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_ZEROEXPR_H 00032 #define SUNDANCE_ZEROEXPR_H 00033 00034 #include "SundanceConstantExpr.hpp" 00035 00036 namespace Sundance 00037 { 00038 using namespace Sundance; 00039 class ZeroExpr : public ConstantExpr 00040 { 00041 public: 00042 /** */ 00043 ZeroExpr(); 00044 00045 /** */ 00046 virtual ~ZeroExpr() {;} 00047 00048 /** */ 00049 virtual Set<MultipleDeriv> 00050 internalFindW(int order, const EvalContext& context) const ; 00051 00052 /** Find spatially-constant functional derivatives */ 00053 virtual Set<MultipleDeriv> 00054 internalFindC(int order, const EvalContext& context) const ; 00055 00056 00057 00058 /** */ 00059 virtual RCP<ExprBase> getRcp() {return rcp(this);} 00060 protected: 00061 private: 00062 }; 00063 } 00064 00065 #endif