Long live Qt!

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diff --git a/src/xmlpatterns/expr/qvariabledeclaration_p.h b/src/xmlpatterns/expr/qvariabledeclaration_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_VariableDeclaration_H
+#define Patternist_VariableDeclaration_H
+
+#include <QSharedData>
+
+#include "qexpression_p.h"
+#include "qpatternistlocale_p.h"
+#include "qvariablereference_p.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+template<typename T> class QStack;
+
+namespace QPatternist
+{
+    /**
+     * @short Represents a declared variable. Only used at
+     * the compilation stage.
+     *
+     * @see FunctionArgument
+     * @author Frans Englich <fenglich@trolltech.com>
+     * @ingroup Patternist_expressions
+     */
+    class VariableDeclaration : public QSharedData
+    {
+    public:
+        typedef QExplicitlySharedDataPointer<VariableDeclaration> Ptr;
+        typedef QStack<VariableDeclaration::Ptr> Stack;
+        typedef QList<VariableDeclaration::Ptr> List;
+
+        /**
+         * @short The key is the variable name.
+         */
+        typedef QHash<QXmlName, VariableDeclaration::Ptr> Hash;
+
+        enum Type
+        {
+            RangeVariable,
+            ExpressionVariable,
+            FunctionArgument,
+            PositionalVariable,
+            TemplateParameter,
+
+            /**
+             * A global variable is always an external variable, but it is
+             * cached differently.
+             *
+             * @see DynamicContext::globalItemCacheCell()
+             */
+            GlobalVariable,
+
+            /**
+             * External variables doesn't use slots, that's a big difference
+             * compared to the other types.
+             */
+            ExternalVariable
+        };
+
+        /**
+         * Creates a VariableDeclaration.
+         *
+         * @p sourceExpr and @p seqType may be @c null.
+         */
+        VariableDeclaration(const QXmlName n,
+                            const VariableSlotID varSlot,
+                            const Type t,
+                            const SequenceType::Ptr &seqType) : name(n)
+                                                              , slot(varSlot)
+                                                              , type(t)
+                                                              , sequenceType(seqType)
+                                                              , canSourceRewrite(true)
+        {
+            Q_ASSERT(!name.isNull());
+            Q_ASSERT(t == ExternalVariable || t == TemplateParameter || varSlot > -1);
+        }
+
+        inline bool isUsed() const
+        {
+            return !references.isEmpty();
+        }
+
+        inline const Expression::Ptr &expression() const
+        {
+            return m_expression;
+        }
+
+        inline void setExpression(const Expression::Ptr &expr)
+        {
+            m_expression = expr;
+        }
+
+        /**
+         * @short Returns how many times this variable is used.
+         */
+        inline bool usedByMany() const
+        {
+            return references.count() > 1;
+        }
+
+        /**
+         * @short Returns @c true if @p list contains @p lookup.
+         */
+        static bool contains(const VariableDeclaration::List &list,
+                             const QXmlName &lookup);
+
+        const QXmlName                  name;
+        const VariableSlotID            slot;
+        const Type                      type;
+
+        /**
+         * The declared type of the variable. What the value might be, depends
+         * on the context which VariableDeclaration is used in. Note that
+         * sequenceType is hence not in anyway obligated to the type of
+         * expression().
+         */
+        const SequenceType::Ptr         sequenceType;
+        VariableReference::List         references;
+
+        /**
+         * @short Whether a reference can rewrite itself to expression().
+         *
+         * The default value is @c true.
+         */
+        bool canSourceRewrite;
+
+    private:
+        Expression::Ptr                 m_expression;
+        Q_DISABLE_COPY(VariableDeclaration)
+    };
+
+    /**
+     * @short Formats @p var appropriately for display.
+     *
+     * @relates VariableDeclaration
+     */
+    static inline QString formatKeyword(const VariableDeclaration::Ptr &var,
+                                        const NamePool::Ptr &np)
+    {
+        Q_ASSERT(var);
+        Q_ASSERT(np);
+        return formatKeyword(np->displayName(var->name));
+    }
+
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif