Sacado_ELRFad_GeneralFadExpr.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.
// 
// 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
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#ifndef SACADO_ELRFAD_GENERALFADEXPR_HPP
#define SACADO_ELRFAD_GENERALFADEXPR_HPP

#include "Sacado_ELRFad_GeneralFad.hpp"

namespace Sacado {

  namespace ELRFad {


    template <typename T, typename Storage> 
    class Expr< GeneralFad<T,Storage> > : public GeneralFad<T,Storage> {

    public:

      typedef T value_type;

      typedef GeneralFad<T,Storage> base_expr_type;

      static const int num_args = 1;

      static const bool is_linear = true;

      Expr() : 
  GeneralFad<T,Storage>() {}


      Expr(const T & x) : 
  GeneralFad<T,Storage>(x) {}


      Expr(const int sz, const T & x) : 
  GeneralFad<T,Storage>(sz,x) {}


      Expr(const int sz, const int i, const T & x) : 
  GeneralFad<T,Storage>(sz,i,x) {}

      Expr(const Expr& x) : 
  GeneralFad<T,Storage>(x) {}

      template <typename S> Expr(const Expr<S>& x) :
  GeneralFad<T,Storage>(x) {}

      ~Expr() {}

      void computePartials(const T& bar, T partials[]) const { 
  partials[0] = bar; 
      }

      void getTangents(int i, T dots[]) const { 
  if (i<this->size())
    dots[0] = this->fastAccessDx(i);
  else
    dots[0] = 0.0;
      }

      template <int Arg>
      bool isActive() const { return this->size() > 0; }

      bool isActive2(int j) const { return this->size() > 0; }

      bool isLinear() const { return true; }

      template <int Arg>
      const T& getTangent(int i) const { return this->fastAccessDx(i); }

      const T* getDx(int j) const { return this->dx(); }

      const base_expr_type& getArg(int j) const { return *this; }

      int numActiveArgs() const {
  return this->size() > 0 ? 1 : 0;
      }

      void computeActivePartials(const T& bar, T *partials) const { 
  if (this->size() > 0)
    partials[0] = bar; 
      }

    }; // class Expr<GeneralFad>
    
    template <typename T, typename S>
    struct ExprPromote< GeneralFad<T,S>, T > {
      typedef GeneralFad<T,S> type;
    };
    
    template <typename T, typename S>
    struct ExprPromote< T, GeneralFad<T,S> > {
      typedef GeneralFad<T,S> type;
    };

  } // namespace ELRFad

} // namespace Sacado

#include "Sacado_ELRFad_Ops.hpp"

#endif // SACADO_ELRFAD_GENERALFADEXPR_HPP