Do not let the scan-skel token buffer grow unboundedly in the usual case.

[bison.git] / data / yacc.c

diff --git a/data/yacc.c b/data/yacc.c
index b0517a051033310366e8a8bb2e07d3d8206bee16..dc2d58d6928dd18ca591e5354e93c06f9f86f469 100644 (file)
--- a/data/yacc.c
+++ b/data/yacc.c
@@ -1,8 +1,7 @@
 m4_divert(-1)                                                       -*- C -*-
 m4_divert(-1)                                                       -*- C -*-

-m4_include([c.m4])

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

-# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002
+# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003

 # Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify


@@ -30,9 +29,6 @@ m4_include([c.m4])
 m4_define_default([b4_stack_depth_max], [10000])
 m4_define_default([b4_stack_depth_init],  [200])
 
 m4_define_default([b4_stack_depth_max], [10000])
 m4_define_default([b4_stack_depth_init],  [200])
 

-# Location type.
-m4_define_default([b4_location_type], [yyltype])
-

 
 ## ------------------------ ##
 ## Pure/impure interfaces.  ##
 
 ## ------------------------ ##
 ## Pure/impure interfaces.  ##


@@ -58,7 +54,7 @@ m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
 
 # b4_lex_param
 # ------------
 
 # b4_lex_param
 # ------------

-# Accumule in b4_lex_param all the yylex arguments.
+# 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_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


@@ -138,7 +134,7 @@ m4_changecom()
 m4_divert(0)dnl
 @output @output_parser_name@
 b4_copyright([Skeleton parser for Yacc-like parsing with Bison],
 m4_divert(0)dnl
 @output @output_parser_name@
 b4_copyright([Skeleton parser for Yacc-like parsing with Bison],

-             [1984, 1989, 1990, 2000, 2001, 2002])[
+             [1984, 1989, 1990, 2000, 2001, 2002, 2003])[

 
 /* As a special exception, when this file is copied by Bison into a
    Bison output file, you may use that output file without restriction.
 
 /* As a special exception, when this file is copied by Bison into a
    Bison output file, you may use that output file without restriction.


@@ -186,34 +182,37 @@ b4_location_if([#define yylloc b4_prefix[]lloc])])[
 # define YYERROR_VERBOSE ]b4_error_verbose[
 #endif
 
 # define YYERROR_VERBOSE ]b4_error_verbose[
 #endif
 

-#ifndef YYSTYPE
+#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)

 ]m4_ifdef([b4_stype],
 [b4_syncline([b4_stype_line], [b4_filename])
 ]m4_ifdef([b4_stype],
 [b4_syncline([b4_stype_line], [b4_filename])

-typedef union b4_stype yystype;
-/* Line __line__ of __file__.  */
+typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])b4_stype YYSTYPE;
+/* Line __line__ of yacc.c.  */

 b4_syncline([@oline@], [@ofile@])],
 b4_syncline([@oline@], [@ofile@])],

-[typedef int yystype;])[
-# define YYSTYPE yystype
+[typedef int YYSTYPE;])[
+# define yystype YYSTYPE /* obsolescent; will be withdrawn */
+# define YYSTYPE_IS_DECLARED 1

 # define YYSTYPE_IS_TRIVIAL 1
 #endif
 
 # define YYSTYPE_IS_TRIVIAL 1
 #endif
 

-#ifndef YYLTYPE
-typedef struct yyltype
+]b4_location_if([#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED)
+typedef struct YYLTYPE

 {
   int first_line;
   int first_column;
   int last_line;
   int last_column;
 {
   int first_line;
   int first_column;
   int last_line;
   int last_column;

-} yyltype;
-# define YYLTYPE ]b4_location_type[
+} YYLTYPE;
+# define yyltype YYLTYPE /* obsolescent; will be withdrawn */
+# define YYLTYPE_IS_DECLARED 1

 # define YYLTYPE_IS_TRIVIAL 1
 #endif
 # define YYLTYPE_IS_TRIVIAL 1
 #endif

+])[

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

-]b4_post_prologue[
+]b4_post_prologue

 
 

