93 lines
2.2 KiB
C++
93 lines
2.2 KiB
C++
/* vim: set sw=4 sts=4 et foldmethod=syntax : */
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/*
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* Copyright (c) 2007 David Leverton
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* Copyright (c) 2007, 2008, 2009 Ciaran McCreesh
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*
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* This file is part of the Paludis package manager. Paludis is free software;
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* you can redistribute it and/or modify it under the terms of the GNU General
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* Public License version 2, as published by the Free Software Foundation.
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*
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* Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef PALUDIS_GUARD_PALUDIS_UTIL_CLONE_HH
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#define PALUDIS_GUARD_PALUDIS_UTIL_CLONE_HH 1
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#include <paludis/util/attributes.hh>
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#include <memory>
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/** \file
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* Declares the Cloneable class and helpers.
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*
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* \ingroup g_oo
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*
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* \section Examples
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*
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* - None at this time.
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*/
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namespace paludis
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{
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/**
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* Base class for objects that can be cloned.
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*
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* \ingroup g_oo
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* \nosubgrouping
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*/
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template <typename T_>
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class PALUDIS_VISIBLE Cloneable
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{
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public:
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///\name Cloning
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///\{
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/**
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* Return a new copy of ourselves.
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*/
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virtual std::shared_ptr<T_> clone() const PALUDIS_ATTRIBUTE((warn_unused_result)) = 0;
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///\}
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///\name Basic operations
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///\{
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virtual ~Cloneable();
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///\}
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};
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/**
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* Helper class implementing the clone() method using the copy
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* contructor.
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*
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* \ingroup g_oo
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* \nosubgrouping
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*/
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template <typename Base_, typename Child_>
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class PALUDIS_VISIBLE CloneUsingThis :
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public virtual Cloneable<Base_>
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{
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public:
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virtual std::shared_ptr<Base_> clone() const PALUDIS_ATTRIBUTE((warn_unused_result));
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///\name Basic operations
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///\{
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virtual ~CloneUsingThis();
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///\}
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};
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}
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#endif
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