--- /dev/null
+/****************************************************************************
+**
+** Copyright (C) Qxt Foundation. Some rights reserved.
+**
+** This file is part of the QxtCore module of the Qt eXTension library
+**
+** This library is free software; you can redistribute it and/or modify it
+** under the terms of th Common Public License, version 1.0, as published by
+** IBM.
+**
+** This file is provided "AS IS", without WARRANTIES OR CONDITIONS OF ANY
+** KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY
+** WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR
+** FITNESS FOR A PARTICULAR PURPOSE.
+**
+** You should have received a copy of the CPL along with this file.
+** See the LICENSE file and the cpl1.0.txt file included with the source
+** distribution for more information. If you did not receive a copy of the
+** license, contact the Qxt Foundation.
+**
+** <http://libqxt.sourceforge.net> <foundation@libqxt.org>
+**
+****************************************************************************/
+
+#ifndef QXTNULL_DEFINED
+#define QXTNULL_DEFINED
+#include <qxtglobal.h>
+
+/**
+\class QxtNull QxtNull
+
+
+\ingroup core
+
+\brief An object representing the "null" value for QxtNullable.
+
+seealso: QxtNullable
+*/
+
+struct QXT_CORE_EXPORT QxtNull
+{
+ /** integer cast operator
+ * In expressions, QxtNull behaves as an integer zero for compatibility with generic functions.
+ */
+ operator int() const
+ {
+ return 0;
+ }
+ enum { isNull = true };
+};
+
+/*! \relates QxtNull
+ * A predefined null object that can be assigned to any QxtNullable object.
+ */
+extern QxtNull qxtNull;
+
+#ifndef QXT_NO_MACROS
+/*! \relates QxtNull
+ * A convenience alias for qxtNull.
+ */
+#define SKIP qxtNull
+#endif
+
+#endif