I think what you're describing almost exists for C++ in the form of libclang. Editors really prize uniformity and predictability, to give users a comfortable ex

I think what you're describing almost exists for C++ in the form of libclang. Editors really prize uniformity and predictability, to give users a comfortable experience, which is why I think libclang is so unwieldy if you try to integrate it into an editor fully—I tried with emacs once. So, despite all the massive effort put into clang, it gets incorporated piecemeal, one IDE feature at a time.