| //===--- Index.swift - A position in a Collection -------------------------===// |
| // |
| // This source file is part of the Swift.org open source project |
| // |
| // Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors |
| // Licensed under Apache License v2.0 with Runtime Library Exception |
| // |
| // See https://swift.org/LICENSE.txt for license information |
| // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors |
| // |
| //===----------------------------------------------------------------------===// |
| |
| /// This protocol is an implementation detail of `Integer`; do not use it |
| /// directly. |
| @_show_in_interface |
| // FIXME(ABI): Is it used elsewhere? |
| public protocol _Incrementable : Equatable {} |
