Initial checkin of YAML substances.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3772 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1494 insertions, 0 deletions

diff --git a/ext/syck/gram.c b/ext/syck/gram.c
new file mode 100644
index 0000000000..5ea28ce621
--- /dev/null
+++ b/ext/syck/gram.c
@@ -0,0 +1,1494 @@
+/* A Bison parser, made from gram.y, by GNU bison 1.75.  */
+
+/* Skeleton parser for Yacc-like parsing with Bison,
+   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002 Free Software Foundation, Inc.
+
+   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
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* 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.  */
+
+/* All symbols defined below should begin with yy or YY, to avoid
+   infringing on user name space.  This should be done even for local
+   variables, as they might otherwise be expanded by user macros.
+   There are some unavoidable exceptions within include files to
+   define necessary library symbols; they are noted "INFRINGES ON
+   USER NAME SPACE" below.  */
+
+/* Identify Bison output.  */
+#define YYBISON	1
+
+/* Pure parsers.  */
+#define YYPURE	1
+
+/* Using locations.  */
+#define YYLSP_NEEDED 0
+
+
+
+/* Tokens.  */
+#ifndef YYTOKENTYPE
+# define YYTOKENTYPE
+   /* Put the tokens into the symbol table, so that GDB and other debuggers
+      know about them.  */
+   enum yytokentype {
+     ANCHOR = 258,
+     ALIAS = 259,
+     TRANSFER = 260,
+     ITRANSFER = 261,
+     WORD = 262,
+     PLAIN = 263,
+     BLOCK = 264,
+     DOCSEP = 265,
+     IOPEN = 266,
+     INDENT = 267,
+     IEND = 268
+   };
+#endif
+#define ANCHOR 258
+#define ALIAS 259
+#define TRANSFER 260
+#define ITRANSFER 261
+#define WORD 262
+#define PLAIN 263
+#define BLOCK 264
+#define DOCSEP 265
+#define IOPEN 266
+#define INDENT 267
+#define IEND 268
+
+
+
+
+/* Copy the first part of user declarations.  */
+#line 14 "gram.y"
+
+
+#include "syck.h"
+
+#define YYPARSE_PARAM   parser
+#define YYLEX_PARAM     parser
+
+
+
+/* Enabling traces.  */
+#ifndef YYDEBUG
+# define YYDEBUG 1
+#endif
+
+/* Enabling verbose error messages.  */
+#ifdef YYERROR_VERBOSE
+# undef YYERROR_VERBOSE
+# define YYERROR_VERBOSE 1
+#else
+# define YYERROR_VERBOSE 0
+#endif
+
+#ifndef YYSTYPE
+#line 23 "gram.y"
+typedef union {
+    SYMID nodeId;
+    SyckNode *nodeData;
+    char *name;
+} yystype;
+/* Line 193 of /usr/local/share/bison/yacc.c.  */
+#line 114 "y.tab.c"
+# define YYSTYPE yystype
+# define YYSTYPE_IS_TRIVIAL 1
+#endif
+
+#ifndef YYLTYPE
+typedef struct yyltype
+{
+  int first_line;
+  int first_column;
+  int last_line;
+  int last_column;
+} yyltype;
+# define YYLTYPE yyltype
+# define YYLTYPE_IS_TRIVIAL 1
+#endif
+
+/* Copy the second part of user declarations.  */
+
+
+/* Line 213 of /usr/local/share/bison/yacc.c.  */
+#line 135 "y.tab.c"
+
+#if ! defined (yyoverflow) || YYERROR_VERBOSE
+
+/* The parser invokes alloca or malloc; define the necessary symbols.  */
+
+# if YYSTACK_USE_ALLOCA
+#  define YYSTACK_ALLOC alloca
+# else
+#  ifndef YYSTACK_USE_ALLOCA
+#   if defined (alloca) || defined (_ALLOCA_H)
+#    define YYSTACK_ALLOC alloca
+#   else
+#    ifdef __GNUC__
+#     define YYSTACK_ALLOC __builtin_alloca
+#    endif
+#   endif
+#  endif
+# endif
+
+# ifdef YYSTACK_ALLOC
+   /* Pacify GCC's `empty if-body' warning. */
+#  define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
+# else
+#  if defined (__STDC__) || defined (__cplusplus)
+#   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
+#   define YYSIZE_T size_t
+#  endif
+#  define YYSTACK_ALLOC malloc
+#  define YYSTACK_FREE free
+# endif
+#endif /* ! defined (yyoverflow) || YYERROR_VERBOSE */
+
+
+#if (! defined (yyoverflow) \
+     && (! defined (__cplusplus) \
+	 || (YYLTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
+
+/* A type that is properly aligned for any stack member.  */
+union yyalloc
+{
+  short yyss;
+  YYSTYPE yyvs;
+  };
+
+/* The size of the maximum gap between one aligned stack and the next.  */
+# define YYSTACK_GAP_MAX (sizeof (union yyalloc) - 1)
+
+/* The size of an array large to enough to hold all stacks, each with
+   N elements.  */
+# define YYSTACK_BYTES(N) \
+     ((N) * (sizeof (short) + sizeof (YYSTYPE))				\
+      + YYSTACK_GAP_MAX)
+
+/* Copy COUNT objects from FROM to TO.  The source and destination do
+   not overlap.  */
+# ifndef YYCOPY
+#  if 1 < __GNUC__
+#   define YYCOPY(To, From, Count) \
+      __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
+#  else
+#   define YYCOPY(To, From, Count)		\
+      do					\
+	{					\
+	  register YYSIZE_T yyi;		\
+	  for (yyi = 0; yyi < (Count); yyi++)	\
+	    (To)[yyi] = (From)[yyi];	\
+	}					\
+      while (0)
+#  endif
+# endif
+
+/* Relocate STACK from its old location to the new one.  The
+   local variables YYSIZE and YYSTACKSIZE give the old and new number of
+   elements in the stack, and YYPTR gives the new location of the
+   stack.  Advance YYPTR to a properly aligned location for the next