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

 
 #if ! defined (yyoverflow) || YYERROR_VERBOSE
 
 
 #if ! defined (yyoverflow) || YYERROR_VERBOSE
 


@@ -249,7 +248,7 @@ typedef struct yyltype
 
 #if (! defined (yyoverflow) \
      && (! defined (__cplusplus) \
 
 #if (! defined (yyoverflow) \
      && (! defined (__cplusplus) \

-        || (YYLTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
+        || (]b4_location_if([YYLTYPE_IS_TRIVIAL && ])[YYSTYPE_IS_TRIVIAL)))

 
 /* A type that is properly aligned for any stack member.  */
 union yyalloc
 
 /* A type that is properly aligned for any stack member.  */
 union yyalloc


@@ -261,17 +260,17 @@ union yyalloc
 [};
 
 /* The size of the maximum gap between one aligned stack and the next.  */
 [};
 
 /* The size of the maximum gap between one aligned stack and the next.  */

-# define YYSTACK_GAP_MAX (sizeof (union yyalloc) - 1)
+# define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)

 
 /* The size of an array large to enough to hold all stacks, each with
    N elements.  */
 ]b4_location_if(
 [# define YYSTACK_BYTES(N) \
      ((N) * (sizeof (short) + sizeof (YYSTYPE) + sizeof (YYLTYPE))     \
 
 /* The size of an array large to enough to hold all stacks, each with
    N elements.  */
 ]b4_location_if(
 [# define YYSTACK_BYTES(N) \
      ((N) * (sizeof (short) + sizeof (YYSTYPE) + sizeof (YYLTYPE))     \

-      + 2 * YYSTACK_GAP_MAX)],
+      + 2 * YYSTACK_GAP_MAXIMUM)],

 [# define YYSTACK_BYTES(N) \
      ((N) * (sizeof (short) + sizeof (YYSTYPE))                                \
 [# define YYSTACK_BYTES(N) \
      ((N) * (sizeof (short) + sizeof (YYSTYPE))                                \

-      + YYSTACK_GAP_MAX)])[
+      + YYSTACK_GAP_MAXIMUM)])[

 
 /* Copy COUNT objects from FROM to TO.  The source and destination do
    not overlap.  */
 
 /* Copy COUNT objects from FROM to TO.  The source and destination do
    not overlap.  */


@@ -302,7 +301,7 @@ union yyalloc
        YYSIZE_T yynewbytes;                                            \
        YYCOPY (&yyptr->Stack, Stack, yysize);                          \
        Stack = &yyptr->Stack;                                          \
        YYSIZE_T yynewbytes;                                            \
        YYCOPY (&yyptr->Stack, Stack, yysize);                          \
        Stack = &yyptr->Stack;                                          \

-       yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAX;   \
+       yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \

        yyptr += yynewbytes / sizeof (*yyptr);                          \
       }                                                                        \
     while (0)
        yyptr += yynewbytes / sizeof (*yyptr);                          \
       }                                                                        \
     while (0)


@@ -334,114 +333,113 @@ union yyalloc
 #define YYMAXUTOK   ]b4_user_token_number_max[
 
 #define YYTRANSLATE(YYX)                                               \
 #define YYMAXUTOK   ]b4_user_token_number_max[
 
 #define YYTRANSLATE(YYX)                                               \

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

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

-  ]b4_translate
+  ]b4_translate[

 };
 
 #if YYDEBUG
 };
 
 #if YYDEBUG

-/* YYPRHS[[YYN]] -- Index of the first RHS symbol of rule number YYN in
+/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in

    YYRHS.  */
    YYRHS.  */

-static const b4_int_type_for([b4_prhs]) yyprhs[[]] =
+static const ]b4_int_type_for([b4_prhs])[ yyprhs[] =

 {
 {

-  b4_prhs
+  ]b4_prhs[

 };
 
 /* YYRHS -- A `-1'-separated list of the rules' RHS. */
 };
 
 /* YYRHS -- A `-1'-separated list of the rules' RHS. */

-static const b4_int_type_for([b4_rhs]) yyrhs[[]] =
+static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =

 {
 {

-  b4_rhs
+  ]b4_rhs[

 };
 
 };
 

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

 {
 {

-  b4_rline
+  ]b4_rline[

 };
 #endif
 
 #if YYDEBUG || YYERROR_VERBOSE
 };
 #endif
 
 #if YYDEBUG || YYERROR_VERBOSE

-/* YYTNME[[SYMBOL-NUM]] -- String name of the symbol SYMBOL-NUM.
+/* YYTNME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.

