Hi,

Il 15/10/25 16:30, Daniel Schürmann ha scritto:
Hello

My name is Daniel Schürmann and I am one of the core members in the Mixxx team. We develop the QT based FOSS DJ software Mixxx.

Since a couple of years we use a custom smart pointer to wrap pointers to QObjects, where the lifetime is managed by the QT object tree.

This is very useful for two reasons:
* In reviews it is clear that there is no explicit delete required, it eliminates the nowadays exceptional case of new() without delete(). * The pointer asserts that the object has actually a parent and is not leaked.

It has proven to be useful and disappointing that it is not available in all my QT projects. That's why I like to discuss to put it or anything similar into the QT source itself.

I have provided some more details in a QT bug here:
https://bugreports.qt.io/browse/QTBUG-141134 <https://bugreports.qt.io/ browse/QTBUG-141134>

Do you have an implementation that you could push as a WIP on gerrit? Or at least post it here as a skeleton?

(Note that we can't look at non-trivial implementations that aren't in the public domain, because we'd then taint our Qt contributions. Conversely, you shouldn't contribute under the CLA non-trivial implementations for which you don't have the rights...)

As far as I understand, parented_ptr would be a "smart" pointer that simply asserts that the managed object has a parent, and that's it? Does it do it just in the destructor or also in the other operations (dereferencing operators, .get(), etc.)?



Thank you,


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Giuseppe D'Angelo | [email protected] | Senior Software Engineer
KDAB (France) S.A.S., a KDAB Group company
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