import Base // Instantiate Counter, relying on Counter's adoption of ForwardIndex. public struct OneToAThousand : Collection { public typealias Element = Int public typealias Index = Counter public var startIndex: Index { return Index(value: 1) } public var endIndex: Index { return Index(value: 1001) } public subscript(i: Index) -> Element { return i.value } public init() {} } public protocol SpecialProto : IntegerLiteralConvertible {} extension Int : SpecialProto {}