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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       static const bool is_linear = true;
00064 
00066       Expr() : 
00067   GeneralFad<T,Storage>() {}
00068 
00070 
00073       Expr(const T & x) : 
00074   GeneralFad<T,Storage>(x) {}
00075 
00077 
00080       Expr(const int sz, const T & x) : 
00081   GeneralFad<T,Storage>(sz,x) {}
00082 
00084 
00089       Expr(const int sz, const int i, const T & x) : 
00090   GeneralFad<T,Storage>(sz,i,x) {}
00091 
00093       Expr(const Expr& x) : 
00094   GeneralFad<T,Storage>(x) {}
00095 
00097       template <typename S> Expr(const Expr<S>& x) :
00098   GeneralFad<T,Storage>(x) {}
00099 
00101       ~Expr() {}
00102 
00104       void computePartials(const T& bar, T partials[]) const { 
00105   partials[0] = bar; 
00106       }
00107 
00109       void getTangents(int i, T dots[]) const { 
00110   if (i<this->size())
00111     dots[0] = this->fastAccessDx(i);
00112   else
00113     dots[0] = 0.0;
00114       }
00115 
00117       template <int Arg>
00118       bool isActive() const { return this->size() > 0; }
00119 
00121       bool isLinear() const { return true; }
00122 
00124       template <int Arg>
00125       T getTangent(int i) const { return this->fastAccessDx(i); }
00126 
00127       const base_expr_type& getArg(int j) const { return *this; }
00128 
00129     }; // class Expr<GeneralFad>
00130     
00132     template <typename T, typename S>
00133     struct ExprPromote< GeneralFad<T,S>, 
00134       typename GeneralFad<T,S>::value_type > {
00135       typedef GeneralFad<T,S> type;
00136     };
00137     
00139     template <typename T, typename S>
00140     struct ExprPromote< typename GeneralFad<T,S>::value_type, 
00141       GeneralFad<T,S> > {
00142       typedef GeneralFad<T,S> type;
00143     };
00144 
00146     template <typename T, typename S>
00147     struct ExprPromote< GeneralFad<T,S>, 
00148       typename dummy<typename GeneralFad<T,S>::value_type,
00149                typename GeneralFad<T,S>::scalar_type
00150                >::type > {
00151       typedef GeneralFad<T,S> type;
00152     };
00153     
00155     template <typename T, typename S>
00156     struct ExprPromote< typename dummy<typename GeneralFad<T,S>::value_type,
00157                typename GeneralFad<T,S>::scalar_type
00158                >::type, 
00159       GeneralFad<T,S> > {
00160       typedef GeneralFad<T,S> type;
00161     };
00162 
00163   } // namespace ELRCacheFad
00164 
00165 } // namespace Sacado
00166 
00167 #include "Sacado_ELRCacheFad_Ops.hpp"
00168 
00169 #endif // SACADO_ELRCACHEFAD_GENERALFADEXPR_HPP
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