Utils/src/formulaUnaryMinusEvaluator.h

0001 #ifndef CommonTools_Utils_formulaUnaryMinusEvaluator_h
0002 #define CommonTools_Utils_formulaUnaryMinusEvaluator_h
0003 // -*- C++ -*-
0004 //
0005 // Package:     CommonTools/Utils
0006 // Class  :     formulaUnaryMinusEvaluator
0007 //
0008 /**\class reco::formula::UnaryMinusEvaluator formulaUnaryMinusEvaluator.h "formulaUnaryMinusEvaluator.h"
0009
0010  Description: [one line class summary]
0011
0012  Usage:
0013     <usage>
0014
0015 */
0016 //
0017 // Original Author:  Christopher Jones
0018 //         Created:  Wed, 23 Sep 2015 17:41:33 GMT
0019 //
0020
0021 // system include files
0022 #include <memory>
0023 #include <functional>
0024
0025 // user include files
0026 #include "formulaEvaluatorBase.h"
0027
0028 // forward declarations
0029
0030 namespace reco {
0031   namespace formula {
0032     class UnaryMinusEvaluator : public EvaluatorBase {
0033     public:
0034       explicit UnaryMinusEvaluator(std::shared_ptr<EvaluatorBase> iArg)
0035           : EvaluatorBase(Precedence::kUnaryMinusOperator), m_arg(std::move(iArg)) {}
0036
0037       // ---------- const member functions ---------------------
0038       double evaluate(double const* iVariables, double const* iParameters) const final {
0039         return -1. * m_arg->evaluate(iVariables, iParameters);
0040       }
0041       std::vector<std::string> abstractSyntaxTree() const final {
0042         auto ret = shiftAST(m_arg->abstractSyntaxTree());
0043         ret.emplace(ret.begin(), "unary minus");
0044         return ret;
0045       }
0046
0047       UnaryMinusEvaluator(const UnaryMinusEvaluator&) = delete;
0048
0049       const UnaryMinusEvaluator& operator=(const UnaryMinusEvaluator&) = delete;
0050
0051     private:
0052       // ---------- member data --------------------------------
0053       std::shared_ptr<EvaluatorBase> m_arg;
0054     };
0055   }  // namespace formula
0056 }  // namespace reco
0057
0058 #endif