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116 lines
2.6 KiB
C
116 lines
2.6 KiB
C
/* Lists of symbols for Bison
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Copyright (C) 2002 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., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "system.h"
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#include "complain.h"
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#include "symlist.h"
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/*--------------------------------------.
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| Create a list containing SYM at LOC. |
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`--------------------------------------*/
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symbol_list *
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symbol_list_new (symbol *sym, location loc)
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{
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symbol_list *res = MALLOC (res, 1);
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res->next = NULL;
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res->sym = sym;
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res->location = loc;
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res->action = NULL;
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res->ruleprec = NULL;
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res->dprec = 0;
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res->merger = 0;
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return res;
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}
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/*---------------------------------.
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| Prepend SYM at LOC to the LIST. |
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`---------------------------------*/
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symbol_list *
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symbol_list_prepend (symbol_list *list, symbol *sym, location loc)
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{
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symbol_list *res = symbol_list_new (sym, loc);
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res->next = list;
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return res;
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}
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/*-------------------------------------------------.
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| Free the LIST, but not the symbols it contains. |
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`-------------------------------------------------*/
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void
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symbol_list_free (symbol_list *list)
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{
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LIST_FREE (symbol_list, list);
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}
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/*--------------------.
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| Return its length. |
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`--------------------*/
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unsigned int
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symbol_list_length (symbol_list *list)
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{
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int res = 0;
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for (/* Nothing. */; list; list = list->next)
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++res;
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return res;
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}
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/*--------------------------------------------------------------.
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| Get the data type (alternative in the union) of the value for |
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| symbol N in symbol list RP. |
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`--------------------------------------------------------------*/
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uniqstr
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symbol_list_n_type_name_get (symbol_list *rp, location loc, int n)
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{
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int i;
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if (n < 0)
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{
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complain_at (loc, _("invalid $ value"));
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return NULL;
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}
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i = 0;
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while (i < n)
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{
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rp = rp->next;
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if (rp == NULL || rp->sym == NULL)
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{
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complain_at (loc, _("invalid $ value"));
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return NULL;
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}
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++i;
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}
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return rp->sym->type_name;
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}
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