This is indeed a form supported by GNU C extension [1] (but `?:` is not a single token, so `? :` is permitted). [1] https://gcc.gnu.org/onlinedocs/gcc/Conditio

This is indeed a form supported by GNU C extension [1] (but `?:` is not a single token, so `? :` is permitted). [1] https://gcc.gnu.org/onlinedocs/gcc/Conditionals.html#Conditionals https://gcc.gnu.org/onlinedocs/gcc/Conditionals.html#Conditi...