There are lots of reasons for using C++'s bit field feature. Perhaps you need a more compact way to represent your data structures, maybe you need to use them to interact with hardware, or if you're writing an emulator, maybe you want to use them to efficiently represent the hardware that you're emulating. The list goes on...
Read More...Qt has a wonderful way of dealing with memory management. The core idea is simple. Most objects have a parent, and when the parent gets destroyed, it will first destroy all its children. Using this technique, you can often write your Qt applications with little to no concern for memory management. Often, you literally don't have to have a single delete in your entire application. That's pretty sweet!
In addition, since Qt 4.5 QSharedPointer was introduced, which is very similar in concept to boost::shared_ptr (and thus std::tr1::shared_ptr). I have long been a huge fan of the idea of smart pointers. They solve the need to worry about memory management for almost all usual cases. Unfortunately, when you combine these two concepts, sometimes you can go awry. I was surprised by this one, so I figured I'd share my findings :-).
Qt is a fantastically designed library. However, every now and then I think of something that I wish they offered that they don't. It's almost always something small and easily worked around, but it would be nice if it were just there. This time around, that feature is the ability to connect a signal to a function that is not a member of a class/struct. Specifically, I think it would be really cool if I could connect it to a c++0x lambda! Especially now that the [ISO C++ committee approved the C++0x final draft][1].
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