Unfortunately __typeof__ is non-standard. Despite its usefulness it always gets left out of the standard (and with weird excuses, I think last time it was lack of implementations - despite the fact that eg. both GCC and LLVM implement it).
Interestingly, C11 defines _Generic selection, a kind of a switch for types, but its usefulness is hindered by the fact that it cannot be used in conjunction with sizeof.
Interestingly, C11 defines _Generic selection, a kind of a switch for types, but its usefulness is hindered by the fact that it cannot be used in conjunction with sizeof.