[Boost-bugs] [Boost C++ Libraries] #1860: zip_iterator::value_type should not be reference

Subject: [Boost-bugs] [Boost C++ Libraries] #1860: zip_iterator::value_type should not be reference
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2008-04-24 18:39:19

#1860: zip_iterator::value_type should not be reference
--------------------------+-------------------------------------------------
 Reporter:  anonymous     |       Owner:  dave    
     Type:  Bugs          |      Status:  new     
Milestone:  Boost 1.36.0  |   Component:  iterator
  Version:  Boost 1.35.0  |    Severity:  Problem 
 Keywords:                |  
--------------------------+-------------------------------------------------
 hi,
 defining zip_iterator::value_type in the boost.iterator library to be
 the same as the reference type breaks some mutating algorithms on
 zip_iterators. for example sort:
 {{{
 template<class Array1,class Array2>
 void array_multisort(Array1& array1, Array2& array2)
 {
   using namespace boost;
   std::sort(make_zip_iterator(make_tuple(array1.begin(), array2.begin())),
             make_zip_iterator(make_tuple(array1.end(), array2.end())));
 }
 }}}
 won't work as expected. Patching zip_iterator to provide a more natural
 value_type makes the above code work as intended. The patch is attached
 to this message.

 mfg thomas

-- 
Ticket URL: <http://svn.boost.org/trac/boost/ticket/1860>
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