| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| extension String.UTF16View.Index { |
| /// Construct from an integer offset. |
| @available(swift, deprecated: 3.2) |
| @available(swift, obsoleted: 4.0) |
| public init(_ offset: Int) { |
| assert(offset >= 0, "Negative UTF16 index offset not allowed") |
| self.init(encodedOffset: offset) |
| } |
| |
| @available(swift, deprecated: 3.2) |
| @available(swift, obsoleted: 4.0) |
| public func distance(to other: String.UTF16View.Index?) -> Int { |
| return _offset.distance(to: other!._offset) |
| } |
| |
| @available(swift, deprecated: 3.2) |
| @available(swift, obsoleted: 4.0) |
| public func advanced(by n: Int) -> String.UTF16View.Index { |
| return String.UTF16View.Index(_offset.advanced(by: n)) |
| } |
| } |
