* configure.ac (AC_ARG_ENABLE): Use -Wextra -Wno-sign-compare

[bison.git] / data / glr.c

diff --git a/data/glr.c b/data/glr.c
index a810bcdc4e0f9e036f8df48236f453a98078f945..7c3d998d29aadbf89b82638d1831a5f01d8d99dc 100644 (file)
--- a/data/glr.c
+++ b/data/glr.c
@@ -52,7 +52,7 @@ m4_define([b4_user_formals],
 # Yes, this is quite ugly...
 m4_define([b4_lex_param],
 m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
 # Yes, this is quite ugly...
 m4_define([b4_lex_param],
 m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl

-b4_location_if([, [[YYLTYPE *], [&yylloc]]])])dnl
+b4_locations_if([, [[YYLTYPE *], [&yylloc]]])])dnl

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


@@ -61,15 +61,15 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param)))
 # Optional effective arguments passed to yyerror: user args plus yylloc, and
 # a trailing comma.
 m4_define([b4_yyerror_args],
 # Optional effective arguments passed to yyerror: user args plus yylloc, and
 # a trailing comma.
 m4_define([b4_yyerror_args],

-[b4_pure_if([b4_location_if([yylocp, ])])dnl
+[b4_pure_if([b4_locations_if([yylocp, ])])dnl

 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
 
 
 # b4_lyyerror_args
 # ----------------
 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
 
 
 # b4_lyyerror_args
 # ----------------

-# Same as above, but on the look-ahead, hence &yylloc instead of yylocp.
+# 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([&yylloc, ])])dnl
+[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_c_args(b4_parse_param), ])])
 
 


@@ -77,21 +77,21 @@ m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
 # ------------
 # Same as b4_yyerror_args, but with a leading comma.
 m4_define([b4_pure_args],
 # ------------
 # Same as b4_yyerror_args, but with a leading comma.
 m4_define([b4_pure_args],

-[b4_pure_if([b4_location_if([, yylocp])])[]b4_user_args])
+[b4_pure_if([b4_locations_if([, yylocp])])[]b4_user_args])

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

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

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

-[b4_pure_if([b4_location_if([, &yylloc])])[]b4_user_args])
+[b4_pure_if([b4_locations_if([, &yylloc])])[]b4_user_args])

 
 
 # b4_pure_formals
 # ---------------
 # Arguments passed to yyerror: user formals plus yylocp.
 m4_define([b4_pure_formals],
 
 
 # b4_pure_formals
 # ---------------
 # Arguments passed to yyerror: user formals plus yylocp.
 m4_define([b4_pure_formals],

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

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


@@ -143,14 +143,14 @@ m4_define([b4_rhs_location],
 m4_changecom()
 m4_divert(0)dnl
 @output @output_parser_name@
 m4_changecom()
 m4_divert(0)dnl
 @output @output_parser_name@

-b4_copyright([Skeleton parser for GLR parsing with Bison],
+b4_copyright([Skeleton implementation for Bison GLR parsers in C],

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

-/* 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], [],
+m4_if(b4_prefix, [yy], [],

 [/* Substitute the variable and function names.  */
 #define yyparse b4_prefix[]parse
 #define yylex   b4_prefix[]lex
 [/* Substitute the variable and function names.  */
 #define yyparse b4_prefix[]parse
 #define yylex   b4_prefix[]lex


@@ -159,34 +159,37 @@ m4_if(b4_prefix[], [yy], [],
 #define yychar  b4_prefix[]char
 #define yydebug b4_prefix[]debug
 #define yynerrs b4_prefix[]nerrs
 #define yychar  b4_prefix[]char
 #define yydebug b4_prefix[]debug
 #define yynerrs b4_prefix[]nerrs

-#define yylloc  b4_prefix[]lloc])
+#define yylloc  b4_prefix[]lloc])[
+
+/* Copy the first part of user declarations.  */
+]b4_pre_prologue

 
 dnl # b4_shared_declarations
 dnl # ----------------------
 dnl # Declaration that might either go into the header (if --defines)
 dnl # or open coded in the parser body.
 m4_define([b4_shared_declarations],
 
 dnl # b4_shared_declarations
 dnl # ----------------------
 dnl # Declaration that might either go into the header (if --defines)
 dnl # or open coded in the parser body.
 m4_define([b4_shared_declarations],

