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#ifndef CommonTools_Utils_formulaUnaryMinusEvaluator_h
#define CommonTools_Utils_formulaUnaryMinusEvaluator_h
// -*- C++ -*-
//
// Package: CommonTools/Utils
// Class : formulaUnaryMinusEvaluator
//
/**\class reco::formula::UnaryMinusEvaluator formulaUnaryMinusEvaluator.h "formulaUnaryMinusEvaluator.h"
Description: [one line class summary]
Usage:
<usage>
*/
//
// Original Author: Christopher Jones
// Created: Wed, 23 Sep 2015 17:41:33 GMT
//
// system include files
#include <memory>
#include <functional>
// user include files
#include "formulaEvaluatorBase.h"
// forward declarations
namespace reco {
namespace formula {
class UnaryMinusEvaluator : public EvaluatorBase {
public:
explicit UnaryMinusEvaluator(std::shared_ptr<EvaluatorBase> iArg)
: EvaluatorBase(Precedence::kUnaryMinusOperator), m_arg(std::move(iArg)) {}
// ---------- const member functions ---------------------
double evaluate(double const* iVariables, double const* iParameters) const final {
return -1. * m_arg->evaluate(iVariables, iParameters);
}
std::vector<std::string> abstractSyntaxTree() const final {
auto ret = shiftAST(m_arg->abstractSyntaxTree());
ret.emplace(ret.begin(), "unary minus");
return ret;
}
UnaryMinusEvaluator(const UnaryMinusEvaluator&) = delete;
const UnaryMinusEvaluator& operator=(const UnaryMinusEvaluator&) = delete;
private:
// ---------- member data --------------------------------
std::shared_ptr<EvaluatorBase> m_arg;
};
} // namespace formula
} // namespace reco
#endif
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