src/symtab.h

/* Definitions for symtab.c and callers, part of bison,
   Copyright (C) 1984, 1989, 1992, 2000, 2001, 2002
   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, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef SYMTAB_H_
# define SYMTAB_H_

#define	TABSIZE	1009

/* Associativity values for tokens and rules.  */
typedef enum
{
  right_assoc,
  left_assoc,
  non_assoc
} associativity;


/* Symbol classes.  */
typedef enum
{
  unknown_sym,
  token_sym,		/* terminal symbol */
  nterm_sym		/* non-terminal */
} symbol_class;

/* Internal token numbers. */
typedef short token_number_t;

#define SUNDEF  -1              /* For undefined user number. */
#define SALIAS	-9991		/* for symbol generated with an alias */

#define NUMBER_UNDEFINED ((token_number_t) -1)

struct symbol_s
{
  /* The key, name of the symbol. */
  char *tag;
  /* Its type. */
  char *type_name;

  token_number_t number;
  short prec;
  associativity assoc;
  int user_token_number;

  /* Points to the other in the identifier-symbol pair for an
     alias. Special value SALIAS in the identifier half of the
     identifier-symbol pair for an alias.  */
  struct symbol_s *alias;
  symbol_class class;
};

typedef struct symbol_s symbol_t;

/* A function to apply to each symbol. */
typedef bool (*symbol_processor) PARAMS ((symbol_t *));

symbol_t *getsym PARAMS ((const char *));

void symbols_new PARAMS ((void));
void symbols_do PARAMS ((symbol_processor processor, void *processor_data));
void symbols_free PARAMS ((void));

#endif /* !SYMTAB_H_ */
Commit	Line	Data
	1	/* Definitions for symtab.c and callers, part of bison,
	2	Copyright (C) 1984, 1989, 1992, 2000, 2001, 2002
	3	Free Software Foundation, Inc.
	4
	5	This file is part of Bison, the GNU Compiler Compiler.
	6
	7	Bison is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2, or (at your option)
	10	any later version.
	11
	12	Bison is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with Bison; see the file COPYING. If not, write to
	19	the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	20	Boston, MA 02111-1307, USA. */
	21
	22	#ifndef SYMTAB_H_
	23	# define SYMTAB_H_
	24
	25	#define TABSIZE 1009
	26
	27	/* Associativity values for tokens and rules. */
	28	typedef enum
	29	{
	30	right_assoc,
	31	left_assoc,
	32	non_assoc
	33	} associativity;
	34
	35
	36	/* Symbol classes. */
	37	typedef enum
	38	{
	39	unknown_sym,
	40	token_sym, /* terminal symbol */
	41	nterm_sym /* non-terminal */
	42	} symbol_class;
	43
	44	/* Internal token numbers. */
	45	typedef short token_number_t;
	46
	47	#define SUNDEF -1 /* For undefined user number. */
	48	#define SALIAS -9991 /* for symbol generated with an alias */
	49
	50	#define NUMBER_UNDEFINED ((token_number_t) -1)
	51
	52	struct symbol_s
	53	{
	54	/* The key, name of the symbol. */
	55	char *tag;
	56	/* Its type. */
	57	char *type_name;
	58
	59	token_number_t number;
	60	short prec;
	61	associativity assoc;
	62	int user_token_number;
	63
	64	/* Points to the other in the identifier-symbol pair for an
	65	alias. Special value SALIAS in the identifier half of the
	66	identifier-symbol pair for an alias. */
	67	struct symbol_s *alias;
	68	symbol_class class;
	69	};
	70
	71	typedef struct symbol_s symbol_t;
	72
	73	/* A function to apply to each symbol. */
	74	typedef bool (symbol_processor) PARAMS ((symbol_t ));
	75
	76	symbol_t getsym PARAMS ((const char ));
	77
	78	void symbols_new PARAMS ((void));
	79	void symbols_do PARAMS ((symbol_processor processor, void *processor_data));
	80	void symbols_free PARAMS ((void));
	81
	82	#endif /* !SYMTAB_H_ */