-[b4_token_enums(b4_tokens)[
+[m4_ifdef([b4_start_header],
+[[/* Copy the %start-header blocks.  */
+]b4_start_header])[]dnl

 
 

-/* Copy the first part of user declarations.  */
-]b4_pre_prologue[
+b4_token_enums(b4_tokens)

 
 

-#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
+[#ifndef YYSTYPE

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

-[typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])
-b4_stype
-/* Line __line__ of glr.c.  */
-b4_syncline([@oline@], [@ofile@])
-       YYSTYPE;],
-[typedef int YYSTYPE;])[
-# define YYSTYPE_IS_DECLARED 1
-# define YYSTYPE_IS_TRIVIAL 1
+[[typedef union ]b4_union_name[
+]b4_user_stype[
+       YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1]],
+[m4_if(b4_tag_seen_flag, 0,
+[[typedef int YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1]])])[

 #endif
 
 #if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
 typedef struct YYLTYPE
 {
 #endif
 
 #if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
 typedef struct YYLTYPE
 {

-]b4_location_if([
+]b4_locations_if([

   int first_line;
   int first_column;
   int last_line;
   int first_line;
   int first_column;
   int last_line;


@@ -198,15 +201,18 @@ typedef struct YYLTYPE
 # define YYLTYPE_IS_DECLARED 1
 # define YYLTYPE_IS_TRIVIAL 1
 #endif
 # define YYLTYPE_IS_DECLARED 1
 # define YYLTYPE_IS_TRIVIAL 1
 #endif

-]])

 
 

-m4_if(b4_defines_flag, 0,
-      [b4_shared_declarations],
-      [#include @output_header_name@])[
+]m4_ifdef([b4_end_header],
+[[/* Copy the %end-header blocks.  */
+]b4_end_header])[]dnl
+])
+
+b4_defines_if([#include @output_header_name@],
+             [b4_shared_declarations])[

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

-# define YYDEBUG ]b4_debug[
+# define YYDEBUG ]b4_debug_flag[

 #endif
 
 /* Enabling verbose error messages.  */
 #endif
 
 /* Enabling verbose error messages.  */


@@ -214,7 +220,7 @@ m4_if(b4_defines_flag, 0,
 # undef YYERROR_VERBOSE
 # define YYERROR_VERBOSE 1
 #else
 # undef YYERROR_VERBOSE
 # define YYERROR_VERBOSE 1
 #else

-# define YYERROR_VERBOSE ]b4_error_verbose[
+# define YYERROR_VERBOSE ]b4_error_verbose_flag[

 #endif
 
 /* Enabling the token table.  */
 #endif
 
 /* Enabling the token table.  */


@@ -230,11 +236,8 @@ m4_if(b4_defines_flag, 0,
 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[

 
 

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

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


@@ -308,7 +311,7 @@ b4_syncline([@oline@], [@ofile@])
 # endif
 #endif
 
 # endif
 #endif
 

-]b4_location_if([#define YYOPTIONAL_LOC(Name) Name],[
+]b4_locations_if([#define YYOPTIONAL_LOC(Name) Name],[

 #ifdef __cplusplus
 # define YYOPTIONAL_LOC(Name) /* empty */
 #else
 #ifdef __cplusplus
 # define YYOPTIONAL_LOC(Name) /* empty */
 #else


@@ -486,7 +489,7 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] =
    If N is 0, then set CURRENT to the empty location which ends
    the previous symbol: RHS[0] (always defined).  */
 
    If N is 0, then set CURRENT to the empty location which ends
    the previous symbol: RHS[0] (always defined).  */
 

-]b4_location_if([[
+]b4_locations_if([[

 #define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
 #ifndef YYLLOC_DEFAULT
 # define YYLLOC_DEFAULT(Current, Rhs, N)                               \
 #define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
 #ifndef YYLLOC_DEFAULT
 # define YYLLOC_DEFAULT(Current, Rhs, N)                               \


@@ -581,7 +584,7 @@ do {                                                                            \
     {                                                                      \
       YYFPRINTF (stderr, "%s ", Title);                                            \
       yy_symbol_print (stderr, Type,                                       \
     {                                                                      \
       YYFPRINTF (stderr, "%s ", Title);                                            \
       yy_symbol_print (stderr, Type,                                       \

