xml: also use "%empty" with html output

[bison.git] / data / yacc.c

diff --git a/data/yacc.c b/data/yacc.c
index a15ef770d93f6b2493ab66731d238d60b31f93ce..aed7f06901d33cc52c10130f84a685fceac81739 100644 (file)
--- a/data/yacc.c
+++ b/data/yacc.c
@@ -1,11 +1,11 @@
                                                              -*- C -*-
 # Yacc compatible skeleton for Bison
 
                                                              -*- C -*-
 # Yacc compatible skeleton for Bison
 

-# Copyright (C) 1984, 1989-1990, 2000-2012 Free Software Foundation,
+# Copyright (C) 1984, 1989-1990, 2000-2013 Free Software Foundation,

 # Inc.
 
 m4_pushdef([b4_copyright_years],
 # Inc.
 
 m4_pushdef([b4_copyright_years],

-           [1984, 1989-1990, 2000-2012])
+           [1984, 1989-1990, 2000-2013])

 
 # 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


@@ -67,36 +67,39 @@ m4_define_default([b4_stack_depth_init],  [200])
 ## ------------------------ ##
 
 b4_percent_define_default([[api.pure]], [[false]])
 ## ------------------------ ##
 
 b4_percent_define_default([[api.pure]], [[false]])

-b4_define_flag_if([pure])
-m4_define([b4_pure_flag],
-          [b4_percent_define_flag_if([[api.pure]], [[1]], [[0]])])
-
-# b4_yacc_pure_if(IF-TRUE, IF-FALSE)
-# ----------------------------------
-# Expand IF-TRUE, if %pure-parser and %parse-param, IF-FALSE otherwise.
-m4_define([b4_yacc_pure_if],
-[b4_pure_if([m4_ifset([b4_parse_param],
-                      [$1], [$2])],
-            [$2])])
-
+b4_percent_define_check_values([[[[api.pure]],
+                                 [[false]], [[true]], [[]], [[full]]]])
+
+m4_define([b4_pure_flag], [[0]])
+m4_case(b4_percent_define_get([[api.pure]]),
+        [false], [m4_define([b4_pure_flag], [[0]])],
+        [true],  [m4_define([b4_pure_flag], [[1]])],
+        [],      [m4_define([b4_pure_flag], [[1]])],
+        [full],  [m4_define([b4_pure_flag], [[2]])])
+
+m4_define([b4_pure_if],
+[m4_case(b4_pure_flag,
+         [0], [$2],
+         [1], [$1],
+         [2], [$1])])
+         [m4_fatal([invalid api.pure value: ]$1)])])
+
+# b4_yyerror_arg_loc_if(ARG)
+# --------------------------
+# Expand ARG iff yyerror is to be given a location as argument.
+m4_define([b4_yyerror_arg_loc_if],
+[b4_locations_if([m4_case(b4_pure_flag,
+                          [1], [m4_ifset([b4_parse_param], [$1])],
+                          [2], [$1])])])

 
 # b4_yyerror_args
 # ---------------
 # Arguments passed to yyerror: user args plus yylloc.
 m4_define([b4_yyerror_args],
 
 # b4_yyerror_args
 # ---------------
 # Arguments passed to yyerror: user args plus yylloc.
 m4_define([b4_yyerror_args],

-[b4_yacc_pure_if([b4_locations_if([&yylloc, ])])dnl
+[b4_yyerror_arg_loc_if([&yylloc, ])dnl

 m4_ifset([b4_parse_param], [b4_args(b4_parse_param), ])])
 
 
 m4_ifset([b4_parse_param], [b4_args(b4_parse_param), ])])
 
 

-# b4_lex_param
-# ------------
-# Accumulate in b4_lex_param all the yylex arguments.
-# b4_lex_param arrives quoted twice, but we want to keep only one level.
-m4_define([b4_lex_param],
-m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
-b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl
-m4_ifdef([b4_lex_param], b4_lex_param)))
-

