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diff --git a/src/qml/qml/v4vm/qv4regexp.h b/src/qml/qml/v4vm/qv4regexp.h
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+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the V4VM module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef QV4REGEXP_H
+#define QV4REGEXP_H
+
+#include <QString>
+#include <QVector>
+
+#include <wtf/RefPtr.h>
+#include <wtf/FastAllocBase.h>
+#include <wtf/BumpPointerAllocator.h>
+
+#include <limits.h>
+
+#include <yarr/Yarr.h>
+#include <yarr/YarrInterpreter.h>
+
+#include "qv4managed.h"
+#include "qv4engine.h"
+
+QT_BEGIN_NAMESPACE
+
+namespace QQmlJS {
+namespace VM {
+
+struct ExecutionEngine;
+
+struct RegExpCacheKey
+{
+    RegExpCacheKey(const QString &pattern, bool ignoreCase, bool multiLine)
+        : pattern(pattern)
+        , ignoreCase(ignoreCase)
+        , multiLine(multiLine)
+    { }
+    explicit inline RegExpCacheKey(const RegExp *re);
+
+    bool operator==(const RegExpCacheKey &other) const
+    { return pattern == other.pattern && ignoreCase == other.ignoreCase && multiLine == other.multiLine; }
+    bool operator!=(const RegExpCacheKey &other) const
+    { return !operator==(other); }
+
+    QString pattern;
+    uint ignoreCase : 1;
+    uint multiLine : 1;
+};
+
+inline uint qHash(const RegExpCacheKey& key, uint seed = 0) Q_DECL_NOTHROW
+{ return qHash(key.pattern, seed); }
+
+class RegExpCache : public QHash<RegExpCacheKey, RegExp*>
+{
+public:
+    ~RegExpCache();
+};
+
+class RegExp : public Managed
+{
+public:
+    static RegExp* create(ExecutionEngine* engine, const QString& pattern, bool ignoreCase = false, bool multiline = false);
+    ~RegExp();
+
+    QString pattern() const { return m_pattern; }
+
+    bool isValid() const { return m_byteCode.get(); }
+
+    uint match(const QString& string, int start, uint *matchOffsets) const;
+
+    bool ignoreCase() const { return m_ignoreCase; }
+    bool multiLine() const { return m_multiLine; }
+    int captureCount() const { return m_subPatternCount + 1; }
+
+protected:
+    static const ManagedVTable static_vtbl;
+    static void destroy(Managed *that);
+    static void markObjects(Managed *that);
+    static Value get(Managed *m, ExecutionContext *ctx, String *name, bool *hasProperty);
+    static Value getIndexed(Managed *m, ExecutionContext *ctx, uint index, bool *hasProperty);
+    static void put(Managed *m, ExecutionContext *ctx, String *name, const Value &value);
+    static void putIndexed(Managed *m, ExecutionContext *ctx, uint index, const Value &value);
+    static PropertyAttributes query(Managed *m, ExecutionContext *ctx, String *name);
+    static PropertyAttributes queryIndexed(Managed *m, ExecutionContext *ctx, uint index);
+    static bool deleteProperty(Managed *m, ExecutionContext *ctx, String *name);
+    static bool deleteIndexedProperty(Managed *m, ExecutionContext *ctx, uint index);
+
+
+private:
+    friend class RegExpCache;
+    Q_DISABLE_COPY(RegExp);
+    RegExp(ExecutionEngine* engine, const QString& pattern, bool ignoreCase, bool multiline);
+
+    const QString m_pattern;
+    OwnPtr<JSC::Yarr::BytecodePattern> m_byteCode;
+    RegExpCache *m_cache;
+    int m_subPatternCount;
+    const bool m_ignoreCase;
+    const bool m_multiLine;
+};
+
+inline RegExpCacheKey::RegExpCacheKey(const RegExp *re)
+    : pattern(re->pattern())
+    , ignoreCase(re->ignoreCase())
+    , multiLine(re->multiLine())
+{}
+
+
+} // end of namespace VM
+} // end of namespace QQmlJS
+
+QT_END_NAMESPACE
+
+#endif // QV4REGEXP_H