-                      Value]b4_location_if([, Location])[]b4_user_args[);  \
+                      Value]b4_locations_if([, Location])[]b4_user_args[);  \

       YYFPRINTF (stderr, "\n");                                                    \
     }                                                                      \
 } while (YYID (0))
       YYFPRINTF (stderr, "\n");                                                    \
     }                                                                      \
 } while (YYID (0))


@@ -622,7 +625,7 @@ int yydebug;
 
 #ifndef YYSTACKEXPANDABLE
 # if (! defined __cplusplus \
 
 #ifndef YYSTACKEXPANDABLE
 # if (! defined __cplusplus \

-      || (]b4_location_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
+      || (]b4_locations_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \

          && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL))
 #  define YYSTACKEXPANDABLE 1
 # else
          && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL))
 #  define YYSTACKEXPANDABLE 1
 # else


@@ -794,7 +797,7 @@ 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(
 [
   yyGLRStackItem yyerror_range[3];]])[
 ]b4_pure_if(
 [


@@ -907,7 +910,7 @@ 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 (yystackp->yyerrState != 0)
+# define YYRECOVERING() (yystackp->yyerrState != 0)

 # undef yyclearin
 # define yyclearin (yychar = YYEMPTY)
 # undef YYFILL
 # undef yyclearin
 # define yyclearin (yychar = YYEMPTY)
 # undef YYFILL


@@ -923,13 +926,11 @@ yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
   else
     *yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval;
   YYLLOC_DEFAULT ((*yylocp), (yyvsp - yyrhslen), yyrhslen);
   else
     *yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval;
   YYLLOC_DEFAULT ((*yylocp), (yyvsp - yyrhslen), yyrhslen);

-]b4_location_if([[  yystackp->yyerror_range[1].yystate.yyloc = *yylocp;
+]b4_locations_if([[  yystackp->yyerror_range[1].yystate.yyloc = *yylocp;

 ]])[
   switch (yyn)
     {
 ]])[
   switch (yyn)
     {

-      ]b4_actions
-/* Line __line__ of glr.c.  */
-b4_syncline([@oline@], [@ofile@])[
+      ]b4_user_actions[

       default: break;
     }
 
       default: break;
     }
 


@@ -973,7 +974,7 @@ yydestroyGLRState (char const *yymsg, yyGLRState *yys]b4_user_formals[)
 {
   if (yys->yyresolved)
     yydestruct (yymsg, yystos[yys->yylrState],
 {
   if (yys->yyresolved)
     yydestruct (yymsg, yystos[yys->yylrState],

-               &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[]b4_user_args[);
+               &yys->yysemantics.yysval]b4_locations_if([, &yys->yyloc])[]b4_user_args[);

   else
     {
 #if YYDEBUG
   else
     {
 #if YYDEBUG


@@ -984,7 +985,7 @@ yydestroyGLRState (char const *yymsg, yyGLRState *yys]b4_user_formals[)
          else
            YYFPRINTF (stderr, "%s incomplete ", yymsg);
          yy_symbol_print (stderr, yystos[yys->yylrState],
          else
            YYFPRINTF (stderr, "%s incomplete ", yymsg);
          yy_symbol_print (stderr, yystos[yys->yylrState],

-                          NULL]b4_location_if([, &yys->yyloc])[]b4_user_args[);
+                          NULL]b4_locations_if([, &yys->yyloc])[]b4_user_args[);

          YYFPRINTF (stderr, "\n");
        }
 #endif
          YYFPRINTF (stderr, "\n");
        }
 #endif


@@ -1392,7 +1393,7 @@ yydoAction (yyGLRStack* yystackp, 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

-       = yystackp->yytops.yystates[yyk];]b4_location_if([[
+       = yystackp->yytops.yystates[yyk];]b4_locations_if([[

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


@@ -1443,7 +1444,7 @@ yy_reduce_print (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
       fprintf (stderr, "   $%d = ", yyi + 1);
       yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
                       &]b4_rhs_value(yynrhs, yyi + 1)[
       fprintf (stderr, "   $%d = ", yyi + 1);
       yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
                       &]b4_rhs_value(yynrhs, yyi + 1)[

-                      ]b4_location_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
+                      ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl

                       b4_user_args[);
       fprintf (stderr, "\n");
     }
                       b4_user_args[);
       fprintf (stderr, "\n");
     }


