ClhepEvaluator.h

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#ifndef ClhepEvaluator_h
#define ClhepEvaluator_h
 
#include <vector>
#include <string>
#include "CLHEP/Evaluator/Evaluator.h"
 
class ClhepEvaluator {
public:
  ClhepEvaluator();
 
  ~ClhepEvaluator();
 
  void set(const std::string& ns, const std::string& name, const std::string& exprValue);
 
  double eval(const std::string& ns, const std::string& expr);
 
  bool isDefined(const std::string& ns,   //< current namespace
                 const std::string& name  //< name of the variable inside current namespace
  );
 
  const std::vector<std::string>& variables() const { return variables_; }
  const std::vector<std::string>& values() const { return values_; }
 
 
  double eval(const char* expression);
 
  void set(const std::string& name, const std::string& value);
 
  void clear();
 
private:
  void prepare(const std::string& ns,          // input
               const std::string& name,        // input
               const std::string& exprValue,   // input
               std::string& nameResult,        // output
               std::string& valResult) const;  // output
 
  void throwex(const std::string& ns,
               const std::string& name,
               const std::string& expr,
               const std::string& reason,
               int idx = 0) const;
 
  void checkname(const std::string& name) const;
 
  HepTool::Evaluator evaluator_;
  std::vector<std::string> variables_;
  std::vector<std::string> values_;
};
 
#endif