[vala] Report error on invalid creation method declarations

[Jürg Billeter <juergbi src gnome org>]

commit 608ace9833e7c60c30d3a4c201bec9f77295af12
Author: Jürg Billeter <j bitron ch>
Date:   Sun Aug 16 21:14:36 2009 +0200

    Report error on invalid creation method declarations
    
    Fixes bug 572060.

 vala/valaparser.vala |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/vala/valaparser.vala b/vala/valaparser.vala
index d41d1b7..f6c9d6f 100644
--- a/vala/valaparser.vala
+++ b/vala/valaparser.vala
@@ -2834,6 +2834,11 @@ public class Vala.Parser : CodeVisitor {
 		if (ModifierFlags.EXTERN in flags) {
 			method.external = true;
 		}
+		if (ModifierFlags.ABSTRACT in flags
+		    || ModifierFlags.VIRTUAL in flags
+		    || ModifierFlags.OVERRIDE in flags) {
+			Report.error (method.source_reference, "abstract, virtual, and override modifiers are not applicable to creation methods");
+		}
 		expect (TokenType.OPEN_PARENS);
 		if (current () != TokenType.CLOSE_PARENS) {
 			do {