Consider negative literals constant

Fixes bug 605158.

diff --git a/vala/valaunaryexpression.vala b/vala/valaunaryexpression.vala
index b2066a373d101552655f828e50d3c035a77bc366..f5b99e499dc3b515ef65eddb719464e1342084e1 100644 (file)
--- a/vala/valaunaryexpression.vala
+++ b/vala/valaunaryexpression.vala
@@ -1,6 +1,6 @@
 /* valaunaryexpression.vala
  *
- * Copyright (C) 2006-2009  Jürg Billeter
+ * Copyright (C) 2006-2010  Jürg Billeter
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -96,6 +96,14 @@ public class Vala.UnaryExpression : Expression {
                return get_operator_string () + _inner.to_string ();
        }
 
+       public override bool is_constant () {
+               if (operator == UnaryOperator.INCREMENT || operator == UnaryOperator.DECREMENT) {
+                       return false;
+               }
+
+               return inner.is_constant ();
+       }
+
        public override bool is_pure () {
                if (operator == UnaryOperator.INCREMENT || operator == UnaryOperator.DECREMENT) {
                        return false;