+   stack.  */
+# define YYSTACK_RELOCATE(Stack)					\
+    do									\
+      {									\
+	YYSIZE_T yynewbytes;						\
+	YYCOPY (&yyptr->Stack, Stack, yysize);				\
+	Stack = &yyptr->Stack;						\
+	yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAX;	\
+	yyptr += yynewbytes / sizeof (*yyptr);				\
+      }									\
+    while (0)
+
+#endif
+
+#if defined (__STDC__) || defined (__cplusplus)
+   typedef signed char yysigned_char;
+#else
+   typedef short yysigned_char;
+#endif
+
+/* YYFINAL -- State number of the termination state. */
+#define YYFINAL  32
+#define YYLAST   132
+
+/* YYNTOKENS -- Number of terminals. */
+#define YYNTOKENS  23
+/* YYNNTS -- Number of nonterminals. */
+#define YYNNTS  21
+/* YYNRULES -- Number of rules. */
+#define YYNRULES  46
+/* YYNRULES -- Number of states. */
+#define YYNSTATES  73
+
+/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
+#define YYUNDEFTOK  2
+#define YYMAXUTOK   268
+
+#define YYTRANSLATE(X) \
+  ((unsigned)(X) <= YYMAXUTOK ? yytranslate[X] : YYUNDEFTOK)
+
+/* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX.  */
+static const unsigned char yytranslate[] =
+{
+       0,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,    16,    21,    14,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,    15,     2,
+       2,     2,     2,    22,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,    17,     2,    18,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,    19,     2,    20,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     1,     2,     3,     4,
+       5,     6,     7,     8,     9,    10,    11,    12,    13
+};
+
+#if YYDEBUG
+/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
+   YYRHS.  */
+static const unsigned char yyprhs[] =
+{
+       0,     0,     3,     5,     8,     9,    11,    13,    16,    18,
+      22,    24,    25,    27,    30,    32,    34,    37,    40,    42,
+      44,    47,    49,    51,    53,    55,    57,    61,    64,    66,
+      70,    73,    77,    80,    82,    86,    90,    94,    96,   102,
+     104,   108,   111,   115,   119,   122,   124
+};
+
+/* YYRHS -- A `-1'-separated list of the rules' RHS. */
+static const yysigned_char yyrhs[] =
+{
+      24,     0,    -1,    31,    -1,    10,    25,    -1,    -1,    30,
+      -1,    31,    -1,     3,    25,    -1,     4,    -1,    27,    25,
+      28,    -1,    25,    -1,    -1,    11,    -1,    27,    12,    -1,
+      13,    -1,    12,    -1,     5,    30,    -1,     6,    30,    -1,
+       7,    -1,     8,    -1,     5,    31,    -1,     9,    -1,    32,
+      -1,    35,    -1,    37,    -1,    42,    -1,    27,    34,    28,
+      -1,    14,    26,    -1,    33,    -1,    34,    29,    33,    -1,
+      34,    29,    -1,    17,    36,    18,    -1,    17,    18,    -1,
+      25,    -1,    36,    21,    25,    -1,    27,    40,    28,    -1,
+      30,    15,    26,    -1,    38,    -1,    22,    25,    29,    15,
+      26,    -1,    39,    -1,    40,    29,    39,    -1,    40,    29,
+      -1,    25,    15,    26,    -1,    19,    43,    20,    -1,    19,
+      20,    -1,    41,    -1,    43,    21,    41,    -1
+};
+
+/* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
+static const unsigned short yyrline[] =
+{
+       0,    44,    44,    48,    52,    58,    59,    60,    69,    77,
+      83,    84,   102,   103,   106,   109,   117,   122,   130,   143,
+     150,   155,   156,   157,   158,   159,   165,   171,   177,   181,
+     186,   195,   199,   205,   209,   219,   225,   240,   241,   249,
+     250,   255,   264,   272,   276,   282,   283
+};
+#endif
+
+#if YYDEBUG || YYERROR_VERBOSE
+/* YYTNME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
+   First, the terminals, then, starting at YYNTOKENS, nonterminals. */
+static const char *const yytname[] =
+{
+  "$end", "error", "$undefined", "ANCHOR", "ALIAS", "TRANSFER", "ITRANSFER", 
+  "WORD", "PLAIN", "BLOCK", "DOCSEP", "IOPEN", "INDENT", "IEND", "'-'", 
+  "':'", "'+'", "'['", "']'", "'{'", "'}'", "','", "'?'", "$accept", 
+  "doc", "atom", "atom_or_empty", "indent_open", "indent_end", 
+  "indent_sep", "word_rep", "struct_rep", "implicit_seq", "basic_seq", 
+  "in_implicit_seq", "inline_seq", "in_inline_seq", "implicit_map", 
+  "basic_mapping", "complex_mapping", "in_implicit_map", "basic_mapping2", 
+  "inline_map", "in_inline_map", 0
+};
+#endif
+
+# ifdef YYPRINT
+/* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to
+   token YYLEX-NUM.  */
+static const unsigned short yytoknum[] =
+{
+       0,   256,   257,   258,   259,   260,   261,   262,   263,   264,
+     265,   266,   267,   268,    45,    58,    43,    91,    93,   123,
+     125,    44,    63
+};
+# endif
+
+/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
+static const unsigned char yyr1[] =
+{
+       0,    23,    24,    24,    24,    25,    25,    25,    25,    25,
+      26,    26,    27,    27,    28,    29,    30,    30,    30,    30,