 
 ## ------------ ##
 ## Data Types.  ##
 
 ## ------------ ##
 ## Data Types.  ##


@@ -140,7 +143,6 @@ m4_define([b4_rhs_value],
           [b4_symbol_value([yyvsp@{b4_subtract([$2], [$1])@}], [$3])])
 
 
           [b4_symbol_value([yyvsp@{b4_subtract([$2], [$1])@}], [$3])])
 
 

-

 ## ----------- ##
 ## Locations.  ##
 ## ----------- ##
 ## ----------- ##
 ## Locations.  ##
 ## ----------- ##


@@ -172,12 +174,20 @@ m4_define([b4_declare_scanner_communication_variables], [[
 /* The lookahead symbol.  */
 int yychar;
 
 /* The lookahead symbol.  */
 int yychar;
 

+]b4_pure_if([[

 /* The semantic value of the lookahead symbol.  */
 /* The semantic value of the lookahead symbol.  */

-YYSTYPE yylval;]b4_locations_if([[
+/* Default value used for initialization, for pacifying older GCCs
+   or non-GCC compilers.  */
+YY_INITIAL_VALUE (static YYSTYPE yyval_default;)
+YYSTYPE yylval YY_INITIAL_VALUE (= yyval_default);]b4_locations_if([[

 
 /* Location data for the lookahead symbol.  */
 
 /* Location data for the lookahead symbol.  */

-YYLTYPE yylloc;]])b4_pure_if([], [[
-
+static YYLTYPE yyloc_default]b4_yyloc_default[;
+YYLTYPE yylloc = yyloc_default;]])],
+[[/* The semantic value of the lookahead symbol.  */
+YYSTYPE yylval;]b4_locations_if([[
+/* Location data for the lookahead symbol.  */
+YYLTYPE yylloc]b4_yyloc_default[;]])[

 /* Number of syntax errors so far.  */
 int yynerrs;]])])
 
 /* Number of syntax errors so far.  */
 int yynerrs;]])])
 


@@ -195,9 +205,9 @@ m4_define([b4_declare_parser_state_variables], [b4_pure_if([[
     int yyerrstatus;
 
     /* The stacks and their tools:
     int yyerrstatus;
 
     /* The stacks and their tools:

-       `yyss': related to states.
-       `yyvs': related to semantic values.]b4_locations_if([[
-       `yyls': related to locations.]])[
+       'yyss': related to states.
+       'yyvs': related to semantic values.]b4_locations_if([[
+       'yyls': related to locations.]])[

 
        Refer to the stacks through separate pointers, to allow yyoverflow
        to reallocate them elsewhere.  */
 
        Refer to the stacks through separate pointers, to allow yyoverflow
        to reallocate them elsewhere.  */


@@ -244,7 +254,7 @@ typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
   [[b4_prefix[pstate *ps]], [[ps]]]b4_pure_if([,
   [[[int pushed_char]], [[pushed_char]]],
   [[b4_api_PREFIX[STYPE const *pushed_val]], [[pushed_val]]]b4_locations_if([,
   [[b4_prefix[pstate *ps]], [[ps]]]b4_pure_if([,
   [[[int pushed_char]], [[pushed_char]]],
   [[b4_api_PREFIX[STYPE const *pushed_val]], [[pushed_val]]]b4_locations_if([,

-  [[b4_api_PREFIX[LTYPE const *pushed_loc]], [[pushed_loc]]]])])m4_ifset([b4_parse_param], [,
+  [[b4_api_PREFIX[LTYPE *pushed_loc]], [[pushed_loc]]]])])m4_ifset([b4_parse_param], [,

   b4_parse_param]))
 b4_pull_if([b4_function_declare([b4_prefix[pull_parse]], [[int]],
   [[b4_prefix[pstate *ps]], [[ps]]]m4_ifset([b4_parse_param], [,
   b4_parse_param]))
 b4_pull_if([b4_function_declare([b4_prefix[pull_parse]], [[int]],
   [[b4_prefix[pstate *ps]], [[ps]]]m4_ifset([b4_parse_param], [,


