[swift-users] Capturing references to initializers?
Austin Zheng
austinzheng at gmail.com
Thu Dec 10 16:41:39 CST 2015
Hello Swift users,
I have a question about capturing references to initializers. You can do
the following right now:
struct Foo {
let number : Int
// This type has a single initializer
init() {
number = 10
}
}
let a = Foo.init // a's type: () -> Foo
So far so good. Now, let's add in a second initializer:
extension Foo {
init(customNumber: Int) {
number = customNumber
}
}
Now, if you want to capture a reference to one of the initializers, you can
annotate the variable with the explicit function type:
let a : () -> Foo = Foo.init
let b : Int -> Foo = Foo.init
My question involves the case where you have multiple initializers that
take the same arguments and types. How would you capture initializers then?
extension Foo {
init(numberToInc: Int) {
number = numberToInc + 1
}
}
How do I capture a reference to the numberToInc: initializer, versus the
customNumber: initializer?
Best regards,
Austin
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