[swift-evolution] Argument labels in callbacks

Franklin Schrans f.schrans at me.com
Wed Feb 22 02:36:49 CST 2017


When SE-0111 <https://github.com/apple/swift-evolution/blob/master/proposals/0111-remove-arg-label-type-significance.md> was approved, I noticed the implication it had when using closures as callbacks:

   func foo(completion: (success: Bool) -> Void) {
     completion(success: true)

is no longer possible, because function types can’t have argument labels anymore, and the function has to be written:
   func foo(completion: (Bool) -> Void) {

which doesn’t look very nice, especially as the number of the arguments increases.

After talking to Chris Lattner about this, he referred me to this <https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20160711/024331.html> email.
I was wondering if there's been any further work or plans in restoring the use of argument labels in closures.

- Franklin
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