The QSequentialIterable::const_iterator allows iteration over a container in a QVariant. More...
Header: | #include <const_iterator> |
qmake: | QT += core |
Since: | Qt 5.2 |
const_iterator(const const_iterator &other) | |
~const_iterator() | |
bool | operator!=(const const_iterator &other) const |
const QVariant | operator*() const |
const_iterator | operator+(int j) const |
const_iterator & | operator++() |
const_iterator | operator++(int) |
const_iterator & | operator+=(int j) |
const_iterator | operator-(int j) const |
const_iterator & | operator--() |
const_iterator | operator--(int) |
const_iterator & | operator-=(int j) |
const_iterator & | operator=(const const_iterator &other) |
bool | operator==(const const_iterator &other) const |
The QSequentialIterable::const_iterator allows iteration over a container in a QVariant.
A QSequentialIterable::const_iterator can only be created by a QSequentialIterable instance, and can be used in a way similar to other stl-style iterators.
QList<int> intList = {7, 11, 42}; QVariant variant = QVariant::fromValue(intList); if (variant.canConvert<QVariantList>()) { QSequentialIterable iterable = variant.value<QSequentialIterable>(); // Can use foreach: foreach (const QVariant &v, iterable) { qDebug() << v; } // Can use C++11 range-for: for (const QVariant &v : iterable) { qDebug() << v; } // Can use iterators: QSequentialIterable::const_iterator it = iterable.begin(); const QSequentialIterable::const_iterator end = iterable.end(); for ( ; it != end; ++it) { qDebug() << *it; } }
See also QSequentialIterable.
Creates a copy of other.
Destroys the QSequentialIterable::const_iterator.
Returns true
if other points to a different item than this iterator; otherwise returns false
.
See also operator==().
Returns the current item, converted to a QVariant.
Returns an iterator to the item at j positions forward from this iterator.
See also operator-() and operator+=().
The prefix ++ operator (++it
) advances the iterator to the next item in the container and returns an iterator to the new current item.
Calling this function on QSequentialIterable::end() leads to undefined results.
See also operator--().
This is an overloaded function.
The postfix ++ operator (it++
) advances the iterator to the next item in the container and returns an iterator to the previously current item.
Advances the iterator by j items.
See also operator-=() and operator+().
Returns an iterator to the item at j positions backward from this iterator.
If the container in the QVariant does not support bi-directional iteration, calling this function leads to undefined results.
See also operator+(), operator-=(), and canReverseIterate().
The prefix -- operator (--it
) makes the preceding item current and returns an iterator to the new current item.
Calling this function on QSequentialIterable::begin() leads to undefined results.
If the container in the QVariant does not support bi-directional iteration, calling this function leads to undefined results.
See also operator++() and canReverseIterate().
This is an overloaded function.
The postfix -- operator (it--
) makes the preceding item current and returns an iterator to the previously current item.
If the container in the QVariant does not support bi-directional iteration, calling this function leads to undefined results.
See also canReverseIterate().
Makes the iterator go back by j items.
If the container in the QVariant does not support bi-directional iteration, calling this function leads to undefined results.
See also operator+=(), operator-(), and canReverseIterate().
Assigns other to this.
Returns true
if other points to the same item as this iterator; otherwise returns false
.
See also operator!=().
© The Qt Company Ltd
Licensed under the GNU Free Documentation License, Version 1.3.
https://doc.qt.io/qt-5/qsequentialiterable-const-iterator.html