    First, the terminals, then, starting at YYNTOKENS, nonterminals. */
    First, the terminals, then, starting at YYNTOKENS, nonterminals. */

-static const char *const yytname[[]] =
+static const char *const yytname[] =

 {
 {

-  b4_tname
+  ]b4_tname[

 };
 #endif
 
 # ifdef YYPRINT
 };
 #endif
 
 # ifdef YYPRINT

-/* YYTOKNUM[[YYLEX-NUM]] -- Internal token number corresponding to
+/* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to

    token YYLEX-NUM.  */
    token YYLEX-NUM.  */

-static const b4_int_type_for([b4_toknum]) yytoknum[[]] =
+static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =

 {
 {

-  b4_toknum
+  ]b4_toknum[

 };
 # endif
 
 };
 # endif
 

-/* YYR1[[YYN]] -- Symbol number of symbol that rule YYN derives.  */
-static const b4_int_type_for([b4_r1]) yyr1[[]] =
+/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
+static const ]b4_int_type_for([b4_r1])[ yyr1[] =

 {
 {

-  b4_r1
+  ]b4_r1[

 };
 
 };
 

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

 {
 {

-  b4_r2
+  ]b4_r2[

 };
 
 };
 

-/* YYDEFACT[[STATE-NAME]] -- Default rule to reduce with in state
+/* 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.  */
    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[[]] =
+static const ]b4_int_type_for([b4_defact])[ yydefact[] =

 {
 {

-  b4_defact
+  ]b4_defact[

 };
 
 };
 

-/* YYDEFGOTO[[NTERM-NUM]]. */
-static const b4_int_type_for([b4_defgoto]) yydefgoto[[]] =
+/* YYDEFGOTO[NTERM-NUM]. */
+static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =

 {
 {

-  b4_defgoto
+  ]b4_defgoto[

 };
 
 };
 

-/* YYPACT[[STATE-NUM]] -- Index in YYTABLE of the portion describing
+/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing

    STATE-NUM.  */
    STATE-NUM.  */

-#define YYPACT_NINF b4_pact_ninf
-static const b4_int_type_for([b4_pact]) yypact[[]] =
+#define YYPACT_NINF ]b4_pact_ninf[
+static const ]b4_int_type_for([b4_pact])[ yypact[] =

 {
 {

-  b4_pact
+  ]b4_pact[

 };
 
 };
 

-/* YYPGOTO[[NTERM-NUM]].  */
-static const b4_int_type_for([b4_pgoto]) yypgoto[[]] =
+/* YYPGOTO[NTERM-NUM].  */
+static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] =

 {
 {

-  b4_pgoto
+  ]b4_pgoto[

 };
 
 };
 

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

-   If YYTABLE_NINF, parse error.  */
-#define YYTABLE_NINF b4_table_ninf
-static const b4_int_type_for([b4_table]) yytable[[]] =
+   If YYTABLE_NINF, syntax error.  */
+#define YYTABLE_NINF ]b4_table_ninf[
+static const ]b4_int_type_for([b4_table])[ yytable[] =

 {
 {

-  b4_table
+  ]b4_table[

 };
 
 };
 

-static const b4_int_type_for([b4_check]) yycheck[[]] =
+static const ]b4_int_type_for([b4_check])[ yycheck[] =

 {
 {

-  b4_check
+  ]b4_check[

 };
 
 };
 

-/* YYSTOS[[STATE-NUM]] -- The (internal number of the) accessing
+/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing

    symbol of state STATE-NUM.  */
    symbol of state STATE-NUM.  */

-static const b4_int_type_for([b4_stos]) yystos[[]] =
+static const ]b4_int_type_for([b4_stos])[ yystos[] =

 {
 {

-  b4_stos[
+  ]b4_stos[

 };
 
 #if ! defined (YYSIZE_T) && defined (__SIZE_TYPE__)
 };
 
 #if ! defined (YYSIZE_T) && defined (__SIZE_TYPE__)


