLRStack* yystackp,
               YYSTYPE* yyvalp]b4_locuser_formals[)
 {

-  yybool yynormal __attribute__ ((__unused__)) =
-    (yystackp->yysplitPoint == YY_NULL);
+  yybool yynormal YY_ATTRIBUTE_UNUSED = (yystackp->yysplitPoint == YY_NULLPTR);

   int yylow;
   int yylow;

-]b4_parse_param_use[]dnl
-[# undef yyerrok
+]b4_parse_param_use([yyvalp], [yylocp])dnl
+[  YYUSE (yyrhslen);
+# undef yyerrok

 # define yyerrok (yystackp->yyerrState = 0)
 # undef YYACCEPT
 # define YYACCEPT return yyaccept
 # define yyerrok (yystackp->yyerrState = 0)
 # undef YYACCEPT
 # define YYACCEPT return yyaccept


@@ -888,9 +826,9 @@ yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
 # undef yyclearin
 # undef YYRECOVERING
 }
 # undef yyclearin
 # undef YYRECOVERING
 }

-\f

 
 

-/*ARGSUSED*/ static void
+
+static void

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


@@ -898,14 +836,14 @@ yyuserMerge (int yyn, YYSTYPE* yy0, YYSTYPE* yy1)
 
   switch (yyn)
     {
 
   switch (yyn)
     {

-      ]b4_mergers[
+]b4_mergers[

       default: break;
     }
 }
 
                               /* Bison grammar-table manipulation.  */
 
       default: break;
     }
 }
 
                               /* Bison grammar-table manipulation.  */
 

-]b4_yydestruct_generate([b4_c_ansi_function_def])[
+]b4_yydestruct_define[

 
 /** Number of symbols composing the right hand side of rule #RULE.  */
 static inline int
 
 /** Number of symbols composing the right hand side of rule #RULE.  */
 static inline int


@@ -926,12 +864,10 @@ yydestroyGLRState (char const *yymsg, yyGLRState *yys]b4_user_formals[)
       if (yydebug)
         {
           if (yys->yysemantics.yyfirstVal)
       if (yydebug)
         {
           if (yys->yysemantics.yyfirstVal)

-            YYFPRINTF (stderr, "%s unresolved ", yymsg);
+            YYFPRINTF (stderr, "%s unresolved", yymsg);

           else
           else

-            YYFPRINTF (stderr, "%s incomplete ", yymsg);
-          yy_symbol_print (stderr, yystos[yys->yylrState],
-                           YY_NULL]b4_locuser_args([&yys->yyloc])[);
-          YYFPRINTF (stderr, "\n");
+            YYFPRINTF (stderr, "%s incomplete", yymsg);
+          YY_SYMBOL_PRINT ("", yystos[yys->yylrState], YY_NULLPTR, &yys->yyloc);

         }
 #endif
 
         }
 #endif
 


@@ -948,7 +884,7 @@ yydestroyGLRState (char const *yymsg, yyGLRState *yys]b4_user_formals[)
     }
 }
 
     }
 }
 

-/** Left-hand-side symbol for rule #RULE.  */
+/** Left-hand-side symbol for rule #YYRULE.  */

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


@@ -958,7 +894,7 @@ yylhsNonterm (yyRuleNum yyrule)
 #define yypact_value_is_default(Yystate) \
   ]b4_table_value_equals([[pact]], [[Yystate]], [b4_pact_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
+/** True iff LR state YYSTATE has only a default reduction (regardless

  *  of token).  */
 static inline yybool
 yyisDefaultedState (yyStateNum yystate)
  *  of token).  */
 static inline yybool
 yyisDefaultedState (yyStateNum yystate)


@@ -966,7 +902,7 @@ yyisDefaultedState (yyStateNum yystate)
   return yypact_value_is_default (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)
 {
 static inline yyRuleNum
 yydefaultAction (yyStateNum yystate)
 {


@@ -981,8 +917,8 @@ yydefaultAction (yyStateNum yystate)
  *    R < 0:  Reduce on rule -R.
  *    R = 0:  Error.
  *    R > 0:  Shift to state R.
  *    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,


@@ -1007,15 +943,18 @@ yygetLRActions (yyStateNum yystate, int yytoken,
     }
 }
 
     }
 }
 

+/** Compute post-reduction state.
+ * \param yystate   the current state
+ * \param yysym     the nonterminal to push on the stack
+ */

 static inline yyStateNum
 static inline yyStateNum

-yyLRgotoState (yyStateNum yystate, yySymbol yylhs)
+yyLRgotoState (yyStateNum yystate, yySymbol yysym)

 {
 {

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

-    return yydefgoto[yylhs - YYNTOKENS];
+    return yydefgoto[yysym - YYNTOKENS];

 }
 
 static inline yybool
 }
 
 static inline yybool


@@ -1032,9 +971,10 @@ yyisErrorAction (int yyaction)
 
                                 /* GLRStates */
 
 
                                 /* GLRStates */
 

-/** Return a fresh GLRStackItem.  Callers should call
- * YY_RESERVE_GLRSTACK afterwards to make sure there is sufficient
- * headroom.  */
+/** 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)
 
 static inline yyGLRStackItem*
 yynewGLRStackItem (yyGLRStack* yystackp, yybool yyisState)


@@ -1047,16 +987,17 @@ yynewGLRStackItem (yyGLRStack* yystackp, yybool yyisState)
 }
 
 /** Add a new semantic action that will execute the action for rule
 }
 
 /** Add a new semantic action that will execute the action for rule

- *  RULENUM on the semantic values in RHS to the list of
- *  alternative actions for STATE.  Assumes that RHS comes from
- *  stack #K of *STACKP. */
+ *  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,
 static void
 yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate,

-                     yyGLRState* rhs, yyRuleNum yyrule)
+                     yyGLRState* yyrhs, yyRuleNum yyrule)

 {
   yySemanticOption* yynewOption =
     &yynewGLRStackItem (yystackp, yyfalse)->yyoption;
 {
   yySemanticOption* yynewOption =
     &yynewGLRStackItem (yystackp, yyfalse)->yyoption;

-  yynewOption->yystate = rhs;
+  YYASSERT (!yynewOption->yyisState);
+  yynewOption->yystate = yyrhs;

   yynewOption->yyrule = yyrule;
   if (yystackp->yytops.yylookaheadNeeds[yyk])
     {
   yynewOption->yyrule = yyrule;
   if (yystackp->yytops.yylookaheadNeeds[yyk])
     {


