Closure property that throws Typed Error in Swift 6 result in compiling error

Quedlinbug · June 13, 2024, 6:44am

There are problems with implicit typing. The Swift 6 Language Mode does not help. But so far, I've found that you can get around them with explicitness.

The next paragraph of the proposal:

Note that one can explicitly specify the thrown error type of a closure to disable this type inference, which has the nice effect of also providing a contextual type for throw statements:
{ () throws(CatError) in
    if Int.random(in: 0..<24) < 20 {
       throw .asleep
    }
}

let example = Example { () throws(TypedError) in throw .failed }