@@ -461,8 +459,8 @@ static const b4_int_type_for([b4_stos]) yystos[[]] =
 #endif
 
 #define yyerrok                (yyerrstatus = 0)
 #endif
 
 #define yyerrok                (yyerrstatus = 0)

-#define yyclearin      (yytoken = YYEMPTY)
-#define YYEMPTY                -2
+#define yyclearin      (yychar = YYEMPTY)
+#define YYEMPTY                (-2)

 #define YYEOF          0
 
 #define YYACCEPT       goto yyacceptlab
 #define YYEOF          0
 
 #define YYACCEPT       goto yyacceptlab


@@ -479,7 +477,7 @@ static const b4_int_type_for([b4_stos]) yystos[[]] =
 
 #define YYBACKUP(Token, Value)                                 \
 do                                                             \
 
 #define YYBACKUP(Token, Value)                                 \
 do                                                             \

-  if (yytoken == YYEMPTY && yylen == 1)                                \
+  if (yychar == YYEMPTY && yylen == 1)                         \

     {                                                          \
       yychar = (Token);                                                \
       yylval = (Value);                                                \
     {                                                          \
       yychar = (Token);                                                \
       yylval = (Value);                                                \


@@ -529,11 +527,13 @@ do {                                              \
   if (yydebug)                                 \
     YYFPRINTF Args;                            \
 } while (0)
   if (yydebug)                                 \
     YYFPRINTF Args;                            \
 } while (0)

+

 # define YYDSYMPRINT(Args)                     \
 do {                                           \
   if (yydebug)                                 \
     yysymprint Args;                           \
 } while (0)
 # define YYDSYMPRINT(Args)                     \
 do {                                           \
   if (yydebug)                                 \
     yysymprint Args;                           \
 } while (0)

+

 # define YYDSYMPRINTF(Title, Token, Value, Location)           \
 do {                                                           \
   if (yydebug)                                                 \
 # define YYDSYMPRINTF(Title, Token, Value, Location)           \
 do {                                                           \
   if (yydebug)                                                 \


@@ -545,6 +545,51 @@ do {                                                               \
     }                                                          \
 } while (0)
 
     }                                                          \
 } while (0)
 

+/*------------------------------------------------------------------.
+| yy_stack_print -- Print the state stack from its BOTTOM up to its |
+| TOP (cinluded).                                                   |
+`------------------------------------------------------------------*/
+
+]b4_c_function_def([yy_stack_print], [static void],
+                   [[short *bottom], [bottom]],
+                   [[short *top],    [top]])[
+{
+  YYFPRINTF (stderr, "Stack now");
+  for (/* Nothing. */; bottom <= top; ++bottom)
+    YYFPRINTF (stderr, " %d", *bottom);
+  YYFPRINTF (stderr, "\n");
+}
+
+# define YY_STACK_PRINT(Bottom, Top)                           \
+do {                                                           \
+  if (yydebug)                                                 \
+    yy_stack_print ((Bottom), (Top));                          \
+} while (0)
+
+
+/*------------------------------------------------.
+| Report that the YYRULE is going to be reduced.  |
+`------------------------------------------------*/
+
+]b4_c_function_def([yy_reduce_print], [static void],
+                   [[int yyrule], [yyrule]])[
+{
+  int yyi;
+  unsigned int yylineno = yyrline[yyrule];
+  YYFPRINTF (stderr, "Reducing stack by rule %d (line %u), ",
+             yyrule - 1, yylineno);
+  /* Print the symbols being reduced, and their result.  */
+  for (yyi = yyprhs[yyrule]; 0 <= yyrhs[yyi]; yyi++)
+    YYFPRINTF (stderr, "%s ", yytname [yyrhs[yyi]]);
+  YYFPRINTF (stderr, "-> %s\n", yytname [yyr1[yyrule]]);
+}
+
+# define YY_REDUCE_PRINT(Rule)         \
+do {                                   \
+  if (yydebug)                         \
+    yy_reduce_print (Rule);            \
+} while (0)
+

