khanat-opennel-code/code/nel/include/nel/misc/mutable_container.h
2013-06-17 16:03:24 +02:00

56 lines
1.8 KiB
C++

// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef NL_MUTABLE_CONTAINER_H
#define NL_MUTABLE_CONTAINER_H
namespace NLMISC
{
/** Container wrapper that allow read/write access to element stored in
* a const container.
* In fact, the template only allow calling begin() and end() over
* a const container.
* This prevent the user to change the structure of the container.
* Usage :
*
* class foo
* {
* typedef TMutableContainer<vector<string> > TMyCont;
* TMyCont _MyCont;
*
* public:
* // return the container with mutable item content but const item list
* const TMyCont getContainer() const { return _MyCont; };
* }
*
*/
template <class BaseContainer>
struct TMutableContainer : public BaseContainer
{
typename BaseContainer::iterator begin() const
{
return const_cast<BaseContainer*>(static_cast<const BaseContainer*>(this))->begin();
}
typename BaseContainer::iterator end() const
{
return const_cast<BaseContainer*>(static_cast<const BaseContainer*>(this))->end();
}
};
} // namespace NLMISC
#endif // NL_MUTABLE_CONTAINER_H