X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/e141f4d4bb6584bfbf13003047a2e48e9a6eab6a..ccdc1577ef7fb32a5e30cb655337e7cd42b98987:/src/parse-gram.c?ds=inline

diff --git a/src/parse-gram.c b/src/parse-gram.c
index cb757d7f..0af5eb85 100644
--- a/src/parse-gram.c
+++ b/src/parse-gram.c
@@ -1,8 +1,8 @@
-/* A Bison parser, made by GNU Bison 2.4.462-882b.  */
+/* A Bison parser, made by GNU Bison 2.5.1.815-22b0.  */
 
-/* Implementation for Bison's Yacc-like parsers in C
+/* Bison implementation for Yacc-like parsers in C
 
-   Copyright (C) 1984, 1989-1990, 2000-2010 Free Software Foundation, Inc.
+   Copyright (C) 1984, 1989-1990, 2000-2012 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
@@ -44,7 +44,7 @@
 #define YYBISON 1
 
 /* Bison version.  */
-#define YYBISON_VERSION "2.4.462-882b"
+#define YYBISON_VERSION "2.5.1.815-22b0"
 
 /* Skeleton name.  */
 #define YYSKELETON_NAME "yacc.c"
@@ -58,9 +58,6 @@
 /* Pull parsers.  */
 #define YYPULL 1
 
-/* Using locations.  */
-#define YYLSP_NEEDED 1
-
 /* Substitute the variable and function names.  */
 #define yyparse         gram_parse
 #define yylex           gram_lex
@@ -72,11 +69,11 @@
 #define yylloc          gram_lloc
 
 /* Copy the first part of user declarations.  */
-/* Line 252 of yacc.c  */
+/* Line 328 of yacc.c  */
 #line 1 "src/parse-gram.y"
 /* Bison Grammar Parser                             -*- C -*-
 
-   Copyright (C) 2002-2010 Free Software Foundation, Inc.
+   Copyright (C) 2002-2012 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -108,12 +105,13 @@
 #include "symlist.h"
 #include "scan-gram.h"
 #include "scan-code.h"
+#include "xmemdup0.h"
 
 #define YYLLOC_DEFAULT(Current, Rhs, N)  (Current) = lloc_default (Rhs, N)
 static YYLTYPE lloc_default (YYLTYPE const *, int);
 
 #define YY_LOCATION_PRINT(File, Loc) \
-	  location_print (File, Loc)
+          location_print (File, Loc)
 
 static void version_check (location const *loc, char const *version);
 
@@ -121,18 +119,21 @@ static void version_check (location const *loc, char const *version);
    FIXME: depends on the undocumented availability of YYLLOC.  */
 #undef  yyerror
 #define yyerror(Msg) \
-	gram_error (&yylloc, Msg)
+        gram_error (&yylloc, Msg)
 static void gram_error (location const *, char const *);
 
 static char const *char_name (char);
 
-/* Line 252 of yacc.c  */
-#line 131 "src/parse-gram.c"
+/* Line 328 of yacc.c  */
+#line 129 "src/parse-gram.c"
 
-/* Enabling traces.  */
-#ifndef YYDEBUG
-# define YYDEBUG 1
-#endif
+# ifndef YY_NULL
+#  if defined __cplusplus && 201103L <= __cplusplus
+#   define YY_NULL nullptr
+#  else
+#   define YY_NULL 0
+#  endif
+# endif
 
 /* Enabling verbose error messages.  */
 #ifdef YYERROR_VERBOSE
@@ -142,14 +143,20 @@ static char const *char_name (char);
 # define YYERROR_VERBOSE 1
 #endif
 
-/* Enabling the token table.  */
-#ifndef YYTOKEN_TABLE
-# define YYTOKEN_TABLE 0
+/* In a future release of Bison, this section will be replaced
+   by #include "src/parse-gram.h".  */
+#ifndef GRAM_Y_TAB_H
+# define GRAM_Y_TAB_H
+/* Enabling traces.  */
+#ifndef YYDEBUG
+# define YYDEBUG 1
+#endif
+#if YYDEBUG
+extern int gram_debug;
 #endif
-
 /* "%code requires" blocks.  */
-/* Line 272 of yacc.c  */
-#line 201 "src/parse-gram.y"
+/* Line 342 of yacc.c  */
+#line 221 "src/parse-gram.y"
 
 # ifndef PARAM_TYPE
 #  define PARAM_TYPE
@@ -163,8 +170,8 @@ static char const *char_name (char);
 # endif
 
 
-/* Line 272 of yacc.c  */
-#line 168 "src/parse-gram.c"
+/* Line 342 of yacc.c  */
+#line 175 "src/parse-gram.c"
 
 /* Tokens.  */
 #ifndef YYTOKENTYPE
@@ -211,21 +218,22 @@ static char const *char_name (char);
      PERCENT_VERBOSE = 293,
      PERCENT_YACC = 294,
      BRACED_CODE = 295,
-     BRACKETED_ID = 296,
-     CHAR = 297,
-     EPILOGUE = 298,
-     EQUAL = 299,
-     ID = 300,
-     ID_COLON = 301,
-     PERCENT_PERCENT = 302,
-     PIPE = 303,
-     PROLOGUE = 304,
-     SEMICOLON = 305,
-     TAG = 306,
-     TAG_ANY = 307,
-     TAG_NONE = 308,
-     PERCENT_PARAM = 309,
-     PERCENT_UNION = 310
+     BRACED_PREDICATE = 296,
+     BRACKETED_ID = 297,
+     CHAR = 298,
+     EPILOGUE = 299,
+     EQUAL = 300,
+     ID = 301,
+     ID_COLON = 302,
+     PERCENT_PERCENT = 303,
+     PIPE = 304,
+     PROLOGUE = 305,
+     SEMICOLON = 306,
+     TAG = 307,
+     TAG_ANY = 308,
+     TAG_NONE = 309,
+     PERCENT_PARAM = 310,
+     PERCENT_UNION = 311
    };
 #endif
 /* Tokens.  */
@@ -268,30 +276,30 @@ static char const *char_name (char);
 #define PERCENT_VERBOSE 293
 #define PERCENT_YACC 294
 #define BRACED_CODE 295
-#define BRACKETED_ID 296
-#define CHAR 297
-#define EPILOGUE 298
-#define EQUAL 299
-#define ID 300
-#define ID_COLON 301
-#define PERCENT_PERCENT 302
-#define PIPE 303
-#define PROLOGUE 304
-#define SEMICOLON 305
-#define TAG 306
-#define TAG_ANY 307
-#define TAG_NONE 308
-#define PERCENT_PARAM 309
-#define PERCENT_UNION 310
-
+#define BRACED_PREDICATE 296
+#define BRACKETED_ID 297
+#define CHAR 298
+#define EPILOGUE 299
+#define EQUAL 300
+#define ID 301
+#define ID_COLON 302
+#define PERCENT_PERCENT 303
+#define PIPE 304
+#define PROLOGUE 305
+#define SEMICOLON 306
+#define TAG 307
+#define TAG_ANY 308
+#define TAG_NONE 309
+#define PERCENT_PARAM 310
+#define PERCENT_UNION 311
 
 
 
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 typedef union YYSTYPE
 {
-/* Line 277 of yacc.c  */
-#line 87 "src/parse-gram.y"
+/* Line 342 of yacc.c  */
+#line 107 "src/parse-gram.y"
 
   assoc assoc;
   char *code;
@@ -303,14 +311,14 @@ typedef union YYSTYPE
   uniqstr uniqstr;
   unsigned char character;
 
-/* Line 277 of yacc.c  */
-#line 225 "src/parse-gram.y"
+/* Line 342 of yacc.c  */
+#line 245 "src/parse-gram.y"
 
   param_type param;
 
 
-/* Line 277 of yacc.c  */
-#line 314 "src/parse-gram.c"
+/* Line 342 of yacc.c  */
+#line 322 "src/parse-gram.c"
 } YYSTYPE;
 # define YYSTYPE_IS_TRIVIAL 1
 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
@@ -331,28 +339,64 @@ typedef struct YYLTYPE
 #endif
 
 
+#ifdef YYPARSE_PARAM
+#if (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+int gram_parse (void *YYPARSE_PARAM);
+#else
+int gram_parse ();
+#endif
+#else /* ! YYPARSE_PARAM */
+#if (defined __STDC__ || defined __C99__FUNC__ \
+     || defined __cplusplus || defined _MSC_VER)
+int gram_parse (void);
+#else
+int gram_parse ();
+#endif
+#endif /* ! YYPARSE_PARAM */
+
+#endif /* !GRAM_Y_TAB_H  */
+
 /* Copy the second part of user declarations.  */
 
-/* Line 327 of yacc.c  */
-#line 338 "src/parse-gram.c"
+/* Line 345 of yacc.c  */
+#line 364 "src/parse-gram.c"
 /* Unqualified %code blocks.  */
-/* Line 328 of yacc.c  */
-#line 55 "src/parse-gram.y"
+/* Line 346 of yacc.c  */
+#line 56 "src/parse-gram.y"
 
   static int current_prec = 0;
   static location current_lhs_location;
   static named_ref *current_lhs_named_ref;
-  static symbol *current_lhs;
+  static symbol *current_lhs_symbol;
   static symbol_class current_class = unknown_sym;
   static uniqstr current_type = NULL;
 
+  /** Set the new current left-hand side symbol, possibly common
+   * to several right-hand side parts of rule.
+   */
+  static
+  void
+  current_lhs(symbol *sym, location loc, named_ref *ref)
+  {
+    current_lhs_symbol = sym;
+    current_lhs_location = loc;
+    /* In order to simplify memory management, named references for lhs
+       are always assigned by deep copy into the current symbol_list
+       node.  This is because a single named-ref in the grammar may
+       result in several uses when the user factors lhs between several
+       rules using "|".  Therefore free the parser's original copy.  */
+    free (current_lhs_named_ref);
+    current_lhs_named_ref = ref;
+  }
+
   #define YYTYPE_INT16 int_fast16_t
   #define YYTYPE_INT8 int_fast8_t
   #define YYTYPE_UINT16 uint_fast16_t
   #define YYTYPE_UINT8 uint_fast8_t
 
-/* Line 328 of yacc.c  */
-#line 214 "src/parse-gram.y"
+/* Line 346 of yacc.c  */
+#line 234 "src/parse-gram.y"
 
   /** Add a lex-param and/or a parse-param.
    *
@@ -364,8 +408,8 @@ typedef struct YYLTYPE
   static param_type current_param = param_none;
 
 
-/* Line 328 of yacc.c  */
-#line 369 "src/parse-gram.c"
+/* Line 346 of yacc.c  */
+#line 413 "src/parse-gram.c"
 
 #ifdef short
 # undef short
@@ -451,34 +495,10 @@ YYID (yyi)
 }
 #endif
 
-#if ! defined yyoverflow || YYERROR_VERBOSE
+#if 1
 
 /* The parser invokes alloca or malloc; define the necessary symbols.  */
 
-# ifdef YYSTACK_USE_ALLOCA
-#  if YYSTACK_USE_ALLOCA
-#   ifdef __GNUC__
-#    define YYSTACK_ALLOC __builtin_alloca
-#   elif defined __BUILTIN_VA_ARG_INCR
-#    include <alloca.h> /* INFRINGES ON USER NAME SPACE */
-#   elif defined _AIX
-#    define YYSTACK_ALLOC __alloca
-#   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 && (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
-#     include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
-#     ifndef _STDLIB_H
-#      define _STDLIB_H 1
-#     endif
-#    endif
-#   endif
-#  endif
-# endif
-
 # ifdef YYSTACK_ALLOC
    /* Pacify GCC's `empty if-body' warning.  */
 #  define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
@@ -495,36 +515,37 @@ YYID (yyi)
 #  ifndef YYSTACK_ALLOC_MAXIMUM
 #   define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
 #  endif
-#  if (defined __cplusplus && ! defined _STDLIB_H \
+#  if (defined __cplusplus && ! defined EXIT_SUCCESS \
        && ! ((defined YYMALLOC || defined malloc) \
-	     && (defined YYFREE || defined free)))
+             && (defined YYFREE || defined free)))
 #   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
-#   ifndef _STDLIB_H
-#    define _STDLIB_H 1
+#   ifndef EXIT_SUCCESS
+#    define EXIT_SUCCESS 0
 #   endif
 #  endif
 #  ifndef YYMALLOC
 #   define YYMALLOC malloc
-#   if ! defined malloc && ! defined _STDLIB_H && (defined __STDC__ || defined __C99__FUNC__ \
+#   if ! defined malloc && ! defined EXIT_SUCCESS && (defined __STDC__ || defined __C99__FUNC__ \
      || defined __cplusplus || defined _MSC_VER)
 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
 #   endif
 #  endif
 #  ifndef YYFREE
 #   define YYFREE free
-#   if ! defined free && ! defined _STDLIB_H && (defined __STDC__ || defined __C99__FUNC__ \
+#   if ! defined free && ! defined EXIT_SUCCESS && (defined __STDC__ || defined __C99__FUNC__ \
      || defined __cplusplus || defined _MSC_VER)
 void free (void *); /* INFRINGES ON USER NAME SPACE */
 #   endif
 #  endif
 # endif
-#endif /* ! defined yyoverflow || YYERROR_VERBOSE */
+# define YYCOPY_NEEDED 1
+#endif
 
 
 #if (! defined yyoverflow \
      && (! defined __cplusplus \
-	 || (defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
-	     && defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
+         || (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
@@ -543,62 +564,66 @@ union yyalloc
      ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
       + 2 * YYSTACK_GAP_MAXIMUM)
 
-/* Copy COUNT objects from FROM to TO.  The source and destination do
-   not overlap.  */
-# ifndef YYCOPY
-#  if defined __GNUC__ && 1 < __GNUC__
-#   define YYCOPY(To, From, Count) \
-      __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
-#  else
-#   define YYCOPY(To, From, Count)		\
-      do					\
-	{					\
-	  YYSIZE_T yyi;				\
-	  for (yyi = 0; yyi < (Count); yyi++)	\
-	    (To)[yyi] = (From)[yyi];		\
-	}					\
-      while (YYID (0))
-#  endif
-# endif
+# define YYCOPY_NEEDED 1
 
 /* 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_alloc, Stack)				\
-    do									\
-      {									\
-	YYSIZE_T yynewbytes;						\
-	YYCOPY (&yyptr->Stack_alloc, Stack, yysize);			\
-	Stack = &yyptr->Stack_alloc;					\
-	yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
-	yyptr += yynewbytes / sizeof (*yyptr);				\
-      }									\
+# define YYSTACK_RELOCATE(Stack_alloc, Stack)                           \
+    do                                                                  \
+      {                                                                 \
+        YYSIZE_T yynewbytes;                                            \
+        YYCOPY (&yyptr->Stack_alloc, Stack, yysize);                    \
+        Stack = &yyptr->Stack_alloc;                                    \
+        yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
+        yyptr += yynewbytes / sizeof (*yyptr);                          \
+      }                                                                 \
     while (YYID (0))
 