+      31,    31,    31,    31,    31,    31,    32,    33,    34,    34,
+      34,    35,    35,    36,    36,    37,    38,    39,    39,    40,
+      40,    40,    41,    42,    42,    43,    43
+};
+
+/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
+static const unsigned char yyr2[] =
+{
+       0,     2,     1,     2,     0,     1,     1,     2,     1,     3,
+       1,     0,     1,     2,     1,     1,     2,     2,     1,     1,
+       2,     1,     1,     1,     1,     1,     3,     2,     1,     3,
+       2,     3,     2,     1,     3,     3,     3,     1,     5,     1,
+       3,     2,     3,     3,     2,     1,     3
+};
+
+/* 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 unsigned char yydefact[] =
+{
+       4,     0,    21,     0,    12,     0,     0,     0,     0,     2,
+      22,    23,    24,    25,    20,     0,     8,     0,     0,    18,
+      19,     3,     0,     5,     6,    32,    33,     0,    44,     0,
+      45,     0,     1,     0,    13,    11,     0,     0,    28,     0,
+      37,    39,     0,     7,    16,    17,     0,     5,    31,     0,
+      11,    43,     0,    10,    27,     0,    11,    15,    14,    26,
+      30,    35,    41,     9,    34,    42,    46,     0,    36,    29,
+      40,    11,    38
+};
+
+/* YYDEFGOTO[NTERM-NUM]. */
+static const yysigned_char yydefgoto[] =
+{
+      -1,     7,    53,    54,    22,    59,    60,    23,    24,    10,
+      38,    39,    11,    27,    12,    40,    41,    42,    30,    13,
+      31
+};
+
+/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
+   STATE-NUM.  */
+#define YYPACT_NINF -49
+static const yysigned_char yypact[] =
+{
+       7,   113,   -49,    97,   -49,    80,    52,    15,    68,   -49,
+     -49,   -49,   -49,   -49,   -49,    97,   -49,   104,    88,   -49,
+     -49,   -49,    24,   -49,   -49,   -49,   -49,    19,   -49,     4,
+     -49,    28,   -49,    88,   -49,    97,    97,     6,   -49,    32,
+     -49,   -49,    32,   -49,   -49,   -49,    26,     6,   -49,    97,
+      97,   -49,    97,   -49,   -49,    30,    97,   -49,   -49,   -49,
+      39,   -49,    59,   -49,   -49,   -49,   -49,    47,   -49,   -49,
+     -49,    97,   -49
+};
+
+/* YYPGOTO[NTERM-NUM].  */
+static const yysigned_char yypgoto[] =
+{
+     -49,   -49,    -2,   -48,     5,   -35,    37,    -8,    51,   -49,
+      10,   -49,   -49,   -49,   -49,   -49,    16,   -49,    25,   -49,
+     -49
+};
+
+/* 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, parse error.  */
+#define YYTABLE_NINF -1
+static const unsigned char yytable[] =
+{
+      37,    21,    65,    26,    29,     8,     8,    61,    68,    44,
+      45,    63,     1,    43,    47,    32,     2,     3,     4,    50,
+      46,    56,     8,    72,     5,    44,     6,    15,    16,    17,
+      18,    19,    20,     2,    55,     4,    34,    48,    35,    58,
+      49,     5,    57,     6,    57,    58,    36,    64,    51,    52,
+      29,     9,    14,    35,    37,    15,    16,    17,    18,    19,
+      20,     2,    71,     4,    33,    18,    19,    20,    14,     5,
+      69,     6,    28,    33,    18,    19,    20,    66,    70,    62,
+      34,    36,    35,    15,    16,    17,    18,    19,    20,     2,
+      36,     4,    67,    33,    18,    19,    20,     5,    25,     6,
+      15,    16,    17,    18,    19,    20,     2,     0,     4,    17,
+      18,    19,    20,     2,     5,     4,     6,     0,     1,     0,
+       0,     5,     2,     6,     4,     0,     0,     0,     0,     0,
+       5,     0,     6
+};
+
+static const yysigned_char yycheck[] =
+{
+       8,     3,    50,     5,     6,     0,     1,    42,    56,    17,
+      18,    46,     5,    15,    22,     0,     9,    10,    11,    15,
+      22,    15,    17,    71,    17,    33,    19,     3,     4,     5,
+       6,     7,     8,     9,    36,    11,    12,    18,    14,    13,
+      21,    17,    12,    19,    12,    13,    22,    49,    20,    21,
+      52,     0,     1,    14,    62,     3,     4,     5,     6,     7,
+       8,     9,    15,    11,     5,     6,     7,     8,    17,    17,
+      60,    19,    20,     5,     6,     7,     8,    52,    62,    42,
+      12,    22,    14,     3,     4,     5,     6,     7,     8,     9,
+      22,    11,    55,     5,     6,     7,     8,    17,    18,    19,
+       3,     4,     5,     6,     7,     8,     9,    -1,    11,     5,
+       6,     7,     8,     9,    17,    11,    19,    -1,     5,    -1,
+      -1,    17,     9,    19,    11,    -1,    -1,    -1,    -1,    -1,
+      17,    -1,    19
+};
+
+/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
+   symbol of state STATE-NUM.  */
+static const unsigned char yystos[] =
+{
+       0,     5,     9,    10,    11,    17,    19,    24,    27,    31,
+      32,    35,    37,    42,    31,     3,     4,     5,     6,     7,
+       8,    25,    27,    30,    31,    18,    25,    36,    20,    25,
