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c++qtboostqtcoreqsharedpointer

QSharedPointer from a raw pointer

I currently have something like this:

QSharedPointer<t> Qsharedfoo;

Now I have a raw pointer to foo as well called rawfoo. How can I make foo point own the raw pointer and start pointing to it. I know in boost with shared pointers we could use boost::make_shared how do we do it with QSharedPointer ?

I want to do something like this:

Qsharedfoo = rawfoo
Solution

  • How can I make foo point own the raw pointer and start pointing to it. I know in boost with shared pointers we could use boost::make_shared how do we do it with QSharedPointer ?

    You cannot, unfortunately.

    • You will always need to go through the constructor unlike make_shared.

    • It is not necessarily exception safe.

    In summary, you would need to go through the constructor and operator= as follows:

    Qsharedfoo = QSharedPointer<T>(rawfoo); // operator=() overload

    or if you already have a reference to a pointer, then use the reset() method as follows:

    Qsharedfoo.reset(rawFoo);

    But as mentioned in the beginning, these are not equal operations to what you are looking for.