TypeContainerVisitor.h

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/*
 * This file is part of the TrinityCore 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, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef TRINITY_TYPECONTAINERVISITOR_H
#define TRINITY_TYPECONTAINERVISITOR_H
 
/*
 * @class TypeContainerVisitor is implemented as a visitor pattern. It is
 * a visitor to the TypeContainerList or TypeContainerMapList. The visitor has
 * to overload its types as a visit method is called.
 */
 
#include "Dynamic/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());
}
 
// TypeUnorderedMapContainer
template<class VISITOR, class KEY_TYPE>
void VisitorHelper(VISITOR& /*v*/, ContainerUnorderedMap<TypeNull, KEY_TYPE>& /*c*/) { }
 
template<class VISITOR, class KEY_TYPE, class T>
void VisitorHelper(VISITOR& v, ContainerUnorderedMap<T, KEY_TYPE>& c)
{
 v.Visit(c._element);
}
 
template<class VISITOR, class KEY_TYPE, class H, class T>
void VisitorHelper(VISITOR& v, ContainerUnorderedMap<TypeList<H, T>, KEY_TYPE>& c)
{
 VisitorHelper(v, c._elements);
 VisitorHelper(v, c._TailElements);
}
 
template<class VISITOR, class OBJECT_TYPES, class KEY_TYPE>
void VisitorHelper(VISITOR& v, TypeUnorderedMapContainer<OBJECT_TYPES, KEY_TYPE>& 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(TYPE_CONTAINER const& c) const
 {
 VisitorHelper(i_visitor, c);
 }
 
 private:
 VISITOR &i_visitor;
};
#endif