@@ -289,10 +299,7 @@ m4_define([b4_shared_declarations],
 ## 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@)@
+b4_output_begin([b4_parser_file_name])

 b4_copyright([Bison implementation for Yacc-like parsers in C])[
 
 /* C LALR(1) parser skeleton written by Richard Stallman, by
 b4_copyright([Bison implementation for Yacc-like parsers in C])[
 
 /* C LALR(1) parser skeleton written by Richard Stallman, by


@@ -321,11 +328,12 @@ m4_if(b4_api_prefix, [yy], [],
 #define yypstate        ]b4_prefix[pstate]])[
 #define yylex           ]b4_prefix[lex
 #define yyerror         ]b4_prefix[error
 #define yypstate        ]b4_prefix[pstate]])[
 #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 yydebug         ]b4_prefix[debug

-#define yynerrs         ]b4_prefix[nerrs]b4_locations_if([[
-#define yylloc          ]b4_prefix[lloc]])])[
+#define yynerrs         ]b4_prefix[nerrs
+]]b4_pure_if([], [[
+#define yylval          ]b4_prefix[lval
+#define yychar          ]b4_prefix[char]b4_locations_if([[
+#define yylloc          ]b4_prefix[lloc]])]))[

 
 /* Copy the first part of user declarations.  */
 ]b4_user_pre_prologue[
 
 /* Copy the first part of user declarations.  */
 ]b4_user_pre_prologue[


@@ -340,9 +348,11 @@ m4_if(b4_api_prefix, [yy], [],
 # define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
 #endif
 
 # define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
 #endif
 

-/* In a future release of Bison, this section will be replaced
+]m4_ifval(m4_quote(b4_spec_defines_file),
+[[/* In a future release of Bison, this section will be replaced

    by #include "@basename(]b4_spec_defines_file[@)".  */
    by #include "@basename(]b4_spec_defines_file[@)".  */

-]b4_shared_declarations[
+]])dnl
+b4_shared_declarations[

 
 /* Copy the second part of user declarations.  */
 ]b4_user_post_prologue
 
 /* Copy the second part of user declarations.  */
 ]b4_user_post_prologue


@@ -395,20 +405,15 @@ typedef short int yytype_int16;
 # if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS
 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
 # if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS
 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */

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

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

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

 # endif
 #endif
 
 # endif
 #endif
 

-/* Suppress unused-variable warnings by "using" E.  */
-#ifdef __GNUC__
-# define YYUSE(e) ((void) (e))
-#else
-# define YYUSE(e) /* empty */
-#endif
+]b4_attribute_define[

 
 #if ]b4_lac_if([[1]], [[! defined yyoverflow || YYERROR_VERBOSE]])[
 
 
 #if ]b4_lac_if([[1]], [[! defined yyoverflow || YYERROR_VERBOSE]])[
 


@@ -440,7 +445,7 @@ b4_push_if([], [b4_lac_if([], [[
 # endif]])])[
 
 # ifdef YYSTACK_ALLOC
 # endif]])])[
 
 # ifdef YYSTACK_ALLOC

-   /* Pacify GCC's `empty if-body' warning.  */
+   /* Pacify GCC's 'empty if-body' warning.  */

 #  define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
 #  ifndef YYSTACK_ALLOC_MAXIMUM
     /* The OS might guarantee only one guard page at the bottom of the stack,
 #  define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
 #  ifndef YYSTACK_ALLOC_MAXIMUM
     /* The OS might guarantee only one guard page at the bottom of the stack,


@@ -577,7 +582,7 @@ static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
 
 #if ]b4_api_PREFIX[DEBUG
 ]b4_integral_parser_table_define([rline], [b4_rline],
 
 #if ]b4_api_PREFIX[DEBUG
 ]b4_integral_parser_table_define([rline], [b4_rline],

-     [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[
+     [[YYRLINE[YYN] -- Source line where rule number YYN was defined.]])[

