Re: [Boost-bugs] [Boost C++ Libraries] #7376: join_iterator.hpp compiler warning

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #7376: join_iterator.hpp compiler warning
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-06-10 20:22:33

#7376: join_iterator.hpp compiler warning
----------------------------------------------+------------------------
  Reporter:  Leonid Gershanovich <gleonid@…>  |      Owner:  neilgroves
      Type:  Bugs                             |     Status:  new
 Milestone:  To Be Determined                 |  Component:  range
   Version:  Boost 1.51.0                     |   Severity:  Problem
Resolution:                                   |   Keywords:
----------------------------------------------+------------------------

Comment (by anonymous):

 here is a sample code that produces compiler error:

 {{{
 #include "boost/range/join.hpp"

 struct A {};
 struct B: public A {} ;
 struct C: public A {};

 int main()
 {
   B b[10];
   C c[10];
   typedef ::boost::range_detail::join_iterator< const C*, const B* , const
 A&, const A& > join_iterator;
   join_iterator it(::boost::make_iterator_range(c),
                    ::boost::make_iterator_range(b),
                    ::boost::range_detail::join_iterator_begin_tag());
   *it;
 }
 }}}

 '''''error''':''


 ''boost/range/detail/join_iterator.hpp:74:
 error: no match for ternary 'operator?:' in '(selected != 0u) ? *(const
 B*)((const boost::range_detail::join_iterator_union<const C*, const B*,
 const A&>*)this)->boost::range_detail::join_iterator_union<const C*, const
 B*, const A&>::m_it2 : *(const C*)((const
 boost::range_detail::join_iterator_union<const C*, const B*, const
 A&>*)this)->boost::range_detail::join_iterator_union<const C*, const B*,
 const A&>::m_it1'''

 with patch suggested earlier this sample compiles without errors.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7376#comment:3>
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