I ran a subset of the available checks. The full list of possible checks can be found at https://clang.llvm.org/extra/clang-tidy/checks/list.html. Each check was run independently and only those that resulted in changes are listed as a separate commit (that can be easily removed if deemed too intrusive).

Please go through and see what you think.

Matthias Wittgen, you've talked about doing this in the past, and you're not the first one. I'm not sure this ticket is useful (I'm sure the branch isn't mergeable, as it was created ages ago and a new clang-tidy run would be quite different), but there maybe useful information here, and if you don't have your own ticket to do this you're welcome to use this one.

Cloned into new task to avoid messing with already existing branches for this ticket in github