 #endif
 
+#if defined YYCOPY_NEEDED && YYCOPY_NEEDED
+/* Copy COUNT objects from SRC to DST.  The source and destination do
+   not overlap.  */
+# ifndef YYCOPY
+#  if defined __GNUC__ && 1 < __GNUC__
+#   define YYCOPY(Dst, Src, Count) \
+      __builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src)))
+#  else
+#   define YYCOPY(Dst, Src, Count)              \
+      do                                        \
+        {                                       \
+          YYSIZE_T yyi;                         \
+          for (yyi = 0; yyi < (Count); yyi++)   \
+            (Dst)[yyi] = (Src)[yyi];            \
+        }                                       \
+      while (YYID (0))
+#  endif
+# endif
+#endif /* !YYCOPY_NEEDED */
+
 /* YYFINAL -- State number of the termination state.  */
 #define YYFINAL  3
 /* YYLAST -- Last index in YYTABLE.  */
-#define YYLAST   162
+#define YYLAST   163
 
 /* YYNTOKENS -- Number of terminals.  */
-#define YYNTOKENS  56
+#define YYNTOKENS  57
 /* YYNNTS -- Number of nonterminals.  */
 #define YYNNTS  36
 /* YYNRULES -- Number of rules.  */
-#define YYNRULES  109
+#define YYNRULES  110
 /* YYNSTATES -- Number of states.  */
-#define YYNSTATES  148
+#define YYNSTATES  149
 
 /* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned
    by yylex, with out-of-bounds checking.  */
 #define YYUNDEFTOK  2
-#define YYMAXUTOK   310
+#define YYMAXUTOK   311
 
-#define YYTRANSLATE(YYX)						\
+#define YYTRANSLATE(YYX)                                                \
   ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
 
 /* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
@@ -636,28 +661,29 @@ static const yytype_uint8 yytranslate[] =
       25,    26,    27,    28,    29,    30,    31,    32,    33,    34,
       35,    36,    37,    38,    39,    40,    41,    42,    43,    44,
       45,    46,    47,    48,    49,    50,    51,    52,    53,    54,
-      55
+      55,    56
 };
 
 #if YYDEBUG
   /* YYRLINEYYN -- Source line where rule number YYN was defined.    */
 static const yytype_uint16 yyrline[] =
 {
-       0,   250,   250,   258,   260,   264,   265,   275,   279,   284,
-     285,   290,   295,   296,   297,   298,   299,   304,   313,   314,
-     315,   316,   317,   318,   319,   320,   320,   321,   322,   346,
-     347,   348,   349,   353,   354,   363,   364,   365,   369,   376,
-     383,   387,   391,   398,   413,   414,   418,   430,   430,   435,
-     435,   440,   451,   466,   467,   468,   469,   473,   474,   479,
-     481,   486,   487,   492,   494,   499,   500,   504,   505,   506,
-     507,   512,   517,   522,   528,   534,   545,   546,   555,   556,
-     562,   563,   564,   571,   571,   576,   577,   578,   583,   585,
-     587,   589,   591,   593,   598,   600,   611,   612,   617,   618,
-     619,   628,   648,   650,   659,   664,   665,   670,   677,   679
+       0,   270,   270,   278,   280,   284,   285,   295,   299,   304,
+     305,   310,   315,   316,   317,   318,   319,   324,   333,   334,
+     335,   336,   337,   338,   339,   340,   340,   341,   342,   366,
+     367,   368,   369,   373,   374,   383,   384,   385,   389,   396,
+     403,   407,   411,   418,   433,   434,   438,   450,   450,   455,
+     455,   460,   471,   486,   487,   488,   489,   493,   494,   499,
+     501,   506,   507,   512,   514,   519,   520,   524,   525,   526,
+     527,   532,   537,   542,   548,   554,   565,   566,   575,   576,
+     582,   583,   584,   591,   591,   599,   600,   601,   606,   608,
+     610,   612,   614,   616,   618,   623,   625,   635,   636,   641,
+     642,   643,   652,   672,   674,   683,   688,   689,   694,   701,
+     703
 };
 #endif
 
-#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
+#if YYDEBUG || YYERROR_VERBOSE || 1
 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
    First, the terminals, then, starting at YYNTOKENS, nonterminals.  */
 static const char *const yytname[] =
@@ -672,10 +698,10 @@ static const char *const yytname[] =
   "\"%name-prefix\"", "\"%no-default-prec\"", "\"%no-lines\"",
   "\"%nondeterministic-parser\"", "\"%output\"", "\"%require\"",
   "\"%skeleton\"", "\"%start\"", "\"%token-table\"", "\"%verbose\"",
-  "\"%yacc\"", "\"{...}\"", "\"[identifier]\"", "\"char\"", "\"epilogue\"",
-  "\"=\"", "\"identifier\"", "\"identifier:\"", "\"%%\"", "\"|\"",
-  "\"%{...%}\"", "\";\"", "\"<tag>\"", "\"<*>\"", "\"<>\"", "\"%param\"",
-  "\"%union\"", "$accept", "input", "prologue_declarations",
+  "\"%yacc\"", "\"{...}\"", "\"%?{...}\"", "\"[identifier]\"", "\"char\"",
+  "\"epilogue\"", "\"=\"", "\"identifier\"", "\"identifier:\"", "\"%%\"",
+  "\"|\"", "\"%{...%}\"", "\";\"", "\"<tag>\"", "\"<*>\"", "\"<>\"",
+  "\"%param\"", "\"%union\"", "$accept", "input", "prologue_declarations",
   "prologue_declaration", "$@1", "params", "grammar_declaration",
   "union_name", "symbol_declaration", "$@2", "$@3",
   "precedence_declaration", "precedence_declarator", "tag.opt",
@@ -683,7 +709,7 @@ static const char *const yytname[] =
   "generic_symlist_item", "symbol_def", "symbol_defs.1", "grammar",
   "rules_or_grammar_declaration", "rules", "$@4", "rhses.1", "rhs",
   "named_ref.opt", "variable", "content.opt", "braceless", "id",
-  "id_colon", "symbol", "string_as_id", "epilogue.opt", 0
+  "id_colon", "symbol", "string_as_id", "epilogue.opt", YY_NULL
 };
 #endif
 
@@ -697,16 +723,16 @@ static const yytype_uint16 yytoknum[] =
      275,   276,   277,   278,   279,   280,   281,   282,   283,   284,
      285,   286,   287,   288,   289,   290,   291,   292,   293,   294,
      295,   296,   297,   298,   299,   300,   301,   302,   303,   304,
-     305,   306,   307,   308,   309,   310
+     305,   306,   307,   308,   309,   310,   311
 };
 # endif
 
-#define YYPACT_NINF -137
+#define YYPACT_NINF -50
 
 #define yypact_value_is_default(yystate) \
-  ((yystate) == (-137))
+  ((yystate) == (-50))
 
-#define YYTABLE_NINF -109
+#define YYTABLE_NINF -110
 
 #define yytable_value_is_error(yytable_value) \
   YYID (0)
@@ -715,21 +741,21 @@ static const yytype_uint16 yytoknum[] =
      STATE-NUM.    */
 static const yytype_int16 yypact[] =
 {
-    -137,    20,   106,  -137,  -137,  -137,    19,    -1,    36,  -137,
-    -137,  -137,  -137,    13,  -137,     0,    79,  -137,    89,    90,
-    -137,    41,  -137,    55,    93,    46,  -137,  -137,  -137,    47,
-      94,    95,    35,  -137,  -137,  -137,    16,  -137,  -137,  -137,
-      54,  -137,  -137,  -137,  -137,    49,    33,    33,    35,    12,
-      12,  -137,    61,  -137,  -137,  -137,    29,  -137,  -137,  -137,
-    -137,   100,  -137,  -137,  -137,   101,  -137,   103,  -137,  -137,
-    -137,  -137,  -137,  -137,  -137,  -137,    57,  -137,    58,     1,
-    -137,  -137,    68,    80,  -137,    61,  -137,    35,  -137,  -137,
-      33,    56,    33,    35,  -137,  -137,  -137,  -137,    12,  -137,
-    -137,    12,  -137,  -137,  -137,  -137,  -137,  -137,  -137,  -137,
-    -137,    78,  -137,  -137,  -137,  -137,  -137,    82,  -137,    35,
-    -137,   142,  -137,   144,  -137,  -137,  -137,  -137,  -137,  -137,
-    -137,  -137,  -137,    18,    27,  -137,  -137,    35,   145,    97,
-      68,    68,    27,  -137,  -137,  -137,  -137,  -137
+     -50,     4,   107,   -50,   -50,   -50,   -20,     3,    11,   -50,
+     -50,   -50,   -50,    14,   -50,    12,    68,   -50,    72,    73,
+     -50,     0,   -50,    45,    86,     2,   -50,   -50,   -50,    17,
+      95,    96,    32,   -50,   -50,   -50,    16,   -50,   -50,   -50,
+      54,   -50,   -50,   -50,   -50,    49,    -2,    -2,    32,    27,
+      27,   -50,    63,   -50,   -50,   -50,    37,   -50,   -50,   -50,
+     -50,   101,   -50,   -50,   -50,   103,   -50,   104,   -50,   -50,
+     -50,   -50,   -50,   -50,   -50,   -50,    57,   -50,    58,     1,
+     -50,   -50,    79,    70,   -50,    63,   -50,    32,   -50,   -50,
+      -2,    64,    -2,    32,   -50,   -50,   -50,   -50,    27,   -50,
+     -50,    27,   -50,   -50,   -50,   -50,   -50,   -50,   -50,   -50,
+     -50,    78,   -50,   -50,   -50,   -50,   -50,    83,   -50,    32,
+     -50,   143,   -50,   145,   -50,   -50,   -50,   -50,   -50,   -50,
+     -50,   -50,   -50,    43,    50,   -50,   -50,    32,   146,    97,
+      79,   -50,    79,    50,   -50,   -50,   -50,   -50,   -50
 };
 
   /* YYDEFACT[S] -- default reduction number in state S.  Performed when
@@ -742,25 +768,25 @@ static const yytype_uint8 yydefact[] =
        7,     0,    16,     0,     0,     0,    41,    21,    22,     0,
        0,     0,     0,    29,    30,    31,     0,     6,    32,    25,
       44,     4,     5,    36,    35,    57,     0,     0,     0,     0,
-       0,   101,     0,    42,    97,    96,    98,    10,    12,    13,
+       0,   102,     0,    42,    98,    97,    99,    10,    12,    13,
       14,     0,    17,    18,    19,     0,    23,     0,    27,    28,
-     107,   103,   102,   105,    37,   106,     0,   104,     0,     0,
-      78,    80,    94,     0,    45,     0,    58,     0,    71,    76,
+     108,   104,   103,   106,    37,   107,     0,   105,     0,     0,
+      78,    80,    95,     0,    45,     0,    58,     0,    71,    76,
       50,    72,    48,    51,    63,    68,    69,    70,    38,    65,
-      67,    39,    43,   100,    99,     8,    15,    20,    24,    82,
-      81,     0,    79,     2,    95,    83,    34,    26,    46,    52,
-      59,    61,    77,    73,    74,    64,    66,   109,    88,    33,
+      67,    39,    43,   101,   100,     8,    15,    20,    24,    82,
+      81,     0,    79,     2,    96,    83,    34,    26,    46,    52,
+      59,    61,    77,    73,    74,    64,    66,   110,    88,    33,
       60,    62,    75,    84,    85,    88,    87,     0,     0,     0,
-      94,    94,    86,    91,    92,    93,    90,    89
+      95,    91,    95,    86,    92,    93,    94,    90,    89
 };
 
   /* YYPGOTO[NTERM-NUM].    */
 static const yytype_int16 yypgoto[] =
 {
-    -137,  -137,  -137,  -137,  -137,  -137,   148,  -137,  -137,  -137,
-    -137,  -137,  -137,  -137,  -137,    32,  -137,   102,    -9,    -4,
-     107,  -137,    83,  -137,  -137,  -137,    22,  -136,  -137,  -137,
-     -12,   -11,  -137,   -32,   -40,  -137
+     -50,   -50,   -50,   -50,   -50,   -50,   149,   -50,   -50,   -50,
+     -50,   -50,   -50,   -50,   -50,    33,   -50,   106,   -42,    -4,
+     112,   -50,    74,   -50,   -50,   -50,    19,   -45,   -50,   -50,
+     -16,    -8,   -50,   -32,   -49,   -50
 };
 
   /* YYDEFGOTO[NTERM-NUM].    */
@@ -777,81 +803,82 @@ static const yytype_int16 yydefgoto[] =
      number is the opposite.  If YYTABLE_NINF, syntax error.    */
 static const yytype_int16 yytable[] =
 {
-      74,  -108,    76,    54,   146,   147,     4,     5,     6,     7,
-       8,     9,    10,    11,    12,    70,    94,    76,    13,    14,
-       3,     4,     5,     6,     7,     8,     9,    10,    11,    12,
-      70,    26,   103,    13,    14,    91,    91,    32,    70,    49,
-     102,   137,   138,   139,    60,    55,    26,    77,   111,    64,
-      66,   124,    32,    51,    71,   121,    40,    72,    52,    70,
-     123,   125,    77,    95,    96,    97,   135,   140,   136,    71,
-      48,    40,    72,   118,   104,    71,    50,    71,    72,    91,
-      72,    91,    57,   132,    88,    61,   122,   121,   122,   126,
-      65,    67,   126,    58,    59,    62,    63,    68,    69,    84,
-      86,    51,   141,   106,   107,   143,   108,   109,   110,   114,
-     141,     4,     5,     6,     7,     8,     9,    10,    11,    12,
-     116,   127,   129,    13,    14,    15,    16,    17,    18,    19,
-      20,    21,    22,    23,    24,    25,    26,    27,    28,    29,
-      30,    31,    32,    33,    34,    35,   131,    70,   145,   144,
-      42,   130,   101,    36,    92,    37,    38,   142,     0,     0,
-      39,    40,   112
+      74,  -109,    76,    60,     3,    64,     4,     5,     6,     7,
+       8,     9,    10,    11,    12,    54,    94,    76,    13,    14,
+      66,     4,     5,     6,     7,     8,     9,    10,    11,    12,
+      70,    26,    48,    13,    14,    70,   102,    32,    91,    91,
+     103,    71,   124,    49,    72,    61,    26,    65,    77,   111,
+      88,    50,    32,    70,    51,   121,   126,    40,    55,   126,
+      52,   125,    67,    77,   137,   138,   139,    70,   123,   118,
+      71,    57,    40,    72,   132,    71,    58,    59,    72,    95,
+      96,    97,    91,   104,    91,    62,   122,   121,   122,    63,
+     140,   141,   135,    71,   136,   147,    72,   148,    68,    69,
+      84,    86,   142,    51,   106,   144,   107,   108,   109,   110,
+     116,   142,     4,     5,     6,     7,     8,     9,    10,    11,
+      12,   114,   127,   129,    13,    14,    15,    16,    17,    18,
+      19,    20,    21,    22,    23,    24,    25,    26,    27,    28,
+      29,    30,    31,    32,    33,    34,    35,   131,    70,   146,
+     145,    42,   130,   112,   143,    36,   101,    37,    38,    92,
+       0,     0,    39,    40
 };
 
