tests: enhance AT_SYNCLINES_COMPILE.

[bison.git] / data / yacc.c

diff --git a/data/yacc.c b/data/yacc.c
index 7e94146e088e5c0f5b08f3347a2ef29d53d56ef8..5efef5f85e7b5b041c4cbcadfe7387e1ade758ab 100644 (file)
--- a/data/yacc.c
+++ b/data/yacc.c
@@ -1,9 +1,11 @@
                                                              -*- C -*-
                                                              -*- C -*-

-

 # Yacc compatible skeleton for Bison
 
 # Yacc compatible skeleton for Bison
 

-# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
-# 2007, 2008 Free Software Foundation, Inc.
+# Copyright (C) 1984, 1989-1990, 2000-2010 Free Software Foundation,
+# Inc.
+
+m4_pushdef([b4_copyright_years],
+           [1984, 1989-1990, 2000-2010])

 
 # 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


@@ -18,13 +20,13 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 

-# Check the value of %define api.push_pull.
-b4_percent_define_default([[api.push_pull]], [[pull]])
-b4_percent_define_check_values([[[[api.push_pull]],
-                               [[pull]], [[push]], [[both]]]])
+# Check the value of %define api.push-pull.
+b4_percent_define_default([[api.push-pull]], [[pull]])
+b4_percent_define_check_values([[[[api.push-pull]],
+                                 [[pull]], [[push]], [[both]]]])

 b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]])
 b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]])
 b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]])
 b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]])

-m4_case(b4_percent_define_get([[api.push_pull]]),
+m4_case(b4_percent_define_get([[api.push-pull]]),

         [pull], [m4_define([b4_push_flag], [[0]])],
         [push], [m4_define([b4_pull_flag], [[0]])])
 
         [pull], [m4_define([b4_push_flag], [[0]])],
         [push], [m4_define([b4_pull_flag], [[0]])])
 


@@ -114,7 +116,7 @@ m4_define([b4_int_type],
 # --------------------
 # Expansion of $<TYPE>$.
 m4_define([b4_lhs_value],
 # --------------------
 # Expansion of $<TYPE>$.
 m4_define([b4_lhs_value],

-[(yyval[]m4_ifval([$1], [.$1]))])
+[b4_symbol_value(yyval, [$1])])

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


@@ -122,7 +124,7 @@ 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],

-[(yyvsp@{($2) - ($1)@}m4_ifval([$3], [.$3]))])
+          [b4_symbol_value([yyvsp@{b4_subtract([$2], [$1])@}], [$3])])

 
 
 
 
 
 


@@ -142,8 +144,70 @@ 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],

-[(yylsp@{($2) - ($1)@})])
+          [(yylsp@{b4_subtract([$2], [$1])@})])
+
+
+## ------------------ ##
+## Parser variables.  ##
+## ------------------ ##
+
+# b4_declare_scanner_communication_variables
+# ------------------------------------------
+# Declare the variables that are global, or local to YYPARSE if
+# pure-parser.
+m4_define([b4_declare_scanner_communication_variables], [[
+/* The lookahead symbol.  */
+int yychar;
+
+/* The semantic value of the lookahead symbol.  */
+YYSTYPE yylval;]b4_locations_if([[
+
+/* Location data for the lookahead symbol.  */
+YYLTYPE yylloc;]])b4_pure_if([], [[
+
+/* Number of syntax errors so far.  */
+int yynerrs;]])])
+
+
+# b4_declare_parser_state_variables
+# ---------------------------------
+# Declare all the variables that are needed to maintain the parser state
+# between calls to yypush_parse.
+m4_define([b4_declare_parser_state_variables], [b4_pure_if([[
+    /* Number of syntax errors so far.  */
+    int yynerrs;
+]])[
+    int yystate;
+    /* Number of tokens to shift before error messages enabled.  */
+    int yyerrstatus;

 
 

+    /* The stacks and their tools:
+       `yyss': related to states.
+       `yyvs': related to semantic values.]b4_locations_if([[
+       `yyls': related to locations.]])[
+
+       Refer to the stacks thru separate pointers, to allow yyoverflow
+       to reallocate them elsewhere.  */
+
+    /* The state stack.  */
+    yytype_int16 yyssa[YYINITDEPTH];
+    yytype_int16 *yyss;
+    yytype_int16 *yyssp;
+
+    /* The semantic value stack.  */
+    YYSTYPE yyvsa[YYINITDEPTH];
+    YYSTYPE *yyvs;
+    YYSTYPE *yyvsp;]b4_locations_if([[
+
+    /* The location stack.  */
+    YYLTYPE yylsa[YYINITDEPTH];
+    YYLTYPE *yyls;
+    YYLTYPE *yylsp;
+
+    /* The locations where the error started and ended.  */
+    YYLTYPE yyerror_range[3];]])[
+
+    YYSIZE_T yystacksize;]])

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


@@ -153,9 +217,8 @@ m4_define([b4_rhs_location],
 # We do want M4 expansion after # for CPP macros.
 m4_changecom()
 m4_divert_push(0)dnl
 # We do want M4 expansion after # for CPP macros.
 m4_changecom()
 m4_divert_push(0)dnl

-@output(b4_parser_file_name@)
-b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl '
-  [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])[
+@output(b4_parser_file_name@)@
+b4_copyright([Implementation for Bison's Yacc-like parsers in C])[

 
 /* C LALR(1) parser skeleton written by Richard Stallman, by
    simplifying the original so-called "semantic" parser.  */
 
 /* C LALR(1) parser skeleton written by Richard Stallman, by
    simplifying the original so-called "semantic" parser.  */


@@ -170,14 +233,14 @@ b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl '
 ]b4_identification
 b4_percent_code_get([[top]])[]dnl
 m4_if(b4_prefix, [yy], [],
 ]b4_identification
 b4_percent_code_get([[top]])[]dnl
 m4_if(b4_prefix, [yy], [],

