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diff --git a/src/xmlpatterns/expr/qcallsite_p.h b/src/xmlpatterns/expr/qcallsite_p.h
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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_CallSite_H
+#define Patternist_CallSite_H
+
+#include "qunlimitedcontainer_p.h"
+#include "qcalltargetdescription_p.h"
+#include "qxmlname.h"
+
+QT_BEGIN_HEADER
+QT_BEGIN_NAMESPACE
+
+namespace QPatternist
+{
+    /**
+     * @short Abstract base-class for Expression instances that are callsites
+     * to other components, such as templates or user functions.
+     *
+     * @author Frans Englich <fenglich@trolltech.com>
+     * @ingroup Patternist_expressions
+     * @since 4.5
+     */
+    class CallSite : public UnlimitedContainer
+    {
+    public:
+        QXmlName name() const;
+        bool isRecursive() const;
+        void setIsRecursive(const bool value);
+
+        /**
+         * Called in the earliest stages of the compilation process. @p sign can
+         * be any function signature for a user declared function. If @p sign
+         * matches this UserFunctionCallsite, it means the UserFunction represented
+         * by @p sign is recursive and that this UserFunctionCallsite should take
+         * appropriate measures.
+         *
+         * @returns @c true if is recursive, otherwise @c false
+         */
+        virtual bool configureRecursion(const CallTargetDescription::Ptr &sign) = 0;
+
+        /**
+         * @short Returns the body of the function/template/component that is
+         * being called.
+         */
+        virtual Expression::Ptr body() const = 0;
+
+        virtual CallTargetDescription::Ptr callTargetDescription() const = 0;
+
+    protected:
+        CallSite(const QXmlName &name = QXmlName());
+
+    private:
+        Q_DISABLE_COPY(CallSite)
+        bool            m_isRecursive;
+        const QXmlName  m_name;
+    };
+}
+
+QT_END_NAMESPACE
+QT_END_HEADER
+
+#endif