Long live Qt 4.5!

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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtXmlPatterns module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+
+#ifndef Patternist_AtomicMathematician_H
+#define Patternist_AtomicMathematician_H
+
+#include <QFlags>
+
+#include "qdynamiccontext_p.h"
+#include "qitem_p.h"
+#include "qatomictypedispatch_p.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+namespace QPatternist
+{
+    /**
+     * @short Base class for classes that performs arithmetic operations between atomic values.
+     *
+     * @ingroup Patternist_xdm
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class Q_AUTOTEST_EXPORT AtomicMathematician : public AtomicTypeVisitorResult
+    {
+    public:
+        virtual ~AtomicMathematician();
+
+        typedef QExplicitlySharedDataPointer<AtomicMathematician> Ptr;
+
+        enum Operator
+        {
+            /**
+             * @see <a href="http://www.w3.org/TR/xpath-functions/#func-numeric-divide">XQuery 1.0
+             * and XPath 2.0 Functions and Operators, 6.2.4 op:numeric-divide</a>
+             */
+            Div         = 1,
+
+            /**
+             * @see <a href="http://www.w3.org/TR/xpath-functions/#func-numeric-integer-divide">XQuery 1.0
+             * and XPath 2.0 Functions and Operators, 6.2.5 op:numeric-integer-divide</a>
+             */
+            IDiv        = 2,
+
+            /**
+             * @see <a href="http://www.w3.org/TR/xpath-functions/#func-numeric-subtract">XQuery 1.0
+             * and XPath 2.0 Functions and Operators, 6.2.2 op:numeric-subtract</a>
+             */
+            Substract   = 4,
+
+            /**
+             * @see <a href="http://www.w3.org/TR/xpath-functions/#func-numeric-mod">XQuery 1.0
+             * and XPath 2.0 Functions and Operators, 6.2.6 op:numeric-mod</a>
+             */
+            Mod         = 8,
+
+            /**
+             * @see <a href="http://www.w3.org/TR/xpath-functions/#func-numeric-multiply">XQuery 1.0
+             * and XPath 2.0 Functions and Operators, 6.2.3 op:numeric-multiply</a>
+             */
+            Multiply    = 16,
+
+            /**
+             * @see <a href="http://www.w3.org/TR/xpath-functions/#func-numeric-add">XQuery 1.0
+             * and XPath 2.0 Functions and Operators, 6.2.1 op:numeric-add</a>
+             */
+            Add         = 32
+        };
+
+        typedef QFlags<Operator> Operators;
+
+        virtual Item calculate(const Item &operand1,
+                                    const Operator op,
+                                    const Item &operand2,
+                                    const QExplicitlySharedDataPointer<DynamicContext> &context) const = 0;
+
+        static QString displayName(const AtomicMathematician::Operator op);
+
+    };
+    Q_DECLARE_OPERATORS_FOR_FLAGS(AtomicMathematician::Operators)
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif