Re: [boost] [serialization] facets for non-finite numbers

From: Andy Little (andy_at_[hidden])
Date: 2006-08-17 08:50:41

"Hubert Holin" <Hubert.Holin_at_[hidden]> wrote in message 
news:loom.20060817T140855-29_at_post.gmane.org...
> Johan RÃ¥de <rade <at> maths.lth.se> writes:
>
>>         Output is consistent with C99. (In particular, negative NaN is
>> written as "-nan".
>
> Paris (U.E.), le 17/08/2006
>
> Bonjour
>
> *Negative* Not-A-Number? What is such a beast, and what should
> it be used for?

It suggests to me a saturation in the negative direction, IOW a number less 
than -std::numerics<T>::max().

An example  use might be when you have an error integrator in a positional servo 
system, but I don't know if that is the effect here.

regards
Andy Little