@@ -1074,7 +1015,7 @@ yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate,
 
                                 /* GLRStacks */
 
 
                                 /* GLRStacks */
 

-/** Initialize SET to a singleton set containing an empty stack.  */
+/** Initialize YYSET to a singleton set containing an empty stack.  */

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


@@ -1083,7 +1024,7 @@ 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] = YY_NULL;
+  yyset->yystates[0] = YY_NULLPTR;

   yyset->yylookaheadNeeds =
     (yybool*) YYMALLOC (16 * sizeof yyset->yylookaheadNeeds[0]);
   if (! yyset->yylookaheadNeeds)
   yyset->yylookaheadNeeds =
     (yybool*) YYMALLOC (16 * sizeof yyset->yylookaheadNeeds[0]);
   if (! yyset->yylookaheadNeeds)


@@ -1100,8 +1041,8 @@ static void yyfreeStateSet (yyGLRStateSet* yyset)
   YYFREE (yyset->yylookaheadNeeds);
 }
 
   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
 yyinitGLRStack (yyGLRStack* yystackp, size_t yysize)
 {
 static yybool
 yyinitGLRStack (yyGLRStack* yystackp, size_t yysize)
 {


@@ -1113,8 +1054,8 @@ yyinitGLRStack (yyGLRStack* yystackp, size_t yysize)
   if (!yystackp->yyitems)
     return yyfalse;
   yystackp->yynextFree = yystackp->yyitems;
   if (!yystackp->yyitems)
     return yyfalse;
   yystackp->yynextFree = yystackp->yyitems;

-  yystackp->yysplitPoint = YY_NULL;
-  yystackp->yylastDeleted = YY_NULL;
+  yystackp->yysplitPoint = YY_NULLPTR;
+  yystackp->yylastDeleted = YY_NULLPTR;

   return yyinitStateSet (&yystackp->yytops);
 }
 
   return yyinitStateSet (&yystackp->yytops);
 }
 


@@ -1123,7 +1064,7 @@ yyinitGLRStack (yyGLRStack* yystackp, size_t yysize)
 # define YYRELOC(YYFROMITEMS,YYTOITEMS,YYX,YYTYPE) \
   &((YYTOITEMS) - ((YYFROMITEMS) - (yyGLRStackItem*) (YYX)))->YYTYPE
 
 # define YYRELOC(YYFROMITEMS,YYTOITEMS,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


@@ -1153,10 +1094,10 @@ yyexpandGLRStack (yyGLRStack* yystackp)
         {
           yyGLRState* yys0 = &yyp0->yystate;
           yyGLRState* yys1 = &yyp1->yystate;
         {
           yyGLRState* yys0 = &yyp0->yystate;
           yyGLRState* yys1 = &yyp1->yystate;

-          if (yys0->yypred != YY_NULL)
+          if (yys0->yypred != YY_NULLPTR)

             yys1->yypred =
               YYRELOC (yyp0, yyp1, yys0->yypred, yystate);
             yys1->yypred =
               YYRELOC (yyp0, yyp1, yys0->yypred, yystate);

-          if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != YY_NULL)
+          if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != YY_NULLPTR)

             yys1->yysemantics.yyfirstVal =
               YYRELOC (yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption);
         }
             yys1->yysemantics.yyfirstVal =
               YYRELOC (yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption);
         }


@@ -1164,18 +1105,18 @@ yyexpandGLRStack (yyGLRStack* yystackp)
         {
           yySemanticOption* yyv0 = &yyp0->yyoption;
           yySemanticOption* yyv1 = &yyp1->yyoption;
         {
           yySemanticOption* yyv0 = &yyp0->yyoption;
           yySemanticOption* yyv1 = &yyp1->yyoption;

-          if (yyv0->yystate != YY_NULL)
+          if (yyv0->yystate != YY_NULLPTR)

             yyv1->yystate = YYRELOC (yyp0, yyp1, yyv0->yystate, yystate);
             yyv1->yystate = YYRELOC (yyp0, yyp1, yyv0->yystate, yystate);

-          if (yyv0->yynext != YY_NULL)
+          if (yyv0->yynext != YY_NULLPTR)

             yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption);
         }
     }
             yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption);
         }
     }

-  if (yystackp->yysplitPoint != YY_NULL)
+  if (yystackp->yysplitPoint != YY_NULLPTR)

     yystackp->yysplitPoint = YYRELOC (yystackp->yyitems, yynewItems,
     yystackp->yysplitPoint = YYRELOC (yystackp->yyitems, yynewItems,

-                                 yystackp->yysplitPoint, yystate);
+                                      yystackp->yysplitPoint, yystate);

 
   for (yyn = 0; yyn < yystackp->yytops.yysize; yyn += 1)
 
   for (yyn = 0; yyn < yystackp->yytops.yysize; yyn += 1)

-    if (yystackp->yytops.yystates[yyn] != YY_NULL)
+    if (yystackp->yytops.yystates[yyn] != YY_NULLPTR)

       yystackp->yytops.yystates[yyn] =
         YYRELOC (yystackp->yyitems, yynewItems,
                  yystackp->yytops.yystates[yyn], yystate);
       yystackp->yytops.yystates[yyn] =
         YYRELOC (yystackp->yyitems, yynewItems,
                  yystackp->yytops.yystates[yyn], yystate);


@@ -1193,37 +1134,37 @@ yyfreeGLRStack (yyGLRStack* yystackp)
   yyfreeStateSet (&yystackp->yytops);
 }
 
   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
 yyupdateSplit (yyGLRStack* yystackp, yyGLRState* yys)
 {
 static inline void
 yyupdateSplit (yyGLRStack* yystackp, yyGLRState* yys)
 {

-  if (yystackp->yysplitPoint != YY_NULL && yystackp->yysplitPoint > yys)
+  if (yystackp->yysplitPoint != YY_NULLPTR && yystackp->yysplitPoint > yys)

     yystackp->yysplitPoint = yys;
 }
 
     yystackp->yysplitPoint = yys;
 }
 

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

 static inline void
 yymarkStackDeleted (yyGLRStack* yystackp, size_t yyk)
 {
 static inline void
 yymarkStackDeleted (yyGLRStack* yystackp, size_t yyk)
 {

-  if (yystackp->yytops.yystates[yyk] != YY_NULL)
+  if (yystackp->yytops.yystates[yyk] != YY_NULLPTR)

     yystackp->yylastDeleted = yystackp->yytops.yystates[yyk];
     yystackp->yylastDeleted = yystackp->yytops.yystates[yyk];

