PointerType.swift 1.1 KB

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  1. /*
  2. * Copyright 1999-2101 Alibaba Group.
  3. *
  4. * Licensed under the Apache License, Version 2.0 (the "License");
  5. * you may not use this file except in compliance with the License.
  6. * You may obtain a copy of the License at
  7. *
  8. * http://www.apache.org/licenses/LICENSE-2.0
  9. *
  10. * Unless required by applicable law or agreed to in writing, software
  11. * distributed under the License is distributed on an "AS IS" BASIS,
  12. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13. * See the License for the specific language governing permissions and
  14. * limitations under the License.
  15. */
  16. //
  17. // Created by zhouzhuo on 07/01/2017.
  18. //
  19. protocol PointerType : Equatable {
  20. associatedtype Pointee
  21. var pointer: UnsafePointer<Pointee> { get set }
  22. }
  23. extension PointerType {
  24. init<T>(pointer: UnsafePointer<T>) {
  25. func cast<T, U>(_ value: T) -> U {
  26. return unsafeBitCast(value, to: U.self)
  27. }
  28. self = cast(UnsafePointer<Pointee>(pointer))
  29. }
  30. }
  31. func == <T: PointerType>(lhs: T, rhs: T) -> Bool {
  32. return lhs.pointer == rhs.pointer
  33. }