 static const yytype_int16 yycheck[] =
 {
-      32,     0,     1,     3,   140,   141,     5,     6,     7,     8,
+      32,     0,     1,     3,     0,     3,     5,     6,     7,     8,
        9,    10,    11,    12,    13,     3,    48,     1,    17,    18,
-       0,     5,     6,     7,     8,     9,    10,    11,    12,    13,
-       3,    30,     3,    17,    18,    46,    47,    36,     3,    40,
-      52,    14,    15,    16,     3,    45,    30,    46,    47,     3,
-       3,    91,    36,    40,    42,    87,    55,    45,    45,     3,
-       4,    93,    46,    51,    52,    53,    48,    40,    50,    42,
-      51,    55,    45,    85,    45,    42,    40,    42,    45,    90,
-      45,    92,     3,   123,    51,    44,    90,   119,    92,    98,
-      44,    44,   101,     4,     4,    40,     3,     3,     3,    45,
-      51,    40,   134,     3,     3,   137,     3,    50,    50,    41,
-     142,     5,     6,     7,     8,     9,    10,    11,    12,    13,
-      40,    43,    40,    17,    18,    19,    20,    21,    22,    23,
-      24,    25,    26,    27,    28,    29,    30,    31,    32,    33,
-      34,    35,    36,    37,    38,    39,     4,     3,    51,     4,
-       2,   119,    50,    47,    47,    49,    50,   135,    -1,    -1,
-      54,    55,    79
+       3,     5,     6,     7,     8,     9,    10,    11,    12,    13,
+       3,    30,    52,    17,    18,     3,    52,    36,    46,    47,
+       3,    43,    91,    40,    46,    45,    30,    45,    47,    48,
+      52,    40,    36,     3,    40,    87,    98,    56,    46,   101,
+      46,    93,    45,    47,    14,    15,    16,     3,     4,    85,
+      43,     3,    56,    46,   123,    43,     4,     4,    46,    52,
+      53,    54,    90,    46,    92,    40,    90,   119,    92,     3,
+      40,    41,    49,    43,    51,   140,    46,   142,     3,     3,
+      46,    52,   134,    40,     3,   137,     3,     3,    51,    51,
+      40,   143,     5,     6,     7,     8,     9,    10,    11,    12,
+      13,    42,    44,    40,    17,    18,    19,    20,    21,    22,
+      23,    24,    25,    26,    27,    28,    29,    30,    31,    32,
+      33,    34,    35,    36,    37,    38,    39,     4,     3,    52,
+       4,     2,   119,    79,   135,    48,    50,    50,    51,    47,
+      -1,    -1,    55,    56
 };
 
   /* STOS_[STATE-NUM] -- The (internal number of the) accessing
      symbol of state STATE-NUM.    */
 static const yytype_uint8 yystos[] =
 {
-       0,    57,    58,     0,     5,     6,     7,     8,     9,    10,
+       0,    58,    59,     0,     5,     6,     7,     8,     9,    10,
       11,    12,    13,    17,    18,    19,    20,    21,    22,    23,
       24,    25,    26,    27,    28,    29,    30,    31,    32,    33,
-      34,    35,    36,    37,    38,    39,    47,    49,    50,    54,
-      55,    59,    62,    64,    67,    68,    66,    65,    51,    40,
-      40,    40,    45,    86,     3,    45,    84,     3,     4,     4,
-       3,    44,    40,     3,     3,    44,     3,    44,     3,     3,
-       3,    42,    45,    87,    89,    90,     1,    46,    62,    77,
-      78,    79,    88,    60,    45,    63,    51,    69,    51,    75,
-      76,    87,    76,    72,    89,    51,    52,    53,    73,    74,
-      89,    73,    86,     3,    45,    85,     3,     3,     3,    50,
-      50,    47,    78,    91,    41,    83,    40,    61,    86,    70,
-      71,    89,    75,     4,    90,    89,    74,    43,    80,    40,
-      71,     4,    90,    81,    82,    48,    50,    14,    15,    16,
-      40,    89,    82,    89,     4,    51,    83,    83
+      34,    35,    36,    37,    38,    39,    48,    50,    51,    55,
+      56,    60,    63,    65,    68,    69,    67,    66,    52,    40,
+      40,    40,    46,    87,     3,    46,    85,     3,     4,     4,
+       3,    45,    40,     3,     3,    45,     3,    45,     3,     3,
+       3,    43,    46,    88,    90,    91,     1,    47,    63,    78,
+      79,    80,    89,    61,    46,    64,    52,    70,    52,    76,
+      77,    88,    77,    73,    90,    52,    53,    54,    74,    75,
+      90,    74,    87,     3,    46,    86,     3,     3,     3,    51,
+      51,    48,    79,    92,    42,    84,    40,    62,    87,    71,
+      72,    90,    76,     4,    91,    90,    75,    44,    81,    40,
+      72,     4,    91,    82,    83,    49,    51,    14,    15,    16,
+      40,    41,    90,    83,    90,     4,    52,    84,    84
 };
 
   /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.    */
 static const yytype_uint8 yyr1[] =
 {
-       0,    56,    57,    58,    58,    59,    59,    59,    59,    59,
-      59,    59,    59,    59,    59,    59,    59,    59,    59,    59,
-      59,    59,    59,    59,    59,    60,    59,    59,    59,    59,
-      59,    59,    59,    61,    61,    62,    62,    62,    62,    62,
-      62,    62,    62,    62,    63,    63,    62,    65,    64,    66,
-      64,    64,    67,    68,    68,    68,    68,    69,    69,    70,
-      70,    71,    71,    72,    72,    73,    73,    74,    74,    74,
-      74,    75,    75,    75,    75,    75,    76,    76,    77,    77,
-      78,    78,    78,    80,    79,    81,    81,    81,    82,    82,
-      82,    82,    82,    82,    83,    83,    84,    84,    85,    85,
-      85,    86,    87,    87,    88,    89,    89,    90,    91,    91
+       0,    57,    58,    59,    59,    60,    60,    60,    60,    60,
+      60,    60,    60,    60,    60,    60,    60,    60,    60,    60,
+      60,    60,    60,    60,    60,    61,    60,    60,    60,    60,
+      60,    60,    60,    62,    62,    63,    63,    63,    63,    63,
+      63,    63,    63,    63,    64,    64,    63,    66,    65,    67,
+      65,    65,    68,    69,    69,    69,    69,    70,    70,    71,
+      71,    72,    72,    73,    73,    74,    74,    75,    75,    75,
+      75,    76,    76,    76,    76,    76,    77,    77,    78,    78,
+      79,    79,    79,    81,    80,    82,    82,    82,    83,    83,
+      83,    83,    83,    83,    83,    84,    84,    85,    85,    86,
+      86,    86,    87,    88,    88,    89,    90,    90,    91,    92,
+      92
 };
 
   /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.    */
@@ -866,19 +893,20 @@ static const yytype_uint8 yyr2[] =
        2,     1,     2,     1,     2,     1,     2,     1,     1,     1,
        1,     1,     1,     2,     2,     3,     1,     2,     1,     2,
        1,     2,     2,     0,     4,     1,     3,     2,     0,     3,
-       3,     3,     3,     3,     0,     1,     1,     1,     0,     1,
-       1,     1,     1,     1,     1,     1,     1,     1,     0,     2
+       3,     2,     3,     3,     3,     0,     1,     1,     1,     0,
+       1,     1,     1,     1,     1,     1,     1,     1,     1,     0,
+       2
 };
 
 
-#define yyerrok		(yyerrstatus = 0)
-#define yyclearin	(yychar = YYEMPTY)
-#define YYEMPTY		(-2)
-#define YYEOF		0
+#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 yyerrorlab
+#define YYACCEPT        goto yyacceptlab
+#define YYABORT         goto yyabortlab
+#define YYERROR         goto yyerrorlab
 
 
 /* Like YYERROR except do call yyerror.  This remains here temporarily
@@ -888,7 +916,7 @@ static const yytype_uint8 yyr2[] =
    in Bison 2.4.2's NEWS entry, where a plan to phase it out is
    discussed.  */
 
-#define YYFAIL		goto yyerrlab
+#define YYFAIL          goto yyerrlab
 #if defined YYFAIL
   /* This is here to suppress warnings from the GCC cpp's
      -Wunused-macros.  Normally we don't worry about that warning, but
@@ -898,25 +926,27 @@ static const yytype_uint8 yyr2[] =
 
 #define YYRECOVERING()  (!!yyerrstatus)
 
-#define YYBACKUP(Token, Value)					\
-do								\
-  if (yychar == YYEMPTY && yylen == 1)				\
-    {								\
-      yychar = (Token);						\
-      yylval = (Value);						\
-      YYPOPSTACK (1);						\
-      goto yybackup;						\
-    }								\
-  else								\
-    {								\
+#define YYBACKUP(Token, Value)                                  \
+do                                                              \
+  if (yychar == YYEMPTY)                                        \
+    {                                                           \
+      yychar = (Token);                                         \
+      yylval = (Value);                                         \
+      YYPOPSTACK (yylen);                                       \
+      yystate = *yyssp;                                         \
+      YY_LAC_DISCARD ("YYBACKUP");                              \
+      goto yybackup;                                            \
+    }                                                           \
+  else                                                          \
+    {                                                           \
       yyerror (YY_("syntax error: cannot back up")); \
-      YYERROR;							\
-    }								\
+      YYERROR;                                                  \
+    }                                                           \
 while (YYID (0))
 
 
-#define YYTERROR	1
-#define YYERRCODE	256
+#define YYTERROR        1
+#define YYERRCODE       256
 
 
 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
@@ -925,22 +955,22 @@ while (YYID (0))
 
 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
 #ifndef YYLLOC_DEFAULT
-# define YYLLOC_DEFAULT(Current, Rhs, N)				\
-    do									\
+# define YYLLOC_DEFAULT(Current, Rhs, N)                                \
+    do                                                                  \
       if (YYID (N))                                                    \
-	{								\
-	  (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;	\
-	  (Current).first_column = YYRHSLOC (Rhs, 1).first_column;	\
-	  (Current).last_line    = YYRHSLOC (Rhs, N).last_line;		\
-	  (Current).last_column  = YYRHSLOC (Rhs, N).last_column;	\
-	}								\
-      else								\
-	{								\
-	  (Current).first_line   = (Current).last_line   =		\
-	    YYRHSLOC (Rhs, 0).last_line;				\
-	  (Current).first_column = (Current).last_column =		\
-	    YYRHSLOC (Rhs, 0).last_column;				\
-	}								\
+        {                                                               \
+          (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;        \
+          (Current).first_column = YYRHSLOC (Rhs, 1).first_column;      \
+          (Current).last_line    = YYRHSLOC (Rhs, N).last_line;         \
+          (Current).last_column  = YYRHSLOC (Rhs, N).last_column;       \
+        }                                                               \
+      else                                                              \
+        {                                                               \
+          (Current).first_line   = (Current).last_line   =              \
+            YYRHSLOC (Rhs, 0).last_line;                                \
+          (Current).first_column = (Current).last_column =              \
+            YYRHSLOC (Rhs, 0).last_column;                              \
+        }                                                               \
     while (YYID (0))
 #endif
 
@@ -951,10 +981,10 @@ while (YYID (0))
 
 #ifndef YY_LOCATION_PRINT
 # if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
-#  define YY_LOCATION_PRINT(File, Loc)			\
-     fprintf (File, "%d.%d-%d.%d",			\
-	      (Loc).first_line, (Loc).first_column,	\
-	      (Loc).last_line,  (Loc).last_column)
+#  define YY_LOCATION_PRINT(File, Loc)                  \
+     fprintf (File, "%d.%d-%d.%d",                      \
+              (Loc).first_line, (Loc).first_column,     \
+              (Loc).last_line,  (Loc).last_column)
 # else
 #  define YY_LOCATION_PRINT(File, Loc) ((void) 0)
 # endif
@@ -977,21 +1007,21 @@ while (YYID (0))
 #  define YYFPRINTF fprintf
 # endif
 
-# define YYDPRINTF(Args)			\
-do {						\
-  if (yydebug)					\
-    YYFPRINTF Args;				\
+# define YYDPRINTF(Args)                        \
+do {                                            \
+  if (yydebug)                                  \
+    YYFPRINTF Args;                             \
 } while (YYID (0))
 
-# define YY_SYMBOL_PRINT(Title, Type, Value, Location)			  \
-do {									  \
-  if (yydebug)								  \
-    {									  \
-      YYFPRINTF (stderr, "%s ", Title);					  \
-      yy_symbol_print (stderr,						  \
-		  Type, Value, Location); \
-      YYFPRINTF (stderr, "\n");						  \
-    }									  \
+# define YY_SYMBOL_PRINT(Title, Type, Value, Location)                    \
+do {                                                                      \
+  if (yydebug)                                                            \
+    {                                                                     \
+      YYFPRINTF (stderr, "%s ", Title);                                   \
+      yy_symbol_print (stderr,                                            \
+                  Type, Value, Location); \
+      YYFPRINTF (stderr, "\n");                                           \
+    }                                                                     \
 } while (YYID (0))
 
 
@@ -1013,120 +1043,120 @@ yy_symbol_value_print (yyoutput, yytype, yyvaluep, yylocationp)
     YYLTYPE const * const yylocationp;
 #endif
 {
+  FILE *yyo = yyoutput;
+  YYUSE(yyo);
+  YYUSE (yylocationp);
   if (!yyvaluep)
     return;
-  YYUSE (yylocationp);
 # ifdef YYPRINT
   if (yytype < YYNTOKENS)
     YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
-# else
-  YYUSE (yyoutput);
 # endif
   switch (yytype)
     {
             case 3: // "string"
 
-/* Line 729 of yacc.c  */
-#line 174 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 194 "src/parse-gram.y"
         { fputs (quotearg_style (c_quoting_style, ((*yyvaluep).chars)), stderr); }
-/* Line 729 of yacc.c  */
-#line 1034 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1064 "src/parse-gram.c"
         break;
 
             case 4: // "integer"
 
-/* Line 729 of yacc.c  */
-#line 187 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 207 "src/parse-gram.y"
         { fprintf (stderr, "%d", ((*yyvaluep).integer)); }
-/* Line 729 of yacc.c  */
-#line 1043 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1073 "src/parse-gram.c"
         break;
 
             case 24: // "%<flag>"
 
-/* Line 729 of yacc.c  */
-#line 183 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 203 "src/parse-gram.y"
         { fprintf (stderr, "%%%s", ((*yyvaluep).uniqstr)); }
-/* Line 729 of yacc.c  */
-#line 1052 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1082 "src/parse-gram.c"
         break;
 
             case 40: // "{...}"
 
-/* Line 729 of yacc.c  */
-#line 176 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 196 "src/parse-gram.y"
         { fprintf (stderr, "{\n%s\n}", ((*yyvaluep).code)); }
-/* Line 729 of yacc.c  */
-#line 1061 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1091 "src/parse-gram.c"
         break;
 
-            case 41: // "[identifier]"
+            case 42: // "[identifier]"
 
-/* Line 729 of yacc.c  */
-#line 181 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 201 "src/parse-gram.y"
         { fprintf (stderr, "[%s]", ((*yyvaluep).uniqstr)); }
-/* Line 729 of yacc.c  */
-#line 1070 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1100 "src/parse-gram.c"
         break;
 
