Re: [Boost-bugs] [Boost C++ Libraries] #5475: [Foreach] rvalue reference binding of temporary ranges

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5475: [Foreach] rvalue reference binding of temporary ranges
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-10-16 18:55:42

#5475: [Foreach] rvalue reference binding of temporary ranges
--------------------------------------+-------------------------------------
  Reporter:  mimomorin@…              |       Owner:  eric_niebler  
      Type:  Patches                  |      Status:  closed        
 Milestone:  To Be Determined         |   Component:  foreach       
   Version:  Boost Development Trunk  |    Severity:  Problem       
Resolution:  fixed                    |    Keywords:  foreach, C++0x
--------------------------------------+-------------------------------------

Comment (by Michel Morin <mimomorin@…>):

 Attached a patch that implements A (reverting to the C++03 BOOST_FOREACH
 on gcc-4.4).

 I've found that even with the simplest implementation of B
 {{{
 ...
 if (bool is_rng_defined) = false) {} else
 for (auto &&rng = (EXPR); !is_rng_defined; is_rng_defined = true)
 ...
 }}}
 we can make a regression due to the nasty `auto` bug in gcc-4.4.
 So we have only one choice: A.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5475#comment:27>
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