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: 2010-12-20 15:34:09

#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
-------------------------------+--------------------------------------------
Changes (by anonymous):

  * milestone:  Boost 1.43.0 => To Be Determined

Comment:

 What can we do?

 I am not in favour of renaming fusion::begin/fusion::end - that would
 break a lot of code.
 We could remove the code to adapt arrays, or refactor it to a new facility
 that would adapt arrays by name (just like the named
 BOOST_FUSION_ADAPT_STRUCT_NAMED) - but this would break a lot of code as
 well. This does not solve the underlying problem of ambiguity either.

 I suggest adding a note in the documentation that points out this issue
 and proposes to explicitly namespace-qualify calls to
 fusion::begin/fusion::end in generic user code.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4028#comment:7>
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