-            case 42: // "char"
+            case 43: // "char"
 
-/* Line 729 of yacc.c  */
-#line 168 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 188 "src/parse-gram.y"
         { fputs (char_name (((*yyvaluep).character)), stderr); }
-/* Line 729 of yacc.c  */
-#line 1079 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1109 "src/parse-gram.c"
         break;
 
-            case 43: // "epilogue"
+            case 44: // "epilogue"
 
-/* Line 729 of yacc.c  */
-#line 176 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 196 "src/parse-gram.y"
         { fprintf (stderr, "{\n%s\n}", ((*yyvaluep).chars)); }
-/* Line 729 of yacc.c  */
-#line 1088 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1118 "src/parse-gram.c"
         break;
 
-            case 45: // "identifier"
+            case 46: // "identifier"
 
-/* Line 729 of yacc.c  */
-#line 180 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 200 "src/parse-gram.y"
         { fputs (((*yyvaluep).uniqstr), stderr); }
-/* Line 729 of yacc.c  */
-#line 1097 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1127 "src/parse-gram.c"
         break;
 
-            case 46: // "identifier:"
+            case 47: // "identifier:"
 
-/* Line 729 of yacc.c  */
-#line 182 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 202 "src/parse-gram.y"
         { fprintf (stderr, "%s:", ((*yyvaluep).uniqstr)); }
-/* Line 729 of yacc.c  */
-#line 1106 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1136 "src/parse-gram.c"
         break;
 
-            case 49: // "%{...%}"
+            case 50: // "%{...%}"
 
-/* Line 729 of yacc.c  */
-#line 176 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 196 "src/parse-gram.y"
         { fprintf (stderr, "{\n%s\n}", ((*yyvaluep).chars)); }
-/* Line 729 of yacc.c  */
-#line 1115 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1145 "src/parse-gram.c"
         break;
 
-            case 51: // "<tag>"
+            case 52: // "<tag>"
 
-/* Line 729 of yacc.c  */
-#line 184 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 204 "src/parse-gram.y"
         { fprintf (stderr, "<%s>", ((*yyvaluep).uniqstr)); }
-/* Line 729 of yacc.c  */
-#line 1124 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1154 "src/parse-gram.c"
         break;
 
-            case 54: // "%param"
+            case 55: // "%param"
 
-/* Line 729 of yacc.c  */
-#line 230 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 250 "src/parse-gram.y"
         {
   switch (((*yyvaluep).param))
     {
@@ -1139,84 +1169,84 @@ yy_symbol_value_print (yyoutput, yytype, yyvaluep, yylocationp)
       case param_none: aver (false); break;
     }
 }
-/* Line 729 of yacc.c  */
-#line 1144 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1174 "src/parse-gram.c"
         break;
 
-            case 71: // symbol.prec
+            case 72: // symbol.prec
 
-/* Line 729 of yacc.c  */
-#line 190 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 210 "src/parse-gram.y"
         { fprintf (stderr, "%s", ((*yyvaluep).symbol)->tag); }
-/* Line 729 of yacc.c  */
-#line 1153 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1183 "src/parse-gram.c"
         break;
 
-            case 84: // variable
+            case 85: // variable
 
-/* Line 729 of yacc.c  */
-#line 180 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 200 "src/parse-gram.y"
         { fputs (((*yyvaluep).uniqstr), stderr); }
-/* Line 729 of yacc.c  */
-#line 1162 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1192 "src/parse-gram.c"
         break;
 
-            case 85: // content.opt
+            case 86: // content.opt
 
-/* Line 729 of yacc.c  */
-#line 176 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 196 "src/parse-gram.y"
         { fprintf (stderr, "{\n%s\n}", ((*yyvaluep).chars)); }
-/* Line 729 of yacc.c  */
-#line 1171 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1201 "src/parse-gram.c"
         break;
 
-            case 86: // braceless
+            case 87: // braceless
 
-/* Line 729 of yacc.c  */
-#line 176 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 196 "src/parse-gram.y"
         { fprintf (stderr, "{\n%s\n}", ((*yyvaluep).chars)); }
-/* Line 729 of yacc.c  */
-#line 1180 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1210 "src/parse-gram.c"
         break;
 
-            case 87: // id
+            case 88: // id
 
-/* Line 729 of yacc.c  */
-#line 190 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 210 "src/parse-gram.y"
         { fprintf (stderr, "%s", ((*yyvaluep).symbol)->tag); }
-/* Line 729 of yacc.c  */
-#line 1189 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1219 "src/parse-gram.c"
         break;
 
-            case 88: // id_colon
+            case 89: // id_colon
 
-/* Line 729 of yacc.c  */
-#line 191 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 211 "src/parse-gram.y"
         { fprintf (stderr, "%s:", ((*yyvaluep).symbol)->tag); }
-/* Line 729 of yacc.c  */
-#line 1198 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1228 "src/parse-gram.c"
         break;
 
-            case 89: // symbol
+            case 90: // symbol
 
-/* Line 729 of yacc.c  */
-#line 190 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 210 "src/parse-gram.y"
         { fprintf (stderr, "%s", ((*yyvaluep).symbol)->tag); }
-/* Line 729 of yacc.c  */
-#line 1207 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1237 "src/parse-gram.c"
         break;
 
-            case 90: // string_as_id
+            case 91: // string_as_id
 
-/* Line 729 of yacc.c  */
-#line 190 "src/parse-gram.y"
+/* Line 754 of yacc.c  */
+#line 210 "src/parse-gram.y"
         { fprintf (stderr, "%s", ((*yyvaluep).symbol)->tag); }
-/* Line 729 of yacc.c  */
-#line 1216 "src/parse-gram.c"
+/* Line 754 of yacc.c  */
+#line 1246 "src/parse-gram.c"
         break;
 
       default:
-	break;
+        break;
     }
 }
 
@@ -1274,10 +1304,10 @@ yy_stack_print (yybottom, yytop)
   YYFPRINTF (stderr, "\n");
 }
 
-# define YY_STACK_PRINT(Bottom, Top)				\
-do {								\
-  if (yydebug)							\
-    yy_stack_print ((Bottom), (Top));				\
+# define YY_STACK_PRINT(Bottom, Top)                            \
+do {                                                            \
+  if (yydebug)                                                  \
+    yy_stack_print ((Bottom), (Top));                           \
 } while (YYID (0))
 
 
@@ -1315,9 +1345,9 @@ yy_reduce_print (yyssp, yyvsp, yylsp, yyrule)
     }
 }
 
-# define YY_REDUCE_PRINT(Rule)		\
-do {					\
-  if (yydebug)				\
+# define YY_REDUCE_PRINT(Rule)          \
+do {                                    \
+  if (yydebug)                          \
     yy_reduce_print (yyssp, yyvsp, yylsp, Rule); \
 } while (YYID (0))
 
@@ -1333,7 +1363,7 @@ int yydebug;
 
 
 /* YYINITDEPTH -- initial size of the parser's stacks.  */
-#ifndef	YYINITDEPTH
+#ifndef YYINITDEPTH
 # define YYINITDEPTH 200
 #endif
 
@@ -1348,7 +1378,239 @@ int yydebug;
 # define YYMAXDEPTH 10000
 #endif
 
-
+/* Given a state stack such that *YYBOTTOM is its bottom, such that
+   *YYTOP is either its top or is YYTOP_EMPTY to indicate an empty
+   stack, and such that *YYCAPACITY is the maximum number of elements it
+   can hold without a reallocation, make sure there is enough room to
+   store YYADD more elements.  If not, allocate a new stack using
+   YYSTACK_ALLOC, copy the existing elements, and adjust *YYBOTTOM,
+   *YYTOP, and *YYCAPACITY to reflect the new capacity and memory
+   location.  If *YYBOTTOM != YYBOTTOM_NO_FREE, then free the old stack
+   using YYSTACK_FREE.  Return 0 if successful or if no reallocation is
+   required.  Return 1 if memory is exhausted.  */
+static int
+yy_lac_stack_realloc (YYSIZE_T *yycapacity, YYSIZE_T yyadd,
+#if YYDEBUG
+                      char const *yydebug_prefix,
+                      char const *yydebug_suffix,
+#endif
+                      yytype_int16 **yybottom,
+                      yytype_int16 *yybottom_no_free,
+                      yytype_int16 **yytop, yytype_int16 *yytop_empty)
+{
+  YYSIZE_T yysize_old =
+    *yytop == yytop_empty ? 0 : *yytop - *yybottom + 1;
+  YYSIZE_T yysize_new = yysize_old + yyadd;
+  if (*yycapacity < yysize_new)
+    {
+      YYSIZE_T yyalloc = 2 * yysize_new;
+      yytype_int16 *yybottom_new;
+      /* Use YYMAXDEPTH for maximum stack size given that the stack
+         should never need to grow larger than the main state stack
+         needs to grow without LAC.  */
+      if (YYMAXDEPTH < yysize_new)
+        {
+          YYDPRINTF ((stderr, "%smax size exceeded%s", yydebug_prefix,
+                      yydebug_suffix));
+          return 1;
+        }
+      if (YYMAXDEPTH < yyalloc)
+        yyalloc = YYMAXDEPTH;
+      yybottom_new =
+        (yytype_int16*) YYSTACK_ALLOC (yyalloc * sizeof *yybottom_new);
+      if (!yybottom_new)
+        {
+          YYDPRINTF ((stderr, "%srealloc failed%s", yydebug_prefix,
+                      yydebug_suffix));
+          return 1;
+        }
+      if (*yytop != yytop_empty)
+        {
+          YYCOPY (yybottom_new, *yybottom, yysize_old);
+          *yytop = yybottom_new + (yysize_old - 1);
+        }
+      if (*yybottom != yybottom_no_free)
+        YYSTACK_FREE (*yybottom);
+      *yybottom = yybottom_new;
+      *yycapacity = yyalloc;
+    }
+  return 0;
+}
+
+/* Establish the initial context for the current lookahead if no initial
+   context is currently established.
+
+   We define a context as a snapshot of the parser stacks.  We define
+   the initial context for a lookahead as the context in which the
+   parser initially examines that lookahead in order to select a
+   syntactic action.  Thus, if the lookahead eventually proves
+   syntactically unacceptable (possibly in a later context reached via a
+   series of reductions), the initial context can be used to determine
+   the exact set of tokens that would be syntactically acceptable in the
+   lookahead's place.  Moreover, it is the context after which any
+   further semantic actions would be erroneous because they would be
+   determined by a syntactically unacceptable token.
+
+   YY_LAC_ESTABLISH should be invoked when a reduction is about to be
+   performed in an inconsistent state (which, for the purposes of LAC,
+   includes consistent states that don't know they're consistent because
+   their default reductions have been disabled).  Iff there is a
+   lookahead token, it should also be invoked before reporting a syntax
+   error.  This latter case is for the sake of the debugging output.
+
+   For parse.lac=full, the implementation of YY_LAC_ESTABLISH is as
+   follows.  If no initial context is currently established for the
+   current lookahead, then check if that lookahead can eventually be
+   shifted if syntactic actions continue from the current context.
+   Report a syntax error if it cannot.  */
+#define YY_LAC_ESTABLISH                                         \
+do {                                                             \
+  if (!yy_lac_established)                                       \
+    {                                                            \
+      YYDPRINTF ((stderr,                                        \
+                  "LAC: initial context established for %s\n",   \
+                  yytname[yytoken]));                            \
+      yy_lac_established = 1;                                    \
+      {                                                          \
+        int yy_lac_status =                                      \
+          yy_lac (yyesa, &yyes, &yyes_capacity, yyssp, yytoken); \
+        if (yy_lac_status == 2)                                  \
+          goto yyexhaustedlab;                                   \
+        if (yy_lac_status == 1)                                  \
+          goto yyerrlab;                                         \
+      }                                                          \
+    }                                                            \
+} while (YYID (0))
+
+/* Discard any previous initial lookahead context because of Event,
+   which may be a lookahead change or an invalidation of the currently
+   established initial context for the current lookahead.
+
+   The most common example of a lookahead change is a shift.  An example
+   of both cases is syntax error recovery.  That is, a syntax error
+   occurs when the lookahead is syntactically erroneous for the
+   currently established initial context, so error recovery manipulates
+   the parser stacks to try to find a new initial context in which the
+   current lookahead is syntactically acceptable.  If it fails to find
+   such a context, it discards the lookahead.  */
+#if YYDEBUG
+# define YY_LAC_DISCARD(Event)                                           \
+do {                                                                     \
+  if (yy_lac_established)                                                \
+    {                                                                    \
+      if (yydebug)                                                       \
+        YYFPRINTF (stderr, "LAC: initial context discarded due to "      \
+                   Event "\n");                                          \
+      yy_lac_established = 0;                                            \
+    }                                                                    \
+} while (YYID (0))
+#else
+# define YY_LAC_DISCARD(Event) yy_lac_established = 0
+#endif
+
+/* Given the stack whose top is *YYSSP, return 0 iff YYTOKEN can
+   eventually (after perhaps some reductions) be shifted, return 1 if
+   not, or return 2 if memory is exhausted.  As preconditions and
+   postconditions: *YYES_CAPACITY is the allocated size of the array to
+   which *YYES points, and either *YYES = YYESA or *YYES points to an
+   array allocated with YYSTACK_ALLOC.  yy_lac may overwrite the
+   contents of either array, alter *YYES and *YYES_CAPACITY, and free
+   any old *YYES other than YYESA.  */
+static int
+yy_lac (yytype_int16 *yyesa, yytype_int16 **yyes,
+        YYSIZE_T *yyes_capacity, yytype_int16 *yyssp, int yytoken)
+{
+  yytype_int16 *yyes_prev = yyssp;
+  yytype_int16 *yyesp = yyes_prev;
+  YYDPRINTF ((stderr, "LAC: checking lookahead %s:", yytname[yytoken]));
+  if (yytoken == YYUNDEFTOK)
+    {
+      YYDPRINTF ((stderr, " Always Err\n"));
+      return 1;
+    }
+  while (1)
+    {
+      int yyrule = yypact[*yyesp];
+      if (yypact_value_is_default (yyrule)
+          || (yyrule += yytoken) < 0 || YYLAST < yyrule
+          || yycheck[yyrule] != yytoken)
+        {
+          yyrule = yydefact[*yyesp];
+          if (yyrule == 0)
+            {
+              YYDPRINTF ((stderr, " Err\n"));
+              return 1;
+            }
+        }
+      else
+        {
+          yyrule = yytable[yyrule];
+          if (yytable_value_is_error (yyrule))
+            {
+              YYDPRINTF ((stderr, " Err\n"));
+              return 1;
+            }
+          if (0 < yyrule)
+            {
+              YYDPRINTF ((stderr, " S%d\n", yyrule));
+              return 0;
+            }
+          yyrule = -yyrule;
+        }
+      {
+        YYSIZE_T yylen = yyr2[yyrule];
+        YYDPRINTF ((stderr, " R%d", yyrule - 1));
+        if (yyesp != yyes_prev)
+          {
+            YYSIZE_T yysize = yyesp - *yyes + 1;
+            if (yylen < yysize)
+              {
+                yyesp -= yylen;
+                yylen = 0;
+              }
+            else
+              {
+                yylen -= yysize;
+                yyesp = yyes_prev;
+              }
+          }
+        if (yylen)
+          yyesp = yyes_prev -= yylen;
+      }
+      {
+        int yystate;
+        {
+          int yylhs = yyr1[yyrule] - YYNTOKENS;
+          yystate = yypgoto[yylhs] + *yyesp;
+          if (yystate < 0 || YYLAST < yystate
+              || yycheck[yystate] != *yyesp)
+            yystate = yydefgoto[yylhs];
+          else
+            yystate = yytable[yystate];
+        }
+        if (yyesp == yyes_prev)
+          {
+            yyesp = *yyes;
+            *yyesp = yystate;
+          }
+        else
+          {
+            if (yy_lac_stack_realloc (yyes_capacity, 1,
+#if YYDEBUG
+                                      " (", ")",
+#endif
+                                      yyes, yyesa, &yyesp, yyes_prev))
+              {
+                YYDPRINTF ((stderr, "\n"));
+                return 2;
+              }
+            *++yyesp = yystate;
+          }
+        YYDPRINTF ((stderr, " G%d", yystate));
+      }
+    }
+}
+
 
