Smart Pointer Design

[lexfridman]

I've looked around on this forum and the web in general and have not found a clear discussion of using smart pointers with Qt objects. I am surprised to see most Qt examples using standard pointers. Does Qt perform some garbage collection?

Example:

QWidget * foo;
foo = new QWidget();
foo = new QWidget();

QWidget * foo;
foo = new QWidget();
foo = new QWidget();

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Will the first object float around in memory or be cleaned up?

If it's a leak, should I instead use something like Boost's shared_ptr:

shared_ptr<QWidget> foo;
foo = shared_ptr<QWidget>(new QWidget());
foo = shared_ptr<QWidget>(new QWidget());

shared_ptr<QWidget> foo;
foo = shared_ptr<QWidget>(new QWidget());
foo = shared_ptr<QWidget>(new QWidget());

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I apologize if this question is ignorant of the underlying Qt design and/or has been answered thoroughly elsewhere on the forum.