parse.c

gcc库的原代码,对编程有很大帮助.

/*  A Bison parser, made from parse.y with Bison version GNU Bison version 1.22
  */

#define YYBISON 1  /* Identify Bison output.  */

#define	IDENTIFIER	258
#define	TYPENAME	259
#define	SCSPEC	260
#define	TYPESPEC	261
#define	TYPE_QUAL	262
#define	CONSTANT	263
#define	STRING	264
#define	ELLIPSIS	265
#define	SIZEOF	266
#define	ENUM	267
#define	IF	268
#define	ELSE	269
#define	WHILE	270
#define	DO	271
#define	FOR	272
#define	SWITCH	273
#define	CASE	274
#define	DEFAULT	275
#define	BREAK	276
#define	CONTINUE	277
#define	RETURN	278
#define	GOTO	279
#define	ASM_KEYWORD	280
#define	GCC_ASM_KEYWORD	281
#define	TYPEOF	282
#define	ALIGNOF	283
#define	SIGOF	284
#define	ATTRIBUTE	285
#define	EXTENSION	286
#define	LABEL	287
#define	AGGR	288
#define	VISSPEC	289
#define	DELETE	290
#define	NEW	291
#define	OVERLOAD	292
#define	THIS	293
#define	OPERATOR	294
#define	CXX_TRUE	295
#define	CXX_FALSE	296
#define	NAMESPACE	297
#define	TYPENAME_KEYWORD	298
#define	USING	299
#define	LEFT_RIGHT	300
#define	TEMPLATE	301
#define	TYPEID	302
#define	DYNAMIC_CAST	303
#define	STATIC_CAST	304
#define	REINTERPRET_CAST	305
#define	CONST_CAST	306
#define	SCOPE	307
#define	EMPTY	308
#define	PTYPENAME	309
#define	NSNAME	310
#define	THROW	311
#define	ASSIGN	312
#define	OROR	313
#define	ANDAND	314
#define	MIN_MAX	315
#define	EQCOMPARE	316
#define	ARITHCOMPARE	317
#define	LSHIFT	318
#define	RSHIFT	319
#define	POINTSAT_STAR	320
#define	DOT_STAR	321
#define	UNARY	322
#define	PLUSPLUS	323
#define	MINUSMINUS	324
#define	HYPERUNARY	325
#define	PAREN_STAR_PAREN	326
#define	POINTSAT	327
#define	TRY	328
#define	CATCH	329
#define	TYPENAME_ELLIPSIS	330
#define	PRE_PARSED_FUNCTION_DECL	331
#define	EXTERN_LANG_STRING	332
#define	ALL	333
#define	PRE_PARSED_CLASS_DECL	334
#define	TYPENAME_DEFN	335
#define	IDENTIFIER_DEFN	336
#define	PTYPENAME_DEFN	337
#define	END_OF_LINE	338
#define	END_OF_SAVED_INPUT	339

#line 29 "parse.y"

/* Cause the `yydebug' variable to be defined.  */
#define YYDEBUG 1

#include "config.h"

#include <stdio.h>
#include <errno.h>

#include "tree.h"
#include "input.h"
#include "flags.h"
#include "lex.h"
#include "cp-tree.h"
#include "output.h"

/* Since parsers are distinct for each language, put the language string
   definition here.  (fnf) */
char *language_string = "GNU C++";

extern tree void_list_node;
extern struct obstack permanent_obstack;

#ifndef errno
extern int errno;
#endif

extern int end_of_file;
extern int current_class_depth;

/* FSF LOCAL dje prefix attributes */
extern tree strip_attrs		PROTO((tree));
/* END FSF LOCAL */

void yyerror ();

/* Like YYERROR but do call yyerror.  */
#define YYERROR1 { yyerror ("syntax error"); YYERROR; }

#define OP0(NODE) (TREE_OPERAND (NODE, 0))
#define OP1(NODE) (TREE_OPERAND (NODE, 1))

/* Contains the statement keyword (if/while/do) to include in an
   error message if the user supplies an empty conditional expression.  */
static char *cond_stmt_keyword;

/* Nonzero if we have an `extern "C"' acting as an extern specifier.  */
int have_extern_spec;
int used_extern_spec;

void yyhook ();

/* Cons up an empty parameter list.  */
#ifdef __GNUC__
__inline
#endif
static tree
empty_parms ()
{
  tree parms;

  if (strict_prototype)
    parms = void_list_node;
  else
    parms = NULL_TREE;
  return parms;
}

#line 100 "parse.y"
typedef union {long itype; tree ttype; char *strtype; enum tree_code code; } YYSTYPE;
#line 278 "parse.y"

/* List of types and structure classes of the current declaration.  */
static tree current_declspecs;
/* List of prefix attributes in effect.
   Prefix attributes are parsed by the reserved_declspecs and declmods
   rules.  They create a list that contains *both* declspecs and attrs.  */
/* ??? It is not clear yet that all cases where an attribute can now appear in
   a declspec list have been updated.  */
static tree prefix_attributes;

/* When defining an aggregate, this is the most recent one being defined.  */
static tree current_aggr;

/* Tell yyparse how to print a token's value, if yydebug is set.  */

#define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
extern void yyprint ();
extern tree combine_strings		PROTO((tree));

#ifndef YYLTYPE
typedef
  struct yyltype
    {
      int timestamp;
      int first_line;
      int first_column;
      int last_line;
      int last_column;
      char *text;
   }
  yyltype;

#define YYLTYPE yyltype
#endif

#include <stdio.h>

#ifndef __cplusplus
#ifndef __STDC__
#define const
#endif
#endif



#define	YYFINAL		1399
#define	YYFLAG		-32768
#define	YYNTBASE	109

#define YYTRANSLATE(x) ((unsigned)(x) <= 339 ? yytranslate[x] : 364)

static const char yytranslate[] = {     0,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,   107,     2,     2,     2,    80,    68,     2,    91,
   105,    78,    76,    57,    77,    90,    79,     2,     2,     2,