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84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/* Lists of symbols for Bison
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Copyright (C) 2002, 2005 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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Bison is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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Bison is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bison; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#ifndef SYMLIST_H_
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# define SYMLIST_H_
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# include "location.h"
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# include "symtab.h"
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/* A list of symbols, used during the parsing to store the rules. */
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typedef struct symbol_list
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{
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/* The symbol. */
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symbol *sym;
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location location;
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/* If this symbol is the generated lhs for a mid-rule, a pointer to
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that mid-rule. */
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struct symbol_list *midrule;
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/* The action is attached to the LHS of a rule. */
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const char *action;
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location action_location;
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/* Whether this symbol's value is used in the current action. */
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bool used;
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/* Precedence/associativity. */
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symbol *ruleprec;
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int dprec;
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int merger;
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/* The list. */
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struct symbol_list *next;
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} symbol_list;
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/* Create a list containing SYM at LOC. */
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symbol_list *symbol_list_new (symbol *sym, location loc);
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/* Print it. */
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void symbol_list_print (const symbol_list *l, FILE *f);
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/* Prepend SYM at LOC to the LIST. */
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symbol_list *symbol_list_prepend (symbol_list *l,
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symbol *sym,
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location loc);
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/* Free the LIST, but not the symbols it contains. */
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void symbol_list_free (symbol_list *l);
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/* Return its length. */
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unsigned int symbol_list_length (const symbol_list *l);
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/* Get symbol N in symbol list L. */
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symbol_list *symbol_list_n_get (symbol_list *l, int n);
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/* Get the data type (alternative in the union) of the value for
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symbol N in rule RULE. */
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uniqstr symbol_list_n_type_name_get (symbol_list *l, location loc, int n);
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/* The symbol N in symbol list L is USED. */
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void symbol_list_n_used_set (symbol_list *l, int n, bool used);
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#endif /* !SYMLIST_H_ */
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