Hi @shirl I think that what you need is a clang-format, not clang-tidy. clang-tidy is a linter, it doesn't format code. Useful documentation on clang-format: https://clang.llvm.org/docs/ClangFormat.html Here https://www.clangformat.com/ you can try different styles and see how they affect your code. And this part: avoid more than 60 lines in a block no more than 60 characters on a comment line avoid more than 500 to 1000 lines per file prefer break, continue, and return to deeper nesting How do you want to enforce it? Line breaks, whitespace can be added, but what do you want to do here?

I wouldn't know about Google's C++ style guide, but Qt certainly have their own guidelines for Qt itself: https://wiki.qt.io/Qt_Coding_Style There is a _clang-format file used by clang-format in the supermodule, which should be in line with the standard: https://github.com/qt/qt5/blob/dev/_clang-format You're completely free to choose your own style for your projects using Qt, though.