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


@@ -552,8 +597,11 @@ int yydebug;
 # define YYDPRINTF(Args)
 # define YYDSYMPRINT(Args)
 # define YYDSYMPRINTF(Title, Token, Value, Location)
 # define YYDPRINTF(Args)
 # define YYDSYMPRINT(Args)
 # define YYDSYMPRINTF(Title, Token, Value, Location)

+# define YY_STACK_PRINT(Bottom, Top)
+# define YY_REDUCE_PRINT(Rule)

 #endif /* !YYDEBUG */
 
 #endif /* !YYDEBUG */
 

+

 /* YYINITDEPTH -- initial size of the parser's stacks.  */
 #ifndef        YYINITDEPTH
 # define YYINITDEPTH ]b4_stack_depth_init[
 /* YYINITDEPTH -- initial size of the parser's stacks.  */
 #ifndef        YYINITDEPTH
 # define YYINITDEPTH ]b4_stack_depth_init[


@@ -633,7 +681,7 @@ yystpcpy (yydest, yysrc)
 
 #if YYDEBUG
 ]b4_yysymprint_generate([b4_c_function_def])[
 
 #if YYDEBUG
 ]b4_yysymprint_generate([b4_c_function_def])[

-#endif /* YYDEBUG. */
+#endif /* ! YYDEBUG */

 ]b4_yydestruct_generate([b4_c_function_def])
 \f
 
 ]b4_yydestruct_generate([b4_c_function_def])
 \f
 


@@ -647,7 +695,7 @@ int yyparse ();
 # endif
 #else /* ! YYPARSE_PARAM */
 b4_c_function_decl([yyparse], [int], b4_parse_param)
 # endif
 #else /* ! YYPARSE_PARAM */
 b4_c_function_decl([yyparse], [int], b4_parse_param)

-#endif
+#endif /* ! YYPARSE_PARAM */

 
 
 m4_divert_push([KILL])# ======================== M4 code.
 
 
 m4_divert_push([KILL])# ======================== M4 code.


@@ -662,7 +710,7 @@ int yychar;
 /* The semantic value of the lookahead symbol.  */
 YYSTYPE yylval;
 
 /* The semantic value of the lookahead symbol.  */
 YYSTYPE yylval;
 

-/* Number of parse errors so far.  */
+/* Number of syntax errors so far.  */

 int yynerrs;b4_location_if([
 /* Location data for the lookahead symbol.  */
 YYLTYPE yylloc;])
 int yynerrs;b4_location_if([
 /* Location data for the lookahead symbol.  */
 YYLTYPE yylloc;])


@@ -719,7 +767,8 @@ b4_c_function_def([yyparse], [int], b4_parse_param)
 [[  /* The location stack.  */
   YYLTYPE yylsa[YYINITDEPTH];
   YYLTYPE *yyls = yylsa;
 [[  /* The location stack.  */
   YYLTYPE yylsa[YYINITDEPTH];
   YYLTYPE *yyls = yylsa;

-  YYLTYPE *yylsp;]])[
+  YYLTYPE *yylsp;
+  YYLTYPE *yylerrsp;]])[

 
 #define YYPOPSTACK   (yyvsp--, yyssp--]b4_location_if([, yylsp--])[)
 
 
 #define YYPOPSTACK   (yyvsp--, yyssp--]b4_location_if([, yylsp--])[)
 


@@ -739,7 +788,7 @@ b4_c_function_def([yyparse], [int], b4_parse_param)
   yystate = 0;
   yyerrstatus = 0;
   yynerrs = 0;
   yystate = 0;
   yyerrstatus = 0;
   yynerrs = 0;

-  yychar = yytoken = YYEMPTY;          /* Cause a token to be read.  */
+  yychar = YYEMPTY;            /* Cause a token to be read.  */

 
   /* Initialize stack pointers.
      Waste one element of value and location stack
 
   /* Initialize stack pointers.
      Waste one element of value and location stack


@@ -849,22 +898,21 @@ yybackup:
 
   /* Not known => get a lookahead token if don't already have one.  */
 
 
   /* Not known => get a lookahead token if don't already have one.  */
 

-  /* YYTOKEN is either YYEMPTY or YYEOF or a valid token.  */
-  if (yytoken == YYEMPTY)
+  /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol.  */
+  if (yychar == YYEMPTY)

