chromium/third_party/libc++/src/include/__compare/ordering.h

//===----------------------------------------------------------------------===//
//
// 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_ORDERING_H
#define _LIBCPP___COMPARE_ORDERING_H

#include <__config>
#include <__type_traits/enable_if.h>
#include <__type_traits/is_same.h>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

_LIBCPP_BEGIN_NAMESPACE_STD

#if _LIBCPP_STD_VER >= 20

// exposition only
enum class _OrdResult : signed char { … };

enum class _NCmpResult : signed char { … };

class partial_ordering;
class weak_ordering;
class strong_ordering;

struct _CmpUnspecifiedParam { … };

class partial_ordering { … };

inline constexpr partial_ordering partial_ordering::less(_OrdResult::__less);
inline constexpr partial_ordering partial_ordering::equivalent(_OrdResult::__equiv);
inline constexpr partial_ordering partial_ordering::greater(_OrdResult::__greater);
inline constexpr partial_ordering partial_ordering::unordered(_NCmpResult ::__unordered);

class weak_ordering { … };

inline constexpr weak_ordering weak_ordering::less(_OrdResult::__less);
inline constexpr weak_ordering weak_ordering::equivalent(_OrdResult::__equiv);
inline constexpr weak_ordering weak_ordering::greater(_OrdResult::__greater);

class strong_ordering { … };

inline constexpr strong_ordering strong_ordering::less(_OrdResult::__less);
inline constexpr strong_ordering strong_ordering::equal(_OrdResult::__equiv);
inline constexpr strong_ordering strong_ordering::equivalent(_OrdResult::__equiv);
inline constexpr strong_ordering strong_ordering::greater(_OrdResult::__greater);

/// [cmp.categories.pre]/1
/// The types partial_ordering, weak_ordering, and strong_ordering are
/// collectively termed the comparison category types.
__comparison_category;

#endif // _LIBCPP_STD_VER >= 20

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP___COMPARE_ORDERING_H