Re: Specially crafted binary chunks can cause Lua to crash

["Alex Davies" <alex.mania@...>]

----- Original Message ----- 
From: "Ralph Hempel"

> Hopefully your compiler won't optimize that out, and it's not
> actually atomic in the sense that it's thread safe :-)
>
> Does the more verbose but clear (i ? true : false) generate better
> or worse code in terms of speed or size?
>
> Ralph

No compiler should optimize that out for the very reason that it serves a 
purpose. It should be faster then the ? : case, as few compilers will output 
branching code for !! where as many for the ? : case. Still simpler to read, 
and already present in the Lua core is:

(i != 0) // casts i to a 1 or a 0

Which would likely produce code equal to or better than the other two 
methods on all compilers.

- Alex