@@ -1716,7 +1717,7 @@ yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystackp,
       return yyflag;
     }
 
       return yyflag;
     }
 

-  yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred = yyopt->yystate;]b4_location_if([[
+  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;]])[
   if (yynrhs == 0)
     /* Set default location.  */
     yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yyopt->yystate->yyloc;]])[


@@ -1742,7 +1743,7 @@ yyreportTree (yySemanticOption* yyx, int yyindent)
   int yynrhs = yyrhsLength (yyx->yyrule);
   int yyi;
   yyGLRState* yys;
   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)
   yyGLRState yyleftmost_state;
 
   for (yyi = yynrhs, yys = yyx->yystate; 0 < yyi; yyi -= 1, yys = yys->yypred)


@@ -1758,11 +1759,11 @@ yyreportTree (yySemanticOption* yyx, int yyindent)
   if (yyx->yystate->yyposn < yys->yyposn + 1)
     YYFPRINTF (stderr, "%*s%s -> <Rule %d, empty>\n",
               yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
   if (yyx->yystate->yyposn < yys->yyposn + 1)
     YYFPRINTF (stderr, "%*s%s -> <Rule %d, empty>\n",
               yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),

-              yyx->yyrule);
+              yyx->yyrule - 1);

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

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

               (unsigned long int) yyx->yystate->yyposn);
   for (yyi = 1; yyi <= yynrhs; yyi += 1)
     {
               (unsigned long int) yyx->yystate->yyposn);
   for (yyi = 1; yyi <= yynrhs; yyi += 1)
     {


@@ -1803,43 +1804,49 @@ yyreportAmbiguity (yySemanticOption* yyx0,
   return yyabort;
 }
 
   return yyabort;
 }
 

-/** Starting at and including state S, resolve the location for each of the
- *  previous N states that is unresolved.  The first semantic option of a state
+/** Starting at and including state S1, resolve the location for each of the
+ *  previous N1 states that is unresolved.  The first semantic option of a state

  *  is always chosen.  */
 static void
  *  is always chosen.  */
 static void

-yyresolveLocations (yyGLRState* yys, int yyn,
+yyresolveLocations (yyGLRState* yys1, int yyn1,

                    yyGLRStack *yystackp]b4_user_formals[)
 {
                    yyGLRStack *yystackp]b4_user_formals[)
 {

-  if (0 < yyn)
+  if (0 < yyn1)

     {
     {

-      yyresolveLocations (yys->yypred, yyn-1, yystackp]b4_user_args[);
-      if (!yys->yyresolved)
+      yyresolveLocations (yys1->yypred, yyn1 - 1, yystackp]b4_user_args[);
+      if (!yys1->yyresolved)

        {
          yySemanticOption *yyoption;
        {
          yySemanticOption *yyoption;

-         yyGLRStackItem yyrhs[1 + YYMAXRHS];
+         yyGLRStackItem yyrhsloc[1 + YYMAXRHS];

          int yynrhs;
          int yychar_current;
          YYSTYPE yylval_current;
          YYLTYPE yylloc_current;
          int yynrhs;
          int yychar_current;
          YYSTYPE yylval_current;
          YYLTYPE yylloc_current;

-         yyoption = yys->yysemantics.yyfirstVal;
+         yyoption = yys1->yysemantics.yyfirstVal;

          YYASSERT (yyoption != NULL);
          yynrhs = yyrhsLength (yyoption->yyrule);
          if (yynrhs > 0)
            {
              yyGLRState *yys;
          YYASSERT (yyoption != NULL);
          yynrhs = yyrhsLength (yyoption->yyrule);
          if (yynrhs > 0)
            {
              yyGLRState *yys;

-             int yyi;
+             int yyn;

              yyresolveLocations (yyoption->yystate, yynrhs,
                                  yystackp]b4_user_args[);
              yyresolveLocations (yyoption->yystate, yynrhs,
                                  yystackp]b4_user_args[);

-             for (yys = yyoption->yystate, yyi = yynrhs;
-                  yyi >= 1;
-                  yys = yys->yypred, yyi -= 1)
-               yyrhs[yyi].yystate.yyloc = yys->yyloc;
+             for (yys = yyoption->yystate, yyn = yynrhs;
+                  yyn > 0;
+                  yys = yys->yypred, yyn -= 1)
+               yyrhsloc[yyn].yystate.yyloc = yys->yyloc;

