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e2b15ec235
This essentially reverts D139270 Reviewed By: #libc, EricWF Spies: tahonermann, libcxx-commits, arichardson Differential Revision: https://reviews.llvm.org/D147519
33 lines
918 B
C++
33 lines
918 B
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___TUPLE_PAIR_LIKE_H
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#define _LIBCPP___TUPLE_PAIR_LIKE_H
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#include <__config>
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#include <__tuple/tuple_like.h>
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#include <__tuple/tuple_size.h>
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#include <__type_traits/remove_cvref.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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#if _LIBCPP_STD_VER >= 20
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template <class _Tp>
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concept __pair_like = __tuple_like<_Tp> && tuple_size<remove_cvref_t<_Tp>>::value == 2;
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#endif // _LIBCPP_STD_VER >= 20
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___TUPLE_PAIR_LIKE_H
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