 #if YYERROR_VERBOSE
 
@@ -1420,27 +1682,27 @@ yytnamerr (char *yyres, const char *yystr)
       char const *yyp = yystr;
 
       for (;;)
-	switch (*++yyp)
-	  {
-	  case '\'':
-	  case ',':
-	    goto do_not_strip_quotes;
-
-	  case '\\':
-	    if (*++yyp != '\\')
-	      goto do_not_strip_quotes;
-	    /* Fall through.  */
-	  default:
-	    if (yyres)
-	      yyres[yyn] = *yyp;
-	    yyn++;
-	    break;
-
-	  case '"':
-	    if (yyres)
-	      yyres[yyn] = '\0';
-	    return yyn;
-	  }
+        switch (*++yyp)
+          {
+          case '\'':
+          case ',':
+            goto do_not_strip_quotes;
+
+          case '\\':
+            if (*++yyp != '\\')
+              goto do_not_strip_quotes;
+            /* Fall through.  */
+          default:
+            if (yyres)
+              yyres[yyn] = *yyp;
+            yyn++;
+            break;
+
+          case '"':
+            if (yyres)
+              yyres[yyn] = '\0';
+            return yyn;
+          }
     do_not_strip_quotes: ;
     }
 
@@ -1452,124 +1714,146 @@ yytnamerr (char *yyres, const char *yystr)
 # endif
 
 /* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
-   about the unexpected token YYTOKEN while in state YYSTATE.
-
-   Return 0 if *YYMSG was successfully written.  Return 1 if an ordinary
-   "syntax error" message will suffice instead.  Return 2 if *YYMSG is
-   not large enough to hold the message.  In the last case, also set
-   *YYMSG_ALLOC to either (a) the required number of bytes or (b) zero
-   if the required number of bytes is too large to store.  */
+   about the unexpected token YYTOKEN for the state stack whose top is
+   YYSSP.  In order to see if a particular token T is a
+   valid looakhead, invoke yy_lac (YYESA, YYES, YYES_CAPACITY, YYSSP, T).
+
+   Return 0 if *YYMSG was successfully written.  Return 1 if *YYMSG is
+   not large enough to hold the message.  In that case, also set
+   *YYMSG_ALLOC to the required number of bytes.  Return 2 if the
+   required number of bytes is too large to store or if
+   yy_lac returned 2.  */
 static int
 yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
-                int yystate, int yytoken)
+                yytype_int16 *yyesa, yytype_int16 **yyes,
+                YYSIZE_T *yyes_capacity, yytype_int16 *yyssp, int yytoken)
 {
-  int yyn = yypact[yystate];
-
-  if (! (YYPACT_NINF < yyn && yyn <= YYLAST))
-    return 1;
-  else
+  YYSIZE_T yysize0 = yytnamerr (YY_NULL, yytname[yytoken]);
+  YYSIZE_T yysize = yysize0;
+  YYSIZE_T yysize1;
+  enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
+  /* Internationalized format string. */
+  const char *yyformat = YY_NULL;
+  /* Arguments of yyformat. */
+  char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
+  /* Number of reported tokens (one for the "unexpected", one per
+     "expected"). */
+  int yycount = 0;
+
+  /* There are many possibilities here to consider:
+     - Assume YYFAIL is not used.  It's too flawed to consider.  See
+       <http://lists.gnu.org/archive/html/bison-patches/2009-12/msg00024.html>
+       for details.  YYERROR is fine as it does not invoke this
+       function.
+     - If this state is a consistent state with a default action, then
+       the only way this function was invoked is if the default action
+       is an error action.  In that case, don't check for expected
+       tokens because there are none.
+     - The only way there can be no lookahead present (in yychar) is if
+       this state is a consistent state with a default action.  Thus,
+       detecting the absence of a lookahead is sufficient to determine
+       that there is no unexpected or expected token to report.  In that
+       case, just report a simple "syntax error".
+     - Don't assume there isn't a lookahead just because this state is a
+       consistent state with a default action.  There might have been a
+       previous inconsistent state, consistent state with a non-default
+       action, or user semantic action that manipulated yychar.
+       In the first two cases, it might appear that the current syntax
+       error should have been detected in the previous state when yy_lac
+       was invoked.  However, at that time, there might have been a
+       different syntax error that discarded a different initial context
+       during error recovery, leaving behind the current lookahead.
+  */
+  if (yytoken != YYEMPTY)
     {
-      YYSIZE_T yysize0 = yytnamerr (0, yytname[yytoken]);
-      YYSIZE_T yysize = yysize0;
-      YYSIZE_T yysize1;
-      enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
-      /* Internationalized format string. */
-      const char *yyformat = 0;
-      /* Arguments of yyformat. */
-      char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
-
-      /* Start YYX at -YYN if negative to avoid negative indexes in
-	 YYCHECK.  In other words, skip the first -YYN actions for this
-	 state because they are default actions.  */
-      int yyxbegin = yyn < 0 ? -yyn : 0;
-
-      /* Stay within bounds of both yycheck and yytname.  */
-      int yychecklim = YYLAST - yyn + 1;
-      int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
-      /* Number of reported tokens (one for the "unexpected", one per
-         "expected"). */
-      int yycount = 0;
-      int yyx;
-
+      int yyn = yypact[*yyssp];
+      YYDPRINTF ((stderr, "Constructing syntax error message\n"));
       yyarg[yycount++] = yytname[yytoken];
-
-      for (yyx = yyxbegin; yyx < yyxend; ++yyx)
-	if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
-	    && !yytable_value_is_error (yytable[yyx + yyn]))
-	  {
-	    if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
-	      {
-		yycount = 1;
-		yysize = yysize0;
-		break;
-	      }
-	    yyarg[yycount++] = yytname[yyx];
-	    yysize1 = yysize + yytnamerr (0, yytname[yyx]);
-	    if (! (yysize <= yysize1
-		   && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
-	      {
-		/* Overflow.  */
-		*yymsg_alloc = 0;
-		return 2;
-	      }
-	    yysize = yysize1;
-	  }
-
-      switch (yycount)
+      if (!yypact_value_is_default (yyn))
         {
-#define YYCASE_(N, S)                           \
-          case N:                               \
-            yyformat = S;                       \
-          break
-          YYCASE_(1, YY_("syntax error, unexpected %s"));
-          YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
-          YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
-          YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
-          YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
-#undef YYCASE_
+          int yyx;
+
+          for (yyx = 0; yyx < YYNTOKENS; ++yyx)
+            if (yyx != YYTERROR && yyx != YYUNDEFTOK)
+              {
+                {
+                  int yy_lac_status = yy_lac (yyesa, yyes, yyes_capacity,
+                                              yyssp, yyx);
+                  if (yy_lac_status == 2)
+                    return 2;
+                  if (yy_lac_status == 1)
+                    continue;
+                }
+                if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
+                  {
+                    yycount = 1;
+                    yysize = yysize0;
+                    break;
+                  }
+                yyarg[yycount++] = yytname[yyx];
+                yysize1 = yysize + yytnamerr (YY_NULL, yytname[yyx]);
+                if (! (yysize <= yysize1
+                       && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+                  return 2;
+                yysize = yysize1;
+              }
         }
+# if YYDEBUG
+      else if (yydebug)
+        YYFPRINTF (stderr, "No expected tokens.\n");
+# endif
+    }
+
+  switch (yycount)
+    {
+# define YYCASE_(N, S)                      \
+      case N:                               \
+        yyformat = S;                       \
+      break
+      YYCASE_(0, YY_("syntax error"));
+      YYCASE_(1, YY_("syntax error, unexpected %s"));
+      YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
+      YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
+      YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
+      YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
+# undef YYCASE_
+    }
+
+  yysize1 = yysize + yystrlen (yyformat);
+  if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+    return 2;
+  yysize = yysize1;
+
+  if (*yymsg_alloc < yysize)
+    {
+      *yymsg_alloc = 2 * yysize;
+      if (! (yysize <= *yymsg_alloc
+             && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
+        *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
+      return 1;
+    }
 
-      yysize1 = yysize + yystrlen (yyformat);
-      if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
+  /* Avoid sprintf, as that infringes on the user's name space.
+     Don't have undefined behavior even if the translation
+     produced a string with the wrong number of "%s"s.  */
+  {
+    char *yyp = *yymsg;
+    int yyi = 0;
+    while ((*yyp = *yyformat) != '\0')
+      if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
         {
-          /* Overflow.  */
-          *yymsg_alloc = 0;
-          return 2;
+          yyp += yytnamerr (yyp, yyarg[yyi++]);
+          yyformat += 2;
         }
-      yysize = yysize1;
-
-      if (*yymsg_alloc < yysize)
+      else
         {
-          *yymsg_alloc = 2 * yysize;
-          if (! (yysize <= *yymsg_alloc
-                 && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
-            *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
-          return 2;
+          yyp++;
+          yyformat++;
         }
-
-      /* Avoid sprintf, as that infringes on the user's name space.
-         Don't have undefined behavior even if the translation
-         produced a string with the wrong number of "%s"s.  */
-      {
-        char *yyp = *yymsg;
-        int yyi = 0;
-        while ((*yyp = *yyformat) != '\0')
-          if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
-            {
-              yyp += yytnamerr (yyp, yyarg[yyi++]);
-              yyformat += 2;
-            }
-          else
-            {
-              yyp++;
-              yyformat++;
-            }
-      }
-      return 0;
-    }
+  }
+  return 0;
 }
 #endif /* YYERROR_VERBOSE */
-
 
 /*-----------------------------------------------.
 | Release the memory associated to this symbol.  |
@@ -1589,9 +1873,8 @@ yydestruct (yymsg, yytype, yyvaluep, yylocationp)
     YYLTYPE *yylocationp;
 #endif
 {
-  YYUSE (yyvaluep);
+  YYUSE(yyvaluep);
   YYUSE (yylocationp);
-
   if (!yymsg)
     yymsg = "Deleting";
   YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
@@ -1599,27 +1882,11 @@ yydestruct (yymsg, yytype, yyvaluep, yylocationp)
   switch (yytype)
     {
       default:
-	break;
+        break;
     }
 }
 
 
-/* Prevent warnings from -Wmissing-prototypes.  */
-#ifdef YYPARSE_PARAM
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
-int yyparse (void *YYPARSE_PARAM);
-#else
-int yyparse ();
-#endif
-#else /* ! YYPARSE_PARAM */
-#if (defined __STDC__ || defined __C99__FUNC__ \
-     || defined __cplusplus || defined _MSC_VER)
-int yyparse (void);
-#else
-int yyparse ();
-#endif
-#endif /* ! YYPARSE_PARAM */
 
 
 /*----------.
@@ -1669,7 +1936,7 @@ YYLTYPE yylloc;
        `yyvs': related to semantic values.
        `yyls': related to locations.
 
-       Refer to the stacks thru separate pointers, to allow yyoverflow
+       Refer to the stacks through separate pointers, to allow yyoverflow
        to reallocate them elsewhere.  */
 
     /* The state stack.  */
@@ -1688,10 +1955,15 @@ YYLTYPE yylloc;
     YYLTYPE *yylsp;
 
     /* The locations where the error started and ended.  */
-    YYLTYPE yyerror_range[2];
+    YYLTYPE yyerror_range[3];
 
     YYSIZE_T yystacksize;
 
+    yytype_int16 yyesa[20];
+    yytype_int16 *yyes;
+    YYSIZE_T yyes_capacity;
+
+  int yy_lac_established = 0;
   int yyn;
   int yyresult;
   /* Lookahead token as an internal (translated) token number.  */
@@ -1720,6 +1992,11 @@ YYLTYPE yylloc;
   yyls = yylsa;
   yystacksize = YYINITDEPTH;
 
+  yyes = yyesa;
+  yyes_capacity = sizeof yyesa / sizeof *yyes;
+  if (YYMAXDEPTH < yyes_capacity)
+    yyes_capacity = YYMAXDEPTH;
+
   YYDPRINTF ((stderr, "Starting parse\n"));
 
   yystate = 0;
@@ -1742,16 +2019,16 @@ YYLTYPE yylloc;
 #endif
 
 /* User initialization code.  */
-/* Line 1214 of yacc.c  */
-#line 79 "src/parse-gram.y"
+/* Line 1519 of yacc.c  */
+#line 99 "src/parse-gram.y"
 {
   /* Bison's grammar can initial empty locations, hence a default
      location is needed. */
   boundary_set (&yylloc.start, current_file, 1, 1);
   boundary_set (&yylloc.end, current_file, 1, 1);
 }
-/* Line 1214 of yacc.c  */
-#line 1755 "src/parse-gram.c"
+/* Line 1519 of yacc.c  */
+#line 2032 "src/parse-gram.c"
   yylsp[0] = yylloc;
 
   goto yysetstate;
@@ -1774,26 +2051,26 @@ YYLTYPE yylloc;
 
 #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;
-	yytype_int16 *yyss1 = yyss;
-	YYLTYPE *yyls1 = yyls;
-
-	/* 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 (YY_("memory exhausted"),
-		    &yyss1, yysize * sizeof (*yyssp),
-		    &yyvs1, yysize * sizeof (*yyvsp),
-		    &yyls1, yysize * sizeof (*yylsp),
-		    &yystacksize);
-
-	yyls = yyls1;
-	yyss = yyss1;
-	yyvs = yyvs1;
+        /* 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;
+        yytype_int16 *yyss1 = yyss;
+        YYLTYPE *yyls1 = yyls;
+
+        /* 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 (YY_("memory exhausted"),
+                    &yyss1, yysize * sizeof (*yyssp),
+                    &yyvs1, yysize * sizeof (*yyvsp),
+                    &yyls1, yysize * sizeof (*yylsp),
+                    &yystacksize);
+
+        yyls = yyls1;
+        yyss = yyss1;
+        yyvs = yyvs1;
       }
 #else /* no yyoverflow */
 # ifndef YYSTACK_RELOCATE
@@ -1801,23 +2078,23 @@ YYLTYPE yylloc;
 # else
       /* Extend the stack our own way.  */
       if (YYMAXDEPTH <= yystacksize)
-	goto yyexhaustedlab;
+        goto yyexhaustedlab;
       yystacksize *= 2;
       if (YYMAXDEPTH < yystacksize)
-	yystacksize = YYMAXDEPTH;
+        yystacksize = YYMAXDEPTH;
 
