Open Radar

 
Summary:
The naming rules for parameters are messed up with curried functions.

Steps to Reproduce:
Define the following three functions:

func const<A, B>(a: A)(b: B) -> A {
    return a
}

func foo<A, B>(a: A, b: B) -> A {
    return a
}

func bar<A, B>(a: A) -> B -> A {
    return { _ in a }
}


Expected Results:
I should be able to call the functions like:

const(4)(1)
foo(4, 5)
bar(4)(3)

Actual Results:
I have to actually provide the name for the second parameter for the func “const”.

const(4)(b: 1)
foo(4, 5)
bar(4)(3)

Further, defining the function const as:

func const<A, B>(a: A)(_ b: B) -> A { … }

That results in a compiler warning for the argument name and a compiler error for:

const(4)(1)

Regression:
Yes, I believe I was able to do this in earlier builds.

Notes:
Provide additional information, such as references to related problems, workarounds and relevant attachments.