-[[/* Substitute the variable and function names.  */
-]b4_pull_if([[#define yyparse         ]b4_prefix[parse
-]])b4_push_if([[#define yypush_parse    ]b4_prefix[push_parse
-]b4_pull_if([[#define yypull_parse    ]b4_prefix[pull_parse
-]])[#define yypstate_new    ]b4_prefix[pstate_new
+[[/* Substitute the variable and function names.  */]b4_pull_if([[
+#define yyparse         ]b4_prefix[parse]])b4_push_if([[
+#define yypush_parse    ]b4_prefix[push_parse]b4_pull_if([[
+#define yypull_parse    ]b4_prefix[pull_parse]])[
+#define yypstate_new    ]b4_prefix[pstate_new

 #define yypstate_delete ]b4_prefix[pstate_delete
 #define yypstate_delete ]b4_prefix[pstate_delete

-#define yypstate        ]b4_prefix[pstate
-]])[#define yylex           ]b4_prefix[lex
+#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 yyerror         ]b4_prefix[error
 #define yylval          ]b4_prefix[lval
 #define yychar          ]b4_prefix[char


@@ -190,7 +253,7 @@ m4_if(b4_prefix, [yy], [],
 
 /* Enabling traces.  */
 #ifndef YYDEBUG
 
 /* Enabling traces.  */
 #ifndef YYDEBUG

-# define YYDEBUG ]b4_debug_flag[
+# define YYDEBUG ]b4_parse_trace_if([1], [0])[

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


@@ -198,7 +261,7 @@ m4_if(b4_prefix, [yy], [],
 # 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
 
 /* Enabling the token table.  */
 #endif
 
 /* Enabling the token table.  */


@@ -310,7 +373,7 @@ typedef short int yytype_int16;
 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
 
 #ifndef YY_
 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
 
 #ifndef YY_

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

 #  if ENABLE_NLS
 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
 #   define YY_(msgid) dgettext ("bison-runtime", msgid)
 #  if ENABLE_NLS
 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
 #   define YY_(msgid) dgettext ("bison-runtime", msgid)


@@ -480,41 +543,27 @@ union yyalloc
 #define YYNNTS  ]b4_nterms_number[
 /* YYNRULES -- Number of rules.  */
 #define YYNRULES  ]b4_rules_number[
 #define YYNNTS  ]b4_nterms_number[
 /* YYNRULES -- Number of rules.  */
 #define YYNRULES  ]b4_rules_number[

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

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

-/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
+/* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned
+   by yylex, with out-of-bounds checking.  */

 #define YYUNDEFTOK  ]b4_undef_token_number[
 #define YYMAXUTOK   ]b4_user_token_number_max[
 
 #define YYTRANSLATE(YYX)                                               \
   ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
 
 #define YYUNDEFTOK  ]b4_undef_token_number[
 #define YYMAXUTOK   ]b4_user_token_number_max[
 
 #define YYTRANSLATE(YYX)                                               \
   ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
 

-/* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX.  */
+/* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
+   as returned by yylex, without out-of-bounds checking.  */

 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
 {
   ]b4_translate[
 };
 
 #if YYDEBUG
 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
 {
   ]b4_translate[
 };
 
 #if YYDEBUG

-/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
-   YYRHS.  */
-static const ]b4_int_type_for([b4_prhs])[ yyprhs[] =
-{
-  ]b4_prhs[
-};
-
-/* YYRHS -- A `-1'-separated list of the rules' RHS.  */
-static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =
-{
-  ]b4_rhs[
-};
-
-/* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
-static const ]b4_int_type_for([b4_rline])[ yyrline[] =
-{
-  ]b4_rline[
-};
+]b4_integral_parser_table_define([rline], [b4_rline],
+     [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[

 #endif
 
 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
 #endif
 
 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE


@@ -527,75 +576,25 @@ static const char *const yytname[] =
 #endif
 
 # ifdef YYPRINT
 #endif
 
 # ifdef YYPRINT

-/* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to
-   token YYLEX-NUM.  */
+/* YYTOKNUM[NUM] -- (External) token number corresponding to the
+   (internal) symbol number NUM (which must be that of a token).  */

 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
 {
   ]b4_toknum[
 };
 # endif
 
 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
 {
   ]b4_toknum[
 };
 # endif
 

-/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
-static const ]b4_int_type_for([b4_r1])[ yyr1[] =
-{
-  ]b4_r1[
-};
-
-/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
-static const ]b4_int_type_for([b4_r2])[ yyr2[] =
-{
-  ]b4_r2[
-};
-
-/* YYDEFACT[STATE-NAME] -- Default rule to reduce with in state
-   STATE-NUM 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[
-};
-
-/* YYDEFGOTO[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[
 #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[
-};
+#define yypact_value_is_default(yystate) \
+  ]b4_table_value_equals([[pact]], [[yystate]], [b4_pact_ninf])[

 
 

-/* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
-   positive, shift that token.  If negative, reduce the rule which
-   number is the opposite.  If zero, do what YYDEFACT says.
-   If YYTABLE_NINF, syntax error.  */

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

-static const ]b4_int_type_for([b4_table])[ yytable[] =
-{
-  ]b4_table[
-};

 
 

-static const ]b4_int_type_for([b4_check])[ yycheck[] =
-{
-  ]b4_check[
-};
+#define yytable_value_is_error(yytable_value) \
+  ]b4_table_value_equals([[table]], [[yytable_value]], [b4_table_ninf])[

 
 

-/* 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[
-};
+]b4_parser_tables_define[

 
 #define yyerrok                (yyerrstatus = 0)
 #define yyclearin      (yychar = YYEMPTY)
 
 #define yyerrok                (yyerrstatus = 0)
 #define yyclearin      (yychar = YYEMPTY)


@@ -609,9 +608,18 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] =
 
 /* Like YYERROR except do call yyerror.  This remains here temporarily
    to ease the transition to the new meaning of YYERROR, for GCC.
 
