490 lines
14 KiB
C++
490 lines
14 KiB
C++
// -*- C++ -*-
|
|
//===---------------------------- system_error ----------------------------===//
|
|
//
|
|
// 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
|
|
#define _LIBCPP_SYSTEM_ERROR
|
|
|
|
/*
|
|
system_error synopsis
|
|
|
|
namespace std
|
|
{
|
|
|
|
class error_category
|
|
{
|
|
public:
|
|
virtual ~error_category() noexcept;
|
|
|
|
constexpr error_category();
|
|
error_category(const error_category&) = delete;
|
|
error_category& operator=(const error_category&) = delete;
|
|
|
|
virtual const char* name() const noexcept = 0;
|
|
virtual error_condition default_error_condition(int ev) const noexcept;
|
|
virtual bool equivalent(int code, const error_condition& condition) const noexcept;
|
|
virtual bool equivalent(const error_code& code, int condition) const noexcept;
|
|
virtual string message(int ev) const = 0;
|
|
|
|
bool operator==(const error_category& rhs) const noexcept;
|
|
bool operator!=(const error_category& rhs) const noexcept;
|
|
bool operator<(const error_category& rhs) const noexcept;
|
|
};
|
|
|
|
const error_category& generic_category() noexcept;
|
|
const error_category& system_category() noexcept;
|
|
|
|
template <class T> struct is_error_code_enum
|
|
: public false_type {};
|
|
|
|
template <class T> struct is_error_condition_enum
|
|
: public false_type {};
|
|
|
|
template <class _Tp>
|
|
inline constexpr size_t is_error_condition_enum_v = is_error_condition_enum<_Tp>::value; // C++17
|
|
|
|
template <class _Tp>
|
|
inline constexpr size_t is_error_code_enum_v = is_error_code_enum<_Tp>::value; // C++17
|
|
|
|
class error_code
|
|
{
|
|
public:
|
|
// constructors:
|
|
error_code() noexcept;
|
|
error_code(int val, const error_category& cat) noexcept;
|
|
template <class ErrorCodeEnum>
|
|
error_code(ErrorCodeEnum e) noexcept;
|
|
|
|
// modifiers:
|
|
void assign(int val, const error_category& cat) noexcept;
|
|
template <class ErrorCodeEnum>
|
|
error_code& operator=(ErrorCodeEnum e) noexcept;
|
|
void clear() noexcept;
|
|
|
|
// observers:
|
|
int value() const noexcept;
|
|
const error_category& category() const noexcept;
|
|
error_condition default_error_condition() const noexcept;
|
|
string message() const;
|
|
explicit operator bool() const noexcept;
|
|
};
|
|
|
|
// non-member functions:
|
|
bool operator<(const error_code& lhs, const error_code& rhs) noexcept;
|
|
template <class charT, class traits>
|
|
basic_ostream<charT,traits>&
|
|
operator<<(basic_ostream<charT,traits>& os, const error_code& ec);
|
|
|
|
class error_condition
|
|
{
|
|
public:
|
|
// constructors:
|
|
error_condition() noexcept;
|
|
error_condition(int val, const error_category& cat) noexcept;
|
|
template <class ErrorConditionEnum>
|
|
error_condition(ErrorConditionEnum e) noexcept;
|
|
|
|
// modifiers:
|
|
void assign(int val, const error_category& cat) noexcept;
|
|
template <class ErrorConditionEnum>
|
|
error_condition& operator=(ErrorConditionEnum e) noexcept;
|
|
void clear() noexcept;
|
|
|
|
// observers:
|
|
int value() const noexcept;
|
|
const error_category& category() const noexcept;
|
|
string message() const noexcept;
|
|
explicit operator bool() const noexcept;
|
|
};
|
|
|
|
bool operator<(const error_condition& lhs, const error_condition& rhs) noexcept;
|
|
|
|
class system_error
|
|
: public runtime_error
|
|
{
|
|
public:
|
|
system_error(error_code ec, const string& what_arg);
|
|
system_error(error_code ec, const char* what_arg);
|
|
system_error(error_code ec);
|
|
system_error(int ev, const error_category& ecat, const string& what_arg);
|
|
system_error(int ev, const error_category& ecat, const char* what_arg);
|
|
system_error(int ev, const error_category& ecat);
|
|
|
|
