[Issue 16318] inherit from interface via abstract class

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16318

Steven Schveighoffer <schveiguy at yahoo.com> changed:

           What    |Removed                     |Added
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                 CC|                            |schveiguy at yahoo.com

--- Comment #5 from Steven Schveighoffer <schveiguy at yahoo.com> ---
Requiring override for implementing interface methods is too strict. If a class
defines an interface, and doesn't implement a method, compilation fails. So we
don't need that warning/error.

Allowing override for interfaces is fine too. Often times, one decides that an
abstract class really should be an interface or vice versa. To have to go
through and update all the methods to say or not say override is useless
busywork.

Bottom line is that pure virtual functions should allow override, and not
require it, no matter what the source. In effect, since implementing is
REQUIRED, override keyword is a noop.

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