Closures containing parameter packs

[NoahKamara]

Description

Callbacks that take a parameter pack can not be stored

I am trying to achieve something similar to this but with parameter packs

struct Call<T,J> {
    var callback: (T,J) -> String
    
    init(callback: @escaping (T,J) -> String) {
        self.callback = callback
    }
}

Reproduction

struct PackCall<each T> {
    let callback: (repeat each T) -> Void
    
    init(callback: @escaping (repeat each T) -> Void) {
        self.callback = callback // X - Type of expression is ambiguous without a type annotation
    }
}

Expected behavior

it should work similar to the code in the description

Environment

swift-driver version: 1.87.3 Apple Swift version 5.9.2 (swiftlang-5.9.2.2.56 clang-1500.1.0.2.5)
Target: arm64-apple-macosx14.0

Additional information

No response

[vanvoorden]

@NoahKamara looks like 68369.

[slavapestov]

This was fixed by #70457.