/data/refman/pasoursint/CMSSW_5_2_7_hltpatch2/src/DetectorDescription/ExprAlgo/interface/ExprEvalInterface.h

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#ifndef ExprEvalInterface_h
#define ExprEvalInterface_h

#include <string>
//#include <vector>
//#include <utility>

class ExprEvalInterface
{
public:
  //ExprEvalInterface();
  virtual ~ExprEvalInterface();

  virtual 
  void set(const std::string & ns, //< current namespace
           const std::string & name, //< name of variable inside current namespace
           const std::string & valueExpr
           ) = 0;
  
  virtual 
  double eval(const std::string & ns, //< current namespace
              const std::string & expr //< expression to be evaluated inside current namespace
             ) = 0;
  
  virtual
  bool isDefined(const std::string & ns, //< current namespace
                 const std::string & name //< name of the variable inside current namespace
                 ) = 0;


  //virtual size_t dictionary(std::vector<pair<std::string,std::string>,double> & result) const; 
  
  virtual
  void clear() = 0;  
};

#endif