/*
 * This source file is part of KEOS (Free 3D Engine)
 * For the latest info, see http://www.keosengine.org/
 * E-mails : thierry.vouriot@keosengine.org, yeri@keosengine.org
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser 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, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 */

#ifndef KEOS_GENHIERARCHIES_H
#define KEOS_GENHIERARCHIES_H

#include "KeosTypelist.h"

namespace Keos
{
    //-----------------------------------------------------------------------
    /** Scattered hierarchy.
     *
     */
    template <class TList, template <class> class Handler> class CScatteredHierarchy;

    template
    <
        class T1,
        class T2,
        template <class> class Handler
    >
    class CScatteredHierarchy<TypeList<T1, T2>, Handler> : public Handler<T1>, public CScatteredHierarchy<T2, Handler>
    {
    };

    template
    <
        class T,
        template <class> class Handler
    >
    class CScatteredHierarchy<TypeList<T, NullType>, Handler> : public Handler<T>
    {
    };

    template
    <
        template <class> class Handler
    >
    class CScatteredHierarchy<NullType, Handler>
    {
    };


    //-----------------------------------------------------------------------
    /** Linear hierarchy.
     *
     */
    template <class TList, template <class, class> class Handler, class Root = NullType> class CLinearHierarchy;

    template
    <
        class T1,
        class T2,
        template <class, class> class Handler,
        class Root
    >
    class CLinearHierarchy<TypeList<T1, T2>, Handler, Root> : public Handler<T1, CLinearHierarchy<T2, Handler, Root> >
    {
    };

    template
    <
        class T,
        template <class, class> class Handler,
        class Root
    >
    class CLinearHierarchy<TypeList<T, NullType>, Handler, Root> : public Handler<T, Root>
    {
    };

} // namespace Keos


#endif // KEOS_GENHIERARCHIES_H
