[swift-users] Extensions on Typealiased Existential Protocols

[Slava Pestov]

Hi Steven,

> On Jun 19, 2017, at 11:44 AM, Steven Brunwasser via swift-users <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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