 /* Like YYERROR except do call yyerror.  This remains here temporarily
    to ease the transition to the new meaning of YYERROR, for GCC.

-   Once GCC version 2 has supplanted version 1, this can go.  */
+   Once GCC version 2 has supplanted version 1, this can go.  However,
+   YYFAIL appears to be in use.  Nevertheless, it is formally deprecated
+   in Bison 2.4.2's NEWS entry, where a plan to phase it out is
+   discussed.  */

 
 #define YYFAIL         goto yyerrlab
 
 #define YYFAIL         goto yyerrlab

+#if defined YYFAIL
+  /* This is here to suppress warnings from the GCC cpp's
+     -Wunused-macros.  Normally we don't worry about that warning, but
+     some users do, and we want to make it easy for users to remove
+     YYFAIL uses, which will produce warnings from Bison 2.5.  */
+#endif

 
 #define YYRECOVERING()  (!!yyerrstatus)
 
 
 #define YYRECOVERING()  (!!yyerrstatus)
 


@@ -621,7 +629,6 @@ do                                                          \
     {                                                          \
       yychar = (Token);                                                \
       yylval = (Value);                                                \
     {                                                          \
       yychar = (Token);                                                \
       yylval = (Value);                                                \

-      yytoken = YYTRANSLATE (yychar);                          \

       YYPOPSTACK (1);                                          \
       goto yybackup;                                           \
     }                                                          \
       YYPOPSTACK (1);                                          \
       goto yybackup;                                           \
     }                                                          \


@@ -660,7 +667,7 @@ while (YYID (0))
            YYRHSLOC (Rhs, 0).last_column;                              \
        }                                                               \
     while (YYID (0))
            YYRHSLOC (Rhs, 0).last_column;                              \
        }                                                               \
     while (YYID (0))

-#endif
+#endif]b4_locations_if([[

 
 
 /* YY_LOCATION_PRINT -- Print the location on the stream.
 
 
 /* YY_LOCATION_PRINT -- Print the location on the stream.


@@ -668,7 +675,7 @@ while (YYID (0))
    we won't break user code: when these are the locations we know.  */
 
 #ifndef YY_LOCATION_PRINT
    we won't break user code: when these are the locations we know.  */
 
 #ifndef YY_LOCATION_PRINT

-# if YYLTYPE_IS_TRIVIAL
+# if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL

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


@@ -676,7 +683,14 @@ while (YYID (0))
 # else
 #  define YY_LOCATION_PRINT(File, Loc) ((void) 0)
 # endif
 # else
 #  define YY_LOCATION_PRINT(File, Loc) ((void) 0)
 # endif

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


@@ -744,24 +758,26 @@ do {                                                              \
 `------------------------------------------------*/
 
 ]b4_c_function_def([yy_reduce_print], [static void],
 `------------------------------------------------*/
 
 ]b4_c_function_def([yy_reduce_print], [static void],

-                  [[YYSTYPE *yyvsp], [yyvsp]],
+                   [[yytype_int16 *yyssp], [yyssp]],
+                   [[YYSTYPE *yyvsp], [yyvsp]],

     b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
     b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],

-                  ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
-                  b4_parse_param]))[
+                   ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
+                   b4_parse_param]))[

 {
 {

+  unsigned long int yylno = yyrline[yyrule];

   int yynrhs = yyr2[yyrule];
   int yyi;
   int yynrhs = yyr2[yyrule];
   int yyi;

-  unsigned long int yylno = yyrline[yyrule];

   YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
   YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",

-            yyrule - 1, yylno);
+             yyrule - 1, yylno);

   /* The symbols being reduced.  */
   for (yyi = 0; yyi < yynrhs; yyi++)
     {
       YYFPRINTF (stderr, "   $%d = ", yyi + 1);
   /* 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[);
+      yy_symbol_print (stderr,
+                       yystos[yyssp[yyi + 1 - yynrhs]],
+                       &]b4_rhs_value(yynrhs, yyi + 1)[
+                       ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
+                       b4_user_args[);

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


@@ -769,7 +785,7 @@ do {                                                                \
 # define YY_REDUCE_PRINT(Rule)         \
 do {                                   \
   if (yydebug)                         \
 # define YY_REDUCE_PRINT(Rule)         \
 do {                                   \
   if (yydebug)                         \

-    yy_reduce_print (yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
+    yy_reduce_print (yyssp, yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \

 } while (YYID (0))
 
 /* Nonzero means print parse trace.  It is left uninitialized so that
 } while (YYID (0))
 
 /* Nonzero means print parse trace.  It is left uninitialized so that


@@ -887,218 +903,164 @@ yytnamerr (char *yyres, const char *yystr)
 }
 # endif
 
 }
 # endif
 

-/* Copy into YYRESULT an error message about the unexpected token
-   YYCHAR while in state YYSTATE.  Return the number of bytes copied,
-   including the terminating null byte.  If YYRESULT is null, do not
-   copy anything; just return the number of bytes that would be
-   copied.  As a special case, return 0 if an ordinary "syntax error"
-   message will do.  Return YYSIZE_MAXIMUM if overflow occurs during
-   size calculation.  */
-static YYSIZE_T
-yysyntax_error (char *yyresult, int yystate, int yychar)
+/* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
+   about the unexpected token YYTOKEN while in state YYSTATE.
+
+   Return 0 if *YYMSG was successfully written.  Return 1 if an ordinary
+   "syntax error" message will suffice instead.  Return 2 if *YYMSG is
+   not large enough to hold the message.  In the last case, also set
+   *YYMSG_ALLOC to either (a) the required number of bytes or (b) zero
+   if the required number of bytes is too large to store.  */
+static int
+yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
+                int yystate, int yytoken)

 {
   int yyn = yypact[yystate];
 
   if (! (YYPACT_NINF < yyn && yyn <= YYLAST))
 {
   int yyn = yypact[yystate];
 
   if (! (YYPACT_NINF < yyn && yyn <= YYLAST))

