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 <cstddef>
  16 #include <initializer_list>
  17
  18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  19 #  pragma GCC system_header
  20 #endif
  21
  22 _LIBCPP_BEGIN_NAMESPACE_STD
  23
  24 #if _LIBCPP_STD_VER >= 14
  25
  26 template <class _Tp, size_t _Np>
  27 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
  28 reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np])
  29 {
  30     return reverse_iterator<_Tp*>(__array + _Np);
  31 }
  32
  33 template <class _Tp, size_t _Np>
  34 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
  35 reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np])
  36 {
  37     return reverse_iterator<_Tp*>(__array);
  38 }
  39
  40 template <class _Ep>
  41 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
  42 reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il)
  43 {
  44     return reverse_iterator<const _Ep*>(__il.end());
  45 }
  46
  47 template <class _Ep>
  48 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
  49 reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il)
  50 {
  51     return reverse_iterator<const _Ep*>(__il.begin());
  52 }
  53
  54 template <class _Cp>
  55 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
  56 auto rbegin(_Cp& __c) -> decltype(__c.rbegin())
  57 {
  58     return __c.rbegin();
  59 }
  60
  61 template <class _Cp>
  62 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
  63 auto rbegin(const _Cp& __c) -> decltype(__c.rbegin())
  64 {
  65     return __c.rbegin();
  66 }
  67
  68 template <class _Cp>
  69 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
  70 auto rend(_Cp& __c) -> decltype(__c.rend())
  71 {
  72     return __c.rend();
  73 }
  74
  75 template <class _Cp>
  76 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
  77 auto rend(const _Cp& __c) -> decltype(__c.rend())
  78 {
  79     return __c.rend();
  80 }
  81
  82 template <class _Cp>
  83 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
  84 auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c))
  85 {
  86     return _VSTD::rbegin(__c);
  87 }
  88
  89 template <class _Cp>
  90 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX17
  91 auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c))
  92 {
  93     return _VSTD::rend(__c);
  94 }
  95
  96 #endif // _LIBCPP_STD_VER >= 14
  97
  98 _LIBCPP_END_NAMESPACE_STD
  99
 100 #endif // _LIBCPP___ITERATOR_REVERSE_ACCESS_H