chromium/third_party/libc++/src/include/__system_error/error_condition.h

// -*- 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___SYSTEM_ERROR_ERROR_CONDITION_H
#define _LIBCPP___SYSTEM_ERROR_ERROR_CONDITION_H

#include <__compare/ordering.h>
#include <__config>
#include <__functional/hash.h>
#include <__functional/unary_function.h>
#include <__system_error/errc.h>
#include <__system_error/error_category.h>
#include <cstddef>
#include <string>

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

_LIBCPP_BEGIN_NAMESPACE_STD

template <class _Tp>
struct _LIBCPP_TEMPLATE_VIS is_error_condition_enum : public false_type { … };

#if _LIBCPP_STD_VER >= 17
is_error_condition_enum_v;
#endif

template <>
struct _LIBCPP_TEMPLATE_VIS is_error_condition_enum<errc> : true_type { … };

#ifdef _LIBCPP_CXX03_LANG
template <>
struct _LIBCPP_TEMPLATE_VIS is_error_condition_enum<errc::__lx> : true_type {};
#endif

namespace __adl_only {
// Those cause ADL to trigger but they are not viable candidates,
// so they are never actually selected.
void make_error_condition() = delete;
} // namespace __adl_only

class _LIBCPP_EXPORTED_FROM_ABI error_condition { … };

inline _LIBCPP_HIDE_FROM_ABI error_condition make_error_condition(errc __e) _NOEXCEPT { … }

inline _LIBCPP_HIDE_FROM_ABI bool operator==(const error_condition& __x, const error_condition& __y) _NOEXCEPT { … }

#if _LIBCPP_STD_VER <= 17

inline _LIBCPP_HIDE_FROM_ABI bool operator!=(const error_condition& __x, const error_condition& __y) _NOEXCEPT {
  return !(__x == __y);
}

inline _LIBCPP_HIDE_FROM_ABI bool operator<(const error_condition& __x, const error_condition& __y) _NOEXCEPT {
  return __x.category() < __y.category() || (__x.category() == __y.category() && __x.value() < __y.value());
}

#else // _LIBCPP_STD_VER <= 17

inline _LIBCPP_HIDE_FROM_ABI strong_ordering
operator<=>(const error_condition& __x, const error_condition& __y) noexcept { … }

#endif // _LIBCPP_STD_VER <= 17

template <>
struct _LIBCPP_TEMPLATE_VIS hash<error_condition> : public __unary_function<error_condition, size_t> { … };

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP___SYSTEM_ERROR_ERROR_CONDITION_H