[swift-users] Extensions on Typealiased Existential Protocols

[Jon Shier]

What I usually do here is:
typealias CProtocol = A & B
protocol C: CProtocol { } // or just A & B directly, I think
extension C {}

So it’s a bit silly to me.


Jon


> On Jun 19, 2017, at 3:44 PM, Slava Pestov via swift-users <swift-users at swift.org> wrote:
> 
> Hi Steven,
> 
>> On Jun 19, 2017, at 11:44 AM, Steven Brunwasser via swift-users <swift-users at swift.org <mailto:swift-users at swift.org>> wrote:
>> 
>> Is this error intentional, or a bug?
> 
> It’s intentional. We could add support for this as an extra bit of sugar, but note that
> 
>> Since extension A where Self: B is the same as extension B where Self: A,
> 
> This is not quite true.
> 
> Slava
> 
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