-    return 0;
+    return 1;

   else
     {
   else
     {

-      int yytype = YYTRANSLATE (yychar);
-      YYSIZE_T yysize0 = yytnamerr (0, yytname[yytype]);
+      YYSIZE_T yysize0 = yytnamerr (0, yytname[yytoken]);

       YYSIZE_T yysize = yysize0;
       YYSIZE_T yysize1;
       YYSIZE_T yysize = yysize0;
       YYSIZE_T yysize1;

-      int yysize_overflow = 0;

       enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
       enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };

+      /* Internationalized format string. */
+      const char *yyformat = 0;
+      /* Arguments of yyformat. */

       char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
       char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];

-      int yyx;
-
-# if 0
-      /* This is so xgettext sees the translatable formats that are
-        constructed on the fly.  */
-      YY_("syntax error, unexpected %s");
-      YY_("syntax error, unexpected %s, expecting %s");
-      YY_("syntax error, unexpected %s, expecting %s or %s");
-      YY_("syntax error, unexpected %s, expecting %s or %s or %s");
-      YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s");
-# endif
-      char *yyfmt;
-      char const *yyf;
-      static char const yyunexpected[] = "syntax error, unexpected %s";
-      static char const yyexpecting[] = ", expecting %s";
-      static char const yyor[] = " or %s";
-      char yyformat[sizeof yyunexpected
-                   + sizeof yyexpecting - 1
-                   + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2)
-                      * (sizeof yyor - 1))];
-      char const *yyprefix = yyexpecting;

 
       /* Start YYX at -YYN if negative to avoid negative indexes in
 
       /* Start YYX at -YYN if negative to avoid negative indexes in

-        YYCHECK.  */
+        YYCHECK.  In other words, skip the first -YYN actions for this
+        state because they are default actions.  */

       int yyxbegin = yyn < 0 ? -yyn : 0;
 
       /* Stay within bounds of both yycheck and yytname.  */
       int yychecklim = YYLAST - yyn + 1;
       int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
       int yyxbegin = yyn < 0 ? -yyn : 0;
 
       /* Stay within bounds of both yycheck and yytname.  */
       int yychecklim = YYLAST - yyn + 1;
       int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;

-      int yycount = 1;
+      /* Number of reported tokens (one for the "unexpected", one per
+         "expected"). */
+      int yycount = 0;
+      int yyx;

 
 

-      yyarg[0] = yytname[yytype];
-      yyfmt = yystpcpy (yyformat, yyunexpected);
+      yyarg[yycount++] = yytname[yytoken];

 
       for (yyx = yyxbegin; yyx < yyxend; ++yyx)
 
       for (yyx = yyxbegin; yyx < yyxend; ++yyx)

-       if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
+       if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
+           && !yytable_value_is_error (yytable[yyx + yyn]))

          {
            if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
              {
                yycount = 1;
                yysize = yysize0;
          {
            if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
              {
                yycount = 1;
                yysize = yysize0;

-               yyformat[sizeof yyunexpected - 1] = '\0';

                break;
              }
            yyarg[yycount++] = yytname[yyx];
            yysize1 = yysize + yytnamerr (0, yytname[yyx]);
                break;
              }
            yyarg[yycount++] = yytname[yyx];
            yysize1 = yysize + yytnamerr (0, yytname[yyx]);

-           yysize_overflow |= (yysize1 < yysize);
+           if (! (yysize <= yysize1
+                  && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+             {
+               /* Overflow.  */
+               *yymsg_alloc = 0;
+               return 2;
+             }

            yysize = yysize1;
            yysize = yysize1;

-           yyfmt = yystpcpy (yyfmt, yyprefix);
-           yyprefix = yyor;

          }
 
          }
 

-      yyf = YY_(yyformat);
-      yysize1 = yysize + yystrlen (yyf);
-      yysize_overflow |= (yysize1 < yysize);
+      switch (yycount)
+        {
+#define YYCASE_(N, S)                           \
+          case N:                               \
+            yyformat = S;                       \
+          break
+          YYCASE_(1, YY_("syntax error, unexpected %s"));
+          YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
+          YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
+          YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
+          YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
+#undef YYCASE_
+        }
+
+      yysize1 = yysize + yystrlen (yyformat);
+      if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+        {
+          /* Overflow.  */
+          *yymsg_alloc = 0;
+          return 2;
+        }

       yysize = yysize1;
 
       yysize = yysize1;
 

-      if (yysize_overflow)
-       return YYSIZE_MAXIMUM;
+      if (*yymsg_alloc < yysize)
+        {
+          *yymsg_alloc = 2 * yysize;
+          if (! (yysize <= *yymsg_alloc
+                 && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
+            *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
+          return 2;
+        }

 
 

-      if (yyresult)
-       {
-         /* Avoid sprintf, as that infringes on the user's name space.
-            Don't have undefined behavior even if the translation
-            produced a string with the wrong number of "%s"s.  */
-         char *yyp = yyresult;
-         int yyi = 0;
-         while ((*yyp = *yyf) != '\0')
-           {
-             if (*yyp == '%' && yyf[1] == 's' && yyi < yycount)
-               {
-                 yyp += yytnamerr (yyp, yyarg[yyi++]);
-                 yyf += 2;
-               }
-             else
-               {
-                 yyp++;
-                 yyf++;
-               }
-           }
-       }
-      return yysize;
+      /* Avoid sprintf, as that infringes on the user's name space.
+         Don't have undefined behavior even if the translation
+         produced a string with the wrong number of "%s"s.  */
+      {
+        char *yyp = *yymsg;
+        int yyi = 0;
+        while ((*yyp = *yyformat) != '\0')
+          if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
+            {
+              yyp += yytnamerr (yyp, yyarg[yyi++]);
+              yyformat += 2;
+            }
+          else
+            {
+              yyp++;
+              yyformat++;
+            }
+      }
+      return 0;

