[swift-evolution] [Draft] Mixins: What present problems do they solve?

[Matt Whiteside]

> On Feb 29, 2016, at 20:55, Jeremy W. Sherman via swift-evolution <swift-evolution at swift.org> wrote:
> 
> What could we accomplish with before advice on viewDidLoad? Would this solve any thorny problems we have now? Might adding aspect oriented programming features to protocols avoid the sticky issue of stored properties while neatly solving real problems?
> 
> I don't know the answers, but feel a convincing proposal will speak to how it will solve problems, while a truly wondrous proposal will relieve me of burthens I didn't even know I had been shouldering all this time.

Nicely put.

-Matt