+      41,    43,     0,     5,    12,    14,    22,    30,    33,    34,
+      38,    39,    40,    25,    30,    30,    25,    30,    18,    21,
+      15,    20,    21,    25,    26,    25,    15,    12,    13,    28,
+      29,    28,    29,    28,    25,    26,    41,    29,    26,    33,
+      39,    15,    26
+};
+
+#if ! defined (YYSIZE_T) && defined (__SIZE_TYPE__)
+# define YYSIZE_T __SIZE_TYPE__
+#endif
+#if ! defined (YYSIZE_T) && defined (size_t)
+# define YYSIZE_T size_t
+#endif
+#if ! defined (YYSIZE_T)
+# if defined (__STDC__) || defined (__cplusplus)
+#  include <stddef.h> /* INFRINGES ON USER NAME SPACE */
+#  define YYSIZE_T size_t
+# endif
+#endif
+#if ! defined (YYSIZE_T)
+# define YYSIZE_T unsigned int
+#endif
+
+#define yyerrok		(yyerrstatus = 0)
+#define yyclearin	(yychar = YYEMPTY)
+#define YYEMPTY		-2
+#define YYEOF		0
+
+#define YYACCEPT	goto yyacceptlab
+#define YYABORT		goto yyabortlab
+#define YYERROR		goto yyerrlab1
+
+/* 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.  */
+
+#define YYFAIL		goto yyerrlab
+
+#define YYRECOVERING()  (!!yyerrstatus)
+
+#define YYBACKUP(Token, Value)					\
+do								\
+  if (yychar == YYEMPTY && yylen == 1)				\
+    {								\
+      yychar = (Token);						\
+      yylval = (Value);						\
+      yychar1 = YYTRANSLATE (yychar);				\
+      YYPOPSTACK;						\
+      goto yybackup;						\
+    }								\
+  else								\
+    { 								\
+      yyerror ("syntax error: cannot back up");			\
+      YYERROR;							\
+    }								\
+while (0)
+
+#define YYTERROR	1
+#define YYERRCODE	256
+
+/* YYLLOC_DEFAULT -- Compute the default location (before the actions
+   are run).  */
+
+#ifndef YYLLOC_DEFAULT
+# define YYLLOC_DEFAULT(Current, Rhs, N)           \
+  Current.first_line   = Rhs[1].first_line;      \
+  Current.first_column = Rhs[1].first_column;    \
+  Current.last_line    = Rhs[N].last_line;       \
+  Current.last_column  = Rhs[N].last_column;
+#endif
+
+/* YYLEX -- calling `yylex' with the right arguments.  */
+
+#ifdef YYLEX_PARAM
+# define YYLEX	yylex (&yylval, YYLEX_PARAM)
+#else
+# define YYLEX	yylex (&yylval)
+#endif
+
+/* Enable debugging if requested.  */
+#if YYDEBUG
+
+# ifndef YYFPRINTF
+#  include <stdio.h> /* INFRINGES ON USER NAME SPACE */
+#  define YYFPRINTF fprintf
+# endif
+
+# define YYDPRINTF(Args)			\
+do {						\
+  if (yydebug)					\
+    YYFPRINTF Args;				\
+} while (0)
+# define YYDSYMPRINT(Args)			\
+do {						\
+  if (yydebug)					\
+    yysymprint Args;				\
+} while (0)
+/* Nonzero means print parse trace.  It is left uninitialized so that
+   multiple parsers can coexist.  */
+int yydebug;
+#else /* !YYDEBUG */
+# define YYDPRINTF(Args)
+# define YYDSYMPRINT(Args)
+#endif /* !YYDEBUG */
+
+/* YYINITDEPTH -- initial size of the parser's stacks.  */
+#ifndef	YYINITDEPTH
+# define YYINITDEPTH 200
+#endif
+
+/* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
+   if the built-in stack extension method is used).
+
+   Do not make this value too large; the results are undefined if
+   SIZE_MAX < YYSTACK_BYTES (YYMAXDEPTH)
+   evaluated with infinite-precision integer arithmetic.  */
+
+#if YYMAXDEPTH == 0
+# undef YYMAXDEPTH
+#endif
+
+#ifndef YYMAXDEPTH
+# define YYMAXDEPTH 10000
+#endif
+
+
+
+#if YYERROR_VERBOSE
+
+# ifndef yystrlen
+#  if defined (__GLIBC__) && defined (_STRING_H)
+#   define yystrlen strlen
+#  else
+/* Return the length of YYSTR.  */
+static YYSIZE_T
+#   if defined (__STDC__) || defined (__cplusplus)
+yystrlen (const char *yystr)
+#   else
+yystrlen (yystr)
+     const char *yystr;
+#   endif
+{
+  register const char *yys = yystr;
+
+  while (*yys++ != '\0')
+    continue;
+
+  return yys - yystr - 1;
+}
+#  endif
+# endif
+
+# ifndef yystpcpy
+#  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 defined (__STDC__) || defined (__cplusplus)
+yystpcpy (char *yydest, const char *yysrc)
+#   else
+yystpcpy (yydest, yysrc)
+     char *yydest;
+     const char *yysrc;
+#   endif
+{
+  register char *yyd = yydest;
+  register const char *yys = yysrc;
+
+  while ((*yyd++ = *yys++) != '\0')
+    continue;
+
+  return yyd - 1;
+}
+#  endif
+# endif
+
+#endif /* !YYERROR_VERBOSE */
+
+
+
+#if YYDEBUG
+/*-----------------------------.
+| Print this symbol on YYOUT.  |
+`-----------------------------*/
+
+static void
+#if defined (__STDC__) || defined (__cplusplus)
+yysymprint (FILE* yyout, int yytype, YYSTYPE yyvalue)
+#else
+yysymprint (yyout, yytype, yyvalue)
+    FILE* yyout;
+    int yytype;
+    YYSTYPE yyvalue;
+#endif
+{
+  /* Pacify ``unused variable'' warnings.  */
+  (void) yyvalue;
+
+  if (yytype < YYNTOKENS)
+    {
+      YYFPRINTF (yyout, "token %s (", yytname[yytype]);
+# ifdef YYPRINT
+      YYPRINT (yyout, yytoknum[yytype], yyvalue);
+# endif
+    }
+  else
+    YYFPRINTF (yyout, "nterm %s (", yytname[yytype]);
+
+  switch (yytype)
+    {
+      default:
+        break;
+    }
+  YYFPRINTF (yyout, ")");
+}
+#endif /* YYDEBUG. */
+
+
+/*-----------------------------------------------.
