Octal, Hexadecimal or Binary Constant literals,

[thradams]

unsigned long long u[] = {18408377700990114895 , 0xff77b1fcbebcdc4f}; 

Octal, Hexadecimal or Binary Constant are wrong in cake because cake is using the rule for decimal that is different.

In decimal it is always signed type , but hex they can be unsigned if it fits.

[thradams]

in GCC mode must pass

#define TYPE(E, T) _Generic(typeof(E), T : 1, default: 0)

int main() {
  static_assert(TYPE(0x80000000, unsigned int));
  static_assert(TYPE(2147483648, long));
}

[thradams]

missing tests