-  yystackp->yytops.yystates[yyk] = YY_NULL;
+  yystackp->yytops.yystates[yyk] = YY_NULLPTR;

 }
 
 }
 

-/** Undelete the last stack that was marked as deleted.  Can only be
-    done once after a deletion, and only when all other stacks have
+/** Undelete the last stack 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
 yyundeleteLastStack (yyGLRStack* yystackp)
 {
     been deleted.  */
 static void
 yyundeleteLastStack (yyGLRStack* yystackp)
 {

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

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

-  yystackp->yylastDeleted = YY_NULL;
+  yystackp->yylastDeleted = YY_NULLPTR;

 }
 
 static inline void
 }
 
 static inline void


@@ -1233,7 +1174,7 @@ yyremoveDeletes (yyGLRStack* yystackp)
   yyi = yyj = 0;
   while (yyj < yystackp->yytops.yysize)
     {
   yyi = yyj = 0;
   while (yyj < yystackp->yytops.yysize)
     {

-      if (yystackp->yytops.yystates[yyi] == YY_NULL)
+      if (yystackp->yytops.yystates[yyi] == YY_NULLPTR)

         {
           if (yyi == yyj)
             {
         {
           if (yyi == yyj)
             {


@@ -1262,8 +1203,9 @@ yyremoveDeletes (yyGLRStack* yystackp)
     }
 }
 
     }
 }
 

-/** 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
 yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
             size_t yyposn,
 static inline void
 yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
             size_t yyposn,


@@ -1282,31 +1224,73 @@ yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
   YY_RESERVE_GLRSTACK (yystackp);
 }
 
   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)
  *  semantic value of YYRHS under the action for YYRULE.  */
 static inline void
 yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
  *  state YYLRSTATE, at input position YYPOSN, with the (unresolved)
  *  semantic value of YYRHS under the action for YYRULE.  */
 static inline void
 yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,

-                 size_t yyposn, yyGLRState* rhs, yyRuleNum yyrule)
+                 size_t yyposn, yyGLRState* yyrhs, yyRuleNum yyrule)

 {
   yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate;
 {
   yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate;

+  YYASSERT (yynewState->yyisState);

 
   yynewState->yylrState = yylrState;
   yynewState->yyposn = yyposn;
   yynewState->yyresolved = yyfalse;
   yynewState->yypred = yystackp->yytops.yystates[yyk];
 
   yynewState->yylrState = yylrState;
   yynewState->yyposn = yyposn;
   yynewState->yyresolved = yyfalse;
   yynewState->yypred = yystackp->yytops.yystates[yyk];

-  yynewState->yysemantics.yyfirstVal = YY_NULL;
+  yynewState->yysemantics.yyfirstVal = YY_NULLPTR;

   yystackp->yytops.yystates[yyk] = yynewState;
 
   /* Invokes YY_RESERVE_GLRSTACK.  */
   yystackp->yytops.yystates[yyk] = yynewState;
 
   /* Invokes YY_RESERVE_GLRSTACK.  */

-  yyaddDeferredAction (yystackp, yyk, yynewState, rhs, yyrule);
+  yyaddDeferredAction (yystackp, yyk, yynewState, yyrhs, yyrule);
+}
+
+#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 #RULE from the top of stack
- *  #K of STACK, and perform the appropriate semantic action on their
+/** 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
+ *  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
 yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
  *  for userAction.  */
 static inline YYRESULTTAG
 yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,


@@ -1314,23 +1298,20 @@ yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
 {
   int yynrhs = yyrhsLength (yyrule);
 
 {
   int yynrhs = yyrhsLength (yyrule);
 

-  if (yystackp->yysplitPoint == YY_NULL)
+  if (yystackp->yysplitPoint == YY_NULLPTR)

     {
       /* Standard special case: single stack.  */
     {
       /* Standard special case: single stack.  */

-      yyGLRStackItem* rhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];
+      yyGLRStackItem* yyrhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];

       YYASSERT (yyk == 0);
       yystackp->yynextFree -= yynrhs;
       yystackp->yyspaceLeft += yynrhs;
       yystackp->yytops.yystates[0] = & yystackp->yynextFree[-1].yystate;
       YYASSERT (yyk == 0);
       yystackp->yynextFree -= yynrhs;
       yystackp->yyspaceLeft += yynrhs;
       yystackp->yytops.yystates[0] = & yystackp->yynextFree[-1].yystate;

-      return yyuserAction (yyrule, yynrhs, rhs, yystackp,
+      YY_REDUCE_PRINT ((1, yyrhs, yyk, yyrule]b4_user_args[));
+      return yyuserAction (yyrule, yynrhs, yyrhs, yystackp,

                            yyvalp]b4_locuser_args[);
     }
   else
     {
                            yyvalp]b4_locuser_args[);
     }
   else
     {

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

       int yyi;
       yyGLRState* yys;
       yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
       int yyi;
       yyGLRState* yys;
       yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];


@@ -1346,62 +1327,21 @@ yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
         }
       yyupdateSplit (yystackp, yys);
       yystackp->yytops.yystates[yyk] = 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,
                            yystackp, yyvalp]b4_locuser_args[);
     }
 }
 
       return yyuserAction (yyrule, yynrhs, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
                            yystackp, yyvalp]b4_locuser_args[);
     }
 }
 

-#if !]b4_api_PREFIX[DEBUG
-# define YY_REDUCE_PRINT(Args)
-#else
-# define YY_REDUCE_PRINT(Args)          \
-do {                                    \
-  if (yydebug)                          \
-    yy_reduce_print Args;               \
-} while (YYID (0))
-
-/*----------------------------------------------------------.
-| Report that the RULE is going to be reduced on stack #K.  |
-`----------------------------------------------------------*/
-
-/*ARGSUSED*/ static inline void
-yy_reduce_print (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
-                 YYSTYPE* yyvalp]b4_locuser_formals[)
-{
-  int yynrhs = yyrhsLength (yyrule);
-  yybool yynormal __attribute__ ((__unused__)) =
-    (yystackp->yysplitPoint == YY_NULL);
-  yyGLRStackItem* yyvsp = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];
-  int yylow = 1;
-  int yyi;
-  YYUSE (yyvalp);]b4_locations_if([
-  YYUSE (yylocp);])[
-]b4_parse_param_use[]dnl
-[  YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu):\n",
-             (unsigned long int) yyk, yyrule - 1,
-             (unsigned long int) yyrline[yyrule]);
-  /* The symbols being reduced.  */
-  for (yyi = 0; yyi < yynrhs; yyi++)
-    {
-      YYFPRINTF (stderr, "   $%d = ", yyi + 1);
-      yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
-                       &]b4_rhs_value(yynrhs, yyi + 1)[
-                       ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
-                       b4_user_args[);
-      YYFPRINTF (stderr, "\n");
-    }
-}
-#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


