Re: lua_number2int

[David Given <dg@...>]

Roberto Ierusalimschy wrote:
[...]
> But it seems that casting (double)-1 to an unsigned int will result in
> daemons flying out of our noses.

From my understanding of the specification, that's correct. It will.

It just so happens that on all platforms and all compilers that I know of it
produces the same result as (int)(unsigned int)(double)-1, but that's
coincidental.

(You know, it would be rather informative some time to put together a C
compiler which actually *checked* for all these undefined behaviour cases. I
suspect we might learn something...)

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