| //===----------------------------------------------------------------------===// |
| // |
| // This source file is part of the Swift.org open source project |
| // |
| // Copyright (c) 2014 - 2018 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| @_exported import NaturalLanguage |
| import Foundation |
| |
| @available(macOS 10.14, iOS 12.0, watchOS 5.0, tvOS 12.0, *) |
| extension NLTokenizer { |
| @nonobjc |
| public func tokenRange(at index: String.Index) -> Range<String.Index> { |
| let str = self.string ?? "" |
| let characterIndex = index.encodedOffset |
| let nsrange = self.__tokenRange(at:characterIndex) |
| return Range(nsrange, in: str)! |
| } |
| |
| @nonobjc |
| public func enumerateTokens(in range: Range<String.Index>, using block: (Range<String.Index>, NLTokenizer.Attributes) -> Bool) { |
| guard let str = self.string else { return } |
| let nsrange = NSRange(range, in: str) |
| self.__enumerateTokens(in: nsrange) { (tokenNSRange, attrs, stop) in |
| if let tokenRange = Range(tokenNSRange, in:str) { |
| let keepGoing = block(tokenRange, attrs) |
| if (!keepGoing) { |
| stop.pointee = true |
| } |
| } |
| } |
| } |
| |
| @nonobjc |
| public func tokens(for range: Range<String.Index>) -> [Range<String.Index>] { |
| var array:[Range<String.Index>] = [] |
| self.enumerateTokens(in: range) { (tokenRange, attrs) -> Bool in |
| array.append(tokenRange) |
| return true |
| } |
| return array |
| } |
| } |