gcc/libstdc++-v3/include/std/system_error
Paolo Carlini 4661c8fd43 system_error (native_category): Remove.
2008-10-10  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/std/system_error (native_category): Remove.
	(posix_category): Add.
	(error_code::error_code(_ErrorCodeEnum, typename enable_if<>:type*):
	Fix _M_cat initialization.
	(error_code::operator=(_ErrorCodeEnum)): Assign _M_cat too.
	(error_condition::_M_cat, error_condtion::operator=
	(_ErrorConditionEnum)): Implement resolution of DR 804.
	(error_condition::error_condition(_ErrorConditionEnum, typename
	enable_if<>:type*): Fix.
	(error_condition::clear, error_condition::assign): Implement.
	(operator==, operator!=): Fix uglification of parameters.
	(make_error_code, make_error_condition): Define in namespace
	posix_error.
	(operator<<(basic_ostream<>&, const error_code&)): Define here.
	* include/std/ostream (operator<<(basic_ostream<>&,
	const error_code&)): Do not define here.
	* testsuite/19_diagnostics/error_condition/cons/1.cc: New.	
	* testsuite/19_diagnostics/error_condition/operators/bool.cc: Likewise.
	* testsuite/19_diagnostics/error_condition/operators/bool_neg.cc:
	Likewise.
	* testsuite/19_diagnostics/error_condition/operators/equal.cc:
	Likewise.
	* testsuite/19_diagnostics/error_condition/operators/not_equal.cc:
	Likewise.
	* testsuite/19_diagnostics/error_code/cons/1.cc: Tweak.
	* testsuite/19_diagnostics/error_category/cons/copy_neg.cc: Adjust
	dg-error line numbers.
	* testsuite/30_threads/unique_lock/locking/2.cc: Tweak.

	* testsuite/util/testsuite_error.h: Minor tweaks.
	* testsuite/util/testsuite_hooks.cc: Avoid uninitialized warning.

From-SVN: r141039
2008-10-10 12:39:01 +00:00

364 lines
9.4 KiB
C++

// <system_error> -*- C++ -*-
// Copyright (C) 2007, 2008 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 2, 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.
// You should have received a copy of the GNU General Public License
// along with this library; see the file COPYING. If not, write to
// the Free Software Foundation, 51 Franklin Street, Fifth Floor,
// Boston, MA 02110-1301, USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
/** @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 <c++0x_warning.h>
#else
#include <bits/c++config.h>
#include <bits/error_constants.h>
#include <iosfwd>
#include <stdexcept>
_GLIBCXX_BEGIN_NAMESPACE(std)
class error_code;
class error_condition;
class error_category;
class system_error;
/// is_error_code_enum
template<typename _Tp>
struct is_error_code_enum : public false_type { };
template<>
struct is_error_code_enum<posix_error::posix_errno>
: public true_type { };
/// is_error_condition_enum
template<typename _Tp>
struct is_error_condition_enum : public false_type { };
template<>
struct is_error_condition_enum<posix_error::posix_errno>
: public true_type { };
/// error_category
struct error_category
{
error_category() { }
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<const error_category*>()(this, &__other); }
bool
operator==(const error_category& __other) const
{ return this == &__other; }
bool
operator!=(const error_category& __other) const
{ return this != &__other; }
private:
error_category(const error_category&);
error_category&
operator=(const error_category&);
};
const error_category& get_posix_category();
const error_category& get_system_category();
static const error_category& posix_category = get_posix_category();
static const error_category& system_category = get_system_category();
/// 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<typename _ErrorCodeEnum>
error_code(_ErrorCodeEnum __e,
typename enable_if<is_error_code_enum<_ErrorCodeEnum>::value>::type* = 0)
: _M_value(__e), _M_cat(&posix_category)
{ }
void
assign(int __v, const error_category& __cat)
{
_M_value = __v;
_M_cat = &__cat;
}
void
clear()
{
_M_value = 0;
_M_cat = &system_category;
}
// DR 804.
template<typename _ErrorCodeEnum>
typename enable_if<is_error_code_enum<_ErrorCodeEnum>::value,
error_code&>::type
operator=(_ErrorCodeEnum __e)
{
_M_value = __e;
_M_cat = &posix_category;
return *this;
}
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;
};
// 19.4.2.5 non-member functions
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<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
{ return (__os << __e.category().name() << ':' << __e.value()); }
/// error_condition
// Portable error identification
struct error_condition
{
error_condition() : _M_value(0), _M_cat(&posix_category) { }
error_condition(int __v, const error_category& __cat)
: _M_value(__v), _M_cat(&__cat) { }
template<typename _ErrorConditionEnum>
error_condition(_ErrorConditionEnum __e,
typename enable_if<is_error_condition_enum
<_ErrorConditionEnum>::value>::type* = 0)
: _M_value(__e), _M_cat(&posix_category) { }
void
assign(int __v, const error_category& __cat)
{
_M_value = __v;
_M_cat = &__cat;
}
// DR 804.
template<typename _ErrorConditionEnum>
typename enable_if<is_error_condition_enum
<_ErrorConditionEnum>::value, error_condition&>::type
operator=(_ErrorConditionEnum __e)
{
_M_value = __e;
_M_cat = &posix_category;
return *this;
}
void
clear()
{
_M_value = 0;
_M_cat = &posix_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;
};
// 19.4.3.5 non-member functions
inline bool
operator<(const error_condition& __lhs, const error_condition& __rhs)
{
return (__lhs.category() < __rhs.category()
|| (__lhs.category() == __rhs.category()
&& __lhs.value() < __rhs.value()));
}
namespace posix_error
{
inline error_code
make_error_code(posix_errno __e)
{ return error_code(__e, posix_category); }
inline error_condition
make_error_condition(posix_errno __e)
{ return error_condition(__e, posix_category); }
}
// 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); }
/// Thrown to indicate error code of underlying system.
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) { }
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