It seems like they&#x27;ve made the classic mistake with C++ parsers of reinventing the wheel. I have never used an IDE which is capable of correctly parsing all the C++ code I&#x27;ve used.<p>The notable exception is anything based on clang, which is usually flawless (as you would expect). If CLion had been based on clang then they would have saved themselves a lot of work and ended up with a better performing product. Presumably the reason they didn&#x27;t had something to do with licensing.