Re: [Boost-users] [TR1 Review] TR1 Formal Review Beginning

From: Howard Hinnant (hinnant_at_[hidden])
Date: 2005-09-30 11:34:08

On Sep 30, 2005, at 12:18 PM, John Maddock wrote:

> I'm aware of those nasties, but <cmath> is *not* part of the current
> submission, well that's my excuse anyway.  Basically hypot/log1p/expm1 
> are
> some internals I needed and it seems a shame not to expose them in
> Boost.Math.

<nod> Fair enough.

>> Also do we want to support infinities and nans?
>>
>> assert(hypot(INFINITY, sqrt(-1.)) == INFINITY);
>
> Hmm, what does C99 say about this, I can see anything obvious at first
> glance?  Your suggestion matches what the complex number functions are
> required to do however, so it's probably in there somewhere, I just 
> can't
> see it at present.

Annex F is the place to look.  It is optional.  You state your 
intention to conform to it with:

#define __STDC_IEC_559_ _

Lots of good stuff in there.  hypot is convered in F.9.4.3.

-Howard