[swift-evolution] Generic Alaises

[Milos Rankovic]

Chris Lattner has a proposal under review <https://github.com/apple/swift-evolution/blob/master/proposals/0048-generic-typealias.md> on this topic. 

milos

> On 6 Apr 2016, at 20:41, James Campbell via swift-evolution <swift-evolution at swift.org> wrote:
> 
> This was inspired from the topic about moving where clauses out of parameter lists.
> 
> Certain generics get very long winded, I was wondering if we could create some sort of alias for generics.
> 
> func anyCommonElements <T: SequenceType, U: SequenceType where T.Generator.Element: Equatable, T.Generator.Element == U.Generator.Element> (lhs: T, _ rhs: U) -> Bool
> 
> could be shared across functions like so:
> 
> genericalias SequencesWithSameElements<T, U> =  <T: SequenceType, U: SequenceType where T.Generator.Element: Equatable, T.Generator.Element == U.Generator.Element>
> 
> func anyCommonElements <SequencesWithSameElements> (lhs: T, _ rhs: U) -> Bool
> func == <SequencesWithSameElements> (lhs: T, _ rhs: U) -> Bool
> ___________________________________
> 
> James⎥
> 
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