     }
 }
 #endif /* YYERROR_VERBOSE */
 \f
 
     }
 }
 #endif /* YYERROR_VERBOSE */
 \f
 

-]b4_yydestruct_generate([b4_c_function_def])[
+]b4_yydestruct_generate([b4_c_function_def])b4_push_if([], [[

 
 

-]b4_push_if([],
-[[/* Prevent warnings from -Wmissing-prototypes.  */
+
+/* Prevent warnings from -Wmissing-prototypes.  */

 #ifdef YYPARSE_PARAM
 ]b4_c_function_decl([yyparse], [int],
 #ifdef YYPARSE_PARAM
 ]b4_c_function_decl([yyparse], [int],

-   [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
+                    [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[

 #else /* ! YYPARSE_PARAM */
 ]b4_c_function_decl([yyparse], [int], b4_parse_param)[
 #else /* ! YYPARSE_PARAM */
 ]b4_c_function_decl([yyparse], [int], b4_parse_param)[

-#endif /* ! YYPARSE_PARAM */]])
-
-m4_divert_push([KILL])# ======================== M4 code.
-# b4_declare_scanner_communication_variables
-# ------------------------------------------
-# Declare the variables that are global, or local to YYPARSE if
-# pure-parser.
-m4_define([b4_declare_scanner_communication_variables],
-[[/* The lookahead symbol.  */
-int yychar;
-
-/* The semantic value of the lookahead symbol.  */
-YYSTYPE yylval;
-]b4_locations_if([[
-/* Location data for the lookahead symbol.  */
-YYLTYPE yylloc;
-]])b4_pure_if([], [[
-/* Number of syntax errors so far.  */
-int yynerrs;
-]])])
-
-# b4_declare_parser_state_variables
-# ---------------------------------
-# Declare all the variables that are needed to maintain the parser state
-# between calls to yypush_parse.
-m4_define([b4_declare_parser_state_variables],
-[b4_pure_if([[    /* Number of syntax errors so far.  */
-    int yynerrs;
-]])[
-    int yystate;
-    /* Number of tokens to shift before error messages enabled.  */
-    int yyerrstatus;
+#endif /* ! YYPARSE_PARAM */]])b4_pure_if([], [

 
 

-    /* The stacks and their tools:
-       `yyss': related to states.
-       `yyvs': related to semantic values.]b4_locations_if([[
-       `yyls': related to locations.]])[
+b4_declare_scanner_communication_variables])[]b4_push_if([[

 
 

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

 
 

-    /* The state stack.  */
-    yytype_int16 yyssa[YYINITDEPTH];
-    yytype_int16 *yyss;
-    yytype_int16 *yyssp;
-
-    /* The semantic value stack.  */
-    YYSTYPE yyvsa[YYINITDEPTH];
-    YYSTYPE *yyvs;
-    YYSTYPE *yyvsp;
-]b4_locations_if([[
-    /* The location stack.  */
-    YYLTYPE yylsa[YYINITDEPTH];
-    YYLTYPE *yyls;
-    YYLTYPE *yylsp;
-
-    /* The locations where the error started and ended.  */
-    YYLTYPE yyerror_range[2];
-]])[
-    YYSIZE_T yystacksize;
-]])
-
-m4_divert_pop([KILL])dnl# ====================== End of M4 code.
-
-b4_pure_if([], [b4_declare_scanner_communication_variables])
-
-b4_push_if(
-[[struct yypstate
-  {
-    ]b4_declare_parser_state_variables[
+struct yypstate
+  {]b4_declare_parser_state_variables[

     /* Used to determine if this is the first time this instance has
        been used.  */
     int yynew;
     /* Used to determine if this is the first time this instance has
        been used.  */
     int yynew;

-  };
+  };]b4_pure_if([], [[
+
+static char yypstate_allocated = 0;]])b4_pull_if([

 
 

-]b4_pull_if([b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
+b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[

 {
   return yypull_parse (0]m4_ifset([b4_parse_param],
                                   [[, ]b4_c_args(b4_parse_param)])[);
 {
   return yypull_parse (0]m4_ifset([b4_parse_param],
                                   [[, ]b4_c_args(b4_parse_param)])[);

-}]b4_pure_if([], [[
-
-static char yypstate_allocated = 0;]])[
+}

 
 ]b4_c_function_def([[yypull_parse]], [[int]],
   [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
   b4_parse_param]))[
 {
   int yystatus;
 
 ]b4_c_function_def([[yypull_parse]], [[int]],
   [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
   b4_parse_param]))[
 {
   int yystatus;

-  yypstate *yyps_local;
-]b4_pure_if([[  int yychar;
-  YYSTYPE yylval;
-]b4_locations_if([[  YYLTYPE yylloc;
-]])])[
+  yypstate *yyps_local;]b4_pure_if([[
+  int yychar;
+  YYSTYPE yylval;]b4_locations_if([[
+  YYLTYPE yylloc;]])])[

   if (yyps == 0)
     {
       yyps_local = yypstate_new ();
   if (yyps == 0)
     {
       yyps_local = yypstate_new ();


@@ -1120,17 +1082,14 @@ static char yypstate_allocated = 0;]])[
   if (yyps == 0)
     yypstate_delete (yyps_local);
   return yystatus;
   if (yyps == 0)
     yypstate_delete (yyps_local);
   return yystatus;

-}
-]])[
+}]])[
+

 /* Initialize the parser data structure.  */
 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
 {
   yypstate *yyps;]b4_pure_if([], [[
   if (yypstate_allocated)
 /* Initialize the parser data structure.  */
 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
 {
   yypstate *yyps;]b4_pure_if([], [[
   if (yypstate_allocated)

-    {
-      yyerror (]b4_yyerror_args[YY_("cannot allocate multiple impure push-parser instances"));
-      return 0;
-    }]])[
+    return 0;]])[

   yyps = (yypstate *) malloc (sizeof *yyps);
   if (!yyps)
     return 0;
   yyps = (yypstate *) malloc (sizeof *yyps);
   if (!yyps)
     return 0;


