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/*
fuzzylite (R), a fuzzy logic control library in C++.
Copyright (C) 2010-2017 FuzzyLite Limited. All rights reserved.
Author: Juan Rada-Vilela, Ph.D. <jcrada@fuzzylite.com>
This file is part of fuzzylite.
fuzzylite is free software: you can redistribute it and/or modify it under
the terms of the FuzzyLite License included with the software.
You should have received a copy of the FuzzyLite License along with
fuzzylite. If not, see <http://www.fuzzylite.com/license/>.
fuzzylite is a registered trademark of FuzzyLite Limited.
*/
#ifndef FL_HEDGEFUNCTION_H
#define FL_HEDGEFUNCTION_H
#include "fl/hedge/Hedge.h"
#include "fl/term/Function.h"
namespace fl {
/**
The HedgeFunction class is a customizable Hedge via Function, which
computes any function based on the @f$x@f$ value. This hedge is not
registered with the HedgeFactory due to issues configuring the formula
within. To register the hedge, a static method with the
constructor needs to be manually created and registered. Please, check the
file `test/hedge/HedgeFunction.cpp` for further details.
@author Juan Rada-Vilela, Ph.D.
@see Function
@see Hedge
@see HedgeFactory
@since 6.0
*/
class FL_API HedgeFunction FL_IFINAL : public Hedge {
private:
Function _function;
public:
explicit HedgeFunction(const std::string& formula = "");
std::string name() const FL_IOVERRIDE;
/**
Returns the reference to the Function
@return the reference to the Function
*/
Function& function();
/**
Loads the function with the given formula
@param formula is a valid formula in infix notation
*/
void setFormula(const std::string& formula);
/**
Returns the formula loaded into the function
@return the formula loaded into the function
*/
std::string getFormula() const;
Complexity complexity() const FL_IOVERRIDE;
/**
Computes the hedge for the membership function value @f$x@f$ utilizing
the given function via HedgeFunction::setFormula()
@param x is a membership function value
@return the evaluation of the function
*/
scalar hedge(scalar x) const FL_IOVERRIDE;
HedgeFunction* clone() const FL_IOVERRIDE;
static Hedge* constructor();
};
}
#endif /* FL_HEDGEFUNCTION_H */
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