[swift-evolution] [Pitch] merge types and protocols back together with type<Type, Protocol, ...>

Douglas Gregor dgregor at apple.com
Tue May 17 13:02:31 CDT 2016

> On May 17, 2016, at 10:40 AM, Adrian Zubarev <adrian.zubarev at devandartist.com> wrote:
>> You don’t seem to be tackling the case of “A Collection whose Element type is String”. If we’re generalizing the current “protocol<>” notion, why not make it as powerful as a generic signature, with the ability to specify same-type constraints and conformances on associated types?
>> - Doug
> Which part of the manifesto did I left out? ^^ Could you provide a quick pseudo code example?
> Do you mean something like `Any<Collection where Element == String>`? I’m not sure where I should consider such a scenario, maybe at future directions?

That’s the part I’m referring to, yes. I just realized that your proposal isn’t lifting the restrictions on protocols with Self types or associated types, so my suggestion doesn’t make sense for your proposal without a significant increase in scope.

	- Doug

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