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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 */
+