- Qt 5.5
- Qt Core
- C++ Classes
- QWeakPointer
- Qt 5.5.1 Reference Documentation

# Obsolete Members for QWeakPointer

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

## Public Functions

`(obsolete)` | QWeakPointer(const QObject * obj)
`(obsolete)` QWeakPointer<T> | operator=(const QObject * obj)

## Member Function Documentation

### QWeakPointer::QWeakPointer(const QObject * obj)

Creates a QWeakPointer that holds a weak reference directly to the QObject obj. This constructor is only available if the template type `T` is QObject or derives from it (otherwise a compilation error will result).

You can use this constructor with any QObject, even if they were not created with QSharedPointer.

Note that QWeakPointers created this way on arbitrary QObjects usually cannot be promoted to QSharedPointer.

This function was introduced in Qt 4.6.

See also QSharedPointer and QPointer.

### QWeakPointer<T> QWeakPointer::operator=(const QObject * obj)

Makes this QWeakPointer hold a weak reference directly to the QObject obj. This function is only available if the template type `T` is QObject or derives from it.

This function was introduced in Qt 4.6.

See also QPointer.