I am maintaining some SA checkers, which are only relevant to specific languages (C++), and crash when called on irrelevant sources (C).
Are there any best practices, or guidelines regarding the language assessment of the current translation unit?
I am aware that GTestChecker uses its register method to check LangOpts to only register in case the current TU is C++. I have also encountered sporadic LangOpts checks inside the checker callback methods. We could also query the build system to map TU-s to language categories, however, inside the clang framework, a more cognizant decision could be made.
I would like to have your suggestions on this matter.