+| Release the memory associated to this symbol.  |
+`-----------------------------------------------*/
+
+static void
+#if defined (__STDC__) || defined (__cplusplus)
+yydestruct (int yytype, YYSTYPE yyvalue)
+#else
+yydestruct (yytype, yyvalue)
+    int yytype;
+    YYSTYPE yyvalue;
+#endif
+{
+  /* Pacify ``unused variable'' warnings.  */
+  (void) yyvalue;
+
+  switch (yytype)
+    {
+      default:
+        break;
+    }
+}
+
+
+
+/* The user can define YYPARSE_PARAM as the name of an argument to be passed
+   into yyparse.  The argument should have type void *.
+   It should actually point to an object.
+   Grammar actions can access the variable by casting it
+   to the proper pointer type.  */
+
+#ifdef YYPARSE_PARAM
+# if defined (__STDC__) || defined (__cplusplus)
+#  define YYPARSE_PARAM_ARG void *YYPARSE_PARAM
+#  define YYPARSE_PARAM_DECL
+# else
+#  define YYPARSE_PARAM_ARG YYPARSE_PARAM
+#  define YYPARSE_PARAM_DECL void *YYPARSE_PARAM;
+# endif
+#else /* !YYPARSE_PARAM */
+# define YYPARSE_PARAM_ARG
+# define YYPARSE_PARAM_DECL
+#endif /* !YYPARSE_PARAM */
+
+/* Prevent warning if -Wstrict-prototypes.  */
+#ifdef __GNUC__
+# ifdef YYPARSE_PARAM
+int yyparse (void *);
+# else
+int yyparse (void);
+# endif
+#endif
+
+
+
+
+int
+yyparse (YYPARSE_PARAM_ARG)
+     YYPARSE_PARAM_DECL
+{
+  /* The lookahead symbol.  */
+int yychar;
+
+/* The semantic value of the lookahead symbol.  */
+YYSTYPE yylval;
+
+/* Number of parse errors so far.  */
+int yynerrs;
+
+  register int yystate;
+  register int yyn;
+  int yyresult;
+  /* Number of tokens to shift before error messages enabled.  */
+  int yyerrstatus;
+  /* Lookahead token as an internal (translated) token number.  */
+  int yychar1 = 0;
+
+  /* Three stacks and their tools:
+     `yyss': related to states,
+     `yyvs': related to semantic values,
+     `yyls': related to locations.
+
+     Refer to the stacks thru separate pointers, to allow yyoverflow
+     to reallocate them elsewhere.  */
+
+  /* The state stack.  */
+  short	yyssa[YYINITDEPTH];
+  short *yyss = yyssa;
+  register short *yyssp;
+
+  /* The semantic value stack.  */
+  YYSTYPE yyvsa[YYINITDEPTH];
+  YYSTYPE *yyvs = yyvsa;
+  register YYSTYPE *yyvsp;
+
+
+
+#define YYPOPSTACK   (yyvsp--, yyssp--)
+
+  YYSIZE_T yystacksize = YYINITDEPTH;
+
+  /* The variables used to return semantic value and location from the
+     action routines.  */
+  YYSTYPE yyval;
+
+
+  /* When reducing, the number of symbols on the RHS of the reduced
+     rule.  */
+  int yylen;
+
+  YYDPRINTF ((stderr, "Starting parse\n"));
+
+  yystate = 0;
+  yyerrstatus = 0;
+  yynerrs = 0;
+  yychar = YYEMPTY;		/* Cause a token to be read.  */
+
+  /* Initialize stack pointers.
+     Waste one element of value and location stack
+     so that they stay on the same level as the state stack.
+     The wasted elements are never initialized.  */
+
+  yyssp = yyss;
+  yyvsp = yyvs;
+
+  goto yysetstate;
+
+/*------------------------------------------------------------.
+| yynewstate -- Push a new state, which is found in yystate.  |
+`------------------------------------------------------------*/
+ 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.
+     */
+  yyssp++;
+
+ yysetstate:
+  *yyssp = yystate;
+
+  if (yyssp >= yyss + yystacksize - 1)
+    {
+      /* Get the current used size of the three stacks, in elements.  */
+      YYSIZE_T yysize = yyssp - yyss + 1;
+
+#ifdef yyoverflow
+      {
+	/* 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 *yyss1 = yyss;
+
+
+	/* Each stack pointer address is followed by the size of the
+	   data in use in that stack, in bytes.  This used to be a
+	   conditional around just the two extra args, but that might
+	   be undefined if yyoverflow is a macro.  */
+	yyoverflow ("parser stack overflow",
+		    &yyss1, yysize * sizeof (*yyssp),
+		    &yyvs1, yysize * sizeof (*yyvsp),
+
+		    &yystacksize);
+
+	yyss = yyss1;
+	yyvs = yyvs1;
+      }
+#else /* no yyoverflow */
+# ifndef YYSTACK_RELOCATE
+      goto yyoverflowlab;
+# else
+      /* Extend the stack our own way.  */
+      if (yystacksize >= YYMAXDEPTH)
+	goto yyoverflowlab;
+      yystacksize *= 2;
+      if (yystacksize > YYMAXDEPTH)
+	yystacksize = YYMAXDEPTH;
+
+      {
+	short *yyss1 = yyss;
+	union yyalloc *yyptr =
+	  (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
+	if (! yyptr)
+	  goto yyoverflowlab;
+	YYSTACK_RELOCATE (yyss);
+	YYSTACK_RELOCATE (yyvs);
+
+#  undef YYSTACK_RELOCATE
+	if (yyss1 != yyssa)
+	  YYSTACK_FREE (yyss1);
+      }
+# endif
+#endif /* no yyoverflow */
+
+      yyssp = yyss + yysize - 1;
+      yyvsp = yyvs + yysize - 1;
+
+
+      YYDPRINTF ((stderr, "Stack size increased to %lu\n",
+		  (unsigned long int) yystacksize));
+
+      if (yyssp >= yyss + yystacksize - 1)
+	YYABORT;
+    }
+
+  YYDPRINTF ((stderr, "Entering state %d\n", yystate));
+
+  goto yybackup;
+
+/*-----------.
