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_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 typename tuple_element<_Ip, tuple<_Tp...> >::type&
31 get(tuple<_Tp...>&) _NOEXCEPT;
32 
33 template <size_t _Ip, class... _Tp>
34 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const typename tuple_element<_Ip, tuple<_Tp...> >::type&
35 get(const tuple<_Tp...>&) _NOEXCEPT;
36 
37 template <size_t _Ip, class... _Tp>
38 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 typename tuple_element<_Ip, tuple<_Tp...> >::type&&
39 get(tuple<_Tp...>&&) _NOEXCEPT;
40 
41 template <size_t _Ip, class... _Tp>
42 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const typename tuple_element<_Ip, tuple<_Tp...> >::type&&
43 get(const tuple<_Tp...>&&) _NOEXCEPT;
44 
45 #endif //_LIBCPP_CXX03_LANG
46 
47 template <size_t _Ip, class _T1, class _T2>
48 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 typename tuple_element<_Ip, pair<_T1, _T2> >::type&
49 get(pair<_T1, _T2>&) _NOEXCEPT;
50 
51 template <size_t _Ip, class _T1, class _T2>
52 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const typename tuple_element<_Ip, pair<_T1, _T2> >::type&
53 get(const pair<_T1, _T2>&) _NOEXCEPT;
54 
55 #ifndef _LIBCPP_CXX03_LANG
56 template <size_t _Ip, class _T1, class _T2>
57 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 typename tuple_element<_Ip, pair<_T1, _T2> >::type&&
58 get(pair<_T1, _T2>&&) _NOEXCEPT;
59 
60 template <size_t _Ip, class _T1, class _T2>
61 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const typename tuple_element<_Ip, pair<_T1, _T2> >::type&&
62 get(const pair<_T1, _T2>&&) _NOEXCEPT;
63 #endif
64 
65 template <size_t _Ip, class _Tp, size_t _Size>
66 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Tp& get(array<_Tp, _Size>&) _NOEXCEPT;
67 
68 template <size_t _Ip, class _Tp, size_t _Size>
69 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const _Tp& get(const array<_Tp, _Size>&) _NOEXCEPT;
70 
71 #ifndef _LIBCPP_CXX03_LANG
72 template <size_t _Ip, class _Tp, size_t _Size>
73 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Tp&& get(array<_Tp, _Size>&&) _NOEXCEPT;
74 
75 template <size_t _Ip, class _Tp, size_t _Size>
76 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const _Tp&& get(const array<_Tp, _Size>&&) _NOEXCEPT;
77 #endif
78 
79 #if _LIBCPP_STD_VER >= 20
80 
81 namespace ranges {
82 
83 template <size_t _Index, class _Iter, class _Sent, subrange_kind _Kind>
84   requires((_Index == 0 && copyable<_Iter>) || _Index == 1)
85 _LIBCPP_HIDE_FROM_ABI constexpr auto get(const subrange<_Iter, _Sent, _Kind>& __subrange);
86 
87 template <size_t _Index, class _Iter, class _Sent, subrange_kind _Kind>
88   requires(_Index < 2)
89 _LIBCPP_HIDE_FROM_ABI constexpr auto get(subrange<_Iter, _Sent, _Kind>&& __subrange);
90 
91 } // namespace ranges
92 
93 using ranges::get;
94 
95 #endif // _LIBCPP_STD_VER >= 20
96 
97 _LIBCPP_END_NAMESPACE_STD
98 
99 #endif // _LIBCPP___FWD_GET_H
100