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

-      yytoken = YYTRANSLATE (yychar);

     }
 
     }
 

-  if (yytoken == YYEOF)
+  if (yychar <= YYEOF)

     {
     {

+      yychar = yytoken = YYEOF;

       YYDPRINTF ((stderr, "Now at end of input.\n"));
     }
   else
     {
       YYDPRINTF ((stderr, "Now at end of input.\n"));
     }
   else
     {

-      /* We have to keep this `#if YYDEBUG', since we use variables
-        which are defined only if `YYDEBUG' is set.  */
+      yytoken = YYTRANSLATE (yychar);

       YYDSYMPRINTF ("Next token is", yytoken, &yylval, &yylloc);
     }
 
       YYDSYMPRINTF ("Next token is", yytoken, &yylval, &yylloc);
     }
 


@@ -889,8 +937,8 @@ yybackup:
   YYDPRINTF ((stderr, "Shifting token %s, ", yytname[yytoken]));
 
   /* Discard the token being shifted unless it is eof.  */
   YYDPRINTF ((stderr, "Shifting token %s, ", yytname[yytoken]));
 
   /* Discard the token being shifted unless it is eof.  */

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

 
   *++yyvsp = yylval;
 ]b4_location_if([  *++yylsp = yylloc;])[
 
   *++yyvsp = yylval;
 ]b4_location_if([  *++yylsp = yylloc;])[


@@ -934,45 +982,20 @@ yyreduce:
 ]b4_location_if(
 [  /* Default location. */
   YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);])[
 ]b4_location_if(
 [  /* Default location. */
   YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);])[

-
-#if YYDEBUG
-  /* We have to keep this `#if YYDEBUG', since we use variables which
-     are defined only if `YYDEBUG' is set.  */
-  if (yydebug)
-    {
-      int yyi;
-
-      YYFPRINTF (stderr, "Reducing by rule %d (line %d), ",
-                yyn - 1, yyrline[yyn]);
-
-      /* Print the symbols being reduced, and their result.  */
-      for (yyi = yyprhs[yyn]; 0 <= yyrhs[yyi]; yyi++)
-       YYFPRINTF (stderr, "%s ", yytname[yyrhs[yyi]]);
-      YYFPRINTF (stderr, "-> %s\n", yytname[yyr1[yyn]]);
-    }
-#endif
+  YY_REDUCE_PRINT (yyn);

   switch (yyn)
     ]{
       b4_actions
     }
 
   switch (yyn)
     ]{
       b4_actions
     }
 

-/* Line __line__ of __file__.  */
+/* Line __line__ of yacc.c.  */

 b4_syncline([@oline@], [@ofile@])
 \f
 [  yyvsp -= yylen;
   yyssp -= yylen;
 ]b4_location_if([  yylsp -= yylen;])[
 
 b4_syncline([@oline@], [@ofile@])
 \f
 [  yyvsp -= yylen;
   yyssp -= yylen;
 ]b4_location_if([  yylsp -= yylen;])[
 

-#if YYDEBUG
-  if (yydebug)
-    {
-      short *yyssp1 = yyss - 1;
-      YYFPRINTF (stderr, "state stack now");
-      while (yyssp1 != yyssp)
-       YYFPRINTF (stderr, " %d", *++yyssp1);
-      YYFPRINTF (stderr, "\n");
-    }
-#endif
+  YY_STACK_PRINT (yyss, yyssp);

 
   *++yyvsp = yyval;
 ]b4_location_if([  *++yylsp = yyloc;])[
 
   *++yyvsp = yyval;
 ]b4_location_if([  *++yylsp = yyloc;])[


@@ -1017,12 +1040,12 @@ yyerrlab:
               yyx < (int) (sizeof (yytname) / sizeof (char *)); yyx++)
            if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
              yysize += yystrlen (yytname[yyx]) + 15, yycount++;
               yyx < (int) (sizeof (yytname) / sizeof (char *)); yyx++)
            if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
              yysize += yystrlen (yytname[yyx]) + 15, yycount++;

