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00023 #ifndef libmath_calculator_h
00024 #define libmath_calculator_h
00025
00026 #include <math++/visitor.h>
00027 #include <math++/error.h>
00028
00029 #include <string>
00030 #include <map>
00031
00032 namespace math {
00033
00034 template<class> class TFunction;
00035 template<class> class TLibrary;
00036
00041 class ECalcError : public EMath {
00042 public:
00043 ECalcError(const std::string& AReason) : EMath(AReason) {}
00044 };
00045
00050 template<class T>
00051 class TCalculator : protected TNodeVisitor<T> {
00052 public:
00054 static T calculate(const TFunction<T>& AFunction, const T& AParam,
00055 const TLibrary<T>& ALibrary, unsigned ARecursionLimit = 64);
00056
00057 private:
00058 T FParam;
00059 const TLibrary<T>& FLibrary;
00060 std::map<std::string, unsigned> FRecursions;
00061 unsigned FLimit;
00062 T FResult;
00063
00064 private:
00066 TCalculator(const TFunction<T>& AFunction, const T& AParam,
00067 const TLibrary<T>& ALibrary, unsigned ALimit);
00068
00070 T calculate(const TNode<T> *AExpression);
00071
00072 virtual void visit(TNumberNode<T> *);
00073 virtual void visit(TSymbolNode<T> *);
00074 virtual void visit(TParamNode<T> *);
00075
00076 virtual void visit(TPlusNode<T> *);
00077 virtual void visit(TNegNode<T> *);
00078
00079 virtual void visit(TMulNode<T> *);
00080 virtual void visit(TDivNode<T> *);
00081
00082 virtual void visit(TPowNode<T> *);
00083 virtual void visit(TSqrtNode<T> *);
00084
00085 virtual void visit(TSinNode<T> *);
00086 virtual void visit(TCosNode<T> *);
00087 virtual void visit(TTanNode<T> *);
00088 virtual void visit(TLnNode<T> *);
00089
00090 virtual void visit(TFuncNode<T> *);
00091 virtual void visit(TIfNode<T> *);
00092
00093 virtual void visit(TEquNode<T> *);
00094 virtual void visit(TUnEquNode<T> *);
00095 virtual void visit(TGreaterNode<T> *);
00096 virtual void visit(TLessNode<T> *);
00097 virtual void visit(TGreaterEquNode<T> *);
00098 virtual void visit(TLessEquNode<T> *);
00099 };
00100
00101 }
00102
00103 #include <math++/calculator.tcc>
00104
00105 #endif