Re: [Boost-users] isinf & Boost

From: John Maddock (john_at_[hidden])
Date: 2008-01-27 07:29:30

Pete Bartlett wrote:
> I believe the Math Toolkit will be in Boost 1.35

Correct.

> I believe Johan's implementation is even more portable and robust than
> John's, but perhaps less far through the review process:

Well, I'm biased :-)  But I'd characterise it like this: the version that 
will be in Boost-1.35 uses only portable C++ code, and will forward to the 
platforms native version if there is one.  It's also been tested on all the 
platforms we regression test on, and the only failure I know of turned out 
to be a bug in numeric_limits (confirmed by IBM).  On the other hand, 
Johan's implementation peeks at the bits of the value to determine it's 
type, which is *much* faster for native floating point types, but *maybe* 
less portable for some platforms, and doesn't scale to user defined floating 
point types.  Hopefully we'll end up with a combination of the best bits of 
the two versions in the end - and Johan's code review is coming up at the 
end of Feb if you're interested BTW.

HTH, John.