reduced unnecessary node at string literal concatenation with empty h…

…ead dstr
MacRuby · Jan 14, 2012 · 71770e5 · 71770e5
1 parent 6a033db
commit 71770e5
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/parse.y b/parse.y
@@ -7788,6 +7788,9 @@ literal_concat_gen(struct parser_params *parser, NODE *head, NODE *tail)
 	    rb_gc_force_recycle((VALUE)head);
 	    head = tail;
 	}
+	else if (NIL_P(tail->nd_lit)) {
+	    list_concat(head, tail->nd_next);
+	}
 	else {
 	    nd_set_type(tail, NODE_ARRAY);
 	    GC_WB(&tail->nd_head, NEW_STR(tail->nd_lit));