Re: [Boost-bugs] [Boost C++ Libraries] #5823: nextafter doesn't work correctly with non-finite values -- even in C99/TR1 mode

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5823: nextafter doesn't work correctly with non-finite values -- even in C99/TR1 mode
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-10-10 08:52:42

#5823: nextafter doesn't work correctly with non-finite values -- even in C99/TR1
mode
-------------------------------+--------------------------------------------
  Reporter:  mgaunard          |       Owner:  johnmaddock
      Type:  Bugs              |      Status:  closed     
 Milestone:  To Be Determined  |   Component:  math       
   Version:  Boost 1.47.0      |    Severity:  Problem    
Resolution:  wontfix           |    Keywords:             
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Changes (by johnmaddock):

  * status:  new => closed
  * resolution:  => wontfix

Comment:

 The current implementation deliberately treats an infinite argument as a
 domain error and raises an exception in C++ mode, or returns NaN in TR1
 mode.

 It would be easy enough to change this, but IMO it's questionable what the
 return value should be in this case - I'm not convinced that converting an
 infinite value to a finite one is the "right" answer - arguably the result
 could/should still be infinite.

 So unless we can get a definitive answer from the C99 folks as to what the
 correct answer should be, I'm inclined to leave it as it is for now.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5823#comment:2>
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