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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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___TUPLE_TUPLE_LIKE_H10#define _LIBCPP___TUPLE_TUPLE_LIKE_H11 12#include <__config>13#include <__fwd/subrange.h>14#include <__tuple/tuple_like_no_subrange.h>15#include <__tuple/tuple_size.h>16#include <__type_traits/remove_cvref.h>17 18#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)19# pragma GCC system_header20#endif21 22_LIBCPP_BEGIN_NAMESPACE_STD23 24#if _LIBCPP_STD_VER >= 2025 26template <class _Tp>27inline constexpr bool __is_ranges_subrange_v = false;28 29template <class _Iter, class _Sent, ranges::subrange_kind _Kind>30inline constexpr bool __is_ranges_subrange_v<ranges::subrange<_Iter, _Sent, _Kind>> = true;31 32template <class _Tp>33concept __tuple_like = __tuple_like_no_subrange<_Tp> || __is_ranges_subrange_v<remove_cvref_t<_Tp>>;34 35// As of writing this comment every use of `pair-like` in the standard excludes `ranges::subrange`, so36// you most likely want to use `__pair_like_no_subrange` if you're looking for `pair-like`.37 38#endif // _LIBCPP_STD_VER >= 2039 40_LIBCPP_END_NAMESPACE_STD41 42#endif // _LIBCPP___TUPLE_TUPLE_LIKE_H43