src/symlist.h

/* Lists of symbols for Bison

   Copyright (C) 2002, 2005, 2006 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., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.  */

#ifndef SYMLIST_H_
# define SYMLIST_H_

# include "location.h"
# include "symtab.h"

/* A list of symbols, used during the parsing to store the rules.  */
typedef struct symbol_list
{
  /* The symbol.  */
  symbol *sym;
  location location;

  /* If this symbol is the generated lhs for a midrule but this is the rule in
     whose rhs it appears, MIDRULE = a pointer to that midrule.  */
  struct symbol_list *midrule;

  /* If this symbol is the generated lhs for a midrule and this is that
     midrule, MIDRULE_PARENT_RULE = a pointer to the rule in whose rhs it
     appears, and MIDRULE_PARENT_RHS_INDEX = its rhs index (1-origin) in the
     parent rule.  */
  struct symbol_list *midrule_parent_rule;
  int midrule_parent_rhs_index;

  /* The action is attached to the LHS of a rule. */
  const char *action;
  location action_location;

  /* Whether this symbol's value is used in the current action.  */
  bool used;

  /* Precedence/associativity.  */
  symbol *ruleprec;
  int dprec;
  int merger;
  location merger_declaration_location;

  /* The list.  */
  struct symbol_list *next;
} symbol_list;


/* Create a list containing SYM at LOC.  */
symbol_list *symbol_list_new (symbol *sym, location loc);

/* Print it.  */
void symbol_list_print (const symbol_list *l, FILE *f);

/* Prepend SYM at LOC to the LIST.  */
symbol_list *symbol_list_prepend (symbol_list *l,
				  symbol *sym,
				  location loc);

/* Free the LIST, but not the symbols it contains.  */
void symbol_list_free (symbol_list *l);

/* Return its length. */
int symbol_list_length (symbol_list const *l);

/* Get symbol N in symbol list L.  */
symbol_list *symbol_list_n_get (symbol_list *l, int n);

/* Get the data type (alternative in the union) of the value for
   symbol N in rule RULE.  */
uniqstr symbol_list_n_type_name_get (symbol_list *l, location loc, int n);

/* The symbol N in symbol list L is USED.  */
void symbol_list_n_used_set (symbol_list *l, int n, bool used);

#endif /* !SYMLIST_H_ */
Commit	Line	Data
	1	/* Lists of symbols for Bison
	2
	3	Copyright (C) 2002, 2005, 2006 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., 51 Franklin Street, Fifth Floor,
	20	Boston, MA 02110-1301, USA. */
	21
	22	#ifndef SYMLIST_H_
	23	# define SYMLIST_H_
	24
	25	# include "location.h"
	26	# include "symtab.h"
	27
	28	/* A list of symbols, used during the parsing to store the rules. */
	29	typedef struct symbol_list
	30	{
	31	/* The symbol. */
	32	symbol *sym;
	33	location location;
	34
	35	/* If this symbol is the generated lhs for a midrule but this is the rule in
	36	whose rhs it appears, MIDRULE = a pointer to that midrule. */
	37	struct symbol_list *midrule;
	38
	39	/* If this symbol is the generated lhs for a midrule and this is that
	40	midrule, MIDRULE_PARENT_RULE = a pointer to the rule in whose rhs it
	41	appears, and MIDRULE_PARENT_RHS_INDEX = its rhs index (1-origin) in the
	42	parent rule. */
	43	struct symbol_list *midrule_parent_rule;
	44	int midrule_parent_rhs_index;
	45
	46	/* The action is attached to the LHS of a rule. */
	47	const char *action;
	48	location action_location;
	49
	50	/* Whether this symbol's value is used in the current action. */
	51	bool used;
	52
	53	/* Precedence/associativity. */
	54	symbol *ruleprec;
	55	int dprec;
	56	int merger;
	57	location merger_declaration_location;
	58
	59	/* The list. */
	60	struct symbol_list *next;
	61	} symbol_list;
	62
	63
	64	/* Create a list containing SYM at LOC. */
	65	symbol_list symbol_list_new (symbol sym, location loc);
	66
	67	/* Print it. */
	68	void symbol_list_print (const symbol_list l, FILE f);
	69
	70	/* Prepend SYM at LOC to the LIST. */
	71	symbol_list symbol_list_prepend (symbol_list l,
	72	symbol *sym,
	73	location loc);
	74
	75	/* Free the LIST, but not the symbols it contains. */
	76	void symbol_list_free (symbol_list *l);
	77
	78	/* Return its length. */
	79	int symbol_list_length (symbol_list const *l);
	80
	81	/* Get symbol N in symbol list L. */
	82	symbol_list symbol_list_n_get (symbol_list l, int n);
	83
	84	/* Get the data type (alternative in the union) of the value for
	85	symbol N in rule RULE. */
	86	uniqstr symbol_list_n_type_name_get (symbol_list *l, location loc, int n);
	87
	88	/* The symbol N in symbol list L is USED. */
	89	void symbol_list_n_used_set (symbol_list *l, int n, bool used);
	90
	91	#endif /* !SYMLIST_H_ */