Re: [Boost-bugs] [Boost C++ Libraries] #5931: numeric::interval equal comparison is strange

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5931: numeric::interval equal comparison is strange
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-09-23 17:46:56

#5931: numeric::interval equal comparison is strange
----------------------------------------------+-----------------------------
  Reporter:  Per Karlström <perk@…>           |       Owner:  bgubenko   
      Type:  Bugs                             |      Status:  closed     
 Milestone:  To Be Determined                 |   Component:  interval   
   Version:  Boost 1.47.0                     |    Severity:  Showstopper
Resolution:  invalid                          |    Keywords:             
----------------------------------------------+-----------------------------
Changes (by steven_watanabe):

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

Comment:

 The behavior is correct.  Think of interval as representing
 some number in the range [low, high] whose exact value is
 unknown.  Then (I1 == I2) returns true iff every value in I1
 is equal to every value in I2. This, of course, can only happen
 when both intervals contain a single element.  It returns
 false if I1 and I2 do not overlap at all.  In all other
 cases it throws an exception, because it's impossible
 to determine whether the values are equal.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5931#comment:1>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.