add is_pure method to Expression class

2007-11-29  Juerg Billeter  <j@bitron.ch>

	* vala/valaaddressofexpression.vala,
	  vala/valaarraycreationexpression.vala, vala/valaassignment.vala,
	  vala/valabaseaccess.vala, vala/valabinaryexpression.vala,
	  vala/valacastexpression.vala, vala/valaconditionalexpression.vala,
	  vala/valaelementaccess.vala, vala/valaexpression.vala,
	  vala/valainitializerlist.vala, vala/valainvocationexpression.vala,
	  vala/valalambdaexpression.vala, vala/valaliteralexpression.vala,
	  vala/valamemberaccess.vala, vala/valaobjectcreationexpression.vala,
	  vala/valaparenthesizedexpression.vala,
	  vala/valapointerindirection.vala, vala/valapostfixexpression.vala,
	  vala/valareferencetransferexpression.vala,
	  vala/valasizeofexpression.vala, vala/valatypecheck.vala,
	  vala/valatypeofexpression.vala, vala/valaunaryexpression.vala: add
	  is_pure method to Expression class

svn path=/trunk/; revision=739

1 files changed, 9 insertions, 0 deletions

diff --git a/vala/valaelementaccess.vala b/vala/valaelementaccess.vala
index cbd8ff7c8..9b9972741 100644
--- a/vala/valaelementaccess.vala
+++ b/vala/valaelementaccess.vala
@@ -57,4 +57,13 @@ public class Vala.ElementAccess : Expression {
 
 		visitor.visit_element_access (this);
 	}
+
+	public override bool is_pure () {
+		foreach (Expression index in indices) {
+			if (!index.is_pure ()) {
+				return false;
+			}
+		}
+		return container.is_pure ();
+	}
 }