Merge pull request #447 from katef/sv/reject-unsupported-pcre-extensi…

…ons-during-ast-analysis

Add error code for unsupported PCRE cases (RE_EUNSUPPPCRE), reject one.

src/libre/ast_analysis.c

@@ -603,7 +603,8 @@ can_consume_single_newline(struct ast_expr *n)
 			    return n->u.range.from.u.codepoint.u <= '\n'
 				&& n->u.range.to.u.codepoint.u >= '\n';
 		} else if (n->u.range.from.type == AST_ENDPOINT_NAMED) {
-			/* TODO: unreachable? */
+			/* currently unreachable, named ranges are unsupported */
+			assert(!"unreachable");
 			break;
 		}
 		break;
@@ -1130,6 +1131,10 @@ analysis_iter_anchoring(struct anchoring_env *env, struct ast_expr *n)
 			n->u.repeat.max = 1;
 		}
 
+		if (can_consume_single_newline(n->u.repeat.e)) {
+			set_flags(n, AST_FLAG_MATCHES_1NEWLINE);
+		}
+
 		if (n->u.repeat.e->flags & AST_FLAG_ANCHORED_END && n->u.repeat.min > 0) {
 			LOG(3 - LOG_ANCHORING,
 			    "%s: REPEAT: repeating ANCHORED_END subtree >0 times -> ANCHORED_END\n", __func__);