Clang v6.15 How to generate a compiler warning when break missing in switch/case fallthrough

-Wimplicit-fallthrough

https://stackoverflow.com/questions/8809154/how-to-make-gcc-clang-warn-about-missing-breaks-in-switch-statements

If intentional then:

switch (case_enum)
{
    case 1:
        [[clang::fallthrough]];
    case 2:
        break;
};

I naively thought it might be in document:
error_and_warnings_reference_guide_100074_6.18_00_en.pdf
https://developer.arm.com/documentation/100074/0618/?lang=en


No idea where this kind of stuff is documented. Maybe it is unofficial.

-Wimplicit-fallthrough

https://stackoverflow.com/questions/8809154/how-to-make-gcc-clang-warn-about-missing-breaks-in-switch-statements

If intentional then:

switch (case_enum)
{
    case 1:
        [[clang::fallthrough]];
    case 2:
        break;
};

I naively thought it might be in document:
error_and_warnings_reference_guide_100074_6.18_00_en.pdf
https://developer.arm.com/documentation/100074/0618/?lang=en


No idea where this kind of stuff is documented. Maybe it is unofficial.