libcxx/include/__fwd/get.h

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef _LIBCPP___FWD_GET_H
  10 #define _LIBCPP___FWD_GET_H
  11
  12 #include <__concepts/copyable.h>
  13 #include <__config>
  14 #include <__fwd/array.h>
  15 #include <__fwd/pair.h>
  16 #include <__fwd/subrange.h>
  17 #include <__fwd/tuple.h>
  18 #include <__tuple/tuple_element.h>
  19 #include <cstddef>
  20
  21 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  22 #  pragma GCC system_header
  23 #endif
  24
  25 _LIBCPP_BEGIN_NAMESPACE_STD
  26
  27 #ifndef _LIBCPP_CXX03_LANG
  28
  29 template <size_t _Ip, class ..._Tp>
  30 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  31 typename tuple_element<_Ip, tuple<_Tp...> >::type&
  32 get(tuple<_Tp...>&) _NOEXCEPT;
  33
  34 template <size_t _Ip, class ..._Tp>
  35 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  36 const typename tuple_element<_Ip, tuple<_Tp...> >::type&
  37 get(const tuple<_Tp...>&) _NOEXCEPT;
  38
  39 template <size_t _Ip, class ..._Tp>
  40 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  41 typename tuple_element<_Ip, tuple<_Tp...> >::type&&
  42 get(tuple<_Tp...>&&) _NOEXCEPT;
  43
  44 template <size_t _Ip, class ..._Tp>
  45 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  46 const typename tuple_element<_Ip, tuple<_Tp...> >::type&&
  47 get(const tuple<_Tp...>&&) _NOEXCEPT;
  48
  49 #endif //_LIBCPP_CXX03_LANG
  50
  51 template <size_t _Ip, class _T1, class _T2>
  52 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  53 typename tuple_element<_Ip, pair<_T1, _T2> >::type&
  54 get(pair<_T1, _T2>&) _NOEXCEPT;
  55
  56 template <size_t _Ip, class _T1, class _T2>
  57 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  58 const typename tuple_element<_Ip, pair<_T1, _T2> >::type&
  59 get(const pair<_T1, _T2>&) _NOEXCEPT;
  60
  61 #ifndef _LIBCPP_CXX03_LANG
  62 template <size_t _Ip, class _T1, class _T2>
  63 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  64 typename tuple_element<_Ip, pair<_T1, _T2> >::type&&
  65 get(pair<_T1, _T2>&&) _NOEXCEPT;
  66
  67 template <size_t _Ip, class _T1, class _T2>
  68 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  69 const typename tuple_element<_Ip, pair<_T1, _T2> >::type&&
  70 get(const pair<_T1, _T2>&&) _NOEXCEPT;
  71 #endif
  72
  73 template <size_t _Ip, class _Tp, size_t _Size>
  74 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  75 _Tp&
  76 get(array<_Tp, _Size>&) _NOEXCEPT;
  77
  78 template <size_t _Ip, class _Tp, size_t _Size>
  79 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  80 const _Tp&
  81 get(const array<_Tp, _Size>&) _NOEXCEPT;
  82
  83 #ifndef _LIBCPP_CXX03_LANG
  84 template <size_t _Ip, class _Tp, size_t _Size>
  85 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  86 _Tp&&
  87 get(array<_Tp, _Size>&&) _NOEXCEPT;
  88
  89 template <size_t _Ip, class _Tp, size_t _Size>
  90 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  91 const _Tp&&
  92 get(const array<_Tp, _Size>&&) _NOEXCEPT;
  93 #endif
  94
  95 #if _LIBCPP_STD_VER >= 20
  96
  97 namespace ranges {
  98
  99 template <size_t _Index, class _Iter, class _Sent, subrange_kind _Kind>
 100   requires((_Index == 0 && copyable<_Iter>) || _Index == 1)
 101 _LIBCPP_HIDE_FROM_ABI constexpr auto get(const subrange<_Iter, _Sent, _Kind>& __subrange);
 102
 103 template <size_t _Index, class _Iter, class _Sent, subrange_kind _Kind>
 104   requires(_Index < 2)
 105 _LIBCPP_HIDE_FROM_ABI constexpr auto get(subrange<_Iter, _Sent, _Kind>&& __subrange);
 106
 107 } // namespace ranges
 108
 109 using ranges::get;
 110
 111 #endif // _LIBCPP_STD_VER >= 20
 112
 113 _LIBCPP_END_NAMESPACE_STD
 114
 115 #endif // _LIBCPP___FWD_GET_H