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: 2013-02-11 23:48:46

#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 [ticket:8011 Jonathan Wakely <jwakely.boost@…>]:
 > iterator_range<I>::size() is always defined, but fails a static
 assertion if I is not a random access iterator.  This means it's not
 possible to use SFINAE To detect whether r.size() is valid.

 What is a use case to using SFINAE to detect whether r.size() is valid?
 (I'm not questioning that there is one, I'm just curious.)

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8011#comment:1>
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