Don't know why I got sniped into this on a friday night, but here's clang-tidy with only cppcoreguideline checks enabled, against every example: First example:

Don't know why I got sniped into this on a friday night, but here's clang-tidy with only cppcoreguideline checks enabled, against every example: First example: https://godbolt.org/z/898rorEqG https://godbolt.org/z/898rorEqG Second example: https://godbolt.org/z/K6aceesG9 https://godbolt.org/z/K6aceesG9 Third example: https://godbolt.org/z/KcbqzMzdK https://godbolt.org/z/KcbqzMzdK and I can't get the fourth example to compile without fixing the problems.