Re: [Boost-bugs] [Boost C++ Libraries] #4874: multi_array compile errors using Visual C++ 2010 in debug mode

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4874: multi_array compile errors using Visual C++ 2010 in debug mode
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-01-11 02:52:38

#4874: multi_array compile errors using Visual C++ 2010 in debug mode
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  Reporter:  chrislu           |       Owner:  garcia                                          
      Type:  Bugs              |      Status:  new                                             
 Milestone:  To Be Determined  |   Component:  multi_array                                     
   Version:  Boost 1.47.0      |    Severity:  Showstopper                                     
Resolution:                    |    Keywords:  multi_array, Visual Studio 2010, Visual C++ 2010
-------------------------------+--------------------------------------------

Comment (by garcia):

 After looking into this some more, VC++ 2010 may be incorrect in its
 implementation of copy.  Due to some ambiguity in the C++ standard, it
 appears that any iterator that satisfies input_iterator or less can be an
 output_iterator without having an iterator_category that is convertible to
 output_iterator_tag.  It turns out that random_access_iterator_tag and
 friends are not convertible to output_iterator_tag, and the standard
 simply says that an iterator must have as its tag its most specific tag.
 output_iterator_tag gets used in the standard for things like
 back_insert_iterator, which are not even input_iterators.  Observe that
 the Boost Concept checking library does no iterator_category checking
 whatsoever for the OutputIterator Concept.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4874#comment:17>
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