-         yysize += yystrlen ("parse error, unexpected ") + 1;
+         yysize += yystrlen ("syntax error, unexpected ") + 1;

          yysize += yystrlen (yytname[yytype]);
          yymsg = (char *) YYSTACK_ALLOC (yysize);
          if (yymsg != 0)
            {
          yysize += yystrlen (yytname[yytype]);
          yymsg = (char *) YYSTACK_ALLOC (yysize);
          if (yymsg != 0)
            {

-             char *yyp = yystpcpy (yymsg, "parse error, unexpected ");
+             char *yyp = yystpcpy (yymsg, "syntax error, unexpected ");

              yyp = yystpcpy (yyp, yytname[yytype]);
 
              if (yycount < 5)
              yyp = yystpcpy (yyp, yytname[yytype]);
 
              if (yycount < 5)


@@ -1043,26 +1066,22 @@ yyerrlab:
              YYSTACK_FREE (yymsg);
            }
          else
              YYSTACK_FREE (yymsg);
            }
          else

-           yyerror (]b4_yyerror_args["parse error; also virtual memory exhausted");
+           yyerror (]b4_yyerror_args["syntax error; also virtual memory exhausted");

        }
       else
 #endif /* YYERROR_VERBOSE */
        }
       else
 #endif /* YYERROR_VERBOSE */

-       yyerror (]b4_yyerror_args["parse error");
+       yyerror (]b4_yyerror_args["syntax error");

     }
     }

-  goto yyerrlab1;

 
 

+]b4_location_if([  yylerrsp = yylsp;])[

 
 

-/*----------------------------------------------------.
-| yyerrlab1 -- error raised explicitly by an action.  |
-`----------------------------------------------------*/
-yyerrlab1:

   if (yyerrstatus == 3)
     {
       /* If just tried and failed to reuse lookahead token after an
         error, discard it.  */
 
       /* Return failure if at end of input.  */
   if (yyerrstatus == 3)
     {
       /* If just tried and failed to reuse lookahead token after an
         error, discard it.  */
 
       /* Return failure if at end of input.  */

-      if (yytoken == YYEOF)
+      if (yychar == YYEOF)

         {
          /* Pop the error token.  */
           YYPOPSTACK;
         {
          /* Pop the error token.  */
           YYPOPSTACK;


@@ -1078,12 +1097,39 @@ yyerrlab1:
 
       YYDSYMPRINTF ("Error: discarding", yytoken, &yylval, &yylloc);
       yydestruct (yytoken, &yylval]b4_location_if([, &yylloc])[);
 
       YYDSYMPRINTF ("Error: discarding", yytoken, &yylval, &yylloc);
       yydestruct (yytoken, &yylval]b4_location_if([, &yylloc])[);

-      yytoken = YYEMPTY;
+      yychar = YYEMPTY;
+]b4_location_if([      *++yylerrsp = yylloc;])[

     }
 
   /* Else will try to reuse lookahead token after shifting the error
      token.  */
     }
 
   /* Else will try to reuse lookahead token after shifting the error
      token.  */

+  goto yyerrlab2;

 
 

+
+/*----------------------------------------------------.
+| yyerrlab1 -- error raised explicitly by an action.  |
+`----------------------------------------------------*/
+yyerrlab1:
+
+  /* Suppress GCC warning that yyerrlab1 is unused when no action
+     invokes YYERROR.  MacOS 10.2.3's buggy "smart preprocessor"
+     insists on the trailing semicolon.  */
+#if defined (__GNUC_MINOR__) && 2093 <= (__GNUC__ * 1000 + __GNUC_MINOR__)
+  /* GNU C++ (as of version 3.2.1) does not allow attributes on labels.  */
+# ifndef __cplusplus
+  __attribute__ ((__unused__));
+# endif
+#endif
+
+]b4_location_if([  yylerrsp = yylsp;
+  *++yylerrsp = yyloc;])[
+  goto yyerrlab2;
+
+
+/*---------------------------------------------------------------.
+| yyerrlab2 -- pop states until the error token can be shifted.  |
+`---------------------------------------------------------------*/
+yyerrlab2:

   yyerrstatus = 3;     /* Each real token shifted decrements this.  */
 
   for (;;)
   yyerrstatus = 3;     /* Each real token shifted decrements this.  */
 
   for (;;)