@@ -1151,53 +1110,62 @@ static char yypstate_allocated = 0;]])[
   free (yyps);]b4_pure_if([], [[
   yypstate_allocated = 0;]])[
 }
   free (yyps);]b4_pure_if([], [[
   yypstate_allocated = 0;]])[
 }

-
-]b4_pure_if([[#define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs
-]])[#define yystate yyps->yystate
+]b4_pure_if([[
+#define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[
+#define yystate yyps->yystate

 #define yyerrstatus yyps->yyerrstatus
 #define yyssa yyps->yyssa
 #define yyss yyps->yyss
 #define yyssp yyps->yyssp
 #define yyvsa yyps->yyvsa
 #define yyvs yyps->yyvs
 #define yyerrstatus yyps->yyerrstatus
 #define yyssa yyps->yyssa
 #define yyss yyps->yyss
 #define yyssp yyps->yyssp
 #define yyvsa yyps->yyvsa
 #define yyvs yyps->yyvs

-#define yyvsp yyps->yyvsp
-]b4_locations_if([[#define yylsa yyps->yylsa
+#define yyvsp yyps->yyvsp]b4_locations_if([[
+#define yylsa yyps->yylsa

 #define yyls yyps->yyls
 #define yylsp yyps->yylsp
 #define yyls yyps->yyls
 #define yylsp yyps->yylsp

-#define yyerror_range yyps->yyerror_range
-]])[#define yystacksize yyps->yystacksize
-]])[
-/*-------------------------.
-| yyparse or yypush_parse.  |
-`-------------------------*/
-]b4_push_if([
-b4_c_function_def([[yypush_parse]], [[int]],
+#define yyerror_range yyps->yyerror_range]])[
+#define yystacksize yyps->yystacksize
+
+
+/*---------------.
+| yypush_parse.  |
+`---------------*/
+
+]b4_c_function_def([[yypush_parse]], [[int]],

   [[[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], [,
   [[[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], [,

-  b4_parse_param]))], [
+  b4_parse_param]))], [[
+
+
+/*----------.
+| yyparse.  |
+`----------*/
+

 #ifdef YYPARSE_PARAM
 #ifdef YYPARSE_PARAM

-b4_c_function_def([yyparse], [int], [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])
+]b4_c_function_def([yyparse], [int],
+                   [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[

 #else /* ! YYPARSE_PARAM */
 #else /* ! YYPARSE_PARAM */

-b4_c_function_def([yyparse], [int], b4_parse_param)
-#endif])[
-{
-]b4_pure_if([b4_declare_scanner_communication_variables])
-b4_push_if([b4_pure_if([], [[  int yypushed_char = yychar;
-  YYSTYPE yypushed_val = yylval;
-  ]b4_locations_if([[YYLTYPE yypushed_loc = yylloc;
-]])])],
-  [b4_declare_parser_state_variables])[
+]b4_c_function_def([yyparse], [int], b4_parse_param)[
+#endif]])[
+{]b4_pure_if([b4_declare_scanner_communication_variables
+])b4_push_if([b4_pure_if([], [[
+  int yypushed_char = yychar;
+  YYSTYPE yypushed_val = yylval;]b4_locations_if([[
+  YYLTYPE yypushed_loc = yylloc;]])
+])],
+  [b4_declare_parser_state_variables
+])[

   int yyn;
   int yyresult;
   /* Lookahead token as an internal (translated) token number.  */
   int yytoken;
   /* The variables used to return semantic value and location from the
      action routines.  */
   int yyn;
   int yyresult;
   /* Lookahead token as an internal (translated) token number.  */
   int yytoken;
   /* The variables used to return semantic value and location from the
      action routines.  */

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

 #if YYERROR_VERBOSE
   /* Buffer for error messages, and its allocated size.  */
   char yymsgbuf[128];
 #if YYERROR_VERBOSE
   /* Buffer for error messages, and its allocated size.  */
   char yymsgbuf[128];


@@ -1209,19 +1177,18 @@ b4_push_if([b4_pure_if([], [[  int yypushed_char = yychar;
 
   /* The number of symbols on the RHS of the reduced rule.
      Keep to zero when no symbol should be popped.  */
 
   /* The number of symbols on the RHS of the reduced rule.
      Keep to zero when no symbol should be popped.  */

-  int yylen = 0;
-]b4_push_if([[
+  int yylen = 0;]b4_push_if([[
+

   if (!yyps->yynew)
     {
       yyn = yypact[yystate];
       goto yyread_pushed_token;
   if (!yyps->yynew)
     {
       yyn = yypact[yystate];
       goto yyread_pushed_token;

-    }
-]])[
+    }]])[
+

   yytoken = 0;
   yyss = yyssa;
   yytoken = 0;
   yyss = yyssa;

-  yyvs = yyvsa;
-]b4_locations_if([[  yyls = yylsa;
-]])[
+  yyvs = yyvsa;]b4_locations_if([[
+  yyls = yylsa;]])[

   yystacksize = YYINITDEPTH;
 
   YYDPRINTF ((stderr, "Starting parse\n"));
   yystacksize = YYINITDEPTH;
 
   YYDPRINTF ((stderr, "Starting parse\n"));


@@ -1239,7 +1206,7 @@ b4_push_if([b4_pure_if([], [[  int yypushed_char = yychar;
   yyvsp = yyvs;]b4_locations_if([[
   yylsp = yyls;
 
   yyvsp = yyvs;]b4_locations_if([[
   yylsp = yyls;
 

-#if YYLTYPE_IS_TRIVIAL
+#if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_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[;
   /* 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[;


@@ -1351,40 +1318,36 @@ yybackup:
 
   /* First try to decide what to do without reference to lookahead token.  */
   yyn = yypact[yystate];
 
   /* First try to decide what to do without reference to lookahead token.  */
   yyn = yypact[yystate];

-  if (yyn == YYPACT_NINF)
+  if (yypact_value_is_default (yyn))

     goto yydefault;
 
