X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/4d7aa45e7571be96bad8ccbb4c513404b9386717..455671735e6f4e9712c2f5ac1bc153b07b33e67b:/data/yacc.c

diff --git a/data/yacc.c b/data/yacc.c
index b0d051e2..6f847177 100644
--- a/data/yacc.c
+++ b/data/yacc.c
@@ -2,7 +2,7 @@ m4_divert(-1)                                                -*- C -*-
 
 # Yacc compatible skeleton for Bison
 
-# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005
+# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
 # Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
@@ -20,7 +20,7 @@ m4_divert(-1)                                                -*- C -*-
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 # 02110-1301  USA
 
-
+m4_include(b4_pkgdatadir/[c.m4])
 
 ## ---------------- ##
 ## Default values.  ##
@@ -36,20 +36,20 @@ m4_define_default([b4_stack_depth_init],  [200])
 ## ------------------------ ##
 
 
-# b4_pure_if(IF-TRUE, IF-FALSE)
-# -----------------------------
+# b4_yacc_pure_if(IF-TRUE, IF-FALSE)
+# ----------------------------------
 # Expand IF-TRUE, if %pure-parser and %parse-param, IF-FALSE otherwise.
-m4_define([b4_Pure_if],
+m4_define([b4_yacc_pure_if],
 [b4_pure_if([m4_ifset([b4_parse_param],
-                      [$1], [$2])],
-            [$2])])
+		      [$1], [$2])],
+	    [$2])])
 
 
 # b4_yyerror_args
 # ---------------
 # Arguments passed to yyerror: user args plus yylloc.
 m4_define([b4_yyerror_args],
-[b4_Pure_if([b4_location_if([&yylloc, ])])dnl
+[b4_yacc_pure_if([b4_location_if([&yylloc, ])])dnl
 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
 
 
@@ -71,18 +71,19 @@ m4_ifdef([b4_lex_param], b4_lex_param)))
 # b4_int_type(MIN, MAX)
 # ---------------------
 # Return the smallest int type able to handle numbers ranging from
-# MIN to MAX (included).  We overwrite the version from c.m4 which relies
-# on "signed char" which is not portable to old K&R compilers.
+# MIN to MAX (included).  Overwrite the version from c.m4, which
+# uses only C89 types, so that the user can override the shorter
+# types, and so that pre-C89 compilers are handled correctly.
 m4_define([b4_int_type],
-[m4_if(b4_ints_in($@,      [0],   [255]), [1], [unsigned char],
-       b4_ints_in($@,   [-128],   [127]), [1], [yysigned_char],
+[m4_if(b4_ints_in($@,      [0],   [255]), [1], [yytype_uint8],
+       b4_ints_in($@,   [-128],   [127]), [1], [yytype_int8],
 
-       b4_ints_in($@,      [0], [65535]), [1], [unsigned short int],
-       b4_ints_in($@, [-32768], [32767]), [1], [short int],
+       b4_ints_in($@,      [0], [65535]), [1], [yytype_uint16],
+       b4_ints_in($@, [-32768], [32767]), [1], [yytype_int16],
 
        m4_eval([0 <= $1]),                [1], [unsigned int],
 
-	                                       [int])])
+					       [int])])
 
 
 ## ----------------- ##
@@ -102,7 +103,7 @@ m4_define([b4_lhs_value],
 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
 # symbols on RHS.
 m4_define([b4_rhs_value],
-[(yyvsp@{m4_eval([$2 - $1])@}m4_ifval([$3], [.$3]))])
+[(yyvsp@{($2) - ($1)@}m4_ifval([$3], [.$3]))])
 
 
 
@@ -122,7 +123,7 @@ m4_define([b4_lhs_location],
 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
 # on RHS.
 m4_define([b4_rhs_location],
-[(yylsp@{m4_eval([$2 - $1])@})])
+[(yylsp@{($2) - ($1)@})])
 
 
 
@@ -135,15 +136,15 @@ m4_changecom()
 m4_divert(0)dnl
 @output @output_parser_name@
 b4_copyright([Skeleton parser for Yacc-like parsing with Bison],
-             [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005])[
+  [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])[
 
 /* As a special exception, when this file is copied by Bison into a
    Bison output file, you may use that output file without restriction.
    This special exception was added by the Free Software Foundation
    in version 1.24 of Bison.  */
 
-/* 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.  */
 
 /* All symbols defined below should begin with yy or YY, to avoid
    infringing on user name space.  This should be done even for local
@@ -187,19 +188,20 @@ b4_location_if([#define yylloc b4_prefix[]lloc])])[
 # define YYTOKEN_TABLE ]b4_token_table[
 #endif
 
