Re: [Boost-bugs] [Boost C++ Libraries] #4028: fusion::begin and fusion::end lead to problems with ADL-based begin and end functions for ranges

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4028: fusion::begin and fusion::end lead to problems with ADL-based begin and end functions for ranges
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-12-21 01:16:53

#4028: fusion::begin and fusion::end lead to problems with ADL-based begin and end
functions for ranges
-------------------------------+--------------------------------------------
  Reporter:  mgaunard          |       Owner:  djowel             
      Type:  Bugs              |      Status:  reopened           
 Milestone:  To Be Determined  |   Component:  fusion             
   Version:  Boost 1.42.0      |    Severity:  Problem            
Resolution:                    |    Keywords:  ADL range begin end
-------------------------------+--------------------------------------------

Comment (by anonymous):

 I believe the only solution we have is to use an ADL barrier. E.g.

 #include <boost/array.hpp>
 #include <boost/fusion/container/vector.hpp>
 #include <boost/fusion/sequence/intrinsic/end.hpp>
 #include <boost/fusion/adapted/array.hpp>
 #include <boost/range.hpp>

 namespace boost { namespace fusion {

     namespace adl_barrier
     {
         struct xx {};
     }
     using ::boost::fusion::adl_barrier::xx;
 }}

 int main()
 {
     boost::array<boost::fusion::xx, 42> foo;
     begin(foo);
 }

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4028#comment:9>
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