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Sacado_ELRCacheFad_GeneralFadExpr.hpp
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00001 // $Id$ 
00002 // $Source$ 
00003 // @HEADER
00004 // ***********************************************************************
00005 // 
00006 //                           Sacado Package
00007 //                 Copyright (2006) Sandia Corporation
00008 // 
00009 // Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
00010 // the U.S. Government retains certain rights in this software.
00011 // 
00012 // This library is free software; you can redistribute it and/or modify
00013 // it under the terms of the GNU Lesser General Public License as
00014 // published by the Free Software Foundation; either version 2.1 of the
00015 // License, or (at your option) any later version.
00016 //  
00017 // This library is distributed in the hope that it will be useful, but
00018 // WITHOUT ANY WARRANTY; without even the implied warranty of
00019 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00020 // Lesser General Public License for more details.
00021 //  
00022 // You should have received a copy of the GNU Lesser General Public
00023 // License along with this library; if not, write to the Free Software
00024 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00025 // USA
00026 // Questions? Contact David M. Gay (dmgay@sandia.gov) or Eric T. Phipps
00027 // (etphipp@sandia.gov).
00028 // 
00029 // ***********************************************************************
00030 // @HEADER
00031 
00032 #ifndef SACADO_ELRCACHEFAD_GENERALFADEXPR_HPP
00033 #define SACADO_ELRCACHEFAD_GENERALFADEXPR_HPP
00034 
00035 #include "Sacado_ELRCacheFad_GeneralFad.hpp"
00036 
00037 namespace Sacado {
00038 
00039   namespace ELRCacheFad {
00040 
00042 
00048     template <typename T, typename Storage> 
00049     class Expr< GeneralFad<T,Storage> > : public GeneralFad<T,Storage> {
00050 
00051     public:
00052 
00053       typedef typename GeneralFad<T,Storage>::value_type value_type;
00054       typedef typename GeneralFad<T,Storage>::scalar_type scalar_type;
00055 
00057       typedef GeneralFad<T,Storage> base_expr_type;
00058 
00060       static const int num_args = 1;
00061 
00063       Expr() : 
00064   GeneralFad<T,Storage>() {}
00065 
00067 
00070       Expr(const T & x) : 
00071   GeneralFad<T,Storage>(x) {}
00072 
00074 
00077       Expr(const int sz, const T & x) : 
00078   GeneralFad<T,Storage>(sz,x) {}
00079 
00081 
00086       Expr(const int sz, const int i, const T & x) : 
00087   GeneralFad<T,Storage>(sz,i,x) {}
00088 
00090       Expr(const Expr& x) : 
00091   GeneralFad<T,Storage>(x) {}
00092 
00094       template <typename S> Expr(const Expr<S>& x) :
00095   GeneralFad<T,Storage>(x) {}
00096 
00098       ~Expr() {}
00099 
00101       void computePartials(const T& bar, T partials[]) const { 
00102   partials[0] = bar; 
00103       }
00104 
00106       void getTangents(int i, T dots[]) const { 
00107   if (i<this->size())
00108     dots[0] = this->fastAccessDx(i);
00109   else
00110     dots[0] = 0.0;
00111       }
00112 
00114       template <int Arg>
00115       bool isActive() const { return this->size() > 0; }
00116 
00118       template <int Arg>
00119       T getTangent(int i) const { return this->fastAccessDx(i); }
00120 
00121     }; // class Expr<GeneralFad>
00122     
00124     template <typename T, typename S>
00125     struct ExprPromote< GeneralFad<T,S>, T > {
00126       typedef GeneralFad<T,S> type;
00127     };
00128     
00130     template <typename T, typename S>
00131     struct ExprPromote< T, GeneralFad<T,S> > {
00132       typedef GeneralFad<T,S> type;
00133     };
00134 
00135   } // namespace ELRCacheFad
00136 
00137 } // namespace Sacado
00138 
00139 #include "Sacado_ELRCacheFad_Ops.hpp"
00140 
00141 #endif // SACADO_ELRCACHEFAD_GENERALFADEXPR_HPP
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