Detailed Description
The QMapConstIterator class provides an iterator for QMap.
In contrast to QMapIterator, this class is used to iterate over a
const map. It does not allow you to modify the values of the map
because this would break the const semantics.
For more information on QMap iterators, see QMapIterator and
the QMap example.
See also QMap, QMapIterator, Qt Template Library Classes and Non-GUI Classes.
Member Type Documentation
QMapConstIterator::iterator_category
The type of iterator category, std::bidirectional_iterator_tag.
QMapConstIterator::pointer
Const pointer to value_type.
QMapConstIterator::reference
Const reference to value_type.
QMapConstIterator::value_type
The type of const value.
Member Function Documentation
QMapConstIterator::QMapConstIterator ()
Constructs an uninitialized iterator.
QMapConstIterator::QMapConstIterator ( QMapNode<K, T> * p )
Constructs an iterator starting at node p.
QMapConstIterator::QMapConstIterator ( const QMapConstIterator<K, T> & it )
Constructs a copy of the iterator, it.
QMapConstIterator::QMapConstIterator ( const QMapIterator<K, T> & it )
Constructs a copy of the iterator, it.
const T & QMapConstIterator::data () const
Returns a const reference to the current item's data.
const K & QMapConstIterator::key () const
Returns a const reference to the current item's key.
bool QMapConstIterator::operator!= ( const QMapConstIterator<K, T> & it ) const
Compares the iterator to the it iterator and returns FALSE if
they point to the same item; otherwise returns TRUE.
const T & QMapConstIterator::operator* () const
Dereference operator. Returns a const reference to the current
item's data. The same as data().
QMapConstIterator<K, T> & QMapConstIterator::operator++ ()
Prefix ++ makes the succeeding item current and returns an
iterator pointing to the new current item. The iterator cannot
check whether it reached the end of the map. Incrementing the
iterator returned by end() causes undefined results.
QMapConstIterator<K, T> QMapConstIterator::operator++ ( int )
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
Postfix ++ makes the succeeding item current and returns an
iterator pointing to the new current item. The iterator cannot
check whether it reached the end of the map. Incrementing the
iterator returned by end() causes undefined results.
QMapConstIterator<K, T> & QMapConstIterator::operator-- ()
Prefix -- makes the previous item current and returns an iterator
pointing to the new current item. The iterator cannot check
whether it reached the beginning of the map. Decrementing the
iterator returned by begin() causes undefined results.
QMapConstIterator<K, T> QMapConstIterator::operator-- ( int )
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
Postfix -- makes the previous item current and returns an iterator
pointing to the new current item. The iterator cannot check
whether it reached the beginning of the map. Decrementing the
iterator returned by begin() causes undefined results.
bool QMapConstIterator::operator== ( const QMapConstIterator<K, T> & it ) const
Compares the iterator to the it iterator and returns TRUE if
they point to the same item; otherwise returns FALSE.
This file is part of the Qt toolkit.
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