Open Radar

 
Summary:
Like with rdar://19091008 and initializers, enum cases are functions but you can’t get reference to them.


Steps to Reproduce:
1. Try to compile this:
enum E {
	case C(Int)
}

let f: Int -> E = E.C
let x: [E] = map([1, 2, 3], E.C)


Expected Results:
I expected it to compile and for f to be bound to the .C constructor and x to an array of type E constructed with the integers being mapped over.


Actual Results:
The compiler errors. 


Regression:
Once again, { E.C($0) } works, but is undesirable.


Notes:
The compiler actually gives a specific error for this:

error: partial application of enum constructor is not allowed

However, I haven’t the foggiest why this would constitute partial application. Are enum cases curried? What argument has been applied? This isn’t an instance method; is the _type_ getting passed into the function? That seems weird.

Either way, Swift’s support for tacit programming[1] would be improved by this.

http://en.wikipedia.org/wiki/Tacit_programming