The former version gave a fatal error message at the first undefined

nonterminal. The new version checks all nonterminals

diff --git a/util/LLgen/src/reach.c b/util/LLgen/src/reach.c
index 72f8088..233cc33 100644 (file)
--- a/util/LLgen/src/reach.c
+++ b/util/LLgen/src/reach.c
@@ -58,7 +58,7 @@ co_reach() {
        for (p = nonterms; p < maxnt; p++) {
                if (! p->n_rule) {
                        f_input = p->n_string;
-                       fatal(p->n_lineno,"nonterminal %s not defined",
+                       error(p->n_lineno,"nonterminal %s not defined",
                                (min_nt_ent + (p - nonterms))->h_name);
                }
        }
@@ -93,7 +93,7 @@ reachable(p) register p_nont p; {
                /*
                 * Now walk its grammar rule
                 */
-               reachwalk(p->n_rule);
+               if (p->n_rule) reachwalk(p->n_rule);
        }
 }