@@ -1410,13 +1350,19 @@ yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
 {
   size_t yyposn = yystackp->yytops.yystates[yyk]->yyposn;
 
 {
   size_t yyposn = yystackp->yytops.yystates[yyk]->yyposn;
 

-  if (yyforceEval || yystackp->yysplitPoint == YY_NULL)
+  if (yyforceEval || yystackp->yysplitPoint == YY_NULLPTR)

     {
     {

-      YYSTYPE yysval;]b4_locations_if([
-      YYLTYPE yyloc;])[
+      YYSTYPE yysval;]b4_locations_if([[
+      YYLTYPE yyloc;]])[

 
 

-      YY_REDUCE_PRINT ((yystackp, yyk, yyrule, &yysval]b4_locuser_args([&yyloc])[));
-      YYCHK (yydoAction (yystackp, yyk, yyrule, &yysval]b4_locuser_args([&yyloc])[));
+      YYRESULTTAG yyflag = yydoAction (yystackp, yyk, yyrule, &yysval]b4_locuser_args([&yyloc])[);
+      if (yyflag == yyerr && yystackp->yysplitPoint != YY_NULLPTR)
+        {
+          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 ("-> $$ =", yyr1[yyrule], &yysval, &yyloc);
       yyglrShift (yystackp, yyk,
                   yyLRgotoState (yystackp->yytops.yystates[yyk]->yylrState,
       YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyrule], &yysval, &yyloc);
       yyglrShift (yystackp, yyk,
                   yyLRgotoState (yystackp->yytops.yystates[yyk]->yylrState,


@@ -1439,10 +1385,11 @@ yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
       yyupdateSplit (yystackp, yys);
       yynewLRState = yyLRgotoState (yys->yylrState, yylhsNonterm (yyrule));
       YYDPRINTF ((stderr,
       yyupdateSplit (yystackp, yys);
       yynewLRState = yyLRgotoState (yys->yylrState, yylhsNonterm (yyrule));
       YYDPRINTF ((stderr,

-                  "Reduced stack %lu by rule #%d; action deferred.  Now in state %d.\n",
+                  "Reduced stack %lu by rule #%d; action deferred.  "
+                  "Now in state %d.\n",

                   (unsigned long int) yyk, yyrule - 1, yynewLRState));
       for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)
                   (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)
+        if (yyi != yyk && yystackp->yytops.yystates[yyi] != YY_NULLPTR)

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


@@ -1469,7 +1416,7 @@ yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
 static size_t
 yysplitStack (yyGLRStack* yystackp, size_t yyk)
 {
 static size_t
 yysplitStack (yyGLRStack* yystackp, size_t yyk)
 {

-  if (yystackp->yysplitPoint == YY_NULL)
+  if (yystackp->yysplitPoint == YY_NULLPTR)

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


@@ -1479,7 +1426,7 @@ yysplitStack (yyGLRStack* yystackp, size_t yyk)
       yyGLRState** yynewStates;
       yybool* yynewLookaheadNeeds;
 
       yyGLRState** yynewStates;
       yybool* yynewLookaheadNeeds;
 

-      yynewStates = YY_NULL;
+      yynewStates = YY_NULLPTR;

 
       if (yystackp->yytops.yycapacity
           > (YYSIZEMAX / (2 * sizeof yynewStates[0])))
 
       if (yystackp->yytops.yycapacity
           > (YYSIZEMAX / (2 * sizeof yynewStates[0])))


@@ -1490,7 +1437,7 @@ yysplitStack (yyGLRStack* yystackp, size_t yyk)
         (yyGLRState**) YYREALLOC (yystackp->yytops.yystates,
                                   (yystackp->yytops.yycapacity
                                    * sizeof yynewStates[0]));
         (yyGLRState**) YYREALLOC (yystackp->yytops.yystates,
                                   (yystackp->yytops.yycapacity
                                    * sizeof yynewStates[0]));

-      if (yynewStates == YY_NULL)
+      if (yynewStates == YY_NULLPTR)

         yyMemoryExhausted (yystackp);
       yystackp->yytops.yystates = yynewStates;
 
         yyMemoryExhausted (yystackp);
       yystackp->yytops.yystates = yynewStates;
 


@@ -1498,7 +1445,7 @@ yysplitStack (yyGLRStack* yystackp, size_t yyk)
         (yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds,
                              (yystackp->yytops.yycapacity
                               * sizeof yynewLookaheadNeeds[0]));
         (yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds,
                              (yystackp->yytops.yycapacity
                               * sizeof yynewLookaheadNeeds[0]));

-      if (yynewLookaheadNeeds == YY_NULL)
+      if (yynewLookaheadNeeds == YY_NULLPTR)

         yyMemoryExhausted (yystackp);
       yystackp->yytops.yylookaheadNeeds = yynewLookaheadNeeds;
     }
         yyMemoryExhausted (yystackp);
       yystackp->yytops.yylookaheadNeeds = yynewLookaheadNeeds;
     }


@@ -1510,7 +1457,7 @@ yysplitStack (yyGLRStack* yystackp, size_t yyk)
   return 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 produce the same terminal symbols.  */
 static yybool
  *  That is, they represent the same rule applied to RHS symbols
  *  that produce the same terminal symbols.  */
 static yybool


@@ -1532,8 +1479,8 @@ yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
     return yyfalse;
 }
 
     return yyfalse;
 }
 

-/** Assuming identicalOptions (Y0,Y1), destructively merge the
- *  alternative semantic values for the RHS-symbols of Y1 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)
 {


@@ -1560,11 +1507,11 @@ yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
         {
           yySemanticOption** yyz0p = &yys0->yysemantics.yyfirstVal;
           yySemanticOption* yyz1 = yys1->yysemantics.yyfirstVal;
         {
           yySemanticOption** yyz0p = &yys0->yysemantics.yyfirstVal;
           yySemanticOption* yyz1 = yys1->yysemantics.yyfirstVal;