 #endif
 
 #if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[
 #endif
 
 #if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[


@@ -600,13 +605,13 @@ static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
 
 #define YYPACT_NINF ]b4_pact_ninf[
 
 
 #define YYPACT_NINF ]b4_pact_ninf[
 

-#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])[

 
 #define YYTABLE_NINF ]b4_table_ninf[
 
 
 #define YYTABLE_NINF ]b4_table_ninf[
 

-#define yytable_value_is_error(yytable_value) \
-  ]b4_table_value_equals([[table]], [[yytable_value]], [b4_table_ninf])[
+#define yytable_value_is_error(Yytable_value) \
+  ]b4_table_value_equals([[table]], [[Yytable_value]], [b4_table_ninf])[

 
 ]b4_parser_tables_define[
 
 
 ]b4_parser_tables_define[
 


@@ -640,44 +645,14 @@ do                                                              \
     }                                                           \
 while (0)
 
     }                                                           \
 while (0)
 

-
+/* Error token number */

 #define YYTERROR        1
 #define YYERRCODE       256
 
 ]b4_locations_if([[
 ]b4_yylloc_default_define[
 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
 #define YYTERROR        1
 #define YYERRCODE       256
 
 ]b4_locations_if([[
 ]b4_yylloc_default_define[
 #define YYRHSLOC(Rhs, K) ((Rhs)[K])

-
-/* YY_LOCATION_PRINT -- Print the location on the stream.
-   This macro was not mandated originally: define only if we know
-   we won't break user code: when these are the locations we know.  */
-
-#ifndef YY_LOCATION_PRINT
-# if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL
-#  define YY_LOCATION_PRINT(File, Loc)                  \
-     fprintf (File, "%d.%d-%d.%d",                      \
-              (Loc).first_line, (Loc).first_column,     \
-              (Loc).last_line,  (Loc).last_column)
-# else
-#  define YY_LOCATION_PRINT(File, Loc) ((void) 0)
-# endif
-#endif]], [[
-
-
-/* This macro is provided for backward compatibility. */
-
-#ifndef YY_LOCATION_PRINT
-# define YY_LOCATION_PRINT(File, Loc) ((void) 0)
-#endif]])[
-
-
-/* YYLEX -- calling `yylex' with the right arguments.  */
-
-#ifdef YYLEX_PARAM
-# define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
-#else
-# define YYLEX ]b4_function_call([yylex], [int], b4_lex_param)[
-#endif
+]])[

 
 /* Enable debugging if requested.  */
 #if ]b4_api_PREFIX[DEBUG
 
 /* Enable debugging if requested.  */
 #if ]b4_api_PREFIX[DEBUG


@@ -693,6 +668,8 @@ do {                                            \
     YYFPRINTF Args;                             \
 } while (0)
 
     YYFPRINTF Args;                             \
 } while (0)
 

+]b4_yy_location_print_define[
+

 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)                    \
 do {                                                                      \
   if (yydebug)                                                            \
 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)                    \
 do {                                                                      \
   if (yydebug)                                                            \


@@ -1131,12 +1108,11 @@ yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
                 ]b4_lac_if([[yytype_int16 *yyesa, yytype_int16 **yyes,
                 YYSIZE_T *yyes_capacity, ]])[yytype_int16 *yyssp, int yytoken)
 {
                 ]b4_lac_if([[yytype_int16 *yyesa, yytype_int16 **yyes,
                 YYSIZE_T *yyes_capacity, ]])[yytype_int16 *yyssp, int yytoken)
 {

-  YYSIZE_T yysize0 = yytnamerr (YY_NULL, yytname[yytoken]);
+  YYSIZE_T yysize0 = yytnamerr (YY_NULLPTR, yytname[yytoken]);

   YYSIZE_T yysize = yysize0;
   YYSIZE_T yysize = yysize0;

