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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support for C++03 for Zig due to the first change; it would be insane to ship 1018 duplicate header files just for this outdated use case.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.
54 lines
1.6 KiB
C++
Vendored
54 lines
1.6 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___ALGORITHM_COMP_H
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#define _LIBCPP___ALGORITHM_COMP_H
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#include <__config>
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#include <__type_traits/desugars_to.h>
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#include <__type_traits/is_integral.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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struct __equal_to {
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template <class _T1, class _T2>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 bool operator()(const _T1& __x, const _T2& __y) const {
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return __x == __y;
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}
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};
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template <class _Tp, class _Up>
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inline const bool __desugars_to_v<__equal_tag, __equal_to, _Tp, _Up> = true;
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// The definition is required because __less is part of the ABI, but it's empty
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// because all comparisons should be transparent.
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template <class _T1 = void, class _T2 = _T1>
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struct __less {};
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template <>
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struct __less<void, void> {
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template <class _Tp, class _Up>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 bool operator()(const _Tp& __lhs, const _Up& __rhs) const {
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return __lhs < __rhs;
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}
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};
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template <class _Tp>
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inline const bool __desugars_to_v<__less_tag, __less<>, _Tp, _Tp> = true;
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template <class _Tp>
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inline const bool __desugars_to_v<__totally_ordered_less_tag, __less<>, _Tp, _Tp> = is_integral<_Tp>::value;
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ALGORITHM_COMP_H
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