- Qt 6.8
- Qt Core
- C++ Classes
- iterator
- Qt 6.8.3 Reference Documentation

# Obsolete Members for iterator

The following members of class iterator are deprecated. They are provided to keep old source code working. We strongly advise against using them in new code.

## Public Functions

`(deprecated in 6.2)` QMap<Key, T>::iterator & | operator+=(QMap<Key, T>::iterator::difference_type n)
`(deprecated in 6.2)` QMap<Key, T>::iterator & | operator-=(QMap<Key, T>::iterator::difference_type n)

## Related Non-Members

`(deprecated in 6.2)` QMap<Key, T>::iterator | operator+(QMap<Key, T>::iterator it, QMap<Key, T>::iterator::difference_type j)
`(deprecated in 6.2)` QMap<Key, T>::iterator | operator+(QMap<Key, T>::iterator::difference_type j, QMap<Key, T>::iterator it)
`(deprecated in 6.2)` QMap<Key, T>::iterator | operator-(QMap<Key, T>::iterator it, QMap<Key, T>::iterator::difference_type j)
`(deprecated in 6.2)` QMap<Key, T>::iterator | operator-(QMap<Key, T>::iterator::difference_type j, QMap<Key, T>::iterator it)

## Member Function Documentation

### `[deprecated in 6.2]` QMap<Key, T>::iterator &iterator::operator+=(QMap<Key, T>::iterator::difference_type n)

### `[deprecated in 6.2]` QMap<Key, T>::iterator &iterator::operator-=(QMap<Key, T>::iterator::difference_type n)

### `[deprecated in 6.2]` QMap<Key, T>::iterator operator+(QMap<Key, T>::iterator it, QMap<Key, T>::iterator::difference_type j)

### `[deprecated in 6.2]` QMap<Key, T>::iterator operator+(QMap<Key, T>::iterator::difference_type j, QMap<Key, T>::iterator it)

### `[deprecated in 6.2]` QMap<Key, T>::iterator operator-(QMap<Key, T>::iterator it, QMap<Key, T>::iterator::difference_type j)

### `[deprecated in 6.2]` QMap<Key, T>::iterator operator-(QMap<Key, T>::iterator::difference_type j, QMap<Key, T>::iterator it)

This function is deprecated since 6.2. We strongly advise against using it in new code.

Use `std::next`, `std::prev` or `std::advance` instead.

Moves an iterator by n positions. These operations can be expensive for large values of n; QMap iterators are not random access.