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00001 #ifndef RELATIONALEXPR_H 00002 #define RELATIONALEXPR_H 00003 00004 #include "SundanceDefs.h" 00005 00006 #include "LogicalExprBase.h" 00007 #include "Expr.h" 00008 00009 namespace Sundance 00010 { 00011 00012 using namespace TSF; 00013 using std::string; 00014 00015 using std::ostream; 00016 00017 /** \ingroup LowLevelSymbolics 00018 * \enum RelationalOperator 00019 */ 00020 enum RelationalOperator {RelEQ, RelNEQ, RelLT, RelGT, RelLE, RelGE}; 00021 00022 00023 /** 00024 * \ingroup LowLevelSymbolics 00025 */ 00026 class RelationalExpr : public LogicalExprBase 00027 { 00028 public: 00029 /** construct with operands and an operator type */ 00030 RelationalExpr(const Expr& left, const Expr& right, 00031 const RelationalOperator& op) 00032 : LogicalExprBase(), left_(left), right_(right), op_(op) {;} 00033 00034 /** */ 00035 virtual ~RelationalExpr(){;} 00036 00037 /** */ 00038 virtual bool evaluate(const Cell& cell) const ; 00039 00040 /** write to XML form */ 00041 virtual XMLObject toXML() const ; 00042 00043 /** test equality between expressions */ 00044 virtual bool equals(const LogicalExpr& other) const ; 00045 00046 /** test ordering between expressions */ 00047 virtual bool lessThan(const LogicalExpr& other) const ; 00048 00049 private: 00050 Expr left_; 00051 Expr right_; 00052 RelationalOperator op_; 00053 00054 }; 00055 00056 00057 00058 } 00059 #endif 00060 00061 00062 00063 00064