            }
          else
            {
            }
          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;
              yyGLRState *yyprevious = yyoption->yystate;

-             YYASSERT (yyprevious->yyresolved);
-             yyrhs[0].yystate.yyloc = yyprevious->yyloc;
+             yyrhsloc[0].yystate.yyloc = yyprevious->yyloc;

            }
          yychar_current = yychar;
          yylval_current = yylval;
            }
          yychar_current = yychar;
          yylval_current = yylval;


@@ -1847,7 +1854,7 @@ yyresolveLocations (yyGLRState* yys, int yyn,
          yychar = yyoption->yyrawchar;
          yylval = yyoption->yyval;
          yylloc = yyoption->yyloc;
          yychar = yyoption->yyrawchar;
          yylval = yyoption->yyval;
          yylloc = yyoption->yyloc;

-         YYLLOC_DEFAULT ((yys->yyloc), yyrhs, yynrhs);
+         YYLLOC_DEFAULT ((yys1->yyloc), yyrhsloc, yynrhs);

          yychar = yychar_current;
          yylval = yylval_current;
          yylloc = yylloc_current;
          yychar = yychar_current;
          yylval = yylval_current;
          yylloc = yylloc_current;


@@ -1929,7 +1936,7 @@ yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)
                  {
                    yydestruct ("Cleanup: discarding incompletely merged value for",
                                yystos[yys->yylrState],
                  {
                    yydestruct ("Cleanup: discarding incompletely merged value for",
                                yystos[yys->yylrState],

-                               &yysval]b4_location_if([, yylocp])[]b4_user_args[);
+                               &yysval]b4_locations_if([, yylocp])[]b4_user_args[);

                    break;
                  }
                yyuserMerge (yymerger[yyp->yyrule], &yysval, &yysval_other);
                    break;
                  }
                yyuserMerge (yymerger[yyp->yyrule], &yysval, &yysval_other);


@@ -2078,7 +2085,7 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 #if YYERROR_VERBOSE
       int yyn;
       yyn = yypact[yystackp->yytops.yystates[0]->yylrState];
 #if YYERROR_VERBOSE
       int yyn;
       yyn = yypact[yystackp->yytops.yystates[0]->yylrState];

-      if (YYPACT_NINF < yyn && yyn < YYLAST)
+      if (YYPACT_NINF < yyn && yyn <= YYLAST)

        {
          yySymbol yytoken = YYTRANSLATE (yychar);
          size_t yysize0 = yytnamerr (NULL, yytokenName (yytoken));
        {
          yySymbol yytoken = YYTRANSLATE (yychar);
          size_t yysize0 = yytnamerr (NULL, yytokenName (yytoken));


@@ -2105,7 +2112,7 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
          int yyxbegin = yyn < 0 ? -yyn : 0;
 
          /* Stay within bounds of both yycheck and yytname.  */
          int yyxbegin = yyn < 0 ? -yyn : 0;
 
          /* Stay within bounds of both yycheck and yytname.  */

-         int yychecklim = YYLAST - yyn;
+         int yychecklim = YYLAST - yyn + 1;

          int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
          int yycount = 1;
 
          int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
          int yycount = 1;
 


@@ -2173,7 +2180,7 @@ 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
 
 /* Recover from a syntax error on *YYSTACKP, assuming that *YYSTACKP->YYTOKENP,
    yylval, and yylloc are the syntactic category, semantic value, and location

-   of the look-ahead.  */
+   of the lookahead.  */

 /*ARGSUSED*/ static void
 yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 {
 /*ARGSUSED*/ static void
 yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 {


@@ -2189,7 +2196,7 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
        if (yychar == YYEOF)
          yyFail (yystackp][]b4_lpure_args[, NULL);
        if (yychar != YYEMPTY)
        if (yychar == YYEOF)
          yyFail (yystackp][]b4_lpure_args[, NULL);
        if (yychar != YYEMPTY)

-         {]b4_location_if([[
+         {]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];
            /* 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];


