"Free" ReflectionDecodable conformance for CaseIterable enums

[bre7]

extension ReflectionDecodable where Self: CaseIterable {

    public static func reflectDecoded() throws -> (Self, Self) {
        guard !allCases.isEmpty, allCases.count > 1 else { throw ReflectionError() }
        guard let first = allCases.first, let last = allCases.last else { throw ReflectionError() }
        return (first, last)
    }
}

4.2 PR ?

[tanner0101]

Yes, please!