       {
-	yytype_int16 *yyss1 = yyss;
-	union yyalloc *yyptr =
-	  (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
-	if (! yyptr)
-	  goto yyexhaustedlab;
-	YYSTACK_RELOCATE (yyss_alloc, yyss);
-	YYSTACK_RELOCATE (yyvs_alloc, yyvs);
-	YYSTACK_RELOCATE (yyls_alloc, yyls);
+        yytype_int16 *yyss1 = yyss;
+        union yyalloc *yyptr =
+          (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
+        if (! yyptr)
+          goto yyexhaustedlab;
+        YYSTACK_RELOCATE (yyss_alloc, yyss);
+        YYSTACK_RELOCATE (yyvs_alloc, yyvs);
+        YYSTACK_RELOCATE (yyls_alloc, yyls);
 #  undef YYSTACK_RELOCATE
-	if (yyss1 != yyssa)
-	  YYSTACK_FREE (yyss1);
+        if (yyss1 != yyssa)
+          YYSTACK_FREE (yyss1);
       }
 # endif
 #endif /* no yyoverflow */
@@ -1827,10 +2104,10 @@ YYLTYPE yylloc;
       yylsp = yyls + yysize - 1;
 
       YYDPRINTF ((stderr, "Stack size increased to %lu\n",
-		  (unsigned long int) yystacksize));
+                  (unsigned long int) yystacksize));
 
       if (yyss + yystacksize - 1 <= yyssp)
-	YYABORT;
+        YYABORT;
     }
 
   YYDPRINTF ((stderr, "Entering state %d\n", yystate));
@@ -1877,12 +2154,16 @@ yybackup:
      detect an error, take that action.  */
   yyn += yytoken;
   if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
-    goto yydefault;
+    {
+      YY_LAC_ESTABLISH;
+      goto yydefault;
+    }
   yyn = yytable[yyn];
   if (yyn <= 0)
     {
       if (yytable_value_is_error (yyn))
-	goto yyerrlab;
+        goto yyerrlab;
+      YY_LAC_ESTABLISH;
       yyn = -yyn;
       goto yyreduce;
     }
@@ -1897,6 +2178,7 @@ yybackup:
 
   /* Discard the shifted token.  */
   yychar = YYEMPTY;
+  YY_LAC_DISCARD ("shift");
 
   yystate = yyn;
   *++yyvsp = yylval;
@@ -1934,11 +2216,13 @@ yyreduce:
   /* Default location.  */
   YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);
   YY_REDUCE_PRINT (yyn);
-  switch (yyn)
-    {
-        case 6:
-/* Line 1427 of yacc.c  */
-#line 266 "src/parse-gram.y"
+  {
+    int yychar_backup = yychar;
+    switch (yyn)
+      {
+          case 6:
+/* Line 1735 of yacc.c  */
+#line 286 "src/parse-gram.y"
     {
       code_props plain_code;
       code_props_plain_init (&plain_code, (yyvsp[0].chars), (yylsp[0]));
@@ -1948,107 +2232,107 @@ yyreduce:
                         plain_code.code, (yylsp[0]));
       code_scanner_last_string_free ();
     }
-/* Line 1427 of yacc.c  */
-#line 1953 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2237 "src/parse-gram.c"
     break;
 
   case 7:
-/* Line 1427 of yacc.c  */
-#line 276 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 296 "src/parse-gram.y"
     {
       muscle_percent_define_ensure ((yyvsp[0].uniqstr), (yylsp[0]), true);
     }
-/* Line 1427 of yacc.c  */
-#line 1963 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2247 "src/parse-gram.c"
     break;
 
   case 8:
-/* Line 1427 of yacc.c  */
-#line 280 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 300 "src/parse-gram.y"
     {
       muscle_percent_define_insert ((yyvsp[-1].uniqstr), (yylsp[-1]), (yyvsp[0].chars),
                                     MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
     }
-/* Line 1427 of yacc.c  */
-#line 1974 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2258 "src/parse-gram.c"
     break;
 
   case 9:
-/* Line 1427 of yacc.c  */
-#line 284 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 304 "src/parse-gram.y"
     { defines_flag = true; }
-/* Line 1427 of yacc.c  */
-#line 1982 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2266 "src/parse-gram.c"
     break;
 
   case 10:
-/* Line 1427 of yacc.c  */
-#line 286 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 306 "src/parse-gram.y"
     {
       defines_flag = true;
       spec_defines_file = xstrdup ((yyvsp[0].chars));
     }
-/* Line 1427 of yacc.c  */
-#line 1993 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2277 "src/parse-gram.c"
     break;
 
   case 11:
-/* Line 1427 of yacc.c  */
-#line 291 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 311 "src/parse-gram.y"
     {
       muscle_percent_define_insert ("parse.error", (yylsp[0]), "verbose",
                                     MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
     }
-/* Line 1427 of yacc.c  */
-#line 2004 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2288 "src/parse-gram.c"
     break;
 
   case 12:
-/* Line 1427 of yacc.c  */
-#line 295 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 315 "src/parse-gram.y"
     { expected_sr_conflicts = (yyvsp[0].integer); }
-/* Line 1427 of yacc.c  */
-#line 2012 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2296 "src/parse-gram.c"
     break;
 
   case 13:
-/* Line 1427 of yacc.c  */
-#line 296 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 316 "src/parse-gram.y"
     { expected_rr_conflicts = (yyvsp[0].integer); }
-/* Line 1427 of yacc.c  */
-#line 2020 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2304 "src/parse-gram.c"
     break;
 
   case 14:
-/* Line 1427 of yacc.c  */
-#line 297 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 317 "src/parse-gram.y"
     { spec_file_prefix = (yyvsp[0].chars); }
-/* Line 1427 of yacc.c  */
-#line 2028 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2312 "src/parse-gram.c"
     break;
 
   case 15:
-/* Line 1427 of yacc.c  */
-#line 298 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 318 "src/parse-gram.y"
     { spec_file_prefix = (yyvsp[0].chars); }
-/* Line 1427 of yacc.c  */
-#line 2036 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2320 "src/parse-gram.c"
     break;
 
   case 16:
-/* Line 1427 of yacc.c  */
-#line 300 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 320 "src/parse-gram.y"
     {
       nondeterministic_parser = true;
       glr_parser = true;
     }
-/* Line 1427 of yacc.c  */
-#line 2047 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2331 "src/parse-gram.c"
     break;
 
   case 17:
-/* Line 1427 of yacc.c  */
-#line 305 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 325 "src/parse-gram.y"
     {
       code_props action;
       code_props_symbol_action_init (&action, (yyvsp[0].code), (yylsp[0]));
@@ -2057,93 +2341,93 @@ yyreduce:
       muscle_code_grow ("initial_action", action.code, (yylsp[0]));
       code_scanner_last_string_free ();
     }
-/* Line 1427 of yacc.c  */
-#line 2062 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2346 "src/parse-gram.c"
     break;
 
   case 18:
-/* Line 1427 of yacc.c  */
-#line 313 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 333 "src/parse-gram.y"
     { language_argmatch ((yyvsp[0].chars), grammar_prio, (yylsp[-1])); }
-/* Line 1427 of yacc.c  */
-#line 2070 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2354 "src/parse-gram.c"
     break;
 
   case 19:
-/* Line 1427 of yacc.c  */
-#line 314 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 334 "src/parse-gram.y"
     { spec_name_prefix = (yyvsp[0].chars); }
-/* Line 1427 of yacc.c  */
-#line 2078 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2362 "src/parse-gram.c"
     break;
 
   case 20:
-/* Line 1427 of yacc.c  */
-#line 315 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 335 "src/parse-gram.y"
     { spec_name_prefix = (yyvsp[0].chars); }
-/* Line 1427 of yacc.c  */
-#line 2086 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2370 "src/parse-gram.c"
     break;
 
   case 21:
-/* Line 1427 of yacc.c  */
-#line 316 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 336 "src/parse-gram.y"
     { no_lines_flag = true; }
-/* Line 1427 of yacc.c  */
-#line 2094 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2378 "src/parse-gram.c"
     break;
 
   case 22:
-/* Line 1427 of yacc.c  */
-#line 317 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 337 "src/parse-gram.y"
     { nondeterministic_parser = true; }
-/* Line 1427 of yacc.c  */
-#line 2102 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2386 "src/parse-gram.c"
     break;
 
   case 23:
-/* Line 1427 of yacc.c  */
-#line 318 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 338 "src/parse-gram.y"
     { spec_outfile = (yyvsp[0].chars); }
-/* Line 1427 of yacc.c  */
-#line 2110 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2394 "src/parse-gram.c"
     break;
 
   case 24:
-/* Line 1427 of yacc.c  */
-#line 319 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 339 "src/parse-gram.y"
     { spec_outfile = (yyvsp[0].chars); }
-/* Line 1427 of yacc.c  */
-#line 2118 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2402 "src/parse-gram.c"
     break;
 
   case 25:
-/* Line 1427 of yacc.c  */
-#line 320 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 340 "src/parse-gram.y"
     { current_param = (yyvsp[0].param); }
-/* Line 1427 of yacc.c  */
-#line 2126 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2410 "src/parse-gram.c"
     break;
 
   case 26:
-/* Line 1427 of yacc.c  */
-#line 320 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 340 "src/parse-gram.y"
     { current_param = param_none; }
-/* Line 1427 of yacc.c  */
-#line 2134 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2418 "src/parse-gram.c"
     break;
 
   case 27:
-/* Line 1427 of yacc.c  */
-#line 321 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 341 "src/parse-gram.y"
     { version_check (&(yylsp[0]), (yyvsp[0].chars)); }
-/* Line 1427 of yacc.c  */
-#line 2142 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2426 "src/parse-gram.c"
     break;
 
   case 28:
-/* Line 1427 of yacc.c  */
-#line 323 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 343 "src/parse-gram.y"
     {
       char const *skeleton_user = (yyvsp[0].chars);
       if (strchr (skeleton_user, '/'))
@@ -2158,7 +2442,7 @@ yyreduce:
             xmalloc (dir_length + 1 + strlen (skeleton_user) + 1);
           if (dir_length > 0)
             {
-              strncpy (skeleton_build, current_file, dir_length);
+              memcpy (skeleton_build, current_file, dir_length);
               skeleton_build[dir_length++] = '/';
             }
           strcpy (skeleton_build + dir_length, skeleton_user);
@@ -2167,558 +2451,576 @@ yyreduce:
         }
       skeleton_arg (skeleton_user, grammar_prio, (yylsp[-1]));
     }
-/* Line 1427 of yacc.c  */
-#line 2172 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2456 "src/parse-gram.c"
     break;
 
   case 29:
-/* Line 1427 of yacc.c  */
-#line 346 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 366 "src/parse-gram.y"
     { token_table_flag = true; }
-/* Line 1427 of yacc.c  */
-#line 2180 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2464 "src/parse-gram.c"
     break;
 
   case 30:
-/* Line 1427 of yacc.c  */
-#line 347 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 367 "src/parse-gram.y"
     { report_flag |= report_states; }
-/* Line 1427 of yacc.c  */
-#line 2188 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2472 "src/parse-gram.c"
     break;
 
   case 31:
-/* Line 1427 of yacc.c  */
-#line 348 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 368 "src/parse-gram.y"
     { yacc_flag = true; }
-/* Line 1427 of yacc.c  */
-#line 2196 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2480 "src/parse-gram.c"
     break;
 
   case 33:
-/* Line 1427 of yacc.c  */
-#line 353 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 373 "src/parse-gram.y"
     { add_param (current_param, (yyvsp[0].code), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2204 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2488 "src/parse-gram.c"
     break;
 
   case 34:
-/* Line 1427 of yacc.c  */
-#line 354 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 374 "src/parse-gram.y"
     { add_param (current_param, (yyvsp[0].code), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2212 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2496 "src/parse-gram.c"
     break;
 
   case 37:
-/* Line 1427 of yacc.c  */
-#line 366 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 386 "src/parse-gram.y"
     {
       grammar_start_symbol_set ((yyvsp[0].symbol), (yylsp[0]));
     }
-/* Line 1427 of yacc.c  */
-#line 2222 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2506 "src/parse-gram.c"
     break;
 
   case 38:
-/* Line 1427 of yacc.c  */
-#line 370 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 390 "src/parse-gram.y"
     {
       symbol_list *list;
       for (list = (yyvsp[0].list); list; list = list->next)
-	symbol_list_destructor_set (list, (yyvsp[-1].code), (yylsp[-1]));
+        symbol_list_code_props_set (list, destructor, (yylsp[-1]), (yyvsp[-1].code));
       symbol_list_free ((yyvsp[0].list));
     }
-/* Line 1427 of yacc.c  */
-#line 2235 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2519 "src/parse-gram.c"
     break;
 
   case 39:
-/* Line 1427 of yacc.c  */
-#line 377 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 397 "src/parse-gram.y"
     {
       symbol_list *list;
       for (list = (yyvsp[0].list); list; list = list->next)
-	symbol_list_printer_set (list, (yyvsp[-1].code), (yylsp[-1]));
+        symbol_list_code_props_set (list, printer, (yylsp[-1]), (yyvsp[-1].code));
       symbol_list_free ((yyvsp[0].list));
     }
-/* Line 1427 of yacc.c  */
-#line 2248 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2532 "src/parse-gram.c"
     break;
 
   case 40:
-/* Line 1427 of yacc.c  */
-#line 384 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 404 "src/parse-gram.y"
     {
       default_prec = true;
     }
-/* Line 1427 of yacc.c  */
-#line 2258 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2542 "src/parse-gram.c"
     break;
 
   case 41:
-/* Line 1427 of yacc.c  */
-#line 388 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 408 "src/parse-gram.y"
     {
       default_prec = false;
     }
-/* Line 1427 of yacc.c  */
-#line 2268 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2552 "src/parse-gram.c"
     break;
 
   case 42:
-/* Line 1427 of yacc.c  */
-#line 392 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 412 "src/parse-gram.y"
     {
       /* Do not invoke muscle_percent_code_grow here since it invokes
          muscle_user_name_list_grow.  */
       muscle_code_grow ("percent_code()", (yyvsp[0].chars), (yylsp[0]));
       code_scanner_last_string_free ();
     }
-/* Line 1427 of yacc.c  */
-#line 2281 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2565 "src/parse-gram.c"
     break;
 
   case 43:
-/* Line 1427 of yacc.c  */
-#line 399 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 419 "src/parse-gram.y"
     {
       muscle_percent_code_grow ((yyvsp[-1].uniqstr), (yylsp[-1]), (yyvsp[0].chars), (yylsp[0]));
       code_scanner_last_string_free ();
     }
-/* Line 1427 of yacc.c  */
-#line 2292 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2576 "src/parse-gram.c"
     break;
 
