Hopefully this is the right mailing list...
It seems like there’s currently no way to declare a type that is an object conforming to a protocol in Swift, and I think that would be a useful language feature to add.
To be super clear about what I mean, if I have the following code:
class MyClass {
…
}
protocol MyProtocol {
…
}
There is currently no way to do something like (in pseudo-code):
var thing: MyClass & MyProtocol = …
In Objective-C, you would do:
MyClass <MyProtocol> *thing ...
Is this up for consideration, or is there a reason why this isn’t possible? Thanks.
Richard
This is part of the existential types and a highly wanted feature. You can read more about here and here.
···
--
Adrian Zubarev
Sent with Airmail
Am 21. November 2016 um 22:01:33, Richard Henry via swift-evolution (swift-evolution@swift.org) schrieb:
Hopefully this is the right mailing list...
It seems like there’s currently no way to declare a type that is an object conforming to a protocol in Swift, and I think that would be a useful language feature to add.
To be super clear about what I mean, if I have the following code:
class MyClass {
…
}
protocol MyProtocol {
…
}
There is currently no way to do something like (in pseudo-code):
var thing: MyClass & MyProtocol = …
In Objective-C, you would do:
MyClass <MyProtocol> *thing ...
Is this up for consideration, or is there a reason why this isn’t possible? Thanks.
Richard
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