[SR-2688] autoclosure does not support closure typealias

[swift-ci]

Previous ID	SR-2688
Radar	None
Original Reporter	paul.eipper (JIRA User)
Type	Bug
Status	Resolved
Resolution	Done

Environment

Xcode 8 (8A218a)
Apple Swift version 3.0 (swiftlang-800.0.46.2 clang-800.0.38)
Build Target iOS SDK 10

Additional Detail from JIRA

Votes	6
Component/s	Compiler
Labels	Bug
Assignee	@theblixguy
Priority	Medium

md5: 9f37a359be81b189770a77e2934b7c3e

duplicates:

• SR-3824 Autoclosure attribute fails with type aliased function

Issue Description:

This will not work in Swift 3:

typealias ViewClosure = () -> UIView

class ViewController: UIViewController {

    func viewMaker(closure: @autoclosure ViewClosure) {
        self.view = closure()
    }

}

Error:

@autoclosure ViewClosure: @autoclosure attribute only applies to function types

[swift-ci]

Comment by Jonathan (JIRA)

Any progress on this? It seems like something that should happen based on the way typealias's are defined.

[NachoSoto]

I can't believe this is still unresolved. I filed SR-3824 on February 2017...

[theblixguy]

PR: #22015

[theblixguy]

jon889 (JIRA User) @NachoSoto Fixed on master.

[swift-ci]

Comment by Slipp Douglas Thompson (JIRA)

For clarity, looks like this bug is present in Swift 5.0/5.0.1 and fixed as of Swift 5.1.