[swift-evolution] [Idea] Typealias for protocols with associated types

Maximilian HĂĽnenberger m.huenenberger at me.com
Thu Feb 4 13:20:11 CST 2016

There is already a similar thread: [swift-evolution] Partially Constrained Protocols

There we discussed a more improved generics system including "true" generics for protocols with associated types:

var collection: CollectionType<Generator.Element == Int>

// if CollectionType had an Element typealias to Generator.Element

var collection: CollectionType<Element == Int>

Best regards
- Maximilian

> Am 04.02.2016 um 19:01 schrieb Jessy Catterwaul via swift-evolution <swift-evolution at swift.org>:
> I agree, as long as the typealias and second use of the type name is not necessary.
> Because 
> extension CollectionType where Generator.Element == Int {}
> compiles…
> var collection: CollectionType where Generator.Element == Int
> should also.
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