Re: Specially crafted binary chunks can cause Lua to crash

[Ralph Hempel <rhempel@...>]

David Given wrote:
> Luiz Henrique de Figueiredo wrote:
> > > And we'll probably fix this
> >
> > Here is the fix:
>
> I find myself using something I've dubbed the 'normalise' operator quite 
> a lot in C and C++ --- !!.
>
> bool convert_to_bool(int i)
> {
>     return !!i; // equivalent to (i ? true : false)
> }
>
> Yes, I know it's just two boolean nots one after the other, but it's 
> sufficiently useful and IMO sufficiently atomic that it's worth thinking 
> of as a primitive operation.

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