+| yybackup.  |
+`-----------*/
+yybackup:
+
+/* Do appropriate processing given the current state.  */
+/* Read a lookahead token if we need one and don't already have one.  */
+/* yyresume: */
+
+  /* First try to decide what to do without reference to lookahead token.  */
+
+  yyn = yypact[yystate];
+  if (yyn == YYPACT_NINF)
+    goto yydefault;
+
+  /* Not known => get a lookahead token if don't already have one.  */
+
+  /* yychar is either YYEMPTY or YYEOF
+     or a valid token in external form.  */
+
+  if (yychar == YYEMPTY)
+    {
+      YYDPRINTF ((stderr, "Reading a token: "));
+      yychar = YYLEX;
+    }
+
+  /* Convert token to internal form (in yychar1) for indexing tables with.  */
+
+  if (yychar <= 0)		/* This means end of input.  */
+    {
+      yychar1 = 0;
+      yychar = YYEOF;		/* Don't call YYLEX any more.  */
+
+      YYDPRINTF ((stderr, "Now at end of input.\n"));
+    }
+  else
+    {
+      yychar1 = YYTRANSLATE (yychar);
+
+      /* We have to keep this `#if YYDEBUG', since we use variables
+	 which are defined only if `YYDEBUG' is set.  */
+      YYDPRINTF ((stderr, "Next token is "));
+      YYDSYMPRINT ((stderr, yychar1, yylval));
+      YYDPRINTF ((stderr, "\n"));
+    }
+
+  /* If the proper action on seeing token YYCHAR1 is to reduce or to
+     detect an error, take that action.  */
+  yyn += yychar1;
+  if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yychar1)
+    goto yydefault;
+  yyn = yytable[yyn];
+  if (yyn <= 0)
+    {
+      if (yyn == 0 || yyn == YYTABLE_NINF)
+	goto yyerrlab;
+      yyn = -yyn;
+      goto yyreduce;
+    }
+
+  if (yyn == YYFINAL)
+    YYACCEPT;
+
+  /* Shift the lookahead token.  */
+  YYDPRINTF ((stderr, "Shifting token %d (%s), ",
+	      yychar, yytname[yychar1]));
+
+  /* Discard the token being shifted unless it is eof.  */
+  if (yychar != YYEOF)
+    yychar = YYEMPTY;
+
+  *++yyvsp = yylval;
+
+
+  /* Count tokens shifted since error; after three, turn off error
+     status.  */
+  if (yyerrstatus)
+    yyerrstatus--;
+
+  yystate = yyn;
+  goto yynewstate;
+
+
+/*-----------------------------------------------------------.
+| yydefault -- do the default action for the current state.  |
+`-----------------------------------------------------------*/
+yydefault:
+  yyn = yydefact[yystate];
+  if (yyn == 0)
+    goto yyerrlab;
+  goto yyreduce;
+
+
+/*-----------------------------.
+| yyreduce -- Do a reduction.  |
+`-----------------------------*/
+yyreduce:
+  /* yyn is the number of a rule to reduce with.  */
+  yylen = yyr2[yyn];
+
+  /* If YYLEN is nonzero, implement the default value of the action:
+     `$$ = $1'.
+
+     Otherwise, the following line sets YYVAL to garbage.
+     This behavior is undocumented and Bison
+     users should not rely upon it.  Assigning to YYVAL
+     unconditionally makes the parser a bit smaller, and it avoids a
+     GCC warning that YYVAL may be used uninitialized.  */
+  yyval = yyvsp[1-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 via rule %d (line %d), ",
+		 yyn - 1, yyrline[yyn]);
+
+      /* Print the symbols being reduced, and their result.  */
+      for (yyi = yyprhs[yyn]; yyrhs[yyi] >= 0; yyi++)
+	YYFPRINTF (stderr, "%s ", yytname[yyrhs[yyi]]);
+      YYFPRINTF (stderr, " -> %s\n", yytname[yyr1[yyn]]);
+    }
+#endif
+  switch (yyn)
+    {
+        case 2:
+#line 45 "gram.y"
+    {
+           ((SyckParser *)parser)->root = syck_hdlr_add_node( (SyckParser *)parser, yyvsp[0].nodeData );
+        }
+    break;
+
+  case 3:
+#line 49 "gram.y"
+    {
+           ((SyckParser *)parser)->root = syck_hdlr_add_node( (SyckParser *)parser, yyvsp[0].nodeData );
+        }
+    break;
+
+  case 4:
+#line 53 "gram.y"
+    {
+           ((SyckParser *)parser)->eof = 1;
+        }
+    break;
+
+  case 7:
+#line 61 "gram.y"
+    { 
+           /*
+            * _Anchors_: The language binding must keep a separate symbol table
+            * for anchors.  The actual ID in the symbol table is returned to the
+            * higher nodes, though.
+            */
+           yyval.nodeData = syck_hdlr_add_anchor( (SyckParser *)parser, yyvsp[-1].name, yyvsp[0].nodeData );
+        }
+    break;
+
+  case 8:
+#line 70 "gram.y"
+    {
+           /*
+            * _Aliases_: The anchor symbol table is scanned for the anchor name.
+            * The anchor's ID in the language's symbol table is returned.
