[PATCH] clang-tidy checker that enforce proper parentheses in macros

[Alexander Kornienko]

In http://reviews.llvm.org/D9528#184221, @danielmarjamaki wrote:

> I have scanned 100 projects with this checker today and got 42637 warnings. When comparing with the previous results, fp warnings for type definitions have been removed but no tp were removed.


This sounds interesting, but it would be nice to know how many warnings were generated on the same code previously. Is there a large enough subset of the projects you analyzed previously (the "193 debian projects") and now?

> To clarify, warnings are often duplicated when a there is a dangerous macro in a header that is reused from many files. So there are not 42637 unique warnings.


That doesn't make the stats more useful as well. Clang-tidy deduplicates warnings on each run, but when multiple instances run, post-processing should be done externally. Maybe you could use some grep|sort|uniq-foo to count just the unique source locations? Having the output in the one line per warning form would also allow to choose a random subset easily (shuf|head -n100).

> I have looked at > 100 warnings throughout the results file and dont see false positives.


That also sounds good.

Can you fix the issues pointed out in earlier reviews as well?


http://reviews.llvm.org/D9528

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