-  YYSIZE_T yysize1;

   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


@@ -1210,11 +1186,13 @@ yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
                     break;
                   }
                 yyarg[yycount++] = yytname[yyx];
                     break;
                   }
                 yyarg[yycount++] = yytname[yyx];

-                yysize1 = yysize + yytnamerr (YY_NULL, yytname[yyx]);
-                if (! (yysize <= yysize1
-                       && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
-                  return 2;
-                yysize = yysize1;
+                {
+                  YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULLPTR, yytname[yyx]);
+                  if (! (yysize <= yysize1
+                         && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+                    return 2;
+                  yysize = yysize1;
+                }

               }
         }]b4_lac_if([[
 # if ]b4_api_PREFIX[DEBUG
               }
         }]b4_lac_if([[
 # if ]b4_api_PREFIX[DEBUG


@@ -1238,10 +1216,12 @@ yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
 # undef YYCASE_
     }
 
 # undef YYCASE_
     }
 

-  yysize1 = yysize + yystrlen (yyformat);
-  if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
-    return 2;
-  yysize = yysize1;
+  {
+    YYSIZE_T yysize1 = yysize + yystrlen (yyformat);
+    if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+      return 2;
+    yysize = yysize1;
+  }

 
   if (*yymsg_alloc < yysize)
     {
 
   if (*yymsg_alloc < yysize)
     {


@@ -1291,7 +1271,7 @@ static char yypstate_allocated = 0;]])b4_pull_if([
 
 b4_function_define([[yyparse]], [[int]], b4_parse_param)[
 {
 
 b4_function_define([[yyparse]], [[int]], b4_parse_param)[
 {

-  return yypull_parse (YY_NULL]m4_ifset([b4_parse_param],
+  return yypull_parse (YY_NULLPTR]m4_ifset([b4_parse_param],

                                   [[, ]b4_args(b4_parse_param)])[);
 }
 
                                   [[, ]b4_args(b4_parse_param)])[);
 }
 


@@ -1303,7 +1283,8 @@ b4_function_define([[yyparse]], [[int]], b4_parse_param)[
   yypstate *yyps_local;]b4_pure_if([[
   int yychar;
   YYSTYPE yylval;]b4_locations_if([[
   yypstate *yyps_local;]b4_pure_if([[
   int yychar;
   YYSTYPE yylval;]b4_locations_if([[

-  YYLTYPE yylloc;]])])[
+  static YYLTYPE yyloc_default][]b4_yyloc_default[;
+  YYLTYPE yylloc = yyloc_default;]])])[

   if (yyps)
     yyps_local = yyps;
   else
   if (yyps)
     yyps_local = yyps;
   else


@@ -1318,7 +1299,7 @@ b4_function_define([[yyparse]], [[int]], b4_parse_param)[
         }
     }
   do {
         }
     }
   do {

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

     yystatus =
       yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_args(b4_parse_param)])[);
   } while (yystatus == YYPUSH_MORE);
     yystatus =
       yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_args(b4_parse_param)])[);
   } while (yystatus == YYPUSH_MORE);


@@ -1332,10 +1313,10 @@ b4_function_define([[yyparse]], [[int]], b4_parse_param)[
 {
   yypstate *yyps;]b4_pure_if([], [[
   if (yypstate_allocated)
 {
   yypstate *yyps;]b4_pure_if([], [[
   if (yypstate_allocated)

-    return YY_NULL;]])[
+    return YY_NULLPTR;]])[

   yyps = (yypstate *) malloc (sizeof *yyps);
   if (!yyps)
   yyps = (yypstate *) malloc (sizeof *yyps);
   if (!yyps)

-    return YY_NULL;
+    return YY_NULLPTR;

   yyps->yynew = 1;]b4_pure_if([], [[
   yypstate_allocated = 1;]])[
   return yyps;
   yyps->yynew = 1;]b4_pure_if([], [[
   yypstate_allocated = 1;]])[
   return yyps;


