1 files changed, 83 insertions, 0 deletions
diff --git a/fuzzylite/src/rule/Expression.cpp b/fuzzylite/src/rule/Expression.cpp
new file mode 100644
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+++ b/fuzzylite/src/rule/Expression.cpp
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+/*
+ Author: Juan Rada-Vilela, Ph.D.
+ Copyright (C) 2010-2014 FuzzyLite Limited
+ All rights reserved
+
+ This file is part of fuzzylite.
+
+ fuzzylite is free software: you can redistribute it and/or modify it under
+ the terms of the GNU Lesser General Public License as published by the Free
+ Software Foundation, either version 3 of the License, or (at your option)
+ any later version.
+
+ fuzzylite is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with fuzzylite.  If not, see <http://www.gnu.org/licenses/>.
+
+ fuzzylite™ is a trademark of FuzzyLite Limited.
+
+ */
+
+#include "fl/rule/Expression.h"
+
+#include "fl/hedge/Hedge.h"
+#include "fl/term/Term.h"
+#include "fl/rule/Rule.h"
+#include "fl/variable/Variable.h"
+
+namespace fl {
+
+    Expression::Expression() {
+    }
+
+    Expression::~Expression() {
+    }
+
+    Proposition::Proposition()
+    : Expression(), variable(fl::null), term(fl::null) {
+    }
+
+    Proposition::~Proposition() {
+
+    }
+
+    std::string Proposition::toString() const {
+        std::ostringstream ss;
+        if (variable) {
+            ss << variable->getName();
+        } else {
+            ss << "?";
+        }
+        if (not hedges.empty()) {
+            ss << " " << Rule::isKeyword() << " ";
+            for (std::size_t i = 0; i < hedges.size(); ++i) {
+                ss << hedges.at(i)->name() << " ";
+            }
+        }
+
+        if (term) { //term is fl::null if hedge is any
+            if (hedges.empty()) {
+                ss << " " << Rule::isKeyword() << " ";
+            }
+            ss << term->getName();
+        }
+        return ss.str();
+    }
+
+    Operator::Operator() : Expression(), name(""), left(fl::null), right(fl::null) {
+    }
+
+    Operator::~Operator() {
+        if (left) delete left;
+        if (right) delete right;
+    }
+
+    std::string Operator::toString() const {
+        return name;
+    }
+
+}