@@ -2199,7 +2206,7 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
            YYLLOC_DEFAULT ((yys->yyloc), yyerror_range, 2);]])[
            yytoken = YYTRANSLATE (yychar);
            yydestruct ("Error: discarding",
            YYLLOC_DEFAULT ((yys->yyloc), yyerror_range, 2);]])[
            yytoken = YYTRANSLATE (yychar);
            yydestruct ("Error: discarding",

-                       yytoken, &yylval]b4_location_if([, &yylloc])[]b4_user_args[);
+                       yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);

          }
        YYDPRINTF ((stderr, "Reading a token: "));
        yychar = YYLEX;
          }
        YYDPRINTF ((stderr, "Reading a token: "));
        yychar = YYLEX;


@@ -2242,7 +2249,7 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
              && yyisShiftAction (yytable[yyj]))
            {
              /* Shift the error token having adjusted its location.  */
              && yyisShiftAction (yytable[yyj]))
            {
              /* Shift the error token having adjusted its location.  */

-             YYLTYPE yyerrloc;]b4_location_if([[
+             YYLTYPE yyerrloc;]b4_locations_if([[

              yystackp->yyerror_range[2].yystate.yyloc = yylloc;
              YYLLOC_DEFAULT (yyerrloc, (yystackp->yyerror_range), 2);]])[
              YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]],
              yystackp->yyerror_range[2].yystate.yyloc = yylloc;
              YYLLOC_DEFAULT (yyerrloc, (yystackp->yyerror_range), 2);]])[
              YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]],


@@ -2253,8 +2260,9 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
              break;
            }
        }
              break;
            }
        }

-]b4_location_if([[      yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
-      yydestroyGLRState ("Error: popping", yys]b4_user_args[);
+]b4_locations_if([[      yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
+      if (yys->yypred != NULL)
+       yydestroyGLRState ("Error: popping", yys]b4_user_args[);

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


@@ -2295,21 +2303,19 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 
   yychar = YYEMPTY;
   yylval = yyval_default;
 
   yychar = YYEMPTY;
   yylval = yyval_default;

-]b4_location_if([
+]b4_locations_if([

 #if YYLTYPE_IS_TRIVIAL
 #if YYLTYPE_IS_TRIVIAL

-  yylloc.first_line   = yylloc.last_line   = 1;
-  yylloc.first_column = yylloc.last_column = 0;
+  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], [
 m4_pushdef([b4_at_dollar],     [yylloc])dnl
 m4_pushdef([b4_dollar_dollar], [yylval])dnl
   /* User initialization code.  */
 #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
+  b4_user_initial_action

 m4_popdef([b4_dollar_dollar])dnl
 m4_popdef([b4_dollar_dollar])dnl

-m4_popdef([b4_at_dollar])dnl
-/* Line __line__ of glr.c.  */
-b4_syncline([@oline@], [@ofile@])])dnl
+m4_popdef([b4_at_dollar])])dnl

 [
   if (! yyinitGLRStack (yystackp, YYINITDEPTH))
     goto yyexhaustedlab;
 [
   if (! yyinitGLRStack (yystackp, YYINITDEPTH))
     goto yyexhaustedlab;


@@ -2344,7 +2350,7 @@ b4_syncline([@oline@], [@ofile@])])dnl
              yyrule = yydefaultAction (yystate);
              if (yyrule == 0)
                {
              yyrule = yydefaultAction (yystate);
              if (yyrule == 0)
                {

-]b4_location_if([[               yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+]b4_locations_if([[              yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[

                  yyreportSyntaxError (&yystack]b4_user_args[);
                  goto yyuser_error;
                }
                  yyreportSyntaxError (&yystack]b4_user_args[);
                  goto yyuser_error;
                }


@@ -2368,8 +2374,7 @@ b4_syncline([@oline@], [@ofile@])])dnl
              if (yyisShiftAction (yyaction))
                {
                  YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
              if (yyisShiftAction (yyaction))
                {
                  YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);

-                 if (yychar != YYEOF)
-                   yychar = YYEMPTY;
+                 yychar = YYEMPTY;

                  yyposn += 1;
                  yyglrShift (&yystack, 0, yyaction, yyposn, &yylval, &yylloc);
                  if (0 < yystack.yyerrState)
                  yyposn += 1;
                  yyglrShift (&yystack, 0, yyaction, yyposn, &yylval, &yylloc);
                  if (0 < yystack.yyerrState)


