Swift Evolution,
Swift's API Design Guidelines are really good in my opinion, but I believe
there is
ambiguity with current trailing closure syntax.
Take for example if there were three variations of a `subscribe`function:
func subscribe(onNext block: @escaping (Event) -> Void) { ... }
func subscribe(onError block: @escaping (Event) -> Void) { ... }
func subscribe(onCompleted block: @escaping (Event) -> Void) { ... }
Since using subscribe with trailing closure syntax would cause ambiguity:
subscribe { event in ... }
The only option available is to call the function as normal:
subscribe(onNext: { event in ... })
Since these functions are distinguished by their argument label, if a
variation of trailing closure syntax were introduced that provided the
option of using an argument label in parenthesis this ambiguity would
disappear.
something like this:
subscribe(onNext:) { event in ... }
would allow using trailing closure syntax in this case.
Just a thought, I personally think having this change to the language would
be worthwhile but would love to hear the community's opinion.
- Nick
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