Not an outright answer but the example that comes to mind (vaguely from when I actually skimmed about it aeons ago when dinosaurs still roamed the earth) was the Self language (see Self_(programming_language); also this SO thread looks to have some good pointers (and discussion WRT to JavaScript which has similar prototype inheritance features)).

The cake is a lie.
The cake is a lie.
The cake is a lie.

In reply to Re: Role::Tiny: When to use apply_roles_to_object? by Fletch
in thread Role::Tiny: When to use apply_roles_to_object? by karlgoethebier

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