Sacado_Tay_TaylorTraits.hpp

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// $Id: Sacado_Tay_TaylorTraits.hpp,v 1.1 2007/06/29 22:18:33 etphipp Exp $ 
// $Source: /space/CVS/Trilinos/packages/sacado/src/Sacado_Tay_TaylorTraits.hpp,v $ 
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// ***********************************************************************
// 
//                           Sacado Package
//                 Copyright (2006) Sandia Corporation
// 
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
// 
// 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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//  
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// Questions? Contact David M. Gay (dmgay@sandia.gov) or Eric T. Phipps
// (etphipp@sandia.gov).
// 
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#ifndef SACADO_TAY_TAYLORTRAITS_HPP
#define SACADO_TAY_TAYLORTRAITS_HPP

#include "Sacado_Traits.hpp"

// Forward declarations
namespace Sacado {
  namespace Tay {
    template <typename T> class Taylor;
  }
}

namespace Sacado {

  template <typename T>
  class Promote< Tay::Taylor<T>, Tay::Taylor<T> > {
  public:

    typedef Tay::Taylor<T> type;
  };

  template <typename L, typename R>
  class Promote< Tay::Taylor<L>, R > {
  public:

    typedef typename ValueType< Tay::Taylor<L> >::type value_type_l;
    typedef typename ValueType<R>::type value_type_r;
    typedef typename Promote<value_type_l,value_type_r>::type value_type;

    typedef Tay::Taylor<value_type> type;
  };

  template <typename L, typename R>
  class Promote< L, Tay::Taylor<R> > {
  public:

    typedef typename ValueType<L>::type value_type_l;
    typedef typename ValueType< Tay::Taylor<R> >::type value_type_r;
    typedef typename Promote<value_type_l,value_type_r>::type value_type;

    typedef Tay::Taylor<value_type> type;
  };

  template <typename T>
  struct ScalarType< Tay::Taylor<T> > {
    typedef T type;
  };

  template <typename T>
  struct ValueType< Tay::Taylor<T> > {
    typedef T type;
  };

  template <typename T>
  struct ScalarValueType< Tay::Taylor<T> > {
    typedef typename ScalarValueType< T >::type type;
  };

  template <typename T>
  struct IsADType< Tay::Taylor<T> > {
    static const bool value = true;
  };

  template <typename T>
  struct IsScalarType< Tay::Taylor<T> > {
    static const bool value = false;
  };

  template <typename T>
  struct Value< Tay::Taylor<T> > {
    typedef typename ValueType< Tay::Taylor<T> >::type value_type;
    static const value_type& eval(const Tay::Taylor<T>& x) { 
      return x.val(); }
  };

} // namespace Sacado

#endif // SACADO_TAYLOR_SIMPLETAYLORTRAITS_HPP

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