(SALIAS): New #define for adding aliases to %token.

[bison.git] / src / symtab.h

/* Definitions for symtab.c and callers, part of bison,
   Copyright (C) 1984, 1989, 1992 Free Software Foundation, Inc.

This file is part of Bison, the GNU Compiler Compiler.

Bison is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

Bison is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Bison; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */


#define	TABSIZE	1009


/*  symbol classes  */

#define SUNKNOWN 0
#define STOKEN	 1	/* terminal symbol */
#define SNTERM	 2	/* non-terminal */

#define SALIAS	-9991	/* for symbol generated with an alias */

typedef
  struct bucket
    {
      struct bucket *link;
      struct bucket *next;
      char *tag;
      char *type_name;
      short value;
      short prec;
      short assoc;
      short user_token_number;
			/* special value SALIAS in the identifier
			 half of the identifier-symbol pair for an alias */
      struct bucket *alias;      
			/* points to the other in the identifier-symbol
			 pair for an alias */
      char class;
    }
  bucket;


extern bucket **symtab;
extern bucket *firstsymbol;

extern bucket *getsym();