   /* Not known => get a lookahead token if don't already have one.  */
 
   /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol.  */
   if (yychar == YYEMPTY)
     goto yydefault;
 
   /* Not known => get a lookahead token if don't already have one.  */
 
   /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol.  */
   if (yychar == YYEMPTY)

-    {
-]b4_push_if([[      if (!yyps->yynew)
-        {
-]b4_use_push_for_pull_if([],
-[[          YYDPRINTF ((stderr, "Return for a new token:\n"));
-]])[          yyresult = YYPUSH_MORE;
+    {]b4_push_if([[
+      if (!yyps->yynew)
+        {]b4_use_push_for_pull_if([], [[
+          YYDPRINTF ((stderr, "Return for a new token:\n"));]])[
+          yyresult = YYPUSH_MORE;

           goto yypushreturn;
         }
           goto yypushreturn;
         }

-      yyps->yynew = 0;
-]b4_pure_if([], [[
+      yyps->yynew = 0;]b4_pure_if([], [[

       /* Restoring the pushed token is only necessary for the first
          yypush_parse invocation since subsequent invocations don't overwrite
          it before jumping to yyread_pushed_token.  */
       yychar = yypushed_char;
       /* Restoring the pushed token is only necessary for the first
          yypush_parse invocation since subsequent invocations don't overwrite
          it before jumping to yyread_pushed_token.  */
       yychar = yypushed_char;

-      yylval = yypushed_val;
-      ]b4_locations_if([[yylloc = yypushed_loc;
-]])])[
-yyread_pushed_token:
-]])[      YYDPRINTF ((stderr, "Reading a token: "));
-]b4_push_if([b4_pure_if([[      yychar = yypushed_char;
+      yylval = yypushed_val;]b4_locations_if([[
+      yylloc = yypushed_loc;]])])[
+yyread_pushed_token:]])[
+      YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
+      yychar = yypushed_char;

       if (yypushed_val)
       if (yypushed_val)

-        yylval = *yypushed_val;
-]b4_locations_if([[      if (yypushed_loc)
-        yylloc = *yypushed_loc;
-]])])],
-[[      yychar = YYLEX;
-]])[    }
+        yylval = *yypushed_val;]b4_locations_if([[
+      if (yypushed_loc)
+        yylloc = *yypushed_loc;]])])], [[
+      yychar = YYLEX;]])[
+    }

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


@@ -1405,7 +1368,7 @@ yyread_pushed_token:
   yyn = yytable[yyn];
   if (yyn <= 0)
     {
   yyn = yytable[yyn];
   if (yyn <= 0)
     {

-      if (yyn == 0 || yyn == YYTABLE_NINF)
+      if (yytable_value_is_error (yyn))

        goto yyerrlab;
       yyn = -yyn;
       goto yyreduce;
        goto yyerrlab;
       yyn = -yyn;
       goto yyreduce;


@@ -1464,6 +1427,17 @@ yyreduce:
       ]b4_user_actions[
       default: break;
     }
       ]b4_user_actions[
       default: break;
     }

+  /* User semantic actions sometimes alter yychar, and that requires
+     that yytoken be updated with the new translation.  We take the
+     approach of translating immediately before every use of yytoken.
+     One alternative is translating here after every semantic action,
+     but that translation would be missed if the semantic action invokes
+     YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
+     if it invokes YYBACKUP.  In the case of YYABORT or YYACCEPT, an
+     incorrect destructor might then be invoked immediately.  In the
+     case of YYERROR or YYBACKUP, subsequent parser actions might lead
+     to an incorrect destructor call or verbose syntax error message
+     before the lookahead is translated.  */

   YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
 
   YYPOPSTACK (yylen);
   YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
 
   YYPOPSTACK (yylen);


@@ -1492,6 +1466,10 @@ yyreduce:
 | yyerrlab -- here on detecting error |
 `------------------------------------*/
 yyerrlab:
 | yyerrlab -- here on detecting error |
 `------------------------------------*/
 yyerrlab:

+  /* Make sure we have latest lookahead translation.  See comments at
+     user semantic actions for why this is necessary.  */
+  yytoken = YYTRANSLATE (yychar);
+

   /* If not already recovering from an error, report this error.  */
   if (!yyerrstatus)
     {
   /* If not already recovering from an error, report this error.  */
   if (!yyerrstatus)
     {


@@ -1499,41 +1477,32 @@ yyerrlab:
 #if ! YYERROR_VERBOSE
       yyerror (]b4_yyerror_args[YY_("syntax error"));
 #else
 #if ! YYERROR_VERBOSE
       yyerror (]b4_yyerror_args[YY_("syntax error"));
 #else

-      {
-       YYSIZE_T yysize = yysyntax_error (0, yystate, yychar);
-       if (yymsg_alloc < yysize && yymsg_alloc < YYSTACK_ALLOC_MAXIMUM)
-         {
-           YYSIZE_T yyalloc = 2 * yysize;
-           if (! (yysize <= yyalloc && yyalloc <= YYSTACK_ALLOC_MAXIMUM))
-             yyalloc = YYSTACK_ALLOC_MAXIMUM;
-           if (yymsg != yymsgbuf)
-             YYSTACK_FREE (yymsg);
-           yymsg = (char *) YYSTACK_ALLOC (yyalloc);
-           if (yymsg)
-             yymsg_alloc = yyalloc;
-           else
-             {
-               yymsg = yymsgbuf;
-               yymsg_alloc = sizeof yymsgbuf;
-             }
-         }
-
-       if (0 < yysize && yysize <= yymsg_alloc)
-         {
-           (void) yysyntax_error (yymsg, yystate, yychar);
-           yyerror (]b4_yyerror_args[yymsg);
-         }
-       else
-         {
-           yyerror (]b4_yyerror_args[YY_("syntax error"));
-           if (yysize != 0)
-             goto yyexhaustedlab;
-         }
-      }
+      while (1)
+        {
+          int yysyntax_error_status =
+            yysyntax_error (&yymsg_alloc, &yymsg, yystate, yytoken);
+          if (yysyntax_error_status == 2 && 0 < yymsg_alloc)
+            {
+              if (yymsg != yymsgbuf)
+                YYSTACK_FREE (yymsg);
+              yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
+              if (yymsg)
+                continue;
+              yymsg = yymsgbuf;
+              yymsg_alloc = sizeof yymsgbuf;
+            }
+          if (yysyntax_error_status == 0)
+            yyerror (]b4_yyerror_args[yymsg);
+          else
+            yyerror (]b4_yyerror_args[YY_("syntax error"));
+          if (yysyntax_error_status == 2)
+            goto yyexhaustedlab;
+          break;
+        }

