[std-interval] Interval comparison operators

Hervé Brönnimann hbr at poly.edu
Sat Jun 3 12:37:39 PDT 2006



On Jun 1, 2006, at 3:25 AM, Alan Eliasen wrote:
> I know of no portable functions other than std::isnan()
> (defined in cmath) which simply detects if it's a NaN or not, so you
> shouldn't even expect to differentiate between these two.

FWIW, std::numeric_limits<T> has members has_quiet_NaN and  
has_signaling_NaN along with quiet_NaN and signaling_NaN.  What you  
can expect is to differentiate between them IF your platform supports  
them (and the numeric_limits given by your system is accurate for the  
platform, as it should).
--
Hervé Brönnimann
CIS, Polytechnic University
hbr at poly.edu


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