I don't see anything w.r.t. objc_msgSend() that obviously prevents it from being written in C, as opposed to objc_msg_lookup(). I mean, worst case scenario, co

I don't see anything w.r.t. objc_msgSend() that obviously prevents it from being written in C, as opposed to objc_msg_lookup(). I mean, worst case scenario, could it not just be: id objc_msgSend(id object, id selector, ...) { IMP tmp = objc_msg_lookup(object, selector); return tmp(object, selector, ...); } (forgive me for any mistyping here, as I'm not an Obj-C programmer, and for the varargs shorthand, to keep things simple)? Especially given that GCC supports some extensions to C that could reduce the overhead a bit (tail-recursion elimination, for example), I don't see why such a function couldn't be implementable in (GCC) C. Would you be willing to enlighten me?