156ab87500
See: * https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319 * https://discourse.llvm.org/t/rfc-project-hand-in-hand-llvm-libc-libc-code-sharing/77701 We're dropping support for C++03 for Zig due to the first change; it would be insane to ship 1018 duplicate header files just for this outdated use case. As a result of the second change, I had to bring in a subset of the headers from llvm-libc since libc++ now depends on these. Hopefully we can continue to get away with not copying the entirety of llvm-libc.
47 lines
1.5 KiB
C++
Vendored
47 lines
1.5 KiB
C++
Vendored
//===----------------------------------------------------------------------===//
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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___COMPARE_COMPARE_THREE_WAY_RESULT_H
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#define _LIBCPP___COMPARE_COMPARE_THREE_WAY_RESULT_H
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#include <__config>
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#include <__type_traits/make_const_lvalue_ref.h>
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#include <__utility/declval.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, class, class>
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struct _LIBCPP_HIDE_FROM_ABI __compare_three_way_result {};
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template <class _Tp, class _Up>
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struct _LIBCPP_HIDE_FROM_ABI __compare_three_way_result<
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_Tp,
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_Up,
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decltype(std::declval<__make_const_lvalue_ref<_Tp>>() <=> std::declval<__make_const_lvalue_ref<_Up>>(), void())> {
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using type = decltype(std::declval<__make_const_lvalue_ref<_Tp>>() <=> std::declval<__make_const_lvalue_ref<_Up>>());
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};
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template <class _Tp, class _Up = _Tp>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_NO_SPECIALIZATIONS compare_three_way_result
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: __compare_three_way_result<_Tp, _Up, void> {};
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template <class _Tp, class _Up = _Tp>
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using compare_three_way_result_t = typename compare_three_way_result<_Tp, _Up>::type;
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#endif // _LIBCPP_STD_VER >= 20
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___COMPARE_COMPARE_THREE_WAY_RESULT_H
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