Re: [Boost-bugs] [Boost C++ Libraries] #8011: iterator_range::size() is not SFINAE-friendly

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #8011: iterator_range::size() is not SFINAE-friendly
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-02-18 10:15:03

#8011: iterator_range::size() is not SFINAE-friendly
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  Reporter:  Jonathan Wakely <jwakely.boost@…>           |       Owner:  neilgroves
      Type:  Feature Requests                            |      Status:  new       
 Milestone:  To Be Determined                            |   Component:  range     
   Version:  Boost 1.52.0                                |    Severity:  Problem   
Resolution:                                              |    Keywords:            
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Comment (by nathanridge):

 Replying to [comment:11 jwakely.boost@…]:
 > > So you can just always use std::distance.
 >
 > Solving the problem for RA iterators was never the issue, obviously
 std::distance works for them, but that's sub-optimal for non-RA iterators.
 If a container such as std::map, which has bidirectional iterators,
 provides an O(1) size() member then I want to use it. But I can't tell
 whether a range provides size() or not, because iterator_range provides it
 but it isn't usable.

 Ah, I see now. Thanks for clarifying!

 > > Feel free to weigh in.
 >
 > I'd rather not, the boost lists are an enormous time sink. The only
 reply is typical: offering advice without bothering to read the ticket you
 linked to, which provides the use case.

 I'm sorry to hear you have such a poor opinion of the boost lists. I am
 happy to make your case for you, now that I understand it.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8011#comment:12>
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