Sacado_mpl_disable_if.hpp

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// $Id$ 
// $Source$ 
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// 
//                           Sacado Package
//                 Copyright (2006) Sandia Corporation
// 
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
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// 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
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#ifndef SACADO_MPL_DISABLE_IF_HPP
#define SACADO_MPL_DISABLE_IF_HPP

namespace Sacado {

  namespace mpl {

    template <bool, typename T = void> 
    struct disable_if_c {};
    
    template <typename T> 
    struct disable_if_c<false, T> { 
      typedef T type; 
    };
    
    template <class Cond, typename T = void> 
    struct disable_if 
      : disable_if_c<Cond::value, T> {};

  }

}

#endif // SACADO_MPL_DISABLE_IF_HPP