See Conditional Conformances via Protocol Extensions <https://github.com/apple/swift/blob/master/docs/GenericsManifesto.md#conditional-conformances-via-protocol-extensions>.
> On Dec 6, 2017, at 11:05 AM, Cao, Jiannan via swift-dev <[email protected]> > wrote: > > Recently, we can use conditional conformances for struct/class. > >> extension Array: Equatable where Self.Element : Equatable { ... } > > > Could we use conditional conformances for protocols? > For example: > >> extension Collection : Equatable where Self.Element : Equatable { ... } > > > Thanks! > Jiannan > > > _______________________________________________ > swift-dev mailing list > [email protected] > https://lists.swift.org/mailman/listinfo/swift-dev
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