const error_code& code() const noexcept;
|
|
const char* what() const noexcept;
|
|
};
|
|
|
|
template <> struct is_error_condition_enum<errc>
|
|
: true_type { }
|
|
|
|
error_code make_error_code(errc e) noexcept;
|
|
error_condition make_error_condition(errc e) noexcept;
|
|
|
|
// Comparison operators:
|
|
bool operator==(const error_code& lhs, const error_code& rhs) noexcept;
|
|
bool operator==(const error_code& lhs, const error_condition& rhs) noexcept;
|
|
bool operator==(const error_condition& lhs, const error_code& rhs) noexcept;
|
|
bool operator==(const error_condition& lhs, const error_condition& rhs) noexcept;
|
|
bool operator!=(const error_code& lhs, const error_code& rhs) noexcept;
|
|
bool operator!=(const error_code& lhs, const error_condition& rhs) noexcept;
|
|
bool operator!=(const error_condition& lhs, const error_code& rhs) noexcept;
|
|
bool operator!=(const error_condition& lhs, const error_condition& rhs) noexcept;
|
|
|
|
template <> struct hash<std::error_code>;
|
|
template <> struct hash<std::error_condition>;
|
|
|
|
} // std
|
|
|
|
*/
|
|
|
|
#include <__config>
|
|
#include <__errc>
|
|
#include <__functional_base> // unary_function
|
|
#include <compare>
|
|
#include <stdexcept>
|
|
#include <string>
|
|
#include <type_traits>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
#pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
// is_error_code_enum
|
|
|
|
template <class _Tp>
|
|
struct _LIBCPP_TEMPLATE_VIS is_error_code_enum
|
|
: public false_type {};
|
|
|
|
#if _LIBCPP_STD_VER > 14
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VAR constexpr size_t is_error_code_enum_v = is_error_code_enum<_Tp>::value;
|
|
#endif
|
|
|
|
// is_error_condition_enum
|
|
|
|
template <class _Tp>
|
|
struct _LIBCPP_TEMPLATE_VIS is_error_condition_enum
|
|
: public false_type {};
|
|
|
|
#if _LIBCPP_STD_VER > 14
|
|
template <class _Tp>
|
|
_LIBCPP_INLINE_VAR constexpr size_t is_error_condition_enum_v = is_error_condition_enum<_Tp>::value;
|
|
#endif
|
|
|
|
template <>
|
|
struct _LIBCPP_TEMPLATE_VIS is_error_condition_enum<errc>
|
|
: true_type { };
|
|
|
|
#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
|
|
template <>
|
|
struct _LIBCPP_TEMPLATE_VIS is_error_condition_enum<errc::__lx>
|
|
: true_type { };
|
|
#endif
|
|
|
|
class _LIBCPP_TYPE_VIS error_condition;
|
|
class _LIBCPP_TYPE_VIS error_code;
|
|
|
|
// class error_category
|
|
|
|
class _LIBCPP_HIDDEN __do_message;
|
|
|
|
class _LIBCPP_TYPE_VIS error_category
|
|
{
|
|
public:
|
|
virtual ~error_category() _NOEXCEPT;
|
|
|
|
#if defined(_LIBCPP_BUILDING_LIBRARY) && \
|
|
defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS)
|
|
error_category() _NOEXCEPT;
|
|
#else
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_LIBCPP_CONSTEXPR_AFTER_CXX11 error_category() _NOEXCEPT _LIBCPP_DEFAULT
|
|
#endif
|
|
private:
|
|
error_category(const error_category&);// = delete;
|
|
error_category& operator=(const error_category&);// = delete;
|
|
|
|
public:
|
|
virtual const char* name() const _NOEXCEPT = 0;
|
|
virtual error_condition default_error_condition(int __ev) const _NOEXCEPT;
|
|
virtual bool equivalent(int __code, const error_condition& __condition) const _NOEXCEPT;
|
|
virtual bool equivalent(const error_code& __code, int __condition) const _NOEXCEPT;
|
|
virtual string message(int __ev) const = 0;
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool operator==(const error_category& __rhs) const _NOEXCEPT {return this == &__rhs;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool operator!=(const error_category& __rhs) const _NOEXCEPT {return !(*this == __rhs);}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool operator< (const error_category& __rhs) const _NOEXCEPT {return this < &__rhs;}