-#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 ]m4_ifdef([b4_stype],
-[b4_syncline([b4_stype_line], [b4_file_name])
-typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])b4_stype YYSTYPE;
+[typedef union[]m4_bregexp(b4_stype, [^{], [ YYSTYPE])
+b4_stype
 /* Line __line__ of yacc.c.  */
-b4_syncline([@oline@], [@ofile@])],
+b4_syncline([@oline@], [@ofile@])
+	YYSTYPE;],
 [typedef int YYSTYPE;])[
 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
 # define YYSTYPE_IS_DECLARED 1
 # define YYSTYPE_IS_TRIVIAL 1
 #endif
 
-]b4_location_if([#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED)
+]b4_location_if([#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
 typedef struct YYLTYPE
 {
   int first_line;
@@ -219,23 +221,42 @@ typedef struct YYLTYPE
 /* Line __line__ of yacc.c.  */
 b4_syncline([@oline@], [@ofile@])[
 
-/* Define YYMODERN_C if this compiler supports C89 or better.  Some
-   modern compilers (e.g., IBM xlc 7.0) don't define __STDC__ for
-   pedantic reasons, but they define __STDC_VERSION__ so check that
-   as well.  Consider a C++ compiler to be modern if it defines
-   __cplusplus.  */
-#if defined (__STDC__) || defined (__STDC_VERSION__) || defined (__cplusplus)
-# define YYMODERN_C 1
+#ifdef short
+# undef short
+#endif
+
+#ifdef YYTYPE_UINT8
+typedef YYTYPE_UINT8 yytype_uint8;
+#else
+typedef unsigned char yytype_uint8;
+#endif
+
+#ifdef YYTYPE_INT8
+typedef YYTYPE_INT8 yytype_int8;
+#elif ]b4_c_modern[
+typedef signed char yytype_int8;
+#else
+typedef short int yytype_int8;
+#endif
+
+#ifdef YYTYPE_UINT16
+typedef YYTYPE_UINT16 yytype_uint16;
 #else
-# define YYMODERN_C 0
+typedef unsigned short int yytype_uint16;
+#endif
+
+#ifdef YYTYPE_INT16
+typedef YYTYPE_INT16 yytype_int16;
+#else
+typedef short int yytype_int16;
 #endif
 
 #ifndef YYSIZE_T
-# if defined (__SIZE_TYPE__)
+# ifdef __SIZE_TYPE__
 #  define YYSIZE_T __SIZE_TYPE__
-# elif defined (size_t)
+# elif defined size_t
 #  define YYSIZE_T size_t
-# elif ! defined (YYSIZE_T) && YYMODERN_C
+# elif ! defined YYSIZE_T && ]b4_c_modern[
 #  include <stddef.h> /* INFRINGES ON USER NAME SPACE */
 #  define YYSIZE_T size_t
 # else
@@ -258,9 +279,23 @@ b4_syncline([@oline@], [@ofile@])[
 #endif
 
 /* Suppress unused-variable warnings by "using" E.  */
-#define YYUSE(e) do {;} while (/*CONSTCOND*/ 0 && (e))
+#if ! defined lint || defined __GNUC__
+# define YYUSE(e) ((void) (e))
+#else
+# define YYUSE(e) /* empty */
+#endif
+
+/* Identity function, used to suppress warnings about constant conditions.  */
+#ifndef lint
+# define YYID(n) (n)
+#else
+]b4_c_function_def([YYID], [static int], [[int i], [i]])[
+{
+  return i;
+}
+#endif
 
-#if ! defined (yyoverflow) || YYERROR_VERBOSE
+#if ! defined yyoverflow || YYERROR_VERBOSE
 
 /* The parser invokes alloca or malloc; define the necessary symbols.  */
 
@@ -268,16 +303,16 @@ b4_syncline([@oline@], [@ofile@])[
 #  if YYSTACK_USE_ALLOCA
 #   ifdef __GNUC__
 #    define YYSTACK_ALLOC __builtin_alloca
-#   elif defined (__BUILTIN_VA_ARG_INCR)
+#   elif defined __BUILTIN_VA_ARG_INCR
 #    include <alloca.h> /* INFRINGES ON USER NAME SPACE */
-#   elif defined (_AIX)
+#   elif defined _AIX
 #    define YYSTACK_ALLOC __alloca
-#   elif defined (_MSC_VER)
+#   elif defined _MSC_VER
 #    include <malloc.h> /* INFRINGES ON USER NAME SPACE */
 #    define alloca _alloca
 #   else
 #    define YYSTACK_ALLOC alloca
-#    if ! defined (_ALLOCA_H) && ! defined (_STDLIB_H) && YYMODERN_C
+#    if ! defined _ALLOCA_H && ! defined _STDLIB_H && ]b4_c_modern[
 #     include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
 #     ifndef _STDLIB_H
 #      define _STDLIB_H 1
@@ -288,14 +323,14 @@ b4_syncline([@oline@], [@ofile@])[
 # endif
 