@@ -1109,17 +1155,7 @@ yyerrlab1:
       yyvsp--;
       yystate = *--yyssp;
 ]b4_location_if([      yylsp--;])[
       yyvsp--;
       yystate = *--yyssp;
 ]b4_location_if([      yylsp--;])[

-
-#if YYDEBUG
-      if (yydebug)
-       {
-         short *yyssp1 = yyss - 1;
-         YYFPRINTF (stderr, "Error: state stack now");
-         while (yyssp1 != yyssp)
-           YYFPRINTF (stderr, " %d", *++yyssp1);
-         YYFPRINTF (stderr, "\n");
-       }
-#endif
+      YY_STACK_PRINT (yyss, yyssp);

     }
 
   if (yyn == YYFINAL)
     }
 
   if (yyn == YYFINAL)


@@ -1128,7 +1164,8 @@ yyerrlab1:
   YYDPRINTF ((stderr, "Shifting error token, "));
 
   *++yyvsp = yylval;
   YYDPRINTF ((stderr, "Shifting error token, "));
 
   *++yyvsp = yylval;

-]b4_location_if([  *++yylsp = yylloc;])[
+]b4_location_if([  YYLLOC_DEFAULT (yyloc, yylsp, (yylerrsp - yylsp));
+  *++yylsp = yyloc;])[

 
   yystate = yyn;
   goto yynewstate;
 
   yystate = yyn;
   goto yynewstate;


@@ -1171,7 +1208,7 @@ b4_epilogue
 m4_if(b4_defines_flag, 0, [],
 [@output @output_header_name@
 b4_copyright([Skeleton parser for Yacc-like parsing with Bison],
 m4_if(b4_defines_flag, 0, [],
 [@output @output_header_name@
 b4_copyright([Skeleton parser for Yacc-like parsing with Bison],

-             [1984, 1989, 1990, 2000, 2001, 2002])
+             [1984, 1989, 1990, 2000, 2001, 2002, 2003])

 
 /* As a special exception, when this file is copied by Bison into a
    Bison output file, you may use that output file without restriction.
 
 /* As a special exception, when this file is copied by Bison into a
    Bison output file, you may use that output file without restriction.


@@ -1180,14 +1217,15 @@ b4_copyright([Skeleton parser for Yacc-like parsing with Bison],
 
 b4_token_defines(b4_tokens)
 
 
 b4_token_defines(b4_tokens)
 

-#ifndef YYSTYPE
+#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)

 m4_ifdef([b4_stype],
 [b4_syncline([b4_stype_line], [b4_filename])
 m4_ifdef([b4_stype],
 [b4_syncline([b4_stype_line], [b4_filename])

-typedef union b4_stype yystype;
-/* Line __line__ of __file__.  */
+typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])b4_stype YYSTYPE;
+/* Line __line__ of yacc.c.  */

 b4_syncline([@oline@], [@ofile@])],
 b4_syncline([@oline@], [@ofile@])],

-[typedef int yystype;])
-# define YYSTYPE yystype
+[typedef int YYSTYPE;])
+# define yystype YYSTYPE /* obsolescent; will be withdrawn */
+# define YYSTYPE_IS_DECLARED 1

 # define YYSTYPE_IS_TRIVIAL 1
 #endif
 
 # define YYSTYPE_IS_TRIVIAL 1
 #endif
 


@@ -1195,15 +1233,17 @@ b4_pure_if([],
 [extern YYSTYPE b4_prefix[]lval;])
 
 b4_location_if(
 [extern YYSTYPE b4_prefix[]lval;])
 
 b4_location_if(

-[#ifndef YYLTYPE
-typedef struct yyltype
+[#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED)
+typedef struct YYLTYPE

 {
   int first_line;
   int first_column;
   int last_line;
   int last_column;
 {
   int first_line;
   int first_column;
   int last_line;
   int last_column;

-} yyltype;
-# define YYLTYPE yyltype
+} YYLTYPE;
+# define yyltype YYLTYPE /* obsolescent; will be withdrawn */
+# define YYLTYPE_IS_DECLARED 1
+# define YYLTYPE_IS_TRIVIAL 1

 #endif
 
 m4_if(b4_pure, [0],
 #endif
 
 m4_if(b4_pure, [0],