+            */
+           yyval.nodeData = syck_hdlr_add_alias( (SyckParser *)parser, yyvsp[0].name );
+        }
+    break;
+
+  case 9:
+#line 78 "gram.y"
+    {
+           yyval.nodeData = yyvsp[-1].nodeData;
+        }
+    break;
+
+  case 11:
+#line 85 "gram.y"
+    {
+                   SyckNode *n = syck_new_str( "" ); 
+                   if ( ((SyckParser *)parser)->taguri_expansion == 1 )
+                   {
+                       syck_taguri( n, "yaml.org,2002", "null", 4 );
+                   }
+                   else
+                   {
+                       n->type_id = syck_strndup( "null", 4 );
+                   }
+                   yyval.nodeData = n;
+                }
+    break;
+
+  case 16:
+#line 118 "gram.y"
+    { 
+               syck_add_transfer( yyvsp[-1].name, yyvsp[0].nodeData, ((SyckParser *)parser)->taguri_expansion );
+               yyval.nodeData = yyvsp[0].nodeData;
+            }
+    break;
+
+  case 17:
+#line 123 "gram.y"
+    { 
+               if ( ((SyckParser *)parser)->implicit_typing == 1 )
+               {
+                  try_tag_implicit( yyvsp[0].nodeData, ((SyckParser *)parser)->taguri_expansion );
+               }
+               yyval.nodeData = yyvsp[0].nodeData;
+            }
+    break;
+
+  case 18:
+#line 131 "gram.y"
+    { 
+               SyckNode *n = yyvsp[0].nodeData;
+               if ( ((SyckParser *)parser)->taguri_expansion == 1 )
+               {
+                   syck_taguri( n, "yaml.org,2002", "str", 3 );
+               }
+               else
+               {
+                   n->type_id = syck_strndup( "str", 3 );
+               }
+               yyval.nodeData = n;
+            }
+    break;
+
+  case 20:
+#line 151 "gram.y"
+    { 
+                syck_add_transfer( yyvsp[-1].name, yyvsp[0].nodeData, ((SyckParser *)parser)->taguri_expansion );
+                yyval.nodeData = yyvsp[0].nodeData;
+            }
+    break;
+
+  case 26:
+#line 166 "gram.y"
+    { 
+                    yyval.nodeData = yyvsp[-1].nodeData;
+                }
+    break;
+
+  case 27:
+#line 172 "gram.y"
+    { 
+                    yyval.nodeId = syck_hdlr_add_node( (SyckParser *)parser, yyvsp[0].nodeData );
+                }
+    break;
+
+  case 28:
+#line 178 "gram.y"
+    {
+                    yyval.nodeData = syck_new_seq( yyvsp[0].nodeId );
+                }
+    break;
+
+  case 29:
+#line 182 "gram.y"
+    { 
+                    syck_seq_add( yyvsp[-2].nodeData, yyvsp[0].nodeId );
+                    yyval.nodeData = yyvsp[-2].nodeData;
+				}
+    break;
+
+  case 30:
+#line 187 "gram.y"
+    { 
+                    yyval.nodeData = yyvsp[-1].nodeData;
+				}
+    break;
+
+  case 31:
+#line 196 "gram.y"
+    { 
+                    yyval.nodeData = yyvsp[-1].nodeData;
+                }
+    break;
+
+  case 32:
+#line 200 "gram.y"
+    { 
+                    yyval.nodeData = syck_alloc_seq();
+                }
+    break;
+
+  case 33:
+#line 206 "gram.y"
+    {
+                    yyval.nodeData = syck_new_seq( syck_hdlr_add_node( (SyckParser *)parser, yyvsp[0].nodeData ) );
+                }
+    break;
+
+  case 34:
+#line 210 "gram.y"
+    { 
+                    syck_seq_add( yyvsp[-2].nodeData, syck_hdlr_add_node( (SyckParser *)parser, yyvsp[0].nodeData ) );
+                    yyval.nodeData = yyvsp[-2].nodeData;
+				}
+    break;
+
+  case 35:
+#line 220 "gram.y"
+    { 
+                    yyval.nodeData = yyvsp[-1].nodeData;
+                }
+    break;
+
+  case 36:
+#line 226 "gram.y"
+    {
+                    yyval.nodeData = syck_new_map( 
+                        syck_hdlr_add_node( (SyckParser *)parser, yyvsp[-2].nodeData ), 
+                        syck_hdlr_add_node( (SyckParser *)parser, yyvsp[0].nodeData ) );
+                }
+    break;
+
+  case 38:
+#line 242 "gram.y"
+    {
+                    yyval.nodeData = syck_new_map( 
+                        syck_hdlr_add_node( (SyckParser *)parser, yyvsp[-3].nodeData ), 
+                        syck_hdlr_add_node( (SyckParser *)parser, yyvsp[0].nodeData ) );
+                }
+    break;
+
+  case 40:
+#line 251 "gram.y"
+    { 
+                    syck_map_update( yyvsp[-2].nodeData, yyvsp[0].nodeData );
+                    yyval.nodeData = yyvsp[-2].nodeData;
+                }
+    break;
+
+  case 41:
+#line 256 "gram.y"
+    { 
+                    yyval.nodeData = yyvsp[-1].nodeData;
+                }
+    break;
+
+  case 42:
+#line 265 "gram.y"
+    {
+                    yyval.nodeData = syck_new_map( 
+                        syck_hdlr_add_node( (SyckParser *)parser, yyvsp[-2].nodeData ), 
+                        syck_hdlr_add_node( (SyckParser *)parser, yyvsp[0].nodeData ) );
+                }
+    break;
+
+  case 43:
+#line 273 "gram.y"
+    {
+                    yyval.nodeData = yyvsp[-1].nodeData;
+                }
+    break;
+
+  case 44:
+#line 277 "gram.y"
+    {
+                    yyval.nodeData = syck_alloc_map();
+                }
+    break;
+
+  case 46:
+#line 284 "gram.y"
+    {
+                    syck_map_update( yyvsp[-2].nodeData, yyvsp[0].nodeData );
+                    yyval.nodeData = yyvsp[-2].nodeData;
+				}
+    break;
+
+
+    }
+
+/* Line 1016 of /usr/local/share/bison/yacc.c.  */
+#line 1273 "y.tab.c"
+
+  yyvsp -= yylen;
+  yyssp -= 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
+
+  *++yyvsp = yyval;
+
+
+  /* Now `shift' the result of the reduction.  Determine what state
+     that goes to, based on the state we popped back to and the rule
+     number reduced by.  */
+
+  yyn = yyr1[yyn];
+
+  yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
+  if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
+    yystate = yytable[yystate];
+  else
+    yystate = yydefgoto[yyn - YYNTOKENS];
+
+  goto yynewstate;
+
+
+/*------------------------------------.
