[swift-evolution] [Draft] Mixins

[Haravikk]

Very interesting alternative!

I think my preferred implementation is to just add these capabilities to protocols directly, as I guess I just don’t see why we need to introduce a separate mixin type. Providing implementation directly within a protocol is definitely something I’d like in general; while extensions can be a nice way to structure complex protocols and types, sometimes simple cases just don’t really need them IMO, so that’d be nice as a general capability, not just for mixins.

> On 27 Feb 2016, at 09:59, Антон Жилин via swift-evolution <swift-evolution at swift.org> wrote:
> 
> Some people opposed to Abstract Classes proposal (including myself) have said that mixins could solve the problem better.
> So I prepaired a proposal draft to add stored properties to protocols. Here it is:
> https://gist.github.com/Anton3/f0550922c1be0fc5447c <https://gist.github.com/Anton3/f0550922c1be0fc5447c>
> 
> P.S. I added a `mixin` keyword in the beginning, but we can opt to just extend protocols, which I mention in "alternatives".
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