|
|
|
|
friend class _LIBCPP_HIDDEN __do_message;
|
|
};
|
|
|
|
class _LIBCPP_HIDDEN __do_message
|
|
: public error_category
|
|
{
|
|
public:
|
|
virtual string message(int ev) const;
|
|
};
|
|
|
|
_LIBCPP_FUNC_VIS const error_category& generic_category() _NOEXCEPT;
|
|
_LIBCPP_FUNC_VIS const error_category& system_category() _NOEXCEPT;
|
|
|
|
class _LIBCPP_TYPE_VIS error_condition
|
|
{
|
|
int __val_;
|
|
const error_category* __cat_;
|
|
public:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
error_condition() _NOEXCEPT : __val_(0), __cat_(&generic_category()) {}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
error_condition(int __val, const error_category& __cat) _NOEXCEPT
|
|
: __val_(__val), __cat_(&__cat) {}
|
|
|
|
template <class _Ep>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
error_condition(_Ep __e,
|
|
typename enable_if<is_error_condition_enum<_Ep>::value>::type* = nullptr
|
|
) _NOEXCEPT
|
|
{*this = make_error_condition(__e);}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void assign(int __val, const error_category& __cat) _NOEXCEPT
|
|
{
|
|
__val_ = __val;
|
|
__cat_ = &__cat;
|
|
}
|
|
|
|
template <class _Ep>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_error_condition_enum<_Ep>::value,
|
|
error_condition&
|
|
>::type
|
|
operator=(_Ep __e) _NOEXCEPT
|
|
{*this = make_error_condition(__e); return *this;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void clear() _NOEXCEPT
|
|
{
|
|
__val_ = 0;
|
|
__cat_ = &generic_category();
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
int value() const _NOEXCEPT {return __val_;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
const error_category& category() const _NOEXCEPT {return *__cat_;}
|
|
string message() const;
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_LIBCPP_EXPLICIT
|
|
operator bool() const _NOEXCEPT {return __val_ != 0;}
|
|
};
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
error_condition
|
|
make_error_condition(errc __e) _NOEXCEPT
|
|
{
|
|
return error_condition(static_cast<int>(__e), generic_category());
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
operator<(const error_condition& __x, const error_condition& __y) _NOEXCEPT
|
|
{
|
|
return __x.category() < __y.category()
|
|
|| (__x.category() == __y.category() && __x.value() < __y.value());
|
|
}
|
|
|
|
// error_code
|
|
|
|
class _LIBCPP_TYPE_VIS error_code
|
|
{
|
|
int __val_;
|
|
const error_category* __cat_;
|
|
public:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
error_code() _NOEXCEPT : __val_(0), __cat_(&system_category()) {}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
error_code(int __val, const error_category& __cat) _NOEXCEPT
|
|
: __val_(__val), __cat_(&__cat) {}
|
|
|
|
template <class _Ep>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
error_code(_Ep __e,
|
|
typename enable_if<is_error_code_enum<_Ep>::value>::type* = nullptr
|
|
) _NOEXCEPT
|
|
{*this = make_error_code(__e);}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void assign(int __val, const error_category& __cat) _NOEXCEPT
|
|
{
|
|
__val_ = __val;
|
|
__cat_ = &__cat;
|
|
}
|
|
|
|
template <class _Ep>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
typename enable_if
|
|
<
|
|
is_error_code_enum<_Ep>::value,
|
|
error_code&
|
|
>::type
|
|
operator=(_Ep __e) _NOEXCEPT
|
|
{*this = make_error_code(__e); return *this;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void clear() _NOEXCEPT
|
|
{
|
|
__val_ = 0;
|
|
__cat_ = &system_category();
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
int value() const _NOEXCEPT {return __val_;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
const error_category& category() const _NOEXCEPT {return *__cat_;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
