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0001 // -*- C++ -*-
0002 //===----------------------------------------------------------------------===//
0003 //
0004 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0005 // See https://llvm.org/LICENSE.txt for license information.
0006 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0007 //
0008 //===----------------------------------------------------------------------===//
0009
0010 #ifndef _LIBCPP___CXX03_SYSTEM_ERROR
0011 #define _LIBCPP___CXX03_SYSTEM_ERROR
0012
0013 /*
0014 system_error synopsis
0015
0016 namespace std
0017 {
0018
0019 class error_category
0020 {
0021 public:
0022 virtual ~error_category() noexcept;
0023
0024 constexpr error_category();
0025 error_category(const error_category&) = delete;
0026 error_category& operator=(const error_category&) = delete;
0027
0028 virtual const char* name() const noexcept = 0;
0029 virtual error_condition default_error_condition(int ev) const noexcept;
0030 virtual bool equivalent(int code, const error_condition& condition) const noexcept;
0031 virtual bool equivalent(const error_code& code, int condition) const noexcept;
0032 virtual string message(int ev) const = 0;
0033
0034 bool operator==(const error_category& rhs) const noexcept;
0035 bool operator!=(const error_category& rhs) const noexcept; // removed in C++20
0036 bool operator<(const error_category& rhs) const noexcept; // removed in C++20
0037 strong_ordering operator<=>(const error_category& rhs) const noexcept; // C++20
0038 };
0039
0040 const error_category& generic_category() noexcept;
0041 const error_category& system_category() noexcept;
0042
0043 template <class T> struct is_error_code_enum
0044 : public false_type {};
0045
0046 template <class T> struct is_error_condition_enum
0047 : public false_type {};
0048
0049 template <class _Tp>
0050 inline constexpr bool is_error_condition_enum_v = is_error_condition_enum<_Tp>::value; // C++17
0051
0052 template <class _Tp>
0053 inline constexpr bool is_error_code_enum_v = is_error_code_enum<_Tp>::value; // C++17
0054
0055 class error_code
0056 {
0057 public:
0058 // constructors:
0059 error_code() noexcept;
0060 error_code(int val, const error_category& cat) noexcept;
0061 template <class ErrorCodeEnum>
0062 error_code(ErrorCodeEnum e) noexcept;
0063
0064 // modifiers:
0065 void assign(int val, const error_category& cat) noexcept;
0066 template <class ErrorCodeEnum>
0067 error_code& operator=(ErrorCodeEnum e) noexcept;
0068 void clear() noexcept;
0069
0070 // observers:
0071 int value() const noexcept;
0072 const error_category& category() const noexcept;
0073 error_condition default_error_condition() const noexcept;
0074 string message() const;
0075 explicit operator bool() const noexcept;
0076 };
0077
0078 // non-member functions:
0079 template <class charT, class traits>
0080 basic_ostream<charT,traits>&
0081 operator<<(basic_ostream<charT,traits>& os, const error_code& ec);
0082
0083 class error_condition
0084 {
0085 public:
0086 // constructors:
0087 error_condition() noexcept;
0088 error_condition(int val, const error_category& cat) noexcept;
0089 template <class ErrorConditionEnum>
0090 error_condition(ErrorConditionEnum e) noexcept;
0091
0092 // modifiers:
0093 void assign(int val, const error_category& cat) noexcept;
0094 template <class ErrorConditionEnum>
0095 error_condition& operator=(ErrorConditionEnum e) noexcept;
0096 void clear() noexcept;
0097
0098 // observers:
0099 int value() const noexcept;
0100 const error_category& category() const noexcept;
0101 string message() const noexcept;
0102 explicit operator bool() const noexcept;
0103 };
0104
0105 class system_error
0106 : public runtime_error
0107 {
0108 public:
0109 system_error(error_code ec, const string& what_arg);
0110 system_error(error_code ec, const char* what_arg);
0111 system_error(error_code ec);
0112 system_error(int ev, const error_category& ecat, const string& what_arg);
0113 system_error(int ev, const error_category& ecat, const char* what_arg);
0114 system_error(int ev, const error_category& ecat);
0115
0116 const error_code& code() const noexcept;
0117 const char* what() const noexcept;
0118 };
0119
0120 template <> struct is_error_condition_enum<errc>
0121 : true_type { }
0122
0123 error_code make_error_code(errc e) noexcept;
0124 error_condition make_error_condition(errc e) noexcept;
0125
0126 // Comparison operators:
0127 bool operator==(const error_code& lhs, const error_code& rhs) noexcept;
0128 bool operator==(const error_code& lhs, const error_condition& rhs) noexcept;
0129 bool operator==(const error_condition& lhs, const error_code& rhs) noexcept; // removed in C++20
0130 bool operator==(const error_condition& lhs, const error_condition& rhs) noexcept;
0131 bool operator!=(const error_code& lhs, const error_code& rhs) noexcept; // removed in C++20
0132 bool operator!=(const error_code& lhs, const error_condition& rhs) noexcept; // removed in C++20
0133 bool operator!=(const error_condition& lhs, const error_code& rhs) noexcept; // removed in C++20
0134 bool operator!=(const error_condition& lhs, const error_condition& rhs) noexcept; // removed in C++20
0135 bool operator<(const error_condition& lhs, const error_condition& rhs) noexcept; // removed in C++20
0136 bool operator<(const error_code& lhs, const error_code& rhs) noexcept; // removed in C++20
0137 strong_ordering operator<=>(const error_code& lhs, const error_code& rhs) noexcept; // C++20
0138 strong_ordering operator<=>(const error_condition& lhs, const error_condition& rhs) noexcept; // C++20
0139
0140 template <> struct hash<std::error_code>;
0141 template <> struct hash<std::error_condition>;
0142
0143 } // std
0144
0145 */
0146
0147 #include <__cxx03/__config>
0148 #include <__cxx03/__system_error/errc.h>
0149 #include <__cxx03/__system_error/error_category.h>
0150 #include <__cxx03/__system_error/error_code.h>
0151 #include <__cxx03/__system_error/error_condition.h>
0152 #include <__cxx03/__system_error/system_error.h>
0153 #include <__cxx03/version>
0154
0155 // standard-mandated includes
0156
0157 // [system.error.syn]
0158 #include <__cxx03/compare>
0159
0160 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0161 # pragma GCC system_header
0162 #endif
0163
0164 #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
0165 # include <__cxx03/cstdint>
0166 # include <__cxx03/cstring>
0167 # include <__cxx03/limits>
0168 # include <__cxx03/type_traits>
0169 #endif
0170
0171 #endif // _LIBCPP___CXX03_SYSTEM_ERROR
