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diff --git a/fuzzylite/src/hedge/HedgeFunction.cpp b/fuzzylite/src/hedge/HedgeFunction.cpp
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+++ b/fuzzylite/src/hedge/HedgeFunction.cpp
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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.
+ */
+
+#include "fl/hedge/HedgeFunction.h"
+
+namespace fl {
+
+    HedgeFunction::HedgeFunction(const std::string& formula) : Hedge() {
+        _function.variables["x"] = fl::nan;
+        if (not formula.empty()) {
+            _function.load(formula);
+        }
+    }
+
+    std::string HedgeFunction::name() const {
+        return "HedgeFunction";
+    }
+
+    Complexity HedgeFunction::complexity() const {
+        if (_function.root())
+            return _function.complexity().function(2 * std::log(scalar(_function.variables.size())));
+        return _function.complexity();
+    }
+
+    scalar HedgeFunction::hedge(scalar x) const {
+        _function.variables["x"] = x;
+        return _function.membership(x);
+    }
+
+    Function& HedgeFunction::function() {
+        return this->_function;
+    }
+
+    void HedgeFunction::setFormula(const std::string& formula) {
+        _function.load(formula);
+    }
+
+    std::string HedgeFunction::getFormula() const {
+        return _function.getFormula();
+    }
+
+    HedgeFunction* HedgeFunction::clone() const {
+        return new HedgeFunction(*this);
+    }
+
+    Hedge* HedgeFunction::constructor() {
+        return new HedgeFunction;
+    }
+
+}