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

             {
             {

-              if (yyz1 == *yyz0p || yyz1 == YY_NULL)
+              if (yyz1 == *yyz0p || yyz1 == YY_NULLPTR)

                 break;
                 break;

-              else if (*yyz0p == YY_NULL)
+              else if (*yyz0p == YY_NULLPTR)

                 {
                   *yyz0p = yyz1;
                   break;
                 {
                   *yyz0p = yyz1;
                   break;


@@ -1612,11 +1559,11 @@ static YYRESULTTAG yyresolveValue (yyGLRState* yys,
                                    yyGLRStack* yystackp]b4_user_formals[);
 
 
                                    yyGLRStack* yystackp]b4_user_formals[);
 
 

-/** Resolve the previous N states starting at and including state S.  If result
- *  != yyok, some states may have been left unresolved possibly with empty
- *  semantic option chains.  Regardless of whether result = yyok, each state
- *  has been left with consistent data so that yydestroyGLRState can be invoked
- *  if necessary.  */
+/** 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
 yyresolveStates (yyGLRState* yys, int yyn,
                  yyGLRStack* yystackp]b4_user_formals[)
 static YYRESULTTAG
 yyresolveStates (yyGLRState* yys, int yyn,
                  yyGLRStack* yystackp]b4_user_formals[)


@@ -1631,9 +1578,10 @@ yyresolveStates (yyGLRState* yys, int yyn,
   return yyok;
 }
 
   return yyok;
 }
 

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


@@ -1684,7 +1632,7 @@ yyreportTree (yySemanticOption* yyx, int yyindent)
 
   for (yyi = yynrhs, yys = yyx->yystate; 0 < yyi; yyi -= 1, yys = yys->yypred)
     yystates[yyi] = yys;
 
   for (yyi = yynrhs, yys = yyx->yystate; 0 < yyi; yyi -= 1, yys = yys->yypred)
     yystates[yyi] = yys;

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

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


@@ -1707,11 +1655,11 @@ yyreportTree (yySemanticOption* yyx, int yyindent)
         {
           if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn)
             YYFPRINTF (stderr, "%*s%s <empty>\n", yyindent+2, "",
         {
           if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn)
             YYFPRINTF (stderr, "%*s%s <empty>\n", yyindent+2, "",

-                       yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]));
+                       yytokenName (yystos[yystates[yyi]->yylrState]));

           else
             YYFPRINTF (stderr, "%*s%s <tokens %lu .. %lu>\n", yyindent+2, "",
           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),
+                       yytokenName (yystos[yystates[yyi]->yylrState]),
+                       (unsigned long int) (yystates[yyi-1]->yyposn + 1),

                        (unsigned long int) yystates[yyi]->yyposn);
         }
       else
                        (unsigned long int) yystates[yyi]->yyposn);
         }
       else


@@ -1720,7 +1668,7 @@ yyreportTree (yySemanticOption* yyx, int yyindent)
 }
 #endif
 
 }
 #endif
 

-/*ARGSUSED*/ static YYRESULTTAG
+static YYRESULTTAG

 yyreportAmbiguity (yySemanticOption* yyx0,
                    yySemanticOption* yyx1]b4_pure_formals[)
 {
 yyreportAmbiguity (yySemanticOption* yyx0,
                    yySemanticOption* yyx1]b4_pure_formals[)
 {


@@ -1740,9 +1688,9 @@ yyreportAmbiguity (yySemanticOption* yyx0,
   return yyabort;
 }]b4_locations_if([[
 
   return yyabort;
 }]b4_locations_if([[
 

-/** Starting at and including state S1, resolve the location for each of the
- *  previous N1 states that is unresolved.  The first semantic option of a state
- *  is always chosen.  */
+/** 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[)
 static void
 yyresolveLocations (yyGLRState* yys1, int yyn1,
                     yyGLRStack *yystackp]b4_user_formals[)


@@ -1755,7 +1703,7 @@ yyresolveLocations (yyGLRState* yys1, int yyn1,
           yyGLRStackItem yyrhsloc[1 + YYMAXRHS];
           int yynrhs;
           yySemanticOption *yyoption = yys1->yysemantics.yyfirstVal;
           yyGLRStackItem yyrhsloc[1 + YYMAXRHS];
           int yynrhs;
           yySemanticOption *yyoption = yys1->yysemantics.yyfirstVal;

-          YYASSERT (yyoption != YY_NULL);
+          YYASSERT (yyoption != YY_NULLPTR);

           yynrhs = yyrhsLength (yyoption->yyrule);
           if (yynrhs > 0)
             {
           yynrhs = yyrhsLength (yyoption->yyrule);
           if (yynrhs > 0)
             {


@@ -1796,11 +1744,12 @@ yyresolveLocations (yyGLRState* yys1, int yyn1,
     }
 }]])[
 
     }
 }]])[
 

-/** Resolve the ambiguity represented in state S, perform the indicated
- *  actions, and set the semantic value of S.  If result != yyok, the chain of
- *  semantic options in S has been cleared instead or it has been left
- *  unmodified except that redundant options may have been removed.  Regardless
- *  of whether result = yyok, S has been left with consistent data so that
+/** 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
 yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)
  *  yydestroyGLRState can be invoked if necessary.  */
 static YYRESULTTAG
 yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)


@@ -1813,7 +1762,7 @@ yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)
   YYRESULTTAG yyflag;]b4_locations_if([
   YYLTYPE *yylocp = &yys->yyloc;])[
 
   YYRESULTTAG yyflag;]b4_locations_if([
   YYLTYPE *yylocp = &yys->yyloc;])[
 

-  for (yypp = &yyoptionList->yynext; *yypp != YY_NULL; )
+  for (yypp = &yyoptionList->yynext; *yypp != YY_NULLPTR; )

     {
       yySemanticOption* yyp = *yypp;
 
     {
       yySemanticOption* yyp = *yypp;
 


@@ -1855,7 +1804,7 @@ yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)
       int yyprec = yydprec[yybest->yyrule];
       yyflag = yyresolveAction (yybest, yystackp, &yysval]b4_locuser_args[);
       if (yyflag == yyok)
       int yyprec = yydprec[yybest->yyrule];
       yyflag = yyresolveAction (yybest, yystackp, &yysval]b4_locuser_args[);
       if (yyflag == yyok)

-        for (yyp = yybest->yynext; yyp != YY_NULL; yyp = yyp->yynext)
+        for (yyp = yybest->yynext; yyp != YY_NULLPTR; yyp = yyp->yynext)

