00001 /* @HEADER@ */ 00002 // ************************************************************************ 00003 // 00004 // Sundance 00005 // Copyright (2005) Sandia Corporation 00006 // 00007 // Copyright (year first published) Sandia Corporation. Under the terms 00008 // of Contract DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government 00009 // retains certain rights in this software. 00010 // 00011 // This library is free software; you can redistribute it and/or modify 00012 // it under the terms of the GNU Lesser General Public License as 00013 // published by the Free Software Foundation; either version 2.1 of the 00014 // License, or (at your option) any later version. 00015 // 00016 // This library is distributed in the hope that it will be useful, but 00017 // WITHOUT ANY WARRANTY; without even the implied warranty of 00018 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00019 // Lesser General Public License for more details. 00020 // 00021 // You should have received a copy of the GNU Lesser General Public 00022 // License along with this library; if not, write to the Free Software 00023 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 00024 // USA 00025 // Questions? Contact Kevin Long (krlong@sandia.gov), 00026 // Sandia National Laboratories, Livermore, California, USA 00027 // 00028 // ************************************************************************ 00029 /* @HEADER@ */ 00030 00031 #ifndef SUNDANCE_CONSTANTEXPR_H 00032 #define SUNDANCE_CONSTANTEXPR_H 00033 00034 #include "SundanceSpatiallyConstantExpr.hpp" 00035 00036 namespace Sundance 00037 { 00038 00039 /** 00040 * ConstantExpr contains an immutable constant, to be distinguished 00041 * from a parameter that is constant in space but can change 00042 * during the course of a simulation. 00043 */ 00044 class ConstantExpr : public SpatiallyConstantExpr 00045 { 00046 public: 00047 ConstantExpr(const double& value); 00048 virtual ~ConstantExpr() {;} 00049 00050 /** */ 00051 virtual std::ostream& toText(std::ostream& os, bool paren) const ; 00052 00053 /** */ 00054 virtual XMLObject toXML() const ; 00055 00056 /** */ 00057 virtual bool isImmutable() const {return true;} 00058 00059 00060 /** */ 00061 virtual void setValue(const double& value) {value_ = value;} 00062 00063 /** */ 00064 virtual const double& value() const {return value_;} 00065 00066 /** Ordering operator for use in transforming exprs to standard form */ 00067 virtual bool lessThan(const ScalarExpr* other) const ; 00068 00069 /** */ 00070 virtual Set<MultipleDeriv> 00071 internalFindW(int order, const EvalContext& context) const ; 00072 00073 /** Find spatially-constant functional derivatives */ 00074 virtual Set<MultipleDeriv> 00075 internalFindC(int order, const EvalContext& context) const ; 00076 00077 /** Find spatially-variable functional derivatives */ 00078 virtual Set<MultipleDeriv> 00079 internalFindV(int order, const EvalContext& context) const ; 00080 00081 00082 00083 /** */ 00084 virtual RCP<ExprBase> getRcp() {return rcp(this);} 00085 00086 00087 protected: 00088 private: 00089 double value_; 00090 }; 00091 } 00092 00093 #endif