@@ -1383,7 +1364,7 @@ b4_function_define([[yyparse]], [[int]], b4_parse_param)[
   [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
   [[[int yypushed_char]], [[yypushed_char]]],
   [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
   [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
   [[[int yypushed_char]], [[yypushed_char]]],
   [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,

-  [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
+  [[[YYLTYPE *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,

   b4_parse_param]))], [[
 
 
   b4_parse_param]))], [[
 
 


@@ -1429,9 +1410,9 @@ b4_function_define([[yyparse]], [[int]], b4_parse_param)[
       goto yyread_pushed_token;
     }]])[
 
       goto yyread_pushed_token;
     }]])[
 

-  yyss = yyssa;
-  yyvs = yyvsa;]b4_locations_if([[
-  yyls = yylsa;]])[
+  yyssp = yyss = yyssa;
+  yyvsp = yyvs = yyvsa;]b4_locations_if([[
+  yylsp = yyls = yylsa;]])[

   yystacksize = YYINITDEPTH;]b4_lac_if([[
 
   yyes = yyesa;
   yystacksize = YYINITDEPTH;]b4_lac_if([[
 
   yyes = yyesa;


@@ -1445,30 +1426,16 @@ b4_function_define([[yyparse]], [[int]], b4_parse_param)[
   yyerrstatus = 0;
   yynerrs = 0;
   yychar = YYEMPTY; /* Cause a token to be read.  */
   yyerrstatus = 0;
   yynerrs = 0;
   yychar = YYEMPTY; /* Cause a token to be read.  */

-
-  /* Initialize stack pointers.
-     Waste one element of value and location stack
-     so that they stay on the same level as the state stack.
-     The wasted elements are never initialized.  */
-  yyssp = yyss;
-  yyvsp = yyvs;]b4_locations_if([[
-  yylsp = yyls;
-
-#if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL
-  /* Initialize the default location before parsing starts.  */
-  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_ifdef([b4_initial_action], [

 b4_dollar_pushdef([m4_define([b4_dollar_dollar_used])yylval], [],
 b4_dollar_pushdef([m4_define([b4_dollar_dollar_used])yylval], [],

-                  [m4_define([b4_at_dollar_used])yylloc])dnl
+                  [b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])])dnl

 /* User initialization code.  */
 b4_user_initial_action
 b4_dollar_popdef[]dnl
 m4_ifdef([b4_dollar_dollar_used],[[  yyvsp[0] = yylval;
 /* User initialization code.  */
 b4_user_initial_action
 b4_dollar_popdef[]dnl
 m4_ifdef([b4_dollar_dollar_used],[[  yyvsp[0] = yylval;

-]])dnl
-m4_ifdef([b4_at_dollar_used], [[  yylsp[0] = yylloc;

 ]])])dnl
 ]])])dnl

+b4_locations_if([[  yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])[;
+]])dnl

 [  goto yysetstate;
 
 /*------------------------------------------------------------.
 [  goto yysetstate;
 
 /*------------------------------------------------------------.


@@ -1593,7 +1560,7 @@ yyread_pushed_token:]])[
         yylval = *yypushed_val;]b4_locations_if([[
       if (yypushed_loc)
         yylloc = *yypushed_loc;]])])], [[
         yylval = *yypushed_val;]b4_locations_if([[
       if (yypushed_loc)
         yylloc = *yypushed_loc;]])])], [[

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

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


@@ -1639,7 +1606,9 @@ yyread_pushed_token:]])[
   YY_LAC_DISCARD ("shift");]])[
 
   yystate = yyn;
   YY_LAC_DISCARD ("shift");]])[
 
   yystate = yyn;

+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN

   *++yyvsp = yylval;
   *++yyvsp = yylval;

+  YY_IGNORE_MAYBE_UNINITIALIZED_END

 ]b4_locations_if([  *++yylsp = yylloc;])[
   goto yynewstate;
 
 ]b4_locations_if([  *++yylsp = yylloc;])[
   goto yynewstate;
 


@@ -1662,7 +1631,7 @@ yyreduce:
   yylen = yyr2[yyn];
 
   /* If YYLEN is nonzero, implement the default value of the action:
   yylen = yyr2[yyn];
 
   /* If YYLEN is nonzero, implement the default value of the action:

-     `$$ = $1'.
+     '$$ = $1'.