           {
             if (yyprec == yydprec[yyp->yyrule])
               {
           {
             if (yyprec == yydprec[yyp->yyrule])
               {


@@ -1882,14 +1831,14 @@ yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)
       yys->yysemantics.yysval = yysval;
     }
   else
       yys->yysemantics.yysval = yysval;
     }
   else

-    yys->yysemantics.yyfirstVal = YY_NULL;
+    yys->yysemantics.yyfirstVal = YY_NULLPTR;

   return yyflag;
 }
 
 static YYRESULTTAG
 yyresolveStack (yyGLRStack* yystackp]b4_user_formals[)
 {
   return yyflag;
 }
 
 static YYRESULTTAG
 yyresolveStack (yyGLRStack* yystackp]b4_user_formals[)
 {

-  if (yystackp->yysplitPoint != YY_NULL)
+  if (yystackp->yysplitPoint != YY_NULLPTR)

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


@@ -1909,10 +1858,10 @@ yycompressStack (yyGLRStack* yystackp)
 {
   yyGLRState* yyp, *yyq, *yyr;
 
 {
   yyGLRState* yyp, *yyq, *yyr;
 

-  if (yystackp->yytops.yysize != 1 || yystackp->yysplitPoint == YY_NULL)
+  if (yystackp->yytops.yysize != 1 || yystackp->yysplitPoint == YY_NULLPTR)

     return;
 
     return;
 

-  for (yyp = yystackp->yytops.yystates[0], yyq = yyp->yypred, yyr = YY_NULL;
+  for (yyp = yystackp->yytops.yystates[0], yyq = yyp->yypred, yyr = YY_NULLPTR;

        yyp != yystackp->yysplitPoint;
        yyr = yyp, yyp = yyq, yyq = yyp->yypred)
     yyp->yypred = yyr;
        yyp != yystackp->yysplitPoint;
        yyr = yyp, yyp = yyq, yyq = yyp->yypred)
     yyp->yypred = yyr;


@@ -1920,10 +1869,10 @@ yycompressStack (yyGLRStack* yystackp)
   yystackp->yyspaceLeft += yystackp->yynextFree - yystackp->yyitems;
   yystackp->yynextFree = ((yyGLRStackItem*) yystackp->yysplitPoint) + 1;
   yystackp->yyspaceLeft -= yystackp->yynextFree - yystackp->yyitems;
   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;
+  yystackp->yysplitPoint = YY_NULLPTR;
+  yystackp->yylastDeleted = YY_NULLPTR;

 
 

-  while (yyr != YY_NULL)
+  while (yyr != YY_NULLPTR)

     {
       yystackp->yynextFree->yystate = *yyr;
       yyr = yyr->yypred;
     {
       yystackp->yynextFree->yystate = *yyr;
       yyr = yyr->yypred;


@@ -1938,11 +1887,7 @@ static YYRESULTTAG
 yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
                    size_t yyposn]b4_pure_formals[)
 {
 yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
                    size_t yyposn]b4_pure_formals[)
 {

-  int yyaction;
-  const short int* yyconflicts;
-  yyRuleNum yyrule;
-
-  while (yystackp->yytops.yystates[yyk] != YY_NULL)
+  while (yystackp->yytops.yystates[yyk] != YY_NULLPTR)

     {
       yyStateNum yystate = yystackp->yytops.yystates[yyk]->yylrState;
       YYDPRINTF ((stderr, "Stack %lu Entering state %d\n",
     {
       yyStateNum yystate = yystackp->yytops.yystates[yyk]->yylrState;
       YYDPRINTF ((stderr, "Stack %lu Entering state %d\n",


@@ -1952,7 +1897,8 @@ yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
 
       if (yyisDefaultedState (yystate))
         {
 
       if (yyisDefaultedState (yystate))
         {

-          yyrule = yydefaultAction (yystate);
+          YYRESULTTAG yyflag;
+          yyRuleNum yyrule = yydefaultAction (yystate);

           if (yyrule == 0)
             {
               YYDPRINTF ((stderr, "Stack %lu dies.\n",
           if (yyrule == 0)
             {
               YYDPRINTF ((stderr, "Stack %lu dies.\n",


@@ -1960,16 +1906,30 @@ yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
               yymarkStackDeleted (yystackp, yyk);
               return yyok;
             }
               yymarkStackDeleted (yystackp, yyk);
               return yyok;
             }

-          YYCHK (yyglrReduce (yystackp, yyk, yyrule, yyfalse]b4_user_args[));
+          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
         {
           yySymbol yytoken;
         }
       else
         {
           yySymbol yytoken;

+          int yyaction;
+          const short int* yyconflicts;
+

           yystackp->yytops.yylookaheadNeeds[yyk] = yytrue;
           if (yychar == YYEMPTY)
             {
               YYDPRINTF ((stderr, "Reading a token: "));
           yystackp->yytops.yylookaheadNeeds[yyk] = yytrue;
           if (yychar == YYEMPTY)
             {
               YYDPRINTF ((stderr, "Reading a token: "));

-              yychar = YYLEX;
+              yychar = ]b4_lex[;

             }
 
           if (yychar <= YYEOF)
             }
 
           if (yychar <= YYEOF)


@@ -1987,14 +1947,25 @@ yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
 
           while (*yyconflicts != 0)
             {
 
           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));
               size_t yynewStack = yysplitStack (yystackp, yyk);
               YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n",
                           (unsigned long int) yynewStack,
                           (unsigned long int) yyk));

-              YYCHK (yyglrReduce (yystackp, yynewStack,
-                                  *yyconflicts, yyfalse]b4_user_args[));
-              YYCHK (yyprocessOneStack (yystackp, yynewStack,
-                                        yyposn]b4_pure_args[));
+              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;
             }
 
               yyconflicts += 1;
             }
 


@@ -2008,14 +1979,27 @@ yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
               break;
             }
           else
               break;
             }
           else

-            YYCHK (yyglrReduce (yystackp, yyk, -yyaction,
-                                yyfalse]b4_user_args[));
+            {
+              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;
 }
 
         }
     }
   return yyok;
 }
 

-/*ARGSUSED*/ static void
+static void

 yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 {
   if (yystackp->yyerrState != 0)
 yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 {
   if (yystackp->yyerrState != 0)


@@ -2023,15 +2007,15 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 #if ! YYERROR_VERBOSE
   yyerror (]b4_lyyerror_args[YY_("syntax error"));
 #else
 #if ! YYERROR_VERBOSE
   yyerror (]b4_lyyerror_args[YY_("syntax error"));
 #else