 # ifdef YYSTACK_ALLOC
-   /* Pacify GCC's `empty if-body' warning. */
-#  define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
+   /* Pacify GCC's `empty if-body' warning.  */
+#  define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
 #  ifndef YYSTACK_ALLOC_MAXIMUM
     /* The OS might guarantee only one guard page at the bottom of the stack,
        and a page size can be as small as 4096 bytes.  So we cannot safely
        invoke alloca (N) if N exceeds 4096.  Use a slightly smaller number
        to allow for a few compiler-allocated temporary stack slots.  */
-#   define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2005 */
+#   define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
 #  endif
 # else
 #  define YYSTACK_ALLOC YYMALLOC
@@ -303,37 +338,39 @@ b4_syncline([@oline@], [@ofile@])[
 #  ifndef YYSTACK_ALLOC_MAXIMUM
 #   define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
 #  endif
-#  ifdef __cplusplus
-extern "C" {
+#  if (defined __cplusplus && ! defined _STDLIB_H \
+       && ! ((defined YYMALLOC || defined malloc) \
+	     && (defined YYFREE || defined free)))
+#   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
+#   ifndef _STDLIB_H
+#    define _STDLIB_H 1
+#   endif
 #  endif
 #  ifndef YYMALLOC
 #   define YYMALLOC malloc
-#   if ! defined (malloc) && ! defined (_STDLIB_H) && YYMODERN_C
+#   if ! defined malloc && ! defined _STDLIB_H && ]b4_c_modern[
 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
 #   endif
 #  endif
 #  ifndef YYFREE
 #   define YYFREE free
-#   if ! defined (free) && ! defined (_STDLIB_H)  && YYMODERN_C
+#   if ! defined free && ! defined _STDLIB_H && ]b4_c_modern[
 void free (void *); /* INFRINGES ON USER NAME SPACE */
 #   endif
 #  endif
-#  ifdef __cplusplus
-}
-#  endif
 # endif
-#endif /* ! defined (yyoverflow) || YYERROR_VERBOSE */
+#endif /* ! defined yyoverflow || YYERROR_VERBOSE */
 
 
-#if (! defined (yyoverflow) \
-     && (! defined (__cplusplus) \
-	 || (]b4_location_if([[defined (YYLTYPE_IS_TRIVIAL) && YYLTYPE_IS_TRIVIAL \
-             && ]])[defined (YYSTYPE_IS_TRIVIAL) && YYSTYPE_IS_TRIVIAL)))
+#if (! defined yyoverflow \
+     && (! defined __cplusplus \
+	 || (]b4_location_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
+	     && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
 
 /* A type that is properly aligned for any stack member.  */
 union yyalloc
 {
-  short int yyss;
+  yytype_int16 yyss;
   YYSTYPE yyvs;
   ]b4_location_if([  YYLTYPE yyls;
 ])dnl
@@ -346,16 +383,16 @@ union yyalloc
    N elements.  */
 ]b4_location_if(
 [# define YYSTACK_BYTES(N) \
-     ((N) * (sizeof (short int) + sizeof (YYSTYPE) + sizeof (YYLTYPE))	\
+     ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
       + 2 * YYSTACK_GAP_MAXIMUM)],
 [# define YYSTACK_BYTES(N) \
-     ((N) * (sizeof (short int) + sizeof (YYSTYPE))			\
+     ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
       + YYSTACK_GAP_MAXIMUM)])[
 
 /* Copy COUNT objects from FROM to TO.  The source and destination do
    not overlap.  */
 # ifndef YYCOPY
-#  if defined (__GNUC__) && 1 < __GNUC__
+#  if defined __GNUC__ && 1 < __GNUC__
 #   define YYCOPY(To, From, Count) \
       __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
 #  else
@@ -366,7 +403,7 @@ union yyalloc
 	  for (yyi = 0; yyi < (Count); yyi++)	\
 	    (To)[yyi] = (From)[yyi];		\
 	}					\
-      while (/*CONSTCOND*/ 0)
+      while (YYID (0))
 #  endif
 # endif
 
@@ -384,28 +421,22 @@ union yyalloc
 	yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
 	yyptr += yynewbytes / sizeof (*yyptr);				\
       }									\
-    while (/*CONSTCOND*/ 0)
-
-#endif
+    while (YYID (0))
 
-#if YYMODERN_C
-   typedef signed char yysigned_char;
-#else
-   typedef short int yysigned_char;
 #endif
 
