llvm-project/libcxx/include/__compare/compare_strong_order_fallback.h
Louis Dionne 9783f28cbb
[libc++] Format the code base (#74334)
This patch runs clang-format on all of libcxx/include and libcxx/src, in
accordance with the RFC discussed at [1]. Follow-up patches will format
the benchmarks, the test suite and remaining parts of the code. I'm
splitting this one into its own patch so the diff is a bit easier to
review.

This patch was generated with:

   find libcxx/include libcxx/src -type f \
      | grep -v 'module.modulemap.in' \
      | grep -v 'CMakeLists.txt' \
      | grep -v 'README.txt' \
      | grep -v 'libcxx.imp' \
      | grep -v '__config_site.in' \
      | xargs clang-format -i

A Git merge driver is available in libcxx/utils/clang-format-merge-driver.sh
to help resolve merge and rebase issues across these formatting changes.

[1]: https://discourse.llvm.org/t/rfc-clang-formatting-all-of-libc-once-and-for-all
2023-12-18 14:01:33 -05:00

74 lines
2.9 KiB
C++

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___COMPARE_COMPARE_STRONG_ORDER_FALLBACK
#define _LIBCPP___COMPARE_COMPARE_STRONG_ORDER_FALLBACK
#include <__compare/ordering.h>
#include <__compare/strong_order.h>
#include <__config>
#include <__type_traits/decay.h>
#include <__type_traits/is_same.h>
#include <__utility/forward.h>
#include <__utility/priority_tag.h>
#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
#if _LIBCPP_STD_VER >= 20
// [cmp.alg]
namespace __compare_strong_order_fallback {
struct __fn {
template <class _Tp, class _Up>
requires is_same_v<decay_t<_Tp>, decay_t<_Up>>
_LIBCPP_HIDE_FROM_ABI static constexpr auto __go(_Tp&& __t, _Up&& __u, __priority_tag<1>) noexcept(
noexcept(std::strong_order(std::forward<_Tp>(__t), std::forward<_Up>(__u))))
-> decltype(std::strong_order(std::forward<_Tp>(__t), std::forward<_Up>(__u))) {
return std::strong_order(std::forward<_Tp>(__t), std::forward<_Up>(__u));
}
template <class _Tp, class _Up>
requires is_same_v<decay_t<_Tp>, decay_t<_Up>>
_LIBCPP_HIDE_FROM_ABI static constexpr auto __go(_Tp&& __t, _Up&& __u, __priority_tag<0>) noexcept(noexcept(
std::forward<_Tp>(__t) == std::forward<_Up>(__u) ? strong_ordering::equal
: std::forward<_Tp>(__t) < std::forward<_Up>(__u)
? strong_ordering::less
: strong_ordering::greater))
-> decltype(std::forward<_Tp>(__t) == std::forward<_Up>(__u) ? strong_ordering::equal
: std::forward<_Tp>(__t) < std::forward<_Up>(__u)
? strong_ordering::less
: strong_ordering::greater) {
return std::forward<_Tp>(__t) == std::forward<_Up>(__u) ? strong_ordering::equal
: std::forward<_Tp>(__t) < std::forward<_Up>(__u)
? strong_ordering::less
: strong_ordering::greater;
}
template <class _Tp, class _Up>
_LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp&& __t, _Up&& __u) const
noexcept(noexcept(__go(std::forward<_Tp>(__t), std::forward<_Up>(__u), __priority_tag<1>())))
-> decltype(__go(std::forward<_Tp>(__t), std::forward<_Up>(__u), __priority_tag<1>())) {
return __go(std::forward<_Tp>(__t), std::forward<_Up>(__u), __priority_tag<1>());
}
};
} // namespace __compare_strong_order_fallback
inline namespace __cpo {
inline constexpr auto compare_strong_order_fallback = __compare_strong_order_fallback::__fn{};
} // namespace __cpo
#endif // _LIBCPP_STD_VER >= 20
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___COMPARE_COMPARE_STRONG_ORDER_FALLBACK