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TypeContainerVisitor.h
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TypeContainerVisitor.h
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/*
* This file is part of the CMaNGOS Project. See AUTHORS file for Copyright information
*
* This program 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 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 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 MANGOS_TYPECONTAINERVISITOR_H
#define MANGOS_TYPECONTAINERVISITOR_H
/*
* @class TypeContainerVisitor is implemented as a visitor pattern. It is
* a visitor to the TypeMapContainer or ContainerMapList. The visitor has
* to overload its types as a visit method is called.
*/
#include "Platform/Define.h"
#include "TypeContainer.h"
// forward declaration
template<class T, class Y> class TypeContainerVisitor;
// visitor helper
template<class VISITOR, class TYPE_CONTAINER>
void VisitorHelper(VISITOR& v, TYPE_CONTAINER& c)
{
v.Visit(c);
}
// terminate condition container map list
template<class VISITOR>
void VisitorHelper(VISITOR& /*v*/, ContainerMapList<TypeNull>& /*c*/)
{
}
template<class VISITOR, class T>
void VisitorHelper(VISITOR& v, ContainerMapList<T>& c)
{
v.Visit(c._element);
}
// recursion container map list
template<class VISITOR, class H, class T>
void VisitorHelper(VISITOR& v, ContainerMapList<TypeList<H, T> >& c)
{
VisitorHelper(v, c._elements);
VisitorHelper(v, c._TailElements);
}
// for TypeMapContainer
template<class VISITOR, class OBJECT_TYPES>
void VisitorHelper(VISITOR& v, TypeMapContainer<OBJECT_TYPES>& c)
{
VisitorHelper(v, c.GetElements());
}
template<class VISITOR, class TYPE_CONTAINER>
class TypeContainerVisitor
{
public:
TypeContainerVisitor(VISITOR& v)
: i_visitor(v)
{
}
void Visit(TYPE_CONTAINER& c)
{
VisitorHelper(i_visitor, c);
}
void Visit(const TYPE_CONTAINER& c) const
{
VisitorHelper(i_visitor, c);
}
private:
VISITOR& i_visitor;
};
#endif