-/* YYFINAL -- State number of the termination state. */
+/* YYFINAL -- State number of the termination state.  */
 #define YYFINAL  ]b4_final_state_number[
 /* YYLAST -- Last index in YYTABLE.  */
 #define YYLAST   ]b4_last[
 
-/* YYNTOKENS -- Number of terminals. */
+/* YYNTOKENS -- Number of terminals.  */
 #define YYNTOKENS  ]b4_tokens_number[
-/* YYNNTS -- Number of nonterminals. */
+/* YYNNTS -- Number of nonterminals.  */
 #define YYNNTS  ]b4_nterms_number[
-/* YYNRULES -- Number of rules. */
+/* YYNRULES -- Number of rules.  */
 #define YYNRULES  ]b4_rules_number[
-/* YYNRULES -- Number of states. */
+/* YYNRULES -- Number of states.  */
 #define YYNSTATES  ]b4_states_number[
 
 /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
@@ -429,7 +460,7 @@ static const ]b4_int_type_for([b4_prhs])[ yyprhs[] =
   ]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[] =
 {
   ]b4_rhs[
@@ -444,7 +475,7 @@ static const ]b4_int_type_for([b4_rline])[ yyrline[] =
 
 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
 /* YYTNAME[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[] =
 {
   ]b4_tname[
@@ -480,7 +511,7 @@ static const ]b4_int_type_for([b4_defact])[ yydefact[] =
   ]b4_defact[
 };
 
-/* YYDEFGOTO[NTERM-NUM]. */
+/* YYDEFGOTO[NTERM-NUM].  */
 static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =
 {
   ]b4_defgoto[
@@ -547,7 +578,7 @@ do								\
       yychar = (Token);						\
       yylval = (Value);						\
       yytoken = YYTRANSLATE (yychar);				\
-      YYPOPSTACK;						\
+      YYPOPSTACK (1);						\
       goto yybackup;						\
     }								\
   else								\
@@ -555,7 +586,7 @@ do								\
       yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
       YYERROR;							\
     }								\
-while (/*CONSTCOND*/ 0)
+while (YYID (0))
 
 
 #define YYTERROR	1
@@ -570,7 +601,7 @@ while (/*CONSTCOND*/ 0)
 #ifndef YYLLOC_DEFAULT
 # define YYLLOC_DEFAULT(Current, Rhs, N)				\
     do									\
-      if (N)								\
+      if (YYID (N))                                                    \
 	{								\
 	  (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;	\
 	  (Current).first_column = YYRHSLOC (Rhs, 1).first_column;	\
@@ -584,7 +615,7 @@ while (/*CONSTCOND*/ 0)
 	  (Current).first_column = (Current).last_column =		\
 	    YYRHSLOC (Rhs, 0).last_column;				\
 	}								\
-    while (/*CONSTCOND*/ 0)
+    while (YYID (0))
 #endif
 
 
@@ -596,8 +627,8 @@ while (/*CONSTCOND*/ 0)
 # if YYLTYPE_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)
+	      (Loc).first_line, (Loc).first_column,	\
+	      (Loc).last_line,  (Loc).last_column)
 # else
 #  define YY_LOCATION_PRINT(File, Loc) ((void) 0)
 # endif
@@ -624,18 +655,20 @@ while (/*CONSTCOND*/ 0)
 do {						\
   if (yydebug)					\
     YYFPRINTF Args;				\
-} while (/*CONSTCOND*/ 0)
+} while (YYID (0))
 
-# define YY_SYMBOL_PRINT(Title, Type, Value, Location)		\
-do {								\
-  if (yydebug)							\
-    {								\
-      YYFPRINTF (stderr, "%s ", Title);				\
-      yysymprint (stderr,					\
-                  Type, Value]b4_location_if([, Location])[);	\
-      YYFPRINTF (stderr, "\n");					\
-    }								\
-} while (/*CONSTCOND*/ 0)
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location)			  \
+do {									  \
+  if (yydebug)								  \
+    {									  \
+      YYFPRINTF (stderr, "%s ", Title);					  \
+      yy_symbol_print (stderr,						  \
+		  Type, Value]b4_location_if([, Location])[]b4_user_args[); \
+      YYFPRINTF (stderr, "\n");						  \
+    }									  \
+} while (YYID (0))
+
+]b4_yy_symbol_print_generate([b4_c_function_def])[
 
 /*------------------------------------------------------------------.
 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
@@ -643,11 +676,11 @@ do {								\
 `------------------------------------------------------------------*/
 
