Thanks for the appreciation ;-)
I intent to introduce C and C++ into the model as well, but it's not my priority. In fact, one alternative would be to start off from Qt Creator's C++ parser, but since it has certain limitations with templates as well, it's questionable how much it would improve on Code::Block's, at least during initial stage. If my project gets some traction I'd of course invest on it (I'm currently developing it on my spare time).
I didn't know you already had Python support, that's good. Nevertheless, I'm open to integrate other languages too. For instance, I'm studying Rust right now. Therefore, if you believe there's a front in which we can collaborate, please let me know.
I never checked Code::Block's source, but I'm curious about your general code completion framework. I guess I should take a look into it.
Regarding Qt Creator's clang-based code model, it's there but I don't how much people are working on it. I participated in the early development phase when we were experimenting things around. Back then, the primary issue we had was performance. Qt Creator's native C++ parser is slick because it does some "tricks" that are not standard conformant but work pretty well in most code bases. Clang, on the other hand, is a real compiler so this was kind of expected.