Re: [boost] Optimized portable isnan, isfinite, fpclassify etc

From: Paul A Bristow (pbristow_at_[hidden])
Date: 2006-11-13 11:28:54

|  -----Original Message-----
|  From: boost-bounces_at_[hidden] 
|  [mailto:boost-bounces_at_[hidden]] On Behalf Of Johan Råde
|  Sent: 13 November 2006 14:37
|  To: boost_at_[hidden]
|  Subject: Re: [boost] Optimized portable isnan, isfinite, 
|  fpclassify etc
|  
|  Johan Råde wrote:
|  > Version 15 has been uploaded to the vault.
|  
|  John,
|  
|  There are some problems with version 15.
|  Don't bother to run any tests.
|  
|  I did some tests with VC6.5:
|  
|     qnan == qnan is false
|     snan == snan is true
|     qnan == inf  is false
|     qnan == -inf is false
|     snan == inf  is false
|     snan == -inf is true
|  
|  std::numeric_limits<T>::signaling_NaN() does return negative infinity.

This was a feature - I complained about it to PJP many years ago - after thinking I was terminally confused.  I believe is has been
corrected.

I suggest you/we stop trying to support this obselete version of the library.
It will only encourage people to keep on (ab-)using it ;-)

Paul

---
Paul A Bristow
Prizet Farmhouse, Kendal, Cumbria UK LA8 8AB
[phone] & SMS, Mobile [phone] & SMS
pbristow_at_[hidden]