> On Mar 25, 2016, at 2:51 PM, Jason Sadler via swift-users
> <swift-users@swift.org> wrote:
>
> (My particular use case can be seen here:
> https://gist.github.com/sadlerjw/2cc16b4375b02fe7f400
> <https://gist.github.com/sadlerjw/2cc16b4375b02fe7f400> … and the best
> information I’ve been able to find on this so far is here:
> http://stackoverflow.com/questions/33112559/protocol-doesnt-conform-to-itself/33524927#33524927
>
> <http://stackoverflow.com/questions/33112559/protocol-doesnt-conform-to-itself/33524927#33524927>)
Here is the best you can do for your particular use case:
protocol AnyEquatable { func equals(other: Any) -> Bool }
func ==<T: Equatable>(lhs: T, rhs: Any) -> Bool {
if let rhs = rhs as? T { return lhs == rhs } else { return false }
}
extension Bool: AnyEquatable { func equals(other: Any) -> Bool { return self
== other } }
extension Int: AnyEquatable { func equals(other: Any) -> Bool { return self
== other } }
extension Double: AnyEquatable { func equals(other: Any) -> Bool { return self
== other } }
extension String: AnyEquatable { func equals(other: Any) -> Bool { return self
== other } }
extension Array {
func indexOfAny(element : AnyEquatable) -> Index? { return indexOf {
element.equals($0) } }
}
var array: [Any] = [false, 1, 2.0, "three"]
array.indexOfAny(2.0)
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