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Sacado_ELRFad_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_ELRFAD_GENERALFADEXPR_HPP
00033 #define SACADO_ELRFAD_GENERALFADEXPR_HPP
00034 
00035 #include "Sacado_ELRFad_GeneralFad.hpp"
00036 
00037 namespace Sacado {
00038 
00039   namespace ELRFad {
00040 
00042 
00047     template <typename T, typename Storage> 
00048     class Expr< GeneralFad<T,Storage> > : public GeneralFad<T,Storage> {
00049 
00050     public:
00051 
00053       typedef T value_type;
00054 
00056       typedef GeneralFad<T,Storage> base_expr_type;
00057 
00059       static const int num_args = 1;
00060 
00062       static const bool is_linear = true;
00063 
00065       Expr() : 
00066   GeneralFad<T,Storage>() {}
00067 
00069 
00072       Expr(const T & x) : 
00073   GeneralFad<T,Storage>(x) {}
00074 
00076 
00079       Expr(const int sz, const T & x) : 
00080   GeneralFad<T,Storage>(sz,x) {}
00081 
00083 
00088       Expr(const int sz, const int i, const T & x) : 
00089   GeneralFad<T,Storage>(sz,i,x) {}
00090 
00092       Expr(const Expr& x) : 
00093   GeneralFad<T,Storage>(x) {}
00094 
00096       template <typename S> Expr(const Expr<S>& x) :
00097   GeneralFad<T,Storage>(x) {}
00098 
00100       ~Expr() {}
00101 
00103       void computePartials(const T& bar, T partials[]) const { 
00104   partials[0] = bar; 
00105       }
00106 
00108       void getTangents(int i, T dots[]) const { 
00109   if (i<this->size())
00110     dots[0] = this->fastAccessDx(i);
00111   else
00112     dots[0] = 0.0;
00113       }
00114 
00116       template <int Arg>
00117       bool isActive() const { return this->size() > 0; }
00118 
00120       bool isActive2(int j) const { return this->size() > 0; }
00121 
00123       bool isLinear() const { return true; }
00124 
00126       template <int Arg>
00127       const T& getTangent(int i) const { return this->fastAccessDx(i); }
00128 
00130       const T* getDx(int j) const { return this->dx(); }
00131 
00132       const base_expr_type& getArg(int j) const { return *this; }
00133 
00134       int numActiveArgs() const {
00135   return this->size() > 0 ? 1 : 0;
00136       }
00137 
00139       void computeActivePartials(const T& bar, T *partials) const { 
00140   if (this->size() > 0)
00141     partials[0] = bar; 
00142       }
00143 
00144     }; // class Expr<GeneralFad>
00145     
00147     template <typename T, typename S>
00148     struct ExprPromote< GeneralFad<T,S>, T > {
00149       typedef GeneralFad<T,S> type;
00150     };
00151     
00153     template <typename T, typename S>
00154     struct ExprPromote< T, GeneralFad<T,S> > {
00155       typedef GeneralFad<T,S> type;
00156     };
00157 
00158   } // namespace ELRFad
00159 
00160 } // namespace Sacado
00161 
00162 #include "Sacado_ELRFad_Ops.hpp"
00163 
00164 #endif // SACADO_ELRFAD_GENERALFADEXPR_HPP
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