   case 44:
-/* Line 1427 of yacc.c  */
-#line 413 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 433 "src/parse-gram.y"
     {}
-/* Line 1427 of yacc.c  */
-#line 2300 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2584 "src/parse-gram.c"
     break;
 
   case 45:
-/* Line 1427 of yacc.c  */
-#line 414 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 434 "src/parse-gram.y"
     { muscle_code_grow ("union_name", (yyvsp[0].uniqstr), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2308 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2592 "src/parse-gram.c"
     break;
 
   case 46:
-/* Line 1427 of yacc.c  */
-#line 419 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 439 "src/parse-gram.y"
     {
       union_seen = true;
       muscle_code_grow ("stype", (yyvsp[0].chars), (yylsp[0]));
       code_scanner_last_string_free ();
     }
-/* Line 1427 of yacc.c  */
-#line 2320 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2604 "src/parse-gram.c"
     break;
 
   case 47:
-/* Line 1427 of yacc.c  */
-#line 430 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 450 "src/parse-gram.y"
     { current_class = nterm_sym; }
-/* Line 1427 of yacc.c  */
-#line 2328 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2612 "src/parse-gram.c"
     break;
 
   case 48:
-/* Line 1427 of yacc.c  */
-#line 431 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 451 "src/parse-gram.y"
     {
       current_class = unknown_sym;
       current_type = NULL;
     }
-/* Line 1427 of yacc.c  */
-#line 2339 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2623 "src/parse-gram.c"
     break;
 
   case 49:
-/* Line 1427 of yacc.c  */
-#line 435 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 455 "src/parse-gram.y"
     { current_class = token_sym; }
-/* Line 1427 of yacc.c  */
-#line 2347 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2631 "src/parse-gram.c"
     break;
 
   case 50:
-/* Line 1427 of yacc.c  */
-#line 436 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 456 "src/parse-gram.y"
     {
       current_class = unknown_sym;
       current_type = NULL;
     }
-/* Line 1427 of yacc.c  */
-#line 2358 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2642 "src/parse-gram.c"
     break;
 
   case 51:
-/* Line 1427 of yacc.c  */
-#line 441 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 461 "src/parse-gram.y"
     {
       symbol_list *list;
       tag_seen = true;
       for (list = (yyvsp[0].list); list; list = list->next)
-	symbol_type_set (list->content.sym, (yyvsp[-1].uniqstr), (yylsp[-1]));
+        symbol_type_set (list->content.sym, (yyvsp[-1].uniqstr), (yylsp[-1]));
       symbol_list_free ((yyvsp[0].list));
     }
-/* Line 1427 of yacc.c  */
-#line 2372 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2656 "src/parse-gram.c"
     break;
 
   case 52:
-/* Line 1427 of yacc.c  */
-#line 452 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 472 "src/parse-gram.y"
     {
       symbol_list *list;
       ++current_prec;
       for (list = (yyvsp[0].list); list; list = list->next)
-	{
-	  symbol_type_set (list->content.sym, current_type, (yylsp[-1]));
-	  symbol_precedence_set (list->content.sym, current_prec, (yyvsp[-2].assoc), (yylsp[-2]));
-	}
+        {
+          symbol_type_set (list->content.sym, current_type, (yylsp[-1]));
+          symbol_precedence_set (list->content.sym, current_prec, (yyvsp[-2].assoc), (yylsp[-2]));
+        }
       symbol_list_free ((yyvsp[0].list));
       current_type = NULL;
     }
-/* Line 1427 of yacc.c  */
-#line 2390 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2674 "src/parse-gram.c"
     break;
 
   case 53:
-/* Line 1427 of yacc.c  */
-#line 466 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 486 "src/parse-gram.y"
     { (yyval.assoc) = left_assoc; }
-/* Line 1427 of yacc.c  */
-#line 2398 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2682 "src/parse-gram.c"
     break;
 
   case 54:
-/* Line 1427 of yacc.c  */
-#line 467 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 487 "src/parse-gram.y"
     { (yyval.assoc) = right_assoc; }
-/* Line 1427 of yacc.c  */
-#line 2406 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2690 "src/parse-gram.c"
     break;
 
   case 55:
-/* Line 1427 of yacc.c  */
-#line 468 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 488 "src/parse-gram.y"
     { (yyval.assoc) = non_assoc; }
-/* Line 1427 of yacc.c  */
-#line 2414 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2698 "src/parse-gram.c"
     break;
 
   case 56:
-/* Line 1427 of yacc.c  */
-#line 469 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 489 "src/parse-gram.y"
     { (yyval.assoc) = precedence_assoc; }
-/* Line 1427 of yacc.c  */
-#line 2422 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2706 "src/parse-gram.c"
     break;
 
   case 57:
-/* Line 1427 of yacc.c  */
-#line 473 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 493 "src/parse-gram.y"
     { current_type = NULL; }
-/* Line 1427 of yacc.c  */
-#line 2430 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2714 "src/parse-gram.c"
     break;
 
   case 58:
-/* Line 1427 of yacc.c  */
-#line 474 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 494 "src/parse-gram.y"
     { current_type = (yyvsp[0].uniqstr); tag_seen = true; }
-/* Line 1427 of yacc.c  */
-#line 2438 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2722 "src/parse-gram.c"
     break;
 
   case 59:
-/* Line 1427 of yacc.c  */
-#line 480 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 500 "src/parse-gram.y"
     { (yyval.list) = symbol_list_sym_new ((yyvsp[0].symbol), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2446 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2730 "src/parse-gram.c"
     break;
 
   case 60:
-/* Line 1427 of yacc.c  */
-#line 482 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 502 "src/parse-gram.y"
     { (yyval.list) = symbol_list_prepend ((yyvsp[-1].list), symbol_list_sym_new ((yyvsp[0].symbol), (yylsp[0]))); }
-/* Line 1427 of yacc.c  */
-#line 2454 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2738 "src/parse-gram.c"
     break;
 
   case 61:
-/* Line 1427 of yacc.c  */
-#line 486 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 506 "src/parse-gram.y"
     { (yyval.symbol) = (yyvsp[0].symbol); }
-/* Line 1427 of yacc.c  */
-#line 2462 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2746 "src/parse-gram.c"
     break;
 
   case 62:
-/* Line 1427 of yacc.c  */
-#line 487 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 507 "src/parse-gram.y"
     { (yyval.symbol) = (yyvsp[-1].symbol); symbol_user_token_number_set ((yyvsp[-1].symbol), (yyvsp[0].integer), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2470 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2754 "src/parse-gram.c"
     break;
 
   case 63:
-/* Line 1427 of yacc.c  */
-#line 493 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 513 "src/parse-gram.y"
     { (yyval.list) = symbol_list_sym_new ((yyvsp[0].symbol), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2478 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2762 "src/parse-gram.c"
     break;
 
   case 64:
-/* Line 1427 of yacc.c  */
-#line 495 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 515 "src/parse-gram.y"
     { (yyval.list) = symbol_list_prepend ((yyvsp[-1].list), symbol_list_sym_new ((yyvsp[0].symbol), (yylsp[0]))); }
-/* Line 1427 of yacc.c  */
-#line 2486 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2770 "src/parse-gram.c"
     break;
 
   case 65:
-/* Line 1427 of yacc.c  */
-#line 499 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 519 "src/parse-gram.y"
     { (yyval.list) = (yyvsp[0].list); }
-/* Line 1427 of yacc.c  */
-#line 2494 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2778 "src/parse-gram.c"
     break;
 
   case 66:
-/* Line 1427 of yacc.c  */
-#line 500 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 520 "src/parse-gram.y"
     { (yyval.list) = symbol_list_prepend ((yyvsp[-1].list), (yyvsp[0].list)); }
-/* Line 1427 of yacc.c  */
-#line 2502 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2786 "src/parse-gram.c"
     break;
 
   case 67:
-/* Line 1427 of yacc.c  */
-#line 504 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 524 "src/parse-gram.y"
     { (yyval.list) = symbol_list_sym_new ((yyvsp[0].symbol), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2510 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2794 "src/parse-gram.c"
     break;
 
   case 68:
-/* Line 1427 of yacc.c  */
-#line 505 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 525 "src/parse-gram.y"
     { (yyval.list) = symbol_list_type_new ((yyvsp[0].uniqstr), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2518 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2802 "src/parse-gram.c"
     break;
 
   case 69:
-/* Line 1427 of yacc.c  */
-#line 506 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 526 "src/parse-gram.y"
     { (yyval.list) = symbol_list_default_tagged_new ((yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2526 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2810 "src/parse-gram.c"
     break;
 
   case 70:
-/* Line 1427 of yacc.c  */
-#line 507 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 527 "src/parse-gram.y"
     { (yyval.list) = symbol_list_default_tagless_new ((yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2534 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2818 "src/parse-gram.c"
     break;
 
   case 71:
-/* Line 1427 of yacc.c  */
-#line 513 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 533 "src/parse-gram.y"
     {
        current_type = (yyvsp[0].uniqstr);
        tag_seen = true;
      }
-/* Line 1427 of yacc.c  */
-#line 2545 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2829 "src/parse-gram.c"
     break;
 
   case 72:
-/* Line 1427 of yacc.c  */
-#line 518 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 538 "src/parse-gram.y"
     {
        symbol_class_set ((yyvsp[0].symbol), current_class, (yylsp[0]), true);
        symbol_type_set ((yyvsp[0].symbol), current_type, (yylsp[0]));
      }
-/* Line 1427 of yacc.c  */
-#line 2556 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2840 "src/parse-gram.c"
     break;
 
   case 73:
-/* Line 1427 of yacc.c  */
-#line 523 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 543 "src/parse-gram.y"
     {
       symbol_class_set ((yyvsp[-1].symbol), current_class, (yylsp[-1]), true);
       symbol_type_set ((yyvsp[-1].symbol), current_type, (yylsp[-1]));
       symbol_user_token_number_set ((yyvsp[-1].symbol), (yyvsp[0].integer), (yylsp[0]));
     }
-/* Line 1427 of yacc.c  */
-#line 2568 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2852 "src/parse-gram.c"
     break;
 
   case 74:
-/* Line 1427 of yacc.c  */
-#line 529 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 549 "src/parse-gram.y"
     {
       symbol_class_set ((yyvsp[-1].symbol), current_class, (yylsp[-1]), true);
       symbol_type_set ((yyvsp[-1].symbol), current_type, (yylsp[-1]));
       symbol_make_alias ((yyvsp[-1].symbol), (yyvsp[0].symbol), (yyloc));
     }
-/* Line 1427 of yacc.c  */
-#line 2580 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2864 "src/parse-gram.c"
     break;
 
   case 75:
-/* Line 1427 of yacc.c  */
-#line 535 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 555 "src/parse-gram.y"
     {
       symbol_class_set ((yyvsp[-2].symbol), current_class, (yylsp[-2]), true);
       symbol_type_set ((yyvsp[-2].symbol), current_type, (yylsp[-2]));
       symbol_user_token_number_set ((yyvsp[-2].symbol), (yyvsp[-1].integer), (yylsp[-1]));
       symbol_make_alias ((yyvsp[-2].symbol), (yyvsp[0].symbol), (yyloc));
     }
-/* Line 1427 of yacc.c  */
-#line 2593 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2877 "src/parse-gram.c"
     break;
 
   case 82:
-/* Line 1427 of yacc.c  */
-#line 565 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 585 "src/parse-gram.y"
     {
       yyerrok;
     }
-/* Line 1427 of yacc.c  */
-#line 2603 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2887 "src/parse-gram.c"
     break;
 
   case 83:
-/* Line 1427 of yacc.c  */
-#line 571 "src/parse-gram.y"
-    { current_lhs = (yyvsp[-1].symbol); current_lhs_location = (yylsp[-1]);
-    current_lhs_named_ref = (yyvsp[0].named_ref); }
-/* Line 1427 of yacc.c  */
-#line 2612 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 591 "src/parse-gram.y"
+    { current_lhs ((yyvsp[-1].symbol), (yylsp[-1]), (yyvsp[0].named_ref)); }
+/* Line 1735 of yacc.c  */
+#line 2895 "src/parse-gram.c"
+    break;
+
+  case 84:
+/* Line 1735 of yacc.c  */
+#line 592 "src/parse-gram.y"
+    {
+    /* Free the current lhs. */
+    current_lhs (0, (yylsp[-3]), 0);
+  }
+/* Line 1735 of yacc.c  */
+#line 2906 "src/parse-gram.c"
     break;
 
   case 85:
-/* Line 1427 of yacc.c  */
-#line 576 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 599 "src/parse-gram.y"
     { grammar_current_rule_end ((yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2620 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2914 "src/parse-gram.c"
     break;
 
   case 86:
-/* Line 1427 of yacc.c  */
-#line 577 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 600 "src/parse-gram.y"
     { grammar_current_rule_end ((yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2628 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2922 "src/parse-gram.c"
     break;
 
   case 88:
-/* Line 1427 of yacc.c  */
-#line 583 "src/parse-gram.y"
-    { grammar_current_rule_begin (current_lhs, current_lhs_location,
-				  current_lhs_named_ref); }
-/* Line 1427 of yacc.c  */
-#line 2637 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 606 "src/parse-gram.y"
+    { grammar_current_rule_begin (current_lhs_symbol, current_lhs_location,
+                                  current_lhs_named_ref); }
+/* Line 1735 of yacc.c  */
+#line 2931 "src/parse-gram.c"
     break;
 
   case 89:
-/* Line 1427 of yacc.c  */
-#line 586 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 609 "src/parse-gram.y"
     { grammar_current_rule_symbol_append ((yyvsp[-1].symbol), (yylsp[-1]), (yyvsp[0].named_ref)); }
-/* Line 1427 of yacc.c  */
-#line 2645 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2939 "src/parse-gram.c"
     break;
 
   case 90:
-/* Line 1427 of yacc.c  */
-#line 588 "src/parse-gram.y"
-    { grammar_current_rule_action_append ((yyvsp[-1].code), (yylsp[-1]), (yyvsp[0].named_ref)); }
-/* Line 1427 of yacc.c  */
-#line 2653 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 611 "src/parse-gram.y"
+    { grammar_current_rule_action_append ((yyvsp[-1].code), (yylsp[-1]), (yyvsp[0].named_ref), false); }
+/* Line 1735 of yacc.c  */
+#line 2947 "src/parse-gram.c"
     break;
 
   case 91:
-/* Line 1427 of yacc.c  */
-#line 590 "src/parse-gram.y"
-    { grammar_current_rule_prec_set ((yyvsp[0].symbol), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2661 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 613 "src/parse-gram.y"
+    { grammar_current_rule_action_append ((yyvsp[0].code), (yylsp[0]), NULL, true); }
+/* Line 1735 of yacc.c  */
+#line 2955 "src/parse-gram.c"
     break;
 
   case 92:
-/* Line 1427 of yacc.c  */
-#line 592 "src/parse-gram.y"
-    { grammar_current_rule_dprec_set ((yyvsp[0].integer), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2669 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 615 "src/parse-gram.y"
+    { grammar_current_rule_prec_set ((yyvsp[0].symbol), (yylsp[0])); }
+/* Line 1735 of yacc.c  */
+#line 2963 "src/parse-gram.c"
     break;
 
   case 93:
-/* Line 1427 of yacc.c  */
-#line 594 "src/parse-gram.y"
-    { grammar_current_rule_merge_set ((yyvsp[0].uniqstr), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2677 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 617 "src/parse-gram.y"
+    { grammar_current_rule_dprec_set ((yyvsp[0].integer), (yylsp[0])); }
+/* Line 1735 of yacc.c  */
+#line 2971 "src/parse-gram.c"
     break;
 
   case 94:
-/* Line 1427 of yacc.c  */
-#line 598 "src/parse-gram.y"
-    { (yyval.named_ref) = 0; }
-/* Line 1427 of yacc.c  */
-#line 2685 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 619 "src/parse-gram.y"
+    { grammar_current_rule_merge_set ((yyvsp[0].uniqstr), (yylsp[0])); }
+/* Line 1735 of yacc.c  */
+#line 2979 "src/parse-gram.c"
     break;
 
   case 95:
-/* Line 1427 of yacc.c  */
-#line 600 "src/parse-gram.y"
+/* Line 1735 of yacc.c  */
+#line 623 "src/parse-gram.y"
+    { (yyval.named_ref) = 0; }
+/* Line 1735 of yacc.c  */
+#line 2987 "src/parse-gram.c"
+    break;
+
+  case 96:
+/* Line 1735 of yacc.c  */
+#line 625 "src/parse-gram.y"
     { (yyval.named_ref) = named_ref_new((yyvsp[0].uniqstr), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2693 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 2995 "src/parse-gram.c"
     break;
 
