106c3fb27SDimitry Andric //===----------------------------------------------------------------------===// 206c3fb27SDimitry Andric // 306c3fb27SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 406c3fb27SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 506c3fb27SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 606c3fb27SDimitry Andric // 706c3fb27SDimitry Andric //===----------------------------------------------------------------------===// 806c3fb27SDimitry Andric 906c3fb27SDimitry Andric #ifndef _LIBCPP___TUPLE_TUPLE_LIKE_H 1006c3fb27SDimitry Andric #define _LIBCPP___TUPLE_TUPLE_LIKE_H 1106c3fb27SDimitry Andric 1206c3fb27SDimitry Andric #include <__config> 1306c3fb27SDimitry Andric #include <__fwd/subrange.h> 14*0fca6ea1SDimitry Andric #include <__tuple/tuple_like_no_subrange.h> 15*0fca6ea1SDimitry Andric #include <__tuple/tuple_size.h> 1606c3fb27SDimitry Andric #include <__type_traits/remove_cvref.h> 1706c3fb27SDimitry Andric 1806c3fb27SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 1906c3fb27SDimitry Andric # pragma GCC system_header 2006c3fb27SDimitry Andric #endif 2106c3fb27SDimitry Andric 2206c3fb27SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 2306c3fb27SDimitry Andric 2406c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 2506c3fb27SDimitry Andric 2606c3fb27SDimitry Andric template <class _Tp> 27*0fca6ea1SDimitry Andric inline constexpr bool __is_ranges_subrange_v = false; 2806c3fb27SDimitry Andric 29*0fca6ea1SDimitry Andric template <class _Iter, class _Sent, ranges::subrange_kind _Kind> 30*0fca6ea1SDimitry Andric inline constexpr bool __is_ranges_subrange_v<ranges::subrange<_Iter, _Sent, _Kind>> = true; 3106c3fb27SDimitry Andric 3206c3fb27SDimitry Andric template <class _Tp> 33*0fca6ea1SDimitry Andric concept __tuple_like = __tuple_like_no_subrange<_Tp> || __is_ranges_subrange_v<remove_cvref_t<_Tp>>; 34*0fca6ea1SDimitry Andric 35*0fca6ea1SDimitry Andric // As of writing this comment every use of `pair-like` in the standard excludes `ranges::subrange`, so 36*0fca6ea1SDimitry Andric // you most likely want to use `__pair_like_no_subrange` if you're looking for `pair-like`. 3706c3fb27SDimitry Andric 3806c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 3906c3fb27SDimitry Andric 4006c3fb27SDimitry Andric _LIBCPP_END_NAMESPACE_STD 4106c3fb27SDimitry Andric 4206c3fb27SDimitry Andric #endif // _LIBCPP___TUPLE_TUPLE_LIKE_H 43