Bug 12329 – override for implementing interface methods is not allowed in a subclass

This is likely a dupe report but I can't find the report. ----- module test; interface I { void foo(); } class C : I { override void foo() { } } // ok to use override here class D : C { override void foo() { } } class C2 : I { } class D2 : C2 { override void foo() { } } // error void main() { } ----- The compiler should be consistent, either disallow override in both cases for C and D2, or allow them both. But remember this is about *implementing* the interface function, not overriding it. Note that the diagnostic is also terrible: Error: function test.D2.foo does not override any function, did you mean to override 'test.I.foo'? But I'm sure I saw this filed somewhere too.

*** This issue has been marked as a duplicate of issue 2525 ***