libcxx/include/__iterator/reverse_access.h

   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
  10 #ifndef _LIBCPP___ITERATOR_REVERSE_ACCESS_H
  11 #define _LIBCPP___ITERATOR_REVERSE_ACCESS_H
  12
  13 #include <__config>
  14 #include <__iterator/reverse_iterator.h>
  15 #include <initializer_list>
  16
  17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  18 #  pragma GCC system_header
  19 #endif
  20
  21 _LIBCPP_BEGIN_NAMESPACE_STD
  22
  23 #if _LIBCPP_STD_VER >= 14
  24
  25 template <class _Tp, size_t _Np>
  26 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) {
  27   return reverse_iterator<_Tp*>(__array + _Np);
  28 }
  29
  30 template <class _Tp, size_t _Np>
  31 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) {
  32   return reverse_iterator<_Tp*>(__array);
  33 }
  34
  35 template <class _Ep>
  36 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) {
  37   return reverse_iterator<const _Ep*>(__il.end());
  38 }
  39
  40 template <class _Ep>
  41 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) {
  42   return reverse_iterator<const _Ep*>(__il.begin());
  43 }
  44
  45 template <class _Cp>
  46 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) {
  47   return __c.rbegin();
  48 }
  49
  50 template <class _Cp>
  51 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) {
  52   return __c.rbegin();
  53 }
  54
  55 template <class _Cp>
  56 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 auto rend(_Cp& __c) -> decltype(__c.rend()) {
  57   return __c.rend();
  58 }
  59
  60 template <class _Cp>
  61 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 auto rend(const _Cp& __c) -> decltype(__c.rend()) {
  62   return __c.rend();
  63 }
  64
  65 template <class _Cp>
  66 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 auto crbegin(const _Cp& __c) -> decltype(std::rbegin(__c)) {
  67   return std::rbegin(__c);
  68 }
  69
  70 template <class _Cp>
  71 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX17 auto crend(const _Cp& __c) -> decltype(std::rend(__c)) {
  72   return std::rend(__c);
  73 }
  74
  75 #endif // _LIBCPP_STD_VER >= 14
  76
  77 _LIBCPP_END_NAMESPACE_STD
  78
  79 #endif // _LIBCPP___ITERATOR_REVERSE_ACCESS_H