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___TUPLE_TUPLE_LIKE_EXT_H
10#define _LIBCPP___TUPLE_TUPLE_LIKE_EXT_H
11
12#include <__config>
13#include <__cstddef/size_t.h>
14#include <__fwd/array.h>
15#include <__fwd/pair.h>
16#include <__fwd/tuple.h>
17#include <__tuple/tuple_types.h>
18#include <__type_traits/integral_constant.h>
19
20#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
21# pragma GCC system_header
22#endif
23
24_LIBCPP_BEGIN_NAMESPACE_STD
25
26template <class _Tp>
27struct __tuple_like_ext : false_type {};
28
29template <class _Tp>
30struct __tuple_like_ext<const _Tp> : public __tuple_like_ext<_Tp> {};
31template <class _Tp>
32struct __tuple_like_ext<volatile _Tp> : public __tuple_like_ext<_Tp> {};
33template <class _Tp>
34struct __tuple_like_ext<const volatile _Tp> : public __tuple_like_ext<_Tp> {};
35
36#ifndef _LIBCPP_CXX03_LANG
37template <class... _Tp>
38struct __tuple_like_ext<tuple<_Tp...> > : true_type {};
39#endif
40
41template <class _T1, class _T2>
42struct __tuple_like_ext<pair<_T1, _T2> > : true_type {};
43
44template <class _Tp, size_t _Size>
45struct __tuple_like_ext<array<_Tp, _Size> > : true_type {};
46
47template <class... _Tp>
48struct __tuple_like_ext<__tuple_types<_Tp...> > : true_type {};
49
50_LIBCPP_END_NAMESPACE_STD
51
52#endif // _LIBCPP___TUPLE_TUPLE_LIKE_EXT_H
53