Customising clang tidy to modernise your legacy C++ code
summary
Custom clang‑tidy checks convert legacy printf wrappers to fmt::printf then fmt::print and prepare for C++23 std::print, changing about 7,500 lines across ~440 files. Work includes a modernize-use-std-print converter, tests (~1,500 lines of lit tests), handling format quirks (width/precision, integer/sign casts), fixing a valgrind-only crash with git bisect, and landing changes upstream so the checks run as part of clang‑tidy and automate safe bulk rewrites.
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chapters (9)
- 0:00Modernizing legacy C++
- 10:58What is Clang Tidy
- 15:11Extending Clang Tidy
- 21:52Testing custom checks
- 27:43printf to C++20 format
- 35:28Other printf-like functions
- 39:32Limitations and future
- 41:20Contributing to Clang Tidy
- 43:28Q&A
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