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: 2013-02-13 00:19:54

#8011: iterator_range::size() is not SFINAE-friendly
---------------------------------------------------------+------------------
  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:            
---------------------------------------------------------+------------------

Comment (by jwakely.boost@…):

 I use `boost::zip_iterator`so to construct an end iterator that is
 reachable from  {r1.begin(), r2.begin(), ...}  it needs to be
 {r1.begin()+N, r2.begin()+N, ...} (where N is the size of the smallest
 range) not {r1.end(), r2.end(), ...} because `operator==` for
 `zip_iterator` is only true if all members of the tuple are equal.

 https://gitorious.org/redistd/redistd/blobs/master/include/redi/zip.h

 Since I switched from using the size() member it needs fixing to avoid
 calling both `std::distance()` and `std::advance()`, but the point of this
 ticket is that I'd prefer to use size() when possible

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8011#comment:4>
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