[Boost-bugs] [Boost C++ Libraries] #1528: g++ 4.3.0 reports error because of redeclaration of next

Subject: [Boost-bugs] [Boost C++ Libraries] #1528: g++ 4.3.0 reports error because of redeclaration of next
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2007-12-19 15:28:34

#1528: g++ 4.3.0 reports error because of redeclaration of next
-------------------------------------+--------------------------------------
 Reporter:  jensseidel_at_[hidden]  |       Owner:  agurtovoy
     Type:  Bugs                     |      Status:  new      
Milestone:  Boost 1.35.0             |   Component:  mpl      
  Version:  Boost Development Trunk  |    Severity:  Problem  
 Keywords:                           |  
-------------------------------------+--------------------------------------
 Compiling parts of Fusion shows the following bug in MPL with a recent g++
 4.3 snapshot:

 In file included from
 /home/jens/trunk/boost/fusion/view/zip_view/detail/equal_to_impl.hpp:16,
 from /home/jens/trunk/boost/fusion/view/zip_view/zip_view_iterator.hpp:19,
 from /home/jens/trunk/boost/fusion/view/zip_view.hpp:12,
 from /home/jens/trunk/boost/fusion/include/zip_view.hpp:10,
 from /tmp/testDTdYXq.cpp:1:
 /home/jens/trunk/boost/mpl/zip_view.hpp:42: error: declaration of 'typedef
 struct boost::mpl::zip_iterator<typename
 boost::mpl::transform1<IteratorSeq, boost::mpl::next<mpl_::arg<1> >,
 mpl_::na>::type> boost::mpl::zip_iterator<IteratorSeq>::next'
 /home/jens/trunk/boost/mpl/next_prior.hpp:30: error: changes meaning of
 'next' from 'struct boost::mpl::next<mpl_::arg<1> >'
 /home/jens/trunk/boost/mpl/zip_view.hpp:56: error: declaration of 'typedef
 struct boost::mpl::zip_iterator<typename boost::mpl::transform1<Sequences,
 boost::mpl::begin<mpl_::arg<1> >, mpl_::na>::type>
 boost::mpl::zip_view<Sequences>::begin'
 /home/jens/trunk/boost/mpl/begin_end.hpp:32: error: changes meaning of
 'begin' from 'struct boost::mpl::begin<mpl_::arg<1> >'
 /home/jens/trunk/boost/mpl/zip_view.hpp:57: error: declaration of 'typedef
 struct boost::mpl::zip_iterator<typename boost::mpl::transform1<Sequences,
 boost::mpl::end<mpl_::arg<1> >, mpl_::na>::type>
 boost::mpl::zip_view<Sequences>::end'
 /home/jens/trunk/boost/mpl/begin_end.hpp:44: error: changes meaning of
 'end' from 'struct boost::mpl::end<mpl_::arg<1> >'

 I think the problem is that in boost::mpl::zip_iterator
 boost::mpl::next is visible and does not allow to define
 a new next (even if relative to zip_iterator).

 See http://en.opensuse.org/GCC_4.3_Transition and
 http://gcc.gnu.org/ml/gcc/2007-09/msg00480.html for more details.

 Just renaming one of the "next" fixes this problem but introduces of
 course many more.

 PS: Please fix the typo "shorcuts" in one of the MPL header file.

-- 
Ticket URL: <http://svn.boost.org/trac/boost/ticket/1528>
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