/* Match rules with nonterminals for bison,
- Copyright (C) 1984, 1989, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1984, 1989, 2000, 2001, 2002 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
+#ifndef DERIVES_H_
+# define DERIVES_H_
-/* 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.
- */
+/* DERIVES[SYMBOL - NTOKENS] points to a vector of the rules that
+ SYMBOL derives, terminated with NULL. */
+extern rule_t ***derives;
-void set_derives PARAMS((void));
-void free_derives PARAMS((void));
+/* Compute DERIVES. */
+
+void derives_compute (void);
+void derives_free (void);
+
+#endif /* !DERIVES_H_ */