[Issue 2501] New: member function marked as final override ignores override requirements

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=2501

           Summary: member function marked as final override ignores
                    override requirements
           Product: D
           Version: 1.037
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: accepts-invalid
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: schveiguy at yahoo.com


example:

class C
{
    final override void foo(){}
}

This should fail to compile, because foo is not overriding any virtual
function.  A final function is allowed to override a virtual function to stop
overriding in derived classes, and to help performance.

Also happens on D 2.019


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