 #endif
     }
 
 #endif
     }
 

-]b4_locations_if([[  yyerror_range[0] = yylloc;]])[
+]b4_locations_if([[  yyerror_range[1] = yylloc;]])[

 
   if (yyerrstatus == 3)
     {
 
   if (yyerrstatus == 3)
     {


@@ -1570,7 +1539,7 @@ yyerrorlab:
   if (/*CONSTCOND*/ 0)
      goto yyerrorlab;
 
   if (/*CONSTCOND*/ 0)
      goto yyerrorlab;
 

-]b4_locations_if([[  yyerror_range[0] = yylsp[1-yylen];
+]b4_locations_if([[  yyerror_range[1] = yylsp[1-yylen];

 ]])[  /* Do not reclaim the symbols of the rule which action triggered
      this YYERROR.  */
   YYPOPSTACK (yylen);
 ]])[  /* Do not reclaim the symbols of the rule which action triggered
      this YYERROR.  */
   YYPOPSTACK (yylen);


@@ -1589,7 +1558,7 @@ yyerrlab1:
   for (;;)
     {
       yyn = yypact[yystate];
   for (;;)
     {
       yyn = yypact[yystate];

-      if (yyn != YYPACT_NINF)
+      if (!yypact_value_is_default (yyn))

        {
          yyn += YYTERROR;
          if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
        {
          yyn += YYTERROR;
          if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)


@@ -1604,7 +1573,7 @@ yyerrlab1:
       if (yyssp == yyss)
        YYABORT;
 
       if (yyssp == yyss)
        YYABORT;
 

-]b4_locations_if([[      yyerror_range[0] = *yylsp;]])[
+]b4_locations_if([[      yyerror_range[1] = *yylsp;]])[

       yydestruct ("Error: popping",
                  yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
       YYPOPSTACK (1);
       yydestruct ("Error: popping",
                  yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
       YYPOPSTACK (1);


@@ -1614,10 +1583,10 @@ yyerrlab1:
 
   *++yyvsp = yylval;
 ]b4_locations_if([[
 
   *++yyvsp = yylval;
 ]b4_locations_if([[

-  yyerror_range[1] = yylloc;
+  yyerror_range[2] = yylloc;

   /* Using YYLLOC is tempting, but would change the location of
      the lookahead.  YYLOC is available though.  */
   /* Using YYLLOC is tempting, but would change the location of
      the lookahead.  YYLOC is available though.  */

-  YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2);
+  YYLLOC_DEFAULT (yyloc, yyerror_range, 2);

   *++yylsp = yyloc;]])[
 
   /* Shift the error token.  */
   *++yylsp = yyloc;]])[
 
   /* Shift the error token.  */


@@ -1653,8 +1622,13 @@ yyexhaustedlab:
 
 yyreturn:
   if (yychar != YYEMPTY)
 
 yyreturn:
   if (yychar != YYEMPTY)

-     yydestruct ("Cleanup: discarding lookahead",
-                yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
+    {
+      /* Make sure we have latest lookahead translation.  See comments at
+         user semantic actions for why this is necessary.  */
+      yytoken = YYTRANSLATE (yychar);
+      yydestruct ("Cleanup: discarding lookahead",
+                  yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
+    }

   /* Do not reclaim the symbols of the rule which action triggered
      this YYABORT or YYACCEPT.  */
   YYPOPSTACK (yylen);
   /* Do not reclaim the symbols of the rule which action triggered
      this YYABORT or YYACCEPT.  */
   YYPOPSTACK (yylen);


@@ -1668,11 +1642,11 @@ yyreturn:
 #ifndef yyoverflow
   if (yyss != yyssa)
     YYSTACK_FREE (yyss);
 #ifndef yyoverflow
   if (yyss != yyssa)
     YYSTACK_FREE (yyss);

-#endif
-]b4_push_if([[  yyps->yynew = 1;
+#endif]b4_push_if([[
+  yyps->yynew = 1;

 
 

-yypushreturn:
-]])[#if YYERROR_VERBOSE
+yypushreturn:]])[
+#if YYERROR_VERBOSE

   if (yymsg != yymsgbuf)
     YYSTACK_FREE (yymsg);
 #endif
   if (yymsg != yymsgbuf)
     YYSTACK_FREE (yymsg);
 #endif


@@ -1680,12 +1654,10 @@ yypushreturn:
   return YYID (yyresult);
 }
 
   return YYID (yyresult);
 }
 

-
-]b4_epilogue
+]b4_epilogue[]dnl

 b4_defines_if(
 b4_defines_if(

-[@output(b4_spec_defines_file@)
-b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],dnl '
-  [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])
+[@output(b4_spec_defines_file@)@
+b4_copyright([Interface for Bison's Yacc-like parsers in C])dnl

 
 b4_percent_code_get([[requires]])[]dnl
 
 
 b4_percent_code_get([[requires]])[]dnl
 


@@ -1748,3 +1720,4 @@ b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
 b4_percent_code_get([[provides]])[]dnl
 ])dnl b4_defines_if
 m4_divert_pop(0)
 b4_percent_code_get([[provides]])[]dnl
 ])dnl b4_defines_if
 m4_divert_pop(0)

+m4_popdef([b4_copyright_years])