text: /****************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
  **
  ** This file is part of the QtXmlPatterns module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL21$
  ** 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 The Qt Company. For licensing terms
  ** and conditions see http://www.qt.io/terms-conditions. For further
  ** information use the contact form at http://www.qt.io/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 or version 3 as published by the Free
  ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
  ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
  ** following information to ensure the GNU Lesser General Public License
  ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
  ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  **
  ** As a special exception, The Qt Company gives you certain additional
  ** rights. These rights are described in The Qt Company LGPL Exception
  ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  //
  //  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_PositionVariableReference_H
  #define Patternist_PositionVariableReference_H
  
  #include <private/qvariablereference_p.h>
  
  QT_BEGIN_NAMESPACE
  
  namespace QPatternist
  {
      /**
       * @short A reference to an @c at variable, declared with the
       * <tt>for</tt>-part in XQuery's FLWOR expression.
       *
       * @author Frans Englich <frans.englich@nokia.com>
       * @ingroup Patternist_expressions
       */
      class PositionalVariableReference : public VariableReference
      {
      public:
          typedef QExplicitlySharedDataPointer<PositionalVariableReference> Ptr;
          PositionalVariableReference(const VariableSlotID slot);
  
          virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
  
          /**
           * Returns always @c true, since a positional variable is always one or more, and the
           * Effective %Boolean Value for that range is always @c true.
           *
           * @returns always @c true
           */
          virtual bool evaluateEBV(const DynamicContext::Ptr &context) const;
  
          /**
           * @returns always CommonSequenceTypes::ExactlyOneInteger
           */
          virtual SequenceType::Ptr staticType() const;
  
          virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
          virtual Properties properties() const;
      };
  }
  
  QT_END_NAMESPACE
  
  #endif
  