[vala] Report error when declaring virtual methods as extern

[Jürg Billeter <juergbi src gnome org>]

commit 4a6a5376c6316a2be5f587360f01095edcb6ee0e
Author: Jürg Billeter <j bitron ch>
Date:   Tue Jul 28 18:33:06 2009 +0200

    Report error when declaring virtual methods as extern
    
    See bug 584400.

 vala/valamethod.vala |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/vala/valamethod.vala b/vala/valamethod.vala
index 79e9d5c..7fad756 100644
--- a/vala/valamethod.vala
+++ b/vala/valamethod.vala
@@ -690,6 +690,8 @@ public class Vala.Method : Member {
 
 		if (is_abstract && body != null) {
 			Report.error (source_reference, "Abstract methods cannot have bodies");
+		} else if ((is_abstract || is_virtual) && external && !external_package) {
+			Report.error (source_reference, "Extern methods cannot be abstract or virtual");
 		} else if (external && body != null) {
 			Report.error (source_reference, "Extern methods cannot have bodies");
 		} else if (!is_abstract && !external && !external_package && body == null) {