+  {

   yySymbol yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
   yySymbol yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);

-  size_t yysize0 = yytnamerr (YY_NULL, yytokenName (yytoken));
+  size_t yysize0 = yytnamerr (YY_NULLPTR, yytokenName (yytoken));

   size_t yysize = yysize0;
   size_t yysize = yysize0;

-  size_t yysize1;

   yybool yysize_overflow = yyfalse;
   yybool yysize_overflow = yyfalse;

-  char* yymsg = YY_NULL;
+  char* yymsg = YY_NULLPTR;

   enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
   /* Internationalized format string. */
   enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
   /* Internationalized format string. */

-  const char *yyformat = YY_NULL;
+  const char *yyformat = YY_NULLPTR;

   /* Arguments of yyformat. */
   char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
   /* Number of reported tokens (one for the "unexpected", one per
   /* Arguments of yyformat. */
   char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
   /* Number of reported tokens (one for the "unexpected", one per


@@ -2086,9 +2070,11 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
                     break;
                   }
                 yyarg[yycount++] = yytokenName (yyx);
                     break;
                   }
                 yyarg[yycount++] = yytokenName (yyx);

-                yysize1 = yysize + yytnamerr (YY_NULL, yytokenName (yyx));
-                yysize_overflow |= yysize1 < yysize;
-                yysize = yysize1;
+                {
+                  size_t yysz = yysize + yytnamerr (YY_NULLPTR, yytokenName (yyx));
+                  yysize_overflow |= yysz < yysize;
+                  yysize = yysz;
+                }

               }
         }
     }
               }
         }
     }


@@ -2108,9 +2094,11 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 #undef YYCASE_
     }
 
 #undef YYCASE_
     }
 

-  yysize1 = yysize + strlen (yyformat);
-  yysize_overflow |= yysize1 < yysize;
-  yysize = yysize1;
+  {
+    size_t yysz = yysize + strlen (yyformat);
+    yysize_overflow |= yysz < yysize;
+    yysize = yysz;
+  }

 
   if (!yysize_overflow)
     yymsg = (char *) YYMALLOC (yysize);
 
   if (!yysize_overflow)
     yymsg = (char *) YYMALLOC (yysize);


@@ -2140,6 +2128,7 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
       yyerror (]b4_lyyerror_args[YY_("syntax error"));
       yyMemoryExhausted (yystackp);
     }
       yyerror (]b4_lyyerror_args[YY_("syntax error"));
       yyMemoryExhausted (yystackp);
     }

+  }

 #endif /* YYERROR_VERBOSE */
   yynerrs += 1;
 }
 #endif /* YYERROR_VERBOSE */
   yynerrs += 1;
 }


@@ -2147,7 +2136,7 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 /* Recover from a syntax error on *YYSTACKP, assuming that *YYSTACKP->YYTOKENP,
    yylval, and yylloc are the syntactic category, semantic value, and location
    of the lookahead.  */
 /* 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.  */

-/*ARGSUSED*/ static void
+static void

 yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 {
   size_t yyk;
 yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 {
   size_t yyk;


@@ -2156,11 +2145,11 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
   if (yystackp->yyerrState == 3)
     /* We just shifted the error token and (perhaps) took some
        reductions.  Skip tokens until we can proceed.  */
   if (yystackp->yyerrState == 3)
     /* We just shifted the error token and (perhaps) took some
        reductions.  Skip tokens until we can proceed.  */

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

       {
         yySymbol yytoken;
         if (yychar == YYEOF)
       {
         yySymbol yytoken;
         if (yychar == YYEOF)

-          yyFail (yystackp][]b4_lpure_args[, YY_NULL);
+          yyFail (yystackp][]b4_lpure_args[, YY_NULLPTR);

         if (yychar != YYEMPTY)
           {]b4_locations_if([[
             /* We throw away the lookahead, but the error range
         if (yychar != YYEMPTY)
           {]b4_locations_if([[
             /* We throw away the lookahead, but the error range


@@ -2175,7 +2164,7 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
                         yytoken, &yylval]b4_locuser_args([&yylloc])[);
           }
         YYDPRINTF ((stderr, "Reading a token: "));
                         yytoken, &yylval]b4_locuser_args([&yylloc])[);
           }
         YYDPRINTF ((stderr, "Reading a token: "));

-        yychar = YYLEX;
+        yychar = ]b4_lex[;

         if (yychar <= YYEOF)
           {
             yychar = yytoken = YYEOF;
         if (yychar <= YYEOF)
           {
             yychar = yytoken = YYEOF;


@@ -2201,10 +2190,10 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 
   /* Reduce to one stack.  */
   for (yyk = 0; yyk < yystackp->yytops.yysize; yyk += 1)
 
   /* Reduce to one stack.  */
   for (yyk = 0; yyk < yystackp->yytops.yysize; yyk += 1)

-    if (yystackp->yytops.yystates[yyk] != YY_NULL)
+    if (yystackp->yytops.yystates[yyk] != YY_NULLPTR)

       break;
   if (yyk >= yystackp->yytops.yysize)
       break;
   if (yyk >= yystackp->yytops.yysize)

-    yyFail (yystackp][]b4_lpure_args[, YY_NULL);
+    yyFail (yystackp][]b4_lpure_args[, YY_NULLPTR);

   for (yyk += 1; yyk < yystackp->yytops.yysize; yyk += 1)
     yymarkStackDeleted (yystackp, yyk);
   yyremoveDeletes (yystackp);
   for (yyk += 1; yyk < yystackp->yytops.yysize; yyk += 1)
     yymarkStackDeleted (yystackp, yyk);
   yyremoveDeletes (yystackp);


@@ -2212,7 +2201,7 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 
   /* Now pop stack until we find a state that shifts the error token.  */
   yystackp->yyerrState = 3;
 
   /* Now pop stack until we find a state that shifts the error token.  */
   yystackp->yyerrState = 3;

-  while (yystackp->yytops.yystates[0] != YY_NULL)
+  while (yystackp->yytops.yystates[0] != YY_NULLPTR)

     {
       yyGLRState *yys = yystackp->yytops.yystates[0];
       yyj = yypact[yys->yylrState];
     {
       yyGLRState *yys = yystackp->yytops.yystates[0];
       yyj = yypact[yys->yylrState];


