Consider the use of clang-tidy as a linter

[willdurand]

I gave clang-tidy a try locally and that is interesting. It caught a few minor mistakes and gives good warnings. I see it as a linter/static analysis tool to prevent some mistakes.

We'll adopt clang-format to enforce stylistic conventions. clang-tidy is not about style but errors that can be caught with static analysis so having both would make sense.

That's not high priority, though.