Re: [Boost-bugs] [Boost C++ Libraries] #6131: #define foreach BOOST_FOREACH causes weird compile error in certain circumstances with boost 1.48

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #6131: #define foreach BOOST_FOREACH causes weird compile error in certain circumstances with boost 1.48
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-06-05 22:07:13

#6131: #define foreach BOOST_FOREACH causes weird compile error in certain
circumstances with boost 1.48
-------------------------------+--------------------------------------------
  Reporter:  loonycyborg       |       Owner:  eric_niebler
      Type:  Bugs              |      Status:  closed      
 Milestone:  To Be Determined  |   Component:  foreach     
   Version:  Boost 1.49.0      |    Severity:  Problem     
Resolution:  fixed             |    Keywords:              
-------------------------------+--------------------------------------------

Comment (by anonymous):

 In 1.49 under Visual Studio 2008, I am now getting this error whenever I
 DON'T include <boost/foreach.hpp> until AFTER I #define foreach
 BOOST_FOREACH:

 'boost::BOOST_FOREACH::is lightweight proxy' : class template has already
 been defined
     foreach_fwd.hpp(62) : see declaration of
 'boost::BOOST_FOREACH::is_lightweight_proxy'

 Simple test that fails:

 #define foreach BOOST_FOREACH
 #include <boost/foreach.hpp>

 It works fine in the other order, i.e., the include before the #define.
 This never used to be a problem.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6131#comment:9>
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