QMutableLinkedListIterator Class Reference

Member Function Documentation

QMutableLinkedListIterator::QMutableLinkedListIterator ( QLinkedList<T> & list )

Constructs an iterator for traversing list. The iterator is set to be at the front of the list (before the first item).

See also operator=().

QMutableLinkedListIterator::~QMutableLinkedListIterator ()

Destroys the iterator.

See also operator=().

bool QMutableLinkedListIterator::findNext ( const T & value )

Searches for value starting from the current iterator position forward. Returns true if value is found; otherwise returns false.

After the call, if value was found, the iterator is positioned just after the matching item; otherwise, the iterator is positioned at the back of the container.

See also findPrevious().

bool QMutableLinkedListIterator::findPrevious ( const T & value )

Searches for value starting from the current iterator position backward. Returns true if value is found; otherwise returns false.

After the call, if value was found, the iterator is positioned just before the matching item; otherwise, the iterator is positioned at the front of the container.

See also findNext().

bool QMutableLinkedListIterator::hasNext () const

Returns true if there is at least one item ahead of the iterator, i.e. the iterator is not at the back of the container; otherwise returns false.

See also hasPrevious() and next().

bool QMutableLinkedListIterator::hasPrevious () const

Returns true if there is at least one item behind the iterator, i.e. the iterator is not at the front of the container; otherwise returns false.

See also hasNext() and previous().

void QMutableLinkedListIterator::insert ( const T & value )

Inserts value at the current iterator position. After the call, the iterator is located just after the inserted item.

See also remove() and setValue().

T & QMutableLinkedListIterator::next ()

Returns a reference to the next item, and advances the iterator by one position.

Calling this function on an iterator located at the back of the container leads to undefined results.

See also hasNext(), peekNext(), and previous().

T & QMutableLinkedListIterator::peekNext () const

Returns a reference to the next item, without moving the iterator.

Calling this function on an iterator located at the back of the container leads to undefined results.

See also hasNext(), next(), and peekPrevious().

T & QMutableLinkedListIterator::peekPrevious () const

Returns a reference to the previous item, without moving the iterator.

Calling this function on an iterator located at the front of the container leads to undefined results.

See also hasPrevious(), previous(), and peekNext().

T & QMutableLinkedListIterator::previous ()

Returns a reference to the previous item and moves the iterator back by one position.

Calling this function on an iterator located at the front of the container leads to undefined results.

See also hasPrevious(), peekPrevious(), and next().

void QMutableLinkedListIterator::remove ()

Removes the last item that was jumped over using one of the traversal functions (next(), previous(), findNext(), findPrevious()).

Example:

 QMutableLinkedListIterator<int> i(list);
 while (i.hasNext()) {
     int val = i.next();
     if (val < -32768 || val > 32767)
         i.remove();
 }

See also insert() and setValue().

void QMutableLinkedListIterator::setValue ( const T & value ) const

Replaces the value of the last item that was jumped over using one of the traversal functions with value.

The traversal functions are next(), previous(), findNext(), and findPrevious().

Example:

 QMutableLinkedListIterator<double> i(list);
 while (i.hasNext()) {
     double val = i.next();
     i.setValue(sqrt(val));
 }

See also value(), remove(), and insert().

void QMutableLinkedListIterator::toBack ()

Moves the iterator to the back of the container (after the last item).

See also toFront() and previous().

void QMutableLinkedListIterator::toFront ()

Moves the iterator to the front of the container (before the first item).

See also toBack() and next().

const T & QMutableLinkedListIterator::value () const

Returns the value of the last item that was jumped over using one of the traversal functions (next(), previous(), findNext(), findPrevious()).

After a call to next() or findNext(), value() is equivalent to peekPrevious(). After a call to previous() or findPrevious(), value() is equivalent to peekNext().

See also setValue().

T & QMutableLinkedListIterator::value ()

This is an overloaded function.

Returns a non-const reference to the value of the last item that was jumped over using one of the traversal functions.

QMutableLinkedListIterator & QMutableLinkedListIterator::operator= ( QLinkedList<T> & list )

Makes the iterator operate on list. The iterator is set to be at the front of the list (before the first item).

See also toFront() and toBack().