 ]b4_c_function_def([yy_stack_print], [static void],
-                   [[short int *bottom], [bottom]],
-                   [[short int *top],    [top]])[
+		   [[yytype_int16 *bottom], [bottom]],
+		   [[yytype_int16 *top],    [top]])[
 {
   YYFPRINTF (stderr, "Stack now");
-  for (/* Nothing. */; bottom <= top; ++bottom)
+  for (; bottom <= top; ++bottom)
     YYFPRINTF (stderr, " %d", *bottom);
   YYFPRINTF (stderr, "\n");
 }
@@ -656,7 +689,7 @@ do {								\
 do {								\
   if (yydebug)							\
     yy_stack_print ((Bottom), (Top));				\
-} while (/*CONSTCOND*/ 0)
+} while (YYID (0))
 
 
 /*------------------------------------------------.
@@ -664,23 +697,33 @@ do {								\
 `------------------------------------------------*/
 
 ]b4_c_function_def([yy_reduce_print], [static void],
-                   [[int yyrule], [yyrule]])[
+		   [[YYSTYPE *yyvsp], [yyvsp]],
+    b4_location_if([[[YYLTYPE *yylsp], [yylsp]],])
+		   [[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,])
+		   b4_parse_param)[
 {
+  int yynrhs = yyr2[yyrule];
   int yyi;
   unsigned long int yylno = yyrline[yyrule];
-  YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu), ",
-             yyrule - 1, yylno);
-  /* 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]]);
+  YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
+	     yyrule - 1, yylno);
+  /* The symbols being reduced.  */
+  for (yyi = 0; yyi < yynrhs; yyi++)
+    {
+      fprintf (stderr, "   $%d = ", yyi + 1);
+      yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
+		       &]b4_rhs_value(yynrhs, yyi + 1)[
+		       ]b4_location_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
+		       b4_user_args[);
+      fprintf (stderr, "\n");
+    }
 }
 
 # define YY_REDUCE_PRINT(Rule)		\
 do {					\
   if (yydebug)				\
-    yy_reduce_print (Rule);		\
-} while (/*CONSTCOND*/ 0)
+    yy_reduce_print (yyvsp, ]b4_location_if([yylsp, ])[Rule]b4_user_args[); \
+} while (YYID (0))
 
 /* Nonzero means print parse trace.  It is left uninitialized so that
    multiple parsers can coexist.  */
@@ -714,42 +757,29 @@ int yydebug;
 #if YYERROR_VERBOSE
 
 # ifndef yystrlen
-#  if defined (__GLIBC__) && defined (_STRING_H)
+#  if defined __GLIBC__ && defined _STRING_H
 #   define yystrlen strlen
 #  else
 /* Return the length of YYSTR.  */
-static YYSIZE_T
-#   if YYMODERN_C
-yystrlen (const char *yystr)
-#   else
-yystrlen (yystr)
-     const char *yystr;
-#   endif
+]b4_c_function_def([yystrlen], [static YYSIZE_T],
+   [[const char *yystr], [yystr]])[
 {
-  const char *yys = yystr;
-
-  while (*yys++ != '\0')
+  YYSIZE_T yylen;
+  for (yylen = 0; yystr[yylen]; yylen++)
     continue;
-
-  return yys - yystr - 1;
+  return yylen;
 }
 #  endif
 # endif
 
 # ifndef yystpcpy
-#  if defined (__GLIBC__) && defined (_STRING_H) && defined (_GNU_SOURCE)
+#  if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
 #   define yystpcpy stpcpy
 #  else
 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
    YYDEST.  */
-static char *
-#   if YYMODERN_C
-yystpcpy (char *yydest, const char *yysrc)
-#   else
-yystpcpy (yydest, yysrc)
-     char *yydest;
-     const char *yysrc;
-#   endif
+]b4_c_function_def([yystpcpy], [static char *],
+   [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
 {
   char *yyd = yydest;
   const char *yys = yysrc;
@@ -837,7 +867,7 @@ yysyntax_error (char *yyresult, int yystate, int yychar)
 
 # if 0
       /* This is so xgettext sees the translatable formats that are
-         constructed on the fly.  */
+	 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");
@@ -850,13 +880,13 @@ yysyntax_error (char *yyresult, int yystate, int yychar)
       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))];
+		    + 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
-         YYCHECK.  */
+	 YYCHECK.  */
       int yyxbegin = yyn < 0 ? -yyn : 0;
 
