Edit: /usr/include/c++/4.4.4/system_error (9434B)
//
-*- C++ -*-
// Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// .
/** @file system_error
* This is a Standard C++ Library header.
*/
#ifndef _GLIBCXX_SYSTEM_ERROR
#define _GLIBCXX_SYSTEM_ERROR 1
#pragma GCC system_header
#ifndef __GXX_EXPERIMENTAL_CXX0X__
# include
#else
#include
#include
#include
#include
_GLIBCXX_BEGIN_NAMESPACE(std)
class error_code;
class error_condition;
class error_category;
class system_error;
/// is_error_code_enum
template
struct is_error_code_enum : public false_type { };
/// is_error_condition_enum
template
struct is_error_condition_enum : public false_type { };
template<>
struct is_error_condition_enum
: public true_type { };
/// error_category
class error_category
{
protected:
error_category() = default;
public:
virtual ~error_category() { }
error_category(const error_category&) = delete;
error_category& operator=(const error_category&) = delete;
virtual const char*
name() const = 0;
virtual string
message(int) const = 0;
virtual error_condition
default_error_condition(int __i) const;
virtual bool
equivalent(int __i, const error_condition& __cond) const;
virtual bool
equivalent(const error_code& __code, int __i) const;
bool
operator<(const error_category& __other) const
{ return less()(this, &__other); }
bool
operator==(const error_category& __other) const
{ return this == &__other; }
bool
operator!=(const error_category& __other) const
{ return this != &__other; }
};
// DR 890.
const error_category& system_category();
const error_category& generic_category();
error_code make_error_code(errc);
/// error_code
// Implementation-specific error identification
struct error_code
{
error_code()
: _M_value(0), _M_cat(&system_category()) { }
error_code(int __v, const error_category& __cat)
: _M_value(__v), _M_cat(&__cat) { }
template
error_code(_ErrorCodeEnum __e,
typename enable_if::value>::type* = 0)
{ *this = make_error_code(__e); }
void
assign(int __v, const error_category& __cat)
{
_M_value = __v;
_M_cat = &__cat;
}
void
clear()
{ assign(0, system_category()); }
// DR 804.
template
typename enable_if::value,
error_code&>::type
operator=(_ErrorCodeEnum __e)
{ return *this = make_error_code(__e); }
int
value() const { return _M_value; }
const error_category&
category() const { return *_M_cat; }
error_condition
default_error_condition() const;
string
message() const
{ return category().message(value()); }
// Safe bool idiom.
// explicit operator bool() const throw()
// { return _M_value != 0; }
typedef void (*__bool_type)();
static void __not_bool_type() { }
operator __bool_type() const
{ return _M_value != 0 ? &__not_bool_type : false; }
// DR 804.
private:
int _M_value;
const error_category* _M_cat;
};
// 19.4.2.6 non-member functions
inline error_code
make_error_code(errc __e)
{ return error_code(static_cast(__e), generic_category()); }
inline bool
operator<(const error_code& __lhs, const error_code& __rhs)
{
return (__lhs.category() < __rhs.category()
|| (__lhs.category() == __rhs.category()
&& __lhs.value() < __rhs.value()));
}
template
basic_ostream<_CharT, _Traits>&
operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
{ return (__os << __e.category().name() << ':' << __e.value()); }
error_condition make_error_condition(errc);
/// error_condition
// Portable error identification
struct error_condition
{
error_condition()
: _M_value(0), _M_cat(&generic_category()) { }
error_condition(int __v, const error_category& __cat)
: _M_value(__v), _M_cat(&__cat) { }
template
error_condition(_ErrorConditionEnum __e,
typename enable_if::value>::type* = 0)
{ *this = make_error_condition(__e); }
void
assign(int __v, const error_category& __cat)
{
_M_value = __v;
_M_cat = &__cat;
}
// DR 804.
template
typename enable_if::value, error_condition&>::type
operator=(_ErrorConditionEnum __e)
{ return *this = make_error_condition(__e); }
void
clear()
{ assign(0, generic_category()); }
// 19.4.3.4 observers
int
value() const { return _M_value; }
const error_category&
category() const { return *_M_cat; }
string
message() const
{ return category().message(value()); }
// Safe bool idiom.
// explicit operator bool() const throw()
// { return _M_value != 0; }
typedef void (*__bool_type)();
static void __not_bool_type() { }
operator __bool_type() const
{ return _M_value != 0 ? &__not_bool_type : false; }
// DR 804.
private:
int _M_value;
const error_category* _M_cat;
};
// 19.4.3.6 non-member functions
inline error_condition
make_error_condition(errc __e)
{ return error_condition(static_cast(__e), generic_category()); }
inline bool
operator<(const error_condition& __lhs, const error_condition& __rhs)
{
return (__lhs.category() < __rhs.category()
|| (__lhs.category() == __rhs.category()
&& __lhs.value() < __rhs.value()));
}
// 19.4.4 Comparison operators
inline bool
operator==(const error_code& __lhs, const error_code& __rhs)
{ return (__lhs.category() == __rhs.category()
&& __lhs.value() == __rhs.value()); }
inline bool
operator==(const error_code& __lhs, const error_condition& __rhs)
{
return (__lhs.category().equivalent(__lhs.value(), __rhs)
|| __rhs.category().equivalent(__lhs, __rhs.value()));
}
inline bool
operator==(const error_condition& __lhs, const error_code& __rhs)
{
return (__rhs.category().equivalent(__rhs.value(), __lhs)
|| __lhs.category().equivalent(__rhs, __lhs.value()));
}
inline bool
operator==(const error_condition& __lhs, const error_condition& __rhs)
{
return (__lhs.category() == __rhs.category()
&& __lhs.value() == __rhs.value());
}
inline bool
operator!=(const error_code& __lhs, const error_code& __rhs)
{ return !(__lhs == __rhs); }
inline bool
operator!=(const error_code& __lhs, const error_condition& __rhs)
{ return !(__lhs == __rhs); }
inline bool
operator!=(const error_condition& __lhs, const error_code& __rhs)
{ return !(__lhs == __rhs); }
inline bool
operator!=(const error_condition& __lhs, const error_condition& __rhs)
{ return !(__lhs == __rhs); }
/**
* @brief Thrown to indicate error code of underlying system.
*
* @ingroup exceptions
*/
class system_error : public std::runtime_error
{
private:
error_code _M_code;
public:
system_error(error_code __ec = error_code())
: runtime_error(""), _M_code(__ec) { }
system_error(error_code __ec, const string& __what)
: runtime_error(__what), _M_code(__ec) { }
/*
* TODO: Add const char* ctors to all exceptions.
*
* system_error(error_code __ec, const char* __what)
* : runtime_error(__what), _M_code(__ec) { }
*
* system_error(int __v, const error_category& __ecat, const char* __what)
* : runtime_error(__what), _M_code(error_code(__v, __ecat)) { }
*/
system_error(int __v, const error_category& __ecat)
: runtime_error(""), _M_code(error_code(__v, __ecat)) { }
system_error(int __v, const error_category& __ecat, const string& __what)
: runtime_error(__what), _M_code(error_code(__v, __ecat)) { }
virtual ~system_error() throw();
const error_code&
code() const throw() { return _M_code; }
};
_GLIBCXX_END_NAMESPACE
#endif // __GXX_EXPERIMENTAL_CXX0X__
#endif // _GLIBCXX_SYSTEM_ERROR