source: trunk/src/xmlpatterns/api/qabstractxmlforwarditerator.cpp@ 1168

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/*!
  \class QAbstractXmlForwardIterator
  \brief The QAbstractXmlForwardIterator class is a base class for forward iterators.
  \reentrant
  \since 4.4
  \ingroup xml-tools
  \internal

  This abstract base class is for creating iterators for
  traversing custom data structures modeled to look like XML.
  An item can be instantiated in QAbstractXmlForwardIterator if:
  \list

  \o It has a default constructor, a copy constructor, and an
  assignment operator, and

  \o It has an appropriate qIsForwardIteratorEnd() function.
  \endlist

   @ingroup Patternist_iterators
   @author Frans Englich <[email protected]>
 */

/*!
 \typedef QAbstractXmlForwardIterator::Ptr

 A smart pointer wrapping an instance of a QAbstractXmlForwardIterator subclass.
 */

/*!
 \typedef QAbstractXmlForwardIterator::List
 A QList containing QAbstractXmlForwardIterator::Ptr instances.
 */

/*!
 \typedef QAbstractXmlForwardIterator::Vector
 A QVector containing QAbstractXmlForwardIterator::Ptr instances.
 */

/*!
  \fn QAbstractXmlForwardIterator::QAbstractXmlForwardIterator()

  Default constructor.
 */

/*!
  \fn QAbstractXmlForwardIterator::~QAbstractXmlForwardIterator()

  Destructor.
 */

/*!
  \fn T QAbstractXmlForwardIterator::next() = 0;

 Returns the next item in the sequence, or
 a null object if the end has been reached.
 */

/*!
  \fn T QAbstractXmlForwardIterator::current() const = 0;

  Returns the current item in the sequence. If this function is called
  before the first call to next(), a null object is returned. If the
  end of the sequence has been reached, a null object is returned.
 */

/*!
  \fn qint64 QAbstractXmlForwardIterator::position() const = 0;

   Returns the current position in the sequence represented
   by \e this.

   The first position is 1, not 0. If next() hasn't been called, 0 is
   returned. If \e this has reached the end, -1 is returned.
 */

/*!
  \fn bool qIsForwardIteratorEnd(const T &unit)
  \since 4.4
  \relates QAbstractXmlForwardIterator

  The Callback QAbstractXmlForwardIterator uses for determining
  whether \a unit is the end of a sequence.

  If \a unit is a value that would signal the end of a sequence
  (typically a default constructed value), this function returns \c
  true, otherwise \c false.

  This implementation works for any type that has a boolean operator.
  For example, this function should work satisfactory for pointers.
 */

/*!
  \fn qint64 QAbstractXmlForwardIterator::count()