gfftcaller.h

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/***************************************************************************
 *   Copyright (C) 2014 by Vladimir Mirnyy                                 *
 *                                                                         *
 *   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.                          *
 ***************************************************************************/

#ifndef __caller_h
#define __caller_h

#include "Typelist.h"

namespace GFFT {


template<class TList>
struct Caller;

template<class Head, class Tail>
struct Caller<Loki::Typelist<Head,Tail> > 
{
   template<typename T>
   void apply(T* data) {
      obj_.apply(data);
      next_.apply(data);
   }
   
   template<typename T>
   void apply(const T* src, T* dst) {
      obj_.apply(src, dst);
      next_.apply(src, dst);
   }

private:
   Head obj_;
   Caller<Tail> next_;
};



template<>
struct Caller<Loki::NullType> 
{
   template<typename T>
   void apply(T*) { }

   template<typename T>
   void apply(const T*, T*) { }
};


template<class TList>
struct StaticCaller;

template<class Head, class Tail>
struct StaticCaller<Loki::Typelist<Head,Tail> > 
{
   template<typename T>
   static void apply(T* data) {
      Head::apply(data);
      StaticCaller<Tail>::apply(data);
   }

   template<typename T>
   static void apply(const T* src, T* dst) {
      Head::apply(src, dst);
      StaticCaller<Tail>::apply(src, dst);
   }
};

template<>
struct StaticCaller<Loki::NullType> 
{
   template<typename T>
   static void apply(T*) { }

   template<typename T>
   static void apply(const T*, T*) { }
};

} // namespace GFFT

#endif /*__caller_h*/