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/* vim: set sw=4 sts=4 et foldmethod=syntax : */
/*
* Copyright (c) 2007 David Leverton <u01drl3@abdn.ac.uk>
*
* This file is part of the Paludis package manager. Paludis is free software;
* you can redistribute it and/or modify it under the terms of the GNU General
* Public License version 2, as published by the Free Software Foundation.
*
* Paludis 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 program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef PALUDIS_GUARD_PALUDIS_UTIL_CLONE_HH
#define PALUDIS_GUARD_PALUDIS_UTIL_CLONE_HH 1
#include <paludis/util/attributes.hh>
#include <paludis/util/tr1_memory.hh>
/** \file
* Declares the Cloneable class and helpers.
*
* \ingroup grpclone
*/
namespace paludis
{
/**
* Base class for objects that can be cloned.
*
* \ingroup grpclone
* \nosubgrouping
*/
template <typename T_>
class PALUDIS_VISIBLE Cloneable
{
public:
///\name Cloning
///\{
/**
* Return a new copy of ourselves.
*/
virtual tr1::shared_ptr<T_> clone() const PALUDIS_ATTRIBUTE((warn_unused_result)) = 0;
///\}
///\name Basic operations
///\{
virtual ~Cloneable();
///\}
};
/**
* Helper class implementing the clone() method using the copy
* contructor.
*
* \ingroup grpclone
* \nosubgrouping
*/
template <typename Base_, typename Child_>
class PALUDIS_VISIBLE CloneUsingThis :
public virtual Cloneable<Base_>
{
public:
virtual tr1::shared_ptr<Base_> clone() const PALUDIS_ATTRIBUTE((warn_unused_result));
///\name Basic operations
///\{
virtual ~CloneUsingThis();
///\}
};
}
#endif
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