       /* Stay within bounds of both yycheck and yytname.  */
@@ -868,26 +898,26 @@ yysyntax_error (char *yyresult, int yystate, int yychar)
       yyfmt = yystpcpy (yyformat, yyunexpected);
 
       for (yyx = yyxbegin; yyx < yyxend; ++yyx)
-        if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
-          {
-            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]);
-            yysize_overflow |= yysize1 < yysize;
-            yysize = yysize1;
-            yyfmt = yystpcpy (yyfmt, yyprefix);
-            yyprefix = yyor;
-          }
+	if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
+	  {
+	    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]);
+	    yysize_overflow |= (yysize1 < yysize);
+	    yysize = yysize1;
+	    yyfmt = yystpcpy (yyfmt, yyprefix);
+	    yyprefix = yyor;
+	  }
 
       yyf = YY_(yyformat);
       yysize1 = yysize + yystrlen (yyf);
-      yysize_overflow |= yysize1 < yysize;
+      yysize_overflow |= (yysize1 < yysize);
       yysize = yysize1;
 
       if (yysize_overflow)
@@ -895,51 +925,45 @@ yysyntax_error (char *yyresult, int yystate, int yychar)
 
       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))
-            {
-              if (*yyp == '%' && yyf[1] == 's' && yyi < yycount)
-                {
-                  yyp += yytnamerr (yyp, yyarg[yyi++]);
-                  yyf += 2;
-                }
-              else
-                {
-                  yyp++;
-                  yyf++;
-                }
-            }
-        }
+	  /* 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;
     }
 }
 #endif /* YYERROR_VERBOSE */
 
 
-#if YYDEBUG
-]b4_yysymprint_generate([b4_c_function_def])[
-#endif /* ! YYDEBUG */
-]b4_yydestruct_generate([b4_c_function_def])
+]b4_yydestruct_generate([b4_c_function_def])[
 
 
 /* Prevent warnings from -Wmissing-prototypes.  */
 
 #ifdef YYPARSE_PARAM
-# if YYMODERN_C
-int yyparse (void *YYPARSE_PARAM);
-# else
-int yyparse ();
-# endif
+]b4_c_function_decl([yyparse], [int],
+   [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
 #else /* ! YYPARSE_PARAM */
-b4_c_function_decl([yyparse], [int], b4_parse_param)
+]b4_c_function_decl([yyparse], [int], b4_parse_param)[
 #endif /* ! YYPARSE_PARAM */
 
 
-m4_divert_push([KILL])# ======================== M4 code.
+]m4_divert_push([KILL])# ======================== M4 code.
 # b4_declare_parser_variables
 # ---------------------------
 # Declare the variables that are global, or local to YYPARSE if
@@ -959,7 +983,7 @@ YYLTYPE yylloc;])
 m4_divert_pop([KILL])dnl# ====================== End of M4 code.
 
 b4_pure_if([],
-           [b4_declare_parser_variables])
+	   [b4_declare_parser_variables])
 
 
 /*----------.
@@ -967,12 +991,7 @@ b4_pure_if([],
 `----------*/
 
 #ifdef YYPARSE_PARAM
-# if YYMODERN_C
-int yyparse (void *YYPARSE_PARAM)
-# else
-int yyparse (YYPARSE_PARAM)
-  void *YYPARSE_PARAM;
-# endif
+b4_c_function_def([yyparse], [int], [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])
 #else /* ! YYPARSE_PARAM */
 b4_c_function_def([yyparse], [int], b4_parse_param)
 #endif
@@ -1001,9 +1020,9 @@ b4_c_function_def([yyparse], [int], b4_parse_param)
      to reallocate them elsewhere.  */
 
   /* The state stack.  */
-  short int yyssa[YYINITDEPTH];
-  short int *yyss = yyssa;
-  short int *yyssp;
+  yytype_int16 yyssa[YYINITDEPTH];
+  yytype_int16 *yyss = yyssa;
+  yytype_int16 *yyssp;
 
   /* The semantic value stack.  */
   YYSTYPE yyvsa[YYINITDEPTH];
@@ -1015,10 +1034,10 @@ b4_c_function_def([yyparse], [int], b4_parse_param)
   YYLTYPE yylsa[YYINITDEPTH];
   YYLTYPE *yyls = yylsa;
   YYLTYPE *yylsp;
-  /* The locations where the error started and ended. */
+  /* The locations where the error started and ended.  */
   YYLTYPE yyerror_range[2];]])[
 
-#define YYPOPSTACK   (yyvsp--, yyssp--]b4_location_if([, yylsp--])[)
+#define YYPOPSTACK(N)   (yyvsp -= (N), yyssp -= (N)]b4_location_if([, yylsp -= (N)])[)
 
   YYSIZE_T yystacksize = YYINITDEPTH;
 
@@ -1027,9 +1046,9 @@ b4_c_function_def([yyparse], [int], b4_parse_param)
   YYSTYPE yyval;
 ]b4_location_if([  YYLTYPE yyloc;])[
 
