[lifthrasiir]

_Bool etc. came with convenience macros defined from <stdbool.h> and so on, but _Generic never did, suggesting that the underscored version was meant to stay forever that way. (Otherwise it should have been named as something like _Generic_switch and later renamed to generic_switch...) Maybe _Type and _Var are similarily intended.

[sigsev_251]

I mean, _Generic is usually hidden behind a macro anyways, so it doesn't really show up in you text file all that much.