-  case 97:
-/* Line 1427 of yacc.c  */
-#line 612 "src/parse-gram.y"
+  case 98:
+/* Line 1735 of yacc.c  */
+#line 636 "src/parse-gram.y"
     { (yyval.uniqstr) = uniqstr_new ((yyvsp[0].chars)); }
-/* Line 1427 of yacc.c  */
-#line 2701 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 3003 "src/parse-gram.c"
     break;
 
-  case 98:
-/* Line 1427 of yacc.c  */
-#line 617 "src/parse-gram.y"
+  case 99:
+/* Line 1735 of yacc.c  */
+#line 641 "src/parse-gram.y"
     { (yyval.chars) = ""; }
-/* Line 1427 of yacc.c  */
-#line 2709 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 3011 "src/parse-gram.c"
     break;
 
-  case 99:
-/* Line 1427 of yacc.c  */
-#line 618 "src/parse-gram.y"
+  case 100:
+/* Line 1735 of yacc.c  */
+#line 642 "src/parse-gram.y"
     { (yyval.chars) = (yyvsp[0].uniqstr); }
-/* Line 1427 of yacc.c  */
-#line 2717 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 3019 "src/parse-gram.c"
     break;
 
-  case 101:
-/* Line 1427 of yacc.c  */
-#line 629 "src/parse-gram.y"
+  case 102:
+/* Line 1735 of yacc.c  */
+#line 653 "src/parse-gram.y"
     {
       code_props plain_code;
       (yyvsp[0].code)[strlen ((yyvsp[0].code)) - 1] = '\n';
@@ -2727,52 +3029,52 @@ yyreduce:
       gram_scanner_last_string_free ();
       (yyval.chars) = plain_code.code;
     }
-/* Line 1427 of yacc.c  */
-#line 2732 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 3034 "src/parse-gram.c"
     break;
 
-  case 102:
-/* Line 1427 of yacc.c  */
-#line 649 "src/parse-gram.y"
+  case 103:
+/* Line 1735 of yacc.c  */
+#line 673 "src/parse-gram.y"
     { (yyval.symbol) = symbol_from_uniqstr ((yyvsp[0].uniqstr), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2740 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 3042 "src/parse-gram.c"
     break;
 
-  case 103:
-/* Line 1427 of yacc.c  */
-#line 651 "src/parse-gram.y"
+  case 104:
+/* Line 1735 of yacc.c  */
+#line 675 "src/parse-gram.y"
     {
       (yyval.symbol) = symbol_get (char_name ((yyvsp[0].character)), (yylsp[0]));
       symbol_class_set ((yyval.symbol), token_sym, (yylsp[0]), false);
       symbol_user_token_number_set ((yyval.symbol), (yyvsp[0].character), (yylsp[0]));
     }
-/* Line 1427 of yacc.c  */
-#line 2752 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 3054 "src/parse-gram.c"
     break;
 
-  case 104:
-/* Line 1427 of yacc.c  */
-#line 659 "src/parse-gram.y"
+  case 105:
+/* Line 1735 of yacc.c  */
+#line 683 "src/parse-gram.y"
     { (yyval.symbol) = symbol_from_uniqstr ((yyvsp[0].uniqstr), (yylsp[0])); }
-/* Line 1427 of yacc.c  */
-#line 2760 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 3062 "src/parse-gram.c"
     break;
 
-  case 107:
-/* Line 1427 of yacc.c  */
-#line 671 "src/parse-gram.y"
+  case 108:
+/* Line 1735 of yacc.c  */
+#line 695 "src/parse-gram.y"
     {
       (yyval.symbol) = symbol_get (quotearg_style (c_quoting_style, (yyvsp[0].chars)), (yylsp[0]));
       symbol_class_set ((yyval.symbol), token_sym, (yylsp[0]), false);
     }
-/* Line 1427 of yacc.c  */
-#line 2771 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 3073 "src/parse-gram.c"
     break;
 
-  case 109:
-/* Line 1427 of yacc.c  */
-#line 680 "src/parse-gram.y"
+  case 110:
+/* Line 1735 of yacc.c  */
+#line 704 "src/parse-gram.y"
     {
       code_props plain_code;
       code_props_plain_init (&plain_code, (yyvsp[0].chars), (yylsp[0]));
@@ -2781,15 +3083,18 @@ yyreduce:
       muscle_code_grow ("epilogue", plain_code.code, (yylsp[0]));
       code_scanner_last_string_free ();
     }
-/* Line 1427 of yacc.c  */
-#line 2786 "src/parse-gram.c"
+/* Line 1735 of yacc.c  */
+#line 3088 "src/parse-gram.c"
     break;
 
 
-/* Line 1427 of yacc.c  */
-#line 2791 "src/parse-gram.c"
-      default: break;
-    }
+/* Line 1735 of yacc.c  */
+#line 3093 "src/parse-gram.c"
+        default: break;
+      }
+    if (yychar_backup != yychar)
+      YY_LAC_DISCARD ("yychar change");
+  }
   /* User semantic actions sometimes alter yychar, and that requires
      that yytoken be updated with the new translation.  We take the
      approach of translating immediately before every use of yytoken.
@@ -2831,7 +3136,7 @@ yyreduce:
 yyerrlab:
   /* Make sure we have latest lookahead translation.  See comments at
      user semantic actions for why this is necessary.  */
-  yytoken = YYTRANSLATE (yychar);
+  yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
 
   /* If not already recovering from an error, report this error.  */
   if (!yyerrstatus)
@@ -2840,50 +3145,61 @@ yyerrlab:
 #if ! YYERROR_VERBOSE
       yyerror (YY_("syntax error"));
 #else
-      while (1)
-        {
-          int yysyntax_error_status =
-            yysyntax_error (&yymsg_alloc, &yymsg, yystate, yytoken);
-          if (yysyntax_error_status == 2 && 0 < yymsg_alloc)
-            {
-              if (yymsg != yymsgbuf)
-                YYSTACK_FREE (yymsg);
-              yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
-              if (yymsg)
-                continue;
-              yymsg = yymsgbuf;
-              yymsg_alloc = sizeof yymsgbuf;
-            }
-          if (yysyntax_error_status == 0)
-            yyerror (yymsg);
-          else
-            yyerror (YY_("syntax error"));
-          if (yysyntax_error_status == 2)
-            goto yyexhaustedlab;
-          break;
-        }
+# define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, \
+                                        yyesa, &yyes, &yyes_capacity, \
+                                        yyssp, yytoken)
+      {
+        char const *yymsgp = YY_("syntax error");
+        int yysyntax_error_status;
+        if (yychar != YYEMPTY)
+          YY_LAC_ESTABLISH;
+        yysyntax_error_status = YYSYNTAX_ERROR;
+        if (yysyntax_error_status == 0)
+          yymsgp = yymsg;
+        else if (yysyntax_error_status == 1)
+          {
+            if (yymsg != yymsgbuf)
+              YYSTACK_FREE (yymsg);
+            yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
+            if (!yymsg)
+              {
+                yymsg = yymsgbuf;
+                yymsg_alloc = sizeof yymsgbuf;
+                yysyntax_error_status = 2;
+              }
+            else
+              {
+                yysyntax_error_status = YYSYNTAX_ERROR;
+                yymsgp = yymsg;
+              }
+          }
+        yyerror (yymsgp);
+        if (yysyntax_error_status == 2)
+          goto yyexhaustedlab;
+      }
+# undef YYSYNTAX_ERROR
 #endif
     }
 
-  yyerror_range[0] = yylloc;
+  yyerror_range[1] = yylloc;
 
   if (yyerrstatus == 3)
     {
       /* If just tried and failed to reuse lookahead token after an
-	 error, discard it.  */
+         error, discard it.  */
 
       if (yychar <= YYEOF)
-	{
-	  /* Return failure if at end of input.  */
-	  if (yychar == YYEOF)
-	    YYABORT;
-	}
+        {
+          /* Return failure if at end of input.  */
+          if (yychar == YYEOF)
+            YYABORT;
+        }
       else
-	{
-	  yydestruct ("Error: discarding",
-		      yytoken, &yylval, &yylloc);
-	  yychar = YYEMPTY;
-	}
+        {
+          yydestruct ("Error: discarding",
+                      yytoken, &yylval, &yylloc);
+          yychar = YYEMPTY;
+        }
     }
 
   /* Else will try to reuse lookahead token after shifting the error
@@ -2902,7 +3218,7 @@ yyerrorlab:
   if (/*CONSTCOND*/ 0)
      goto yyerrorlab;
 
-  yyerror_range[0] = yylsp[1-yylen];
+  yyerror_range[1] = yylsp[1-yylen];
   /* Do not reclaim the symbols of the rule which action triggered
      this YYERROR.  */
   YYPOPSTACK (yylen);
@@ -2916,40 +3232,44 @@ yyerrorlab:
 | yyerrlab1 -- common code for both syntax error and YYERROR.  |
 `-------------------------------------------------------------*/
 yyerrlab1:
-  yyerrstatus = 3;	/* Each real token shifted decrements this.  */
+  yyerrstatus = 3;      /* Each real token shifted decrements this.  */
 
   for (;;)
     {
       yyn = yypact[yystate];
       if (!yypact_value_is_default (yyn))
-	{
-	  yyn += YYTERROR;
-	  if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
-	    {
-	      yyn = yytable[yyn];
-	      if (0 < yyn)
-		break;
-	    }
-	}
+        {
+          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;
+        YYABORT;
 
-      yyerror_range[0] = *yylsp;
+      yyerror_range[1] = *yylsp;
       yydestruct ("Error: popping",
-		  yystos[yystate], yyvsp, yylsp);
+                  yystos[yystate], yyvsp, yylsp);
       YYPOPSTACK (1);
       yystate = *yyssp;
       YY_STACK_PRINT (yyss, yyssp);
     }
 
+  /* If the stack popping above didn't lose the initial context for the
+     current lookahead token, the shift below will for sure.  */
+  YY_LAC_DISCARD ("error recovery");
+
   *++yyvsp = yylval;
 
-  yyerror_range[1] = yylloc;
+  yyerror_range[2] = yylloc;
   /* Using YYLLOC is tempting, but would change the location of
      the lookahead.  YYLOC is available though.  */
-  YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2);
+  YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
   *++yylsp = yyloc;
 
   /* Shift the error token.  */
@@ -2973,7 +3293,7 @@ yyabortlab:
   yyresult = 1;
   goto yyreturn;
 
-#if !defined(yyoverflow) || YYERROR_VERBOSE
+#if 1
 /*-------------------------------------------------.
 | yyexhaustedlab -- memory exhaustion comes here.  |
 `-------------------------------------------------*/
@@ -2999,13 +3319,15 @@ yyreturn:
   while (yyssp != yyss)
     {
       yydestruct ("Cleanup: popping",
-		  yystos[*yyssp], yyvsp, yylsp);
+                  yystos[*yyssp], yyvsp, yylsp);
       YYPOPSTACK (1);
     }
 #ifndef yyoverflow
   if (yyss != yyssa)
     YYSTACK_FREE (yyss);
 #endif
+  if (yyes != yyesa)
+    YYSTACK_FREE (yyes);
 #if YYERROR_VERBOSE
   if (yymsg != yymsgbuf)
     YYSTACK_FREE (yymsg);
@@ -3014,8 +3336,8 @@ yyreturn:
   return YYID (yyresult);
 }
 
-/* Line 1657 of yacc.c  */
-#line 690 "src/parse-gram.y"
+/* Line 1995 of yacc.c  */
+#line 714 "src/parse-gram.y"
 
 
 
@@ -3035,14 +3357,14 @@ lloc_default (YYLTYPE const *rhs, int n)
   loc.start = rhs[n].end;
   loc.end = rhs[n].end;
 
-  /* Ignore empty nonterminals the start of the the right-hand side.
+  /* Ignore empty nonterminals the start of the right-hand side.
      Do not bother to ignore them at the end of the right-hand side,
      since empty nonterminals have the same end as their predecessors.  */
   for (i = 1; i <= n; i++)
     if (! equal_boundaries (rhs[i].start, rhs[i].end))
       {
-	loc.start = rhs[i].start;
-	break;
+        loc.start = rhs[i].start;
+        break;
       }
 
   return loc;
@@ -3078,20 +3400,11 @@ add_param (param_type type, char *decl, location loc)
   }
 
   if (! name_start)
-    complain_at (loc, _("missing identifier in parameter declaration"));
+    complain_at (loc, complaint,
+                 _("missing identifier in parameter declaration"));
   else
     {
-      char *name;
-      size_t name_len;
-
-      for (name_len = 1;
-	   memchr (alphanum, name_start[name_len], sizeof alphanum);
-	   name_len++)
-	continue;
-
-      name = xmalloc (name_len + 1);
-      memcpy (name, name_start, name_len);
-      name[name_len] = '\0';
+      char *name = xmemdup0 (name_start, strspn (name_start, alphanum));
       if (type & param_lex)
         muscle_pair_list_grow ("lex_param", decl, name);
       if (type & param_parse)
@@ -3108,16 +3421,16 @@ version_check (location const *loc, char const *version)
 {
   if (strverscmp (version, PACKAGE_VERSION) > 0)
     {
-      complain_at (*loc, "require bison %s, but have %s",
-		   version, PACKAGE_VERSION);
-      exit (63);
+      complain_at (*loc, complaint, "require bison %s, but have %s",
+                   version, PACKAGE_VERSION);
+      exit (EX_MISMATCH);
     }
 }
 
 static void
 gram_error (location const *loc, char const *msg)
 {
-  complain_at (*loc, "%s", msg);
+  complain_at (*loc, complaint, "%s", msg);
 }
 
 char const *