-  /* When reducing, the number of symbols on the RHS of the reduced
-     rule.  */
-  int yylen;
+  /* The number of symbols on the RHS of the reduced rule.
+     Keep to zero when no symbol should be popped.  */
+  int yylen = 0;
 
   YYDPRINTF ((stderr, "Starting parse\n"));
 
@@ -1055,7 +1074,7 @@ b4_c_function_def([yyparse], [int], b4_parse_param)
 m4_ifdef([b4_initial_action], [
 m4_pushdef([b4_at_dollar],     [m4_define([b4_at_dollar_used])yylloc])dnl
 m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl
-  /* User initialization code. */
+  /* User initialization code.  */
 b4_initial_action
 m4_popdef([b4_dollar_dollar])dnl
 m4_popdef([b4_at_dollar])dnl
@@ -1073,8 +1092,7 @@ m4_ifdef([b4_at_dollar_used], [[  yylsp[0] = yylloc;
 `------------------------------------------------------------*/
  yynewstate:
   /* In all cases, when you get here, the value and location stacks
-     have just been pushed. so pushing a state here evens the stacks.
-     */
+     have just been pushed.  So pushing a state here evens the stacks.  */
   yyssp++;
 
  yysetstate:
@@ -1087,11 +1105,11 @@ m4_ifdef([b4_at_dollar_used], [[  yylsp[0] = yylloc;
 
 #ifdef yyoverflow
       {
-	/* Give user a chance to reallocate the stack. Use copies of
+	/* Give user a chance to reallocate the stack.  Use copies of
 	   these so that the &'s don't force the real ones into
 	   memory.  */
 	YYSTYPE *yyvs1 = yyvs;
-	short int *yyss1 = yyss;
+	yytype_int16 *yyss1 = yyss;
 ]b4_location_if([	YYLTYPE *yyls1 = yyls;])[
 
 	/* Each stack pointer address is followed by the size of the
@@ -1119,7 +1137,7 @@ m4_ifdef([b4_at_dollar_used], [[  yylsp[0] = yylloc;
 	yystacksize = YYMAXDEPTH;
 
       {
-	short int *yyss1 = yyss;
+	yytype_int16 *yyss1 = yyss;
 	union yyalloc *yyptr =
 	  (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
 	if (! yyptr)
@@ -1154,12 +1172,10 @@ m4_ifdef([b4_at_dollar_used], [[  yylsp[0] = yylloc;
 `-----------*/
 yybackup:
 
-/* Do appropriate processing given the current state.  */
-/* Read a look-ahead token if we need one and don't already have one.  */
-/* yyresume: */
+  /* Do appropriate processing given the current state.  Read a
+     look-ahead token if we need one and don't already have one.  */
 
   /* First try to decide what to do without reference to look-ahead token.  */
-
   yyn = yypact[yystate];
   if (yyn == YYPACT_NINF)
     goto yydefault;
@@ -1201,22 +1217,21 @@ yybackup:
   if (yyn == YYFINAL)
     YYACCEPT;
 
+  /* Count tokens shifted since error; after three, turn off error
+     status.  */
+  if (yyerrstatus)
+    yyerrstatus--;
+
   /* Shift the look-ahead token.  */
   YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
 
-  /* Discard the token being shifted unless it is eof.  */
+  /* Discard the shifted token unless it is eof.  */
   if (yychar != YYEOF)
     yychar = YYEMPTY;
 
+  yystate = yyn;
   *++yyvsp = yylval;
 ]b4_location_if([  *++yylsp = yylloc;])[
-
-  /* Count tokens shifted since error; after three, turn off error
-     status.  */
-  if (yyerrstatus)
-    yyerrstatus--;
-
-  yystate = yyn;
   goto yynewstate;
 
 
@@ -1248,22 +1263,20 @@ yyreduce:
   yyval = yyvsp[1-yylen];
 
 ]b4_location_if(
-[[  /* Default location. */
-  YYLLOC_DEFAULT (yyloc, yylsp - yylen, yylen);]])[
+[[  /* Default location.  */
+  YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
   YY_REDUCE_PRINT (yyn);
   switch (yyn)
-    ]{
-      b4_actions
+    {
+      ]b4_actions
+/* Line __line__ of yacc.c.  */
+b4_syncline([@oline@], [@ofile@])[
       default: break;
     }
+  YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
 
-/* Line __line__ of yacc.c.  */
-b4_syncline([@oline@], [@ofile@])
-
-[  yyvsp -= yylen;
-  yyssp -= yylen;
-]b4_location_if([  yylsp -= yylen;])[
-
+  YYPOPSTACK (yylen);
+  yylen = 0;
   YY_STACK_PRINT (yyss, yyssp);
 
