conditional.hpp

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/*
  CLAW - a C++ Library Absolutely Wonderful
 
  CLAW is a free library without any particular aim but being useful to
  anyone.
 
  Copyright (C) 2005-2011 Julien Jorge
 
  This library 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 2.1 of the License, or (at your option) any later version.
 
  This library 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 library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
  contact: julien.jorge@stuff-o-matic.com
*/
#ifndef __CLAW_CONDITIONAL_HPP__
#define __CLAW_CONDITIONAL_HPP__
 
namespace claw
{
  namespace meta
  {
    template <bool Cond, typename ThenPart, typename ElsePart>
    struct if_then_else;

    template <typename ThenPart, typename ElsePart>
    struct if_then_else<true, ThenPart, ElsePart>
    {
      typedef ThenPart result;
 
    }; // struct if_then_else [true]

    template <typename ThenPart, typename ElsePart>
    struct if_then_else<false, ThenPart, ElsePart>
    {
      typedef ElsePart result;
 
    }; // struct if_then_else [false]
 
  }
}
 
#endif // __CLAW_CONDITIONAL_HPP__