@@ -2236,14 +2225,14 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
             }
         }]b4_locations_if([[
       yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
             }
         }]b4_locations_if([[
       yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[

-      if (yys->yypred != YY_NULL)
+      if (yys->yypred != YY_NULLPTR)

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

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

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


@@ -2260,14 +2249,13 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
     default:                                                                 \
       goto yybuglab;                                                         \
     }                                                                        \
     default:                                                                 \
       goto yybuglab;                                                         \
     }                                                                        \

-  } while (YYID (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;
   yyGLRStack yystack;
 {
   int yyresult;
   yyGLRStack yystack;


@@ -2281,8 +2269,8 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
   yylloc = yyloc_default;])[
 ]m4_ifdef([b4_initial_action], [
 b4_dollar_pushdef([yylval], [], [yylloc])dnl
   yylloc = yyloc_default;])[
 ]m4_ifdef([b4_initial_action], [
 b4_dollar_pushdef([yylval], [], [yylloc])dnl

-/* User initialization code.  */
-b4_user_initial_action
+  /* User initialization code.  */
+  b4_user_initial_action

 b4_dollar_popdef])[]dnl
 [
   if (! yyinitGLRStack (yystackp, YYINITDEPTH))
 b4_dollar_popdef])[]dnl
 [
   if (! yyinitGLRStack (yystackp, YYINITDEPTH))


@@ -2297,13 +2285,13 @@ b4_dollar_popdef])[]dnl
   yyglrShift (&yystack, 0, 0, 0, &yylval]b4_locations_if([, &yylloc])[);
   yyposn = 0;
 
   yyglrShift (&yystack, 0, 0, 0, &yylval]b4_locations_if([, &yylloc])[);
   yyposn = 0;
 

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

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

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

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


@@ -2330,7 +2318,7 @@ b4_dollar_popdef])[]dnl
               if (yychar == YYEMPTY)
                 {
                   YYDPRINTF ((stderr, "Reading a token: "));
               if (yychar == YYEMPTY)
                 {
                   YYDPRINTF ((stderr, "Reading a token: "));

-                  yychar = YYLEX;
+                  yychar = ]b4_lex[;

                 }
 
               if (yychar <= YYEOF)
                 }
 
               if (yychar <= YYEOF)


@@ -2367,7 +2355,7 @@ b4_dollar_popdef])[]dnl
             }
         }
 
             }
         }
 

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

         {
           yySymbol yytoken_to_shift;
           size_t yys;
         {
           yySymbol yytoken_to_shift;
           size_t yys;


@@ -2487,7 +2475,7 @@ b4_dollar_popdef])[]dnl
                   {
                     yyGLRState *yys = yystates[yyk];
 ]b4_locations_if([[                 yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
                   {
                     yyGLRState *yys = yystates[yyk];
 ]b4_locations_if([[                 yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]

-)[                  if (yys->yypred != YY_NULL)
+)[                  if (yys->yypred != YY_NULLPTR)

                       yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
                     yystates[yyk] = yys->yypred;
                     yystack.yynextFree -= 1;
                       yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
                     yystates[yyk] = yys->yypred;
                     yystack.yynextFree -= 1;


@@ -2499,16 +2487,11 @@ b4_dollar_popdef])[]dnl
       yyfreeGLRStack (&yystack);
     }
 
       yyfreeGLRStack (&yystack);
     }
 

-  /* Make sure YYID is used.  */
-  return YYID (yyresult);
+  return yyresult;

 }
 
 /* DEBUGGING ONLY */
 #if ]b4_api_PREFIX[DEBUG
 }
 
 /* DEBUGGING ONLY */
 #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)
 {


@@ -2524,7 +2507,7 @@ yy_yypstack (yyGLRState* yys)
 static void
 yypstates (yyGLRState* yyst)
 {
 static void
 yypstates (yyGLRState* yyst)
 {

-  if (yyst == YY_NULL)
+  if (yyst == YY_NULLPTR)

     YYFPRINTF (stderr, "<null>");
   else
     yy_yypstack (yyst);
     YYFPRINTF (stderr, "<null>");
   else
     yy_yypstack (yyst);


@@ -2538,7 +2521,7 @@ yypstack (yyGLRStack* yystackp, size_t yyk)
 }
 
 #define YYINDEX(YYX)                                                         \
 }
 
 #define YYINDEX(YYX)                                                         \

-    ((YYX) == YY_NULL ? -1 : (yyGLRStackItem*) (YYX) - yystackp->yyitems)
+    ((YYX) == YY_NULLPTR ? -1 : (yyGLRStackItem*) (YYX) - yystackp->yyitems)

 
 
 static void
 
 
 static void


@@ -2552,6 +2535,8 @@ yypdumpstack (yyGLRStack* yystackp)
                  (unsigned long int) (yyp - yystackp->yyitems));
       if (*(yybool *) yyp)
         {
                  (unsigned long int) (yyp - yystackp->yyitems));
       if (*(yybool *) yyp)
         {

+          YYASSERT (yyp->yystate.yyisState);
+          YYASSERT (yyp->yyoption.yyisState);

           YYFPRINTF (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
                      yyp->yystate.yyresolved, yyp->yystate.yylrState,
                      (unsigned long int) yyp->yystate.yyposn,
           YYFPRINTF (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
                      yyp->yystate.yyresolved, yyp->yystate.yylrState,
                      (unsigned long int) yyp->yystate.yyposn,


@@ -2563,6 +2548,8 @@ yypdumpstack (yyGLRStack* yystackp)
         }
       else
         {
         }
       else
         {

+          YYASSERT (!yyp->yystate.yyisState);
+          YYASSERT (!yyp->yyoption.yyisState);

           YYFPRINTF (stderr, "Option. rule: %d, state: %ld, next: %ld",
                      yyp->yyoption.yyrule - 1,
                      (long int) YYINDEX (yyp->yyoption.yystate),
           YYFPRINTF (stderr, "Option. rule: %d, state: %ld, next: %ld",
                      yyp->yyoption.yyrule - 1,
                      (long int) YYINDEX (yyp->yyoption.yystate),


@@ -2577,18 +2564,22 @@ yypdumpstack (yyGLRStack* yystackp)
   YYFPRINTF (stderr, "\n");
 }
 #endif
   YYFPRINTF (stderr, "\n");
 }
 #endif

-]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)
+#undef yylval
+#undef yychar
+#undef yynerrs]b4_locations_if([
+#undef yylloc])
+
+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]])])[
+
+]b4_epilogue[]dnl
+b4_output_end()