[vala] Improve error message for static access to instance variables

[JÃrg Billeter <juergbi src gnome org>]

commit 808e45fd004ae6574ab1f3c8f30bb6a9889f6b93
Author: Geert Jordaens <geert jordaens telenet be>
Date:   Thu Aug 2 11:08:01 2012 +0200

    Improve error message for static access to instance variables
    
    Fixes bug 642254.

 vala/valabinaryexpression.vala |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/vala/valabinaryexpression.vala b/vala/valabinaryexpression.vala
index 07b3ee3..1457de3 100644
--- a/vala/valabinaryexpression.vala
+++ b/vala/valabinaryexpression.vala
@@ -243,6 +243,17 @@ public class Vala.BinaryExpression : Expression {
 			return false;
 		}
 
+		if (left.value_type is FieldPrototype) {
+			error = true;
+			Report.error (left.source_reference, "Access to instance member `%s' denied".printf (left.symbol_reference.get_full_name ()));
+			return false;
+		}
+		if (right.value_type is FieldPrototype) {
+			error = true;
+			Report.error (right.source_reference, "Access to instance member `%s' denied".printf (right.symbol_reference.get_full_name ()));
+			return false;
+		}
+
 		left.target_type = left.value_type.copy ();
 		left.target_type.value_owned = false;
 		right.target_type = right.value_type.copy ();