   *++yyvsp = yyval;
@@ -1337,14 +1350,15 @@ yyerrlab:
 	 error, discard it.  */
 
       if (yychar <= YYEOF)
-        {
+	{
 	  /* Return failure if at end of input.  */
 	  if (yychar == YYEOF)
 	    YYABORT;
-        }
+	}
       else
 	{
-	  yydestruct ("Error: discarding", yytoken, &yylval]b4_location_if([, &yylloc])[);
+	  yydestruct ("Error: discarding",
+		      yytoken, &yylval]b4_location_if([, &yylloc])[]b4_user_args[);
 	  yychar = YYEMPTY;
 	}
     }
@@ -1366,9 +1380,11 @@ yyerrorlab:
      goto yyerrorlab;
 
 ]b4_location_if([[  yyerror_range[0] = yylsp[1-yylen];
-  yylsp -= yylen;
-  ]])[yyvsp -= yylen;
-  yyssp -= yylen;
+]])[  /* Do not reclaim the symbols of the rule which action triggered
+     this YYERROR.  */
+  YYPOPSTACK (yylen);
+  yylen = 0;
+  YY_STACK_PRINT (yyss, yyssp);
   yystate = *yyssp;
   goto yyerrlab1;
 
@@ -1398,8 +1414,9 @@ yyerrlab1:
 	YYABORT;
 
 ]b4_location_if([[      yyerror_range[0] = *yylsp;]])[
-      yydestruct ("Error: popping", yystos[yystate], yyvsp]b4_location_if([, yylsp])[);
-      YYPOPSTACK;
+      yydestruct ("Error: popping",
+		  yystos[yystate], yyvsp]b4_location_if([, yylsp])[]b4_user_args[);
+      YYPOPSTACK (1);
       yystate = *yyssp;
       YY_STACK_PRINT (yyss, yyssp);
     }
@@ -1411,11 +1428,11 @@ yyerrlab1:
 ]b4_location_if([[
   yyerror_range[1] = yylloc;
   /* Using YYLLOC is tempting, but would change the location of
-     the look-ahead.  YYLOC is available though. */
-  YYLLOC_DEFAULT (yyloc, yyerror_range - 1, 2);
+     the look-ahead.  YYLOC is available though.  */
+  YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2);
   *++yylsp = yyloc;]])[
 
-  /* Shift the error token. */
+  /* Shift the error token.  */
   YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
 
   yystate = yyn;
@@ -1449,12 +1466,16 @@ yyexhaustedlab:
 yyreturn:
   if (yychar != YYEOF && yychar != YYEMPTY)
      yydestruct ("Cleanup: discarding lookahead",
-		 yytoken, &yylval]b4_location_if([, &yylloc])[);
+		 yytoken, &yylval]b4_location_if([, &yylloc])[]b4_user_args[);
+  /* Do not reclaim the symbols of the rule which action triggered
+     this YYABORT or YYACCEPT.  */
+  YYPOPSTACK (yylen);
+  YY_STACK_PRINT (yyss, yyssp);
   while (yyssp != yyss)
     {
       yydestruct ("Cleanup: popping",
-		  yystos[*yyssp], yyvsp]b4_location_if([, yylsp])[);
-      YYPOPSTACK;
+		  yystos[*yyssp], yyvsp]b4_location_if([, yylsp])[]b4_user_args[);
+      YYPOPSTACK (1);
     }
 #ifndef yyoverflow
   if (yyss != yyssa)
@@ -1472,7 +1493,7 @@ b4_epilogue
 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, 2003, 2004, 2005])
+  [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])
 
 /* As a special exception, when this file is copied by Bison into a
    Bison output file, you may use that output file without restriction.
@@ -1481,12 +1502,13 @@ b4_copyright([Skeleton parser for Yacc-like parsing with Bison],
 
 b4_token_enums_defines(b4_tokens)
 
-#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 m4_ifdef([b4_stype],
-[b4_syncline([b4_stype_line], [b4_file_name])
-typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])b4_stype YYSTYPE;
+[typedef union[]m4_bregexp(b4_stype, [^{], [ YYSTYPE])
+b4_stype
 /* Line __line__ of yacc.c.  */
-b4_syncline([@oline@], [@ofile@])],
+b4_syncline([@oline@], [@ofile@])
+	YYSTYPE;],
 [typedef int YYSTYPE;])
 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
 # define YYSTYPE_IS_DECLARED 1
@@ -1497,7 +1519,7 @@ b4_pure_if([],
 [extern YYSTYPE b4_prefix[]lval;])
 
 b4_location_if(
-[#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED)
+[#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
 typedef struct YYLTYPE
 {
   int first_line;