+| yyerrlab -- here on detecting error |
+`------------------------------------*/
+yyerrlab:
+  /* If not already recovering from an error, report this error.  */
+  if (!yyerrstatus)
+    {
+      ++yynerrs;
+#if YYERROR_VERBOSE
+      yyn = yypact[yystate];
+
+      if (YYPACT_NINF < yyn && yyn < YYLAST)
+	{
+	  YYSIZE_T yysize = 0;
+	  int yytype = YYTRANSLATE (yychar);
+	  char *yymsg;
+	  int yyx, yycount;
+
+	  yycount = 0;
+	  /* Start YYX at -YYN if negative to avoid negative indexes in
+	     YYCHECK.  */
+	  for (yyx = yyn < 0 ? -yyn : 0;
+	       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 (yytname[yytype]);
+	  yymsg = (char *) YYSTACK_ALLOC (yysize);
+	  if (yymsg != 0)
+	    {
+	      char *yyp = yystpcpy (yymsg, "parse error, unexpected ");
+	      yyp = yystpcpy (yyp, yytname[yytype]);
+
+	      if (yycount < 5)
+		{
+		  yycount = 0;
+		  for (yyx = yyn < 0 ? -yyn : 0;
+		       yyx < (int) (sizeof (yytname) / sizeof (char *));
+		       yyx++)
+		    if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
+		      {
+			const char *yyq = ! yycount ? ", expecting " : " or ";
+			yyp = yystpcpy (yyp, yyq);
+			yyp = yystpcpy (yyp, yytname[yyx]);
+			yycount++;
+		      }
+		}
+	      yyerror (yymsg);
+	      YYSTACK_FREE (yymsg);
+	    }
+	  else
+	    yyerror ("parse error; also virtual memory exhausted");
+	}
+      else
+#endif /* YYERROR_VERBOSE */
+	yyerror ("parse error");
+    }
+  goto yyerrlab1;
+
+
+/*----------------------------------------------------.
+| 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 (yychar == YYEOF)
+        {
+	  /* Pop the error token.  */
+          YYPOPSTACK;
+	  /* Pop the rest of the stack.  */
+	  while (yyssp > yyss)
+	    {
+	      YYDPRINTF ((stderr, "Error: popping "));
+	      YYDSYMPRINT ((stderr,
+			    yystos[*yyssp],
+			    *yyvsp));
+	      YYDPRINTF ((stderr, "\n"));
+	      yydestruct (yystos[*yyssp], *yyvsp);
+	      YYPOPSTACK;
+	    }
+	  YYABORT;
+        }
+
+      YYDPRINTF ((stderr, "Discarding token %d (%s).\n",
+		  yychar, yytname[yychar1]));
+      yydestruct (yychar1, yylval);
+      yychar = YYEMPTY;
+    }
+
+  /* Else will try to reuse lookahead token after shifting the error
+     token.  */
+
+  yyerrstatus = 3;	/* Each real token shifted decrements this.  */
+
+  for (;;)
+    {
+      yyn = yypact[yystate];
+      if (yyn != YYPACT_NINF)
+	{
+	  yyn += YYTERROR;
+	  if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
+	    {
+	      yyn = yytable[yyn];
+	      if (0 < yyn)
+		break;
+	    }
+	}
+
+      /* Pop the current state because it cannot handle the error token.  */
+      if (yyssp == yyss)
+	YYABORT;
+
+      YYDPRINTF ((stderr, "Error: popping "));
+      YYDSYMPRINT ((stderr,
+		    yystos[*yyssp], *yyvsp));
+      YYDPRINTF ((stderr, "\n"));
+
+      yydestruct (yystos[yystate], *yyvsp);
+      yyvsp--;
+      yystate = *--yyssp;
+
+
+#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
+    }
+
+  if (yyn == YYFINAL)
+    YYACCEPT;
+
+  YYDPRINTF ((stderr, "Shifting error token, "));
+
+  *++yyvsp = yylval;
+
+
+  yystate = yyn;
+  goto yynewstate;
+
+
+/*-------------------------------------.
+| yyacceptlab -- YYACCEPT comes here.  |
+`-------------------------------------*/
+yyacceptlab:
+  yyresult = 0;
+  goto yyreturn;
+
+/*-----------------------------------.
+| yyabortlab -- YYABORT comes here.  |
+`-----------------------------------*/
+yyabortlab:
+  yyresult = 1;
+  goto yyreturn;
+
+#ifndef yyoverflow
+/*----------------------------------------------.
+| yyoverflowlab -- parser overflow comes here.  |
+`----------------------------------------------*/
+yyoverflowlab:
+  yyerror ("parser stack overflow");
+  yyresult = 2;
+  /* Fall through.  */
+#endif
+
+yyreturn:
+#ifndef yyoverflow
+  if (yyss != yyssa)
+    YYSTACK_FREE (yyss);
+#endif
+  return yyresult;
+}
+
+
+#line 290 "gram.y"
+
+
+