@@ -2377,7 +2382,7 @@ b4_syncline([@oline@], [@ofile@])])dnl
                }
              else if (yyisErrorAction (yyaction))
                {
                }
              else if (yyisErrorAction (yyaction))
                {

-]b4_location_if([[               yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+]b4_locations_if([[              yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[

                  yyreportSyntaxError (&yystack]b4_user_args[);
                  goto yyuser_error;
                }
                  yyreportSyntaxError (&yystack]b4_user_args[);
                  goto yyuser_error;
                }


@@ -2423,7 +2428,7 @@ b4_syncline([@oline@], [@ofile@])])dnl
                yyFail (&yystack][]b4_lpure_args[, YY_("syntax error"));
              YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
              YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
                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 = yylloc;]])[
+]b4_locations_if([[          yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[

              yyreportSyntaxError (&yystack]b4_user_args[);
              goto yyuser_error;
            }
              yyreportSyntaxError (&yystack]b4_user_args[);
              goto yyuser_error;
            }


@@ -2485,10 +2490,10 @@ b4_syncline([@oline@], [@ofile@])])dnl
   goto yyreturn;
 
  yyreturn:
   goto yyreturn;
 
  yyreturn:

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

     yydestruct ("Cleanup: discarding lookahead",
                YYTRANSLATE (yychar),
     yydestruct ("Cleanup: discarding lookahead",
                YYTRANSLATE (yychar),

-               &yylval]b4_location_if([, &yylloc])[]b4_user_args[);
+               &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);

 
   /* If the stack is well-formed, pop the stack until it is empty,
      destroying its entries as we go.  But free the stack regardless
 
   /* If the stack is well-formed, pop the stack until it is empty,
      destroying its entries as we go.  But free the stack regardless


@@ -2506,8 +2511,9 @@ b4_syncline([@oline@], [@ofile@])])dnl
                while (yystates[yyk])
                  {
                    yyGLRState *yys = yystates[yyk];
                while (yystates[yyk])
                  {
                    yyGLRState *yys = yystates[yyk];

-]b4_location_if([[                 yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
-)[                 yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
+]b4_locations_if([[                yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
+)[                 if (yys->yypred != NULL)
+                     yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);

                    yystates[yyk] = yys->yypred;
                    yystack.yynextFree -= 1;
                    yystack.yyspaceLeft += 1;
                    yystates[yyk] = yys->yypred;
                    yystack.yynextFree -= 1;
                    yystack.yyspaceLeft += 1;


@@ -2518,7 +2524,8 @@ b4_syncline([@oline@], [@ofile@])])dnl
       yyfreeGLRStack (&yystack);
     }
 
       yyfreeGLRStack (&yystack);
     }
 

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

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


@@ -2579,7 +2586,7 @@ yypdumpstack (yyGLRStack* yystackp)
       else
        {
          fprintf (stderr, "Option. rule: %d, state: %ld, next: %ld",
       else
        {
          fprintf (stderr, "Option. rule: %d, state: %ld, next: %ld",

-                  yyp->yyoption.yyrule,
+                  yyp->yyoption.yyrule - 1,

                   (long int) YYINDEX (yyp->yyoption.yystate),
                   (long int) YYINDEX (yyp->yyoption.yynext));
        }
                   (long int) YYINDEX (yyp->yyoption.yystate),
                   (long int) YYINDEX (yyp->yyoption.yynext));
        }


@@ -2595,19 +2602,16 @@ yypdumpstack (yyGLRStack* yystackp)
 ]
 
 b4_epilogue
 ]
 
 b4_epilogue

-m4_if(b4_defines_flag, 0, [],
+b4_defines_if(

 [@output @output_header_name@
 [@output @output_header_name@

-b4_copyright([Skeleton parser for GLR parsing with Bison],
-            [2002, 2003, 2004, 2005, 2006])[
-
-/* C GLR parser skeleton written by Paul Hilfinger.  */
-]
+b4_copyright([Skeleton interface for Bison GLR parsers in C],
+  [2002, 2003, 2004, 2005, 2006])

 
 b4_shared_declarations
 
 extern YYSTYPE b4_prefix[]lval;
 
 
 b4_shared_declarations
 
 extern YYSTYPE b4_prefix[]lval;
 

-b4_location_if([b4_pure_if([],
+b4_locations_if([b4_pure_if([],

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