> On Oct 13, 2016, at 2:36 PM, Rick Mann via swift-users
> <swift-users@swift.org> wrote:
>
> It seems I can write this:
>
> extension String
> {
> public func deleting(prefix inPrefix: String) -> String
> public func deleting(prefix inPrefix: String) -> String?
> }
>
> But I was hoping it would do the right thing:
>
> let a = s.deleting(prefix: "foo")
> if let b = s.deleting(prefix: "foo") { }
>
> But it finds these ambiguous, and I'm not sure how to specify which I want.
The first one is truly ambiguous since either overload works. If you specify
the type of 'a', you should be able to choose one or the other:
let a: String = s.deleting(prefix: "foo")
let b: String? = s.deleting(prefix: "foo")
The `if let` should not be ambiguous, since only the Optional-returning
overload is a valid candidate. Got time to file a bug?
-Joe
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