/* Match rules with nonterminals for bison,
- Copyright (C) 1984, 1989, 2000 Free Software Foundation, Inc.
+ Copyright 1984, 1989, 2000, 2001 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
#ifndef DERIVES_H_
# define DERIVES_H_
+/* DERIVES[SYMBOL - NTOKENS] points to a vector of the number of the
+ rules that SYMBOL derives, terminated with -1. */
extern short **derives;
-/* set_derives finds, for each variable (nonterminal), which rules can
- derive it. It sets up the value of derives so that derives[i -
- ntokens] points to a vector of rule numbers, terminated with -1.
- */
+/* Compute DERIVES. */
void set_derives PARAMS((void));
void free_derives PARAMS((void));