The QJsonObject::const_iterator class provides an STL-style const iterator for QJsonObject. More...
This class was introduced in Qt 5.0.
| iterator_category |
| const_iterator(const iterator &other) | |
| const_iterator() | |
| QString | key() const |
| QJsonValueRef | value() const |
| bool | operator!=(const const_iterator &other) const |
| bool | operator!=(const iterator &other) const |
| const QJsonValueRef | operator*() const |
| const_iterator | operator+(qsizetype j) const |
| const_iterator & | operator++() |
| const_iterator | operator++(int) |
| const_iterator & | operator+=(qsizetype j) |
| const_iterator | operator-(qsizetype j) const |
| qsizetype | operator-(const_iterator other) const |
| const_iterator & | operator--() |
| const_iterator | operator--(int) |
| const_iterator & | operator-=(qsizetype j) |
| const QJsonValueRef * | operator->() const |
| bool | operator<(const const_iterator &other) const |
| bool | operator<=(const const_iterator &other) const |
| bool | operator==(const const_iterator &other) const |
| bool | operator==(const iterator &other) const |
| bool | operator>(const const_iterator &other) const |
| bool | operator>=(const const_iterator &other) const |
| const QJsonValueRef | operator[](qsizetype j) |
QJsonObject::const_iterator allows you to iterate over a QJsonObject. If you want to modify the QJsonObject as you iterate over it, you must use QJsonObject::iterator instead. It is generally good practice to use QJsonObject::const_iterator on a non-const QJsonObject as well, unless you need to change the QJsonObject through the iterator. Const iterators are slightly faster and improve code readability.
The default QJsonObject::const_iterator constructor creates an uninitialized iterator. You must initialize it using a QJsonObject function like QJsonObject::constBegin(), QJsonObject::constEnd(), or QJsonObject::find() before you can start iterating.
Multiple iterators can be used on the same object. Existing iterators will however become dangling if the object gets modified.
See also QJsonObject::iterator, JSON Support in Qt, and JSON Save Game Example.
A synonym for std::random_access_iterator_tag indicating this iterator is a random-access iterator.
Note: In Qt versions before 5.6, this was set by mistake to std::bidirectional_iterator_tag.
Returns true if other points to a different item than this iterator; otherwise returns false.
See also operator==().
Returns true if other points to the same item as this iterator; otherwise returns false.
See also operator!=().
Constructs a copy of other.
Constructs an uninitialized iterator.
Functions like key(), value(), and operator++() must not be called on an uninitialized iterator. Use operator=() to assign a value to it before using it.
See also QJsonObject::constBegin() and QJsonObject::constEnd().
Returns the current item's key.
See also value().
Returns the current item's value.
See also key() and operator*().
Returns the current item's value.
Same as value().
See also key().
Returns an iterator to the item at j positions forward from this iterator. If j is negative, the iterator goes backward.
This operation can be slow for large j values.
See also operator-().
The prefix ++ operator, ++i, advances the iterator to the next item in the object and returns an iterator to the new current item.
Calling this function on QJsonObject::end() leads to undefined results.
See also operator--().
This is an overloaded function.
The postfix ++ operator, i++, advances the iterator to the next item in the object and returns an iterator to the previously current item.
Advances the iterator by j items. If j is negative, the iterator goes backward.
This operation can be slow for large j values.
See also operator-=() and operator+().
Returns an iterator to the item at j positions backward from this iterator. If j is negative, the iterator goes forward.
This operation can be slow for large j values.
See also operator+().
Returns the number of items between the item pointed to by other and the item pointed to by this iterator.
The prefix -- operator, --i, makes the preceding item current and returns an iterator pointing to the new current item.
Calling this function on QJsonObject::begin() leads to undefined results.
See also operator++().
This is an overloaded function.
The postfix -- operator, i--, makes the preceding item current and returns an iterator pointing to the previously current item.
Makes the iterator go back by j items. If j is negative, the iterator goes forward.
This operation can be slow for large j values.
See also operator+=() and operator-().
Returns a pointer to the current item.
Returns true if the item pointed to by this iterator is less than the item pointed to by the other iterator.
Returns true if the item pointed to by this iterator is less than or equal to the item pointed to by the other iterator.
Returns true if the item pointed to by this iterator is greater than the item pointed to by the other iterator.
Returns true if the item pointed to by this iterator is greater than or equal to the item pointed to by the other iterator.
Returns the item at offset j from the item pointed to by this iterator (the item at position *this + j).
This function is provided to make QJsonObject iterators behave like C++ pointers.
See also operator+().
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Licensed under the GNU Free Documentation License, Version 1.3.
https://doc.qt.io/qt-6.2/qjsonobject-const-iterator.html