reverse_access.h 2.4 KB

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  1. // -*- C++ -*-
  2. //===----------------------------------------------------------------------===//
  3. //
  4. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  5. // See https://llvm.org/LICENSE.txt for license information.
  6. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  7. //
  8. //===----------------------------------------------------------------------===//
  9. #ifndef _LIBCPP___ITERATOR_REVERSE_ACCESS_H
  10. #define _LIBCPP___ITERATOR_REVERSE_ACCESS_H
  11. #include <__config>
  12. #include <__iterator/reverse_iterator.h>
  13. #include <cstddef>
  14. #include <initializer_list>
  15. #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  16. # pragma GCC system_header
  17. #endif
  18. _LIBCPP_BEGIN_NAMESPACE_STD
  19. #if _LIBCPP_STD_VER >= 14
  20. template <class _Tp, size_t _Np>
  21. _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) {
  22. return reverse_iterator<_Tp*>(__array + _Np);
  23. }
  24. template <class _Tp, size_t _Np>
  25. _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) {
  26. return reverse_iterator<_Tp*>(__array);
  27. }
  28. template <class _Ep>
  29. _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) {
  30. return reverse_iterator<const _Ep*>(__il.end());
  31. }
  32. template <class _Ep>
  33. _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) {
  34. return reverse_iterator<const _Ep*>(__il.begin());
  35. }
  36. template <class _Cp>
  37. _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) {
  38. return __c.rbegin();
  39. }
  40. template <class _Cp>
  41. _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) {
  42. return __c.rbegin();
  43. }
  44. template <class _Cp>
  45. _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 auto rend(_Cp& __c) -> decltype(__c.rend()) {
  46. return __c.rend();
  47. }
  48. template <class _Cp>
  49. _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 auto rend(const _Cp& __c) -> decltype(__c.rend()) {
  50. return __c.rend();
  51. }
  52. template <class _Cp>
  53. _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 auto crbegin(const _Cp& __c) -> decltype(std::rbegin(__c)) {
  54. return std::rbegin(__c);
  55. }
  56. template <class _Cp>
  57. _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 auto crend(const _Cp& __c) -> decltype(std::rend(__c)) {
  58. return std::rend(__c);
  59. }
  60. #endif // _LIBCPP_STD_VER >= 14
  61. _LIBCPP_END_NAMESPACE_STD
  62. #endif // _LIBCPP___ITERATOR_REVERSE_ACCESS_H