From: ceriel <none@none>
Date: Wed, 29 Oct 1986 11:16:55 +0000 (+0000)
Subject: Bug fix. Error recovery did not always work as expected. The generated
X-Git-Tag: release-5-5~5175
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=de5ac65dd6ce6e0baf7e7943fff2406dce03f335;p=ack.git

Bug fix. Error recovery did not always work as expected. The generated
parser sometimes assumed that a token would not be deleted, and inserted
tokens in front of it, and then deleted the token after all. It should
at each error, first delete, and then insert.
---

diff --git a/util/LLgen/src/compute.c b/util/LLgen/src/compute.c
index 00c741926..fd42e1ba3 100644
--- a/util/LLgen/src/compute.c
+++ b/util/LLgen/src/compute.c
@@ -759,6 +759,10 @@ STATIC int nsafes(p) register p_nont p; {
 	i = getntsafe(p);
 	if (i != NOSAFETY) {
 		i = do_safes(p->n_rule, i, &ch);
+		if (i < SCANDONE) i = SCANDONE;
+		/* After a nonterminal, we only know whether a scan was done
+		   or not
+		*/
 		if (getntout(p) != i) {
 			ch = 1;
 			setntout(p,i);