error_condition default_error_condition() const _NOEXCEPT
|
|
{return __cat_->default_error_condition(__val_);}
|
|
|
|
string message() const;
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_LIBCPP_EXPLICIT
|
|
operator bool() const _NOEXCEPT {return __val_ != 0;}
|
|
};
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
error_code
|
|
make_error_code(errc __e) _NOEXCEPT
|
|
{
|
|
return error_code(static_cast<int>(__e), generic_category());
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
operator<(const error_code& __x, const error_code& __y) _NOEXCEPT
|
|
{
|
|
return __x.category() < __y.category()
|
|
|| (__x.category() == __y.category() && __x.value() < __y.value());
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
operator==(const error_code& __x, const error_code& __y) _NOEXCEPT
|
|
{
|
|
return __x.category() == __y.category() && __x.value() == __y.value();
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
operator==(const error_code& __x, const error_condition& __y) _NOEXCEPT
|
|
{
|
|
return __x.category().equivalent(__x.value(), __y)
|
|
|| __y.category().equivalent(__x, __y.value());
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
operator==(const error_condition& __x, const error_code& __y) _NOEXCEPT
|
|
{
|
|
return __y == __x;
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
operator==(const error_condition& __x, const error_condition& __y) _NOEXCEPT
|
|
{
|
|
return __x.category() == __y.category() && __x.value() == __y.value();
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
operator!=(const error_code& __x, const error_code& __y) _NOEXCEPT
|
|
{return !(__x == __y);}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
operator!=(const error_code& __x, const error_condition& __y) _NOEXCEPT
|
|
{return !(__x == __y);}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
operator!=(const error_condition& __x, const error_code& __y) _NOEXCEPT
|
|
{return !(__x == __y);}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
bool
|
|
operator!=(const error_condition& __x, const error_condition& __y) _NOEXCEPT
|
|
{return !(__x == __y);}
|
|
|
|
template <>
|
|
struct _LIBCPP_TEMPLATE_VIS hash<error_code>
|
|
: public unary_function<error_code, size_t>
|
|
{
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
size_t operator()(const error_code& __ec) const _NOEXCEPT
|
|
{
|
|
return static_cast<size_t>(__ec.value());
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct _LIBCPP_TEMPLATE_VIS hash<error_condition>
|
|
: public unary_function<error_condition, size_t>
|
|
{
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
size_t operator()(const error_condition& __ec) const _NOEXCEPT
|
|
{
|
|
return static_cast<size_t>(__ec.value());
|
|
}
|
|
};
|
|
|
|
// system_error
|
|
|
|
class _LIBCPP_TYPE_VIS system_error
|
|
: public runtime_error
|
|
{
|
|
error_code __ec_;
|
|
public:
|
|
system_error(error_code __ec, const string& __what_arg);
|
|
system_error(error_code __ec, const char* __what_arg);
|
|
system_error(error_code __ec);
|
|
system_error(int __ev, const error_category& __ecat, const string& __what_arg);
|
|
system_error(int __ev, const error_category& __ecat, const char* __what_arg);
|
|
system_error(int __ev, const error_category& __ecat);
|
|
system_error(const system_error&) _NOEXCEPT = default;
|
|
~system_error() _NOEXCEPT;
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
const error_code& code() const _NOEXCEPT {return __ec_;}
|
|
|
|
private:
|
|
static string __init(const error_code&, string);
|
|
};
|
|
|
|
_LIBCPP_NORETURN _LIBCPP_FUNC_VIS
|
|
void __throw_system_error(int ev, const char* what_arg);
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_SYSTEM_ERROR
|