 
      Otherwise, the following line sets YYVAL to garbage.
      This behavior is undocumented and Bison
 
      Otherwise, the following line sets YYVAL to garbage.
      This behavior is undocumented and Bison


@@ -1710,7 +1679,7 @@ yyreduce:
   *++yyvsp = yyval;]b4_locations_if([
   *++yylsp = yyloc;])[
 
   *++yyvsp = yyval;]b4_locations_if([
   *++yylsp = yyloc;])[
 

-  /* Now `shift' the result of the reduction.  Determine what state
+  /* Now 'shift' the result of the reduction.  Determine what state

      that goes to, based on the state we popped back to and the rule
      number reduced by.  */
 
      that goes to, based on the state we popped back to and the rule
      number reduced by.  */
 


@@ -1814,7 +1783,7 @@ yyerrorlab:
      goto yyerrorlab;
 
 ]b4_locations_if([[  yyerror_range[1] = yylsp[1-yylen];
      goto yyerrorlab;
 
 ]b4_locations_if([[  yyerror_range[1] = yylsp[1-yylen];

-]])[  /* Do not reclaim the symbols of the rule which action triggered
+]])[  /* Do not reclaim the symbols of the rule whose action triggered

      this YYERROR.  */
   YYPOPSTACK (yylen);
   yylen = 0;
      this YYERROR.  */
   YYPOPSTACK (yylen);
   yylen = 0;


@@ -1859,7 +1828,9 @@ yyerrlab1:
      current lookahead token, the shift below will for sure.  */
   YY_LAC_DISCARD ("error recovery");]])[
 
      current lookahead token, the shift below will for sure.  */
   YY_LAC_DISCARD ("error recovery");]])[
 

+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN

   *++yyvsp = yylval;
   *++yyvsp = yylval;

+  YY_IGNORE_MAYBE_UNINITIALIZED_END

 ]b4_locations_if([[
   yyerror_range[2] = yylloc;
   /* Using YYLLOC is tempting, but would change the location of
 ]b4_locations_if([[
   yyerror_range[2] = yylloc;
   /* Using YYLLOC is tempting, but would change the location of


@@ -1907,7 +1878,7 @@ yyreturn:
       yydestruct ("Cleanup: discarding lookahead",
                   yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
     }
       yydestruct ("Cleanup: discarding lookahead",
                   yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
     }

-  /* Do not reclaim the symbols of the rule which action triggered
+  /* Do not reclaim the symbols of the rule whose action triggered

      this YYABORT or YYACCEPT.  */
   YYPOPSTACK (yylen);
   YY_STACK_PRINT (yyss, yyssp);
      this YYABORT or YYACCEPT.  */
   YYPOPSTACK (yylen);
   YY_STACK_PRINT (yyss, yyssp);


@@ -1933,11 +1904,12 @@ yypushreturn:]])[
   return yyresult;
 }
 ]b4_epilogue[]dnl
   return yyresult;
 }
 ]b4_epilogue[]dnl

+b4_output_end()
+

 b4_defines_if(
 b4_defines_if(

-[@output(b4_spec_defines_file@)@
-b4_copyright([Bison interface for Yacc-like parsers in C])[
+[b4_output_begin([b4_spec_defines_file])[
+]b4_copyright([Bison interface for Yacc-like parsers in C])[

 
 ]b4_shared_declarations[
 
 ]b4_shared_declarations[

-]])dnl b4_defines_if
-m4_divert_pop(0)
-m4_popdef([b4_copyright_years])
+]b4_output_end()
+])# b4_defines_if