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> On Jan 3, 2016, at 10:53 AM, David Waite via swift-evolution > <[email protected]> wrote: > > I like this, and had considered proposing something similar. > > Points: > I would have chose to leave protocol to mean the dynamically dispatch-able > type declaration, as that is what it indicates in Objective-C. Your proposal > would cause every Objective-C protocol to now be considered an interface in > Swift terms. > > Some discussion on this list makes me think that you might instead have a > modifier for declaring statically dispatched, existential protocols - e.g. > “existential protocol SequenceType { … }” The problem with *requiring* distinct syntax for protocols that are intended to be used as existential a is that it is a stated goal to expand the kinds of protocols which can be used as existentials. In other words, the set of protocols that can be used as existentials is a moving target that is likely to grow substantially in the future. I would be comfortable with some kind of optional assertion that a protocol can be used as an existential but probably not comfortable with anything more than that. > > Also, note not all usage of Self need be disallowed in dynamically > dispatch-able types today: > > protocol Test { > func foo() -> Self > } > > var t:Test? // legal, I assume on purpose due to the covariance of the return > type > > -DW > >> On Jan 3, 2016, at 7:48 AM, Антон Жилин via swift-evolution >> <[email protected]> wrote: >> >> Introduction of interfaces will clean up the current blend of static and >> dynamic protocols, and solve at least three popular issues. >> Please see: >> https://github.com/Anton3/swift-evolution/blob/master/proposals/0000-introducing-interfaces.md >> _______________________________________________ >> swift-evolution mailing list >> [email protected] >> https://lists.swift.org/mailman/listinfo/swift-evolution > > > _______________________________________________ > swift-evolution mailing list > [email protected] > https://lists.swift.org/mailman/listinfo/swift-evolution
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