[swift-evolution] [Discussion] Default Closure Arguments

[Andrew Bennett]

I'd like to be able to do this:

func callSomething(callback: (test: (arg: Int = 4) -> Void) -> Void) {

  callback(test: { print($0) })

}


callSomething { test in

  test()

}



Ideally the default argument would be part of the closure's type signature.

If-not then it could be part of callSomething's signature, and it could
lose the defaulted arguments if passed around.

What do you think?
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