[Boost-bugs] [Boost C++ Libraries] #7663: warning C4913: user defined binary operator ', ' exists but no overload could convert all operands, default built-in binary operator ', ' used

Subject: [Boost-bugs] [Boost C++ Libraries] #7663: warning C4913: user defined binary operator ', ' exists but no overload could convert all operands, default built-in binary operator ', ' used
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-11-08 12:50:36

#7663: warning C4913: user defined binary operator ','  exists but no overload
could convert all operands, default built-in binary  operator ',' used
-------------------------------------+--------------------------------------
 Reporter:  jeffrey.flinn@…          |       Owner:  no-maintainer
     Type:  Bugs                     |      Status:  new          
Milestone:  To Be Determined         |   Component:  utility      
  Version:  Boost 1.52.0             |    Severity:  Cosmetic     
 Keywords:                           |  
-------------------------------------+--------------------------------------
 Gennadiy reports in trunk:

 boost/thread/future.hpp(378) : warning C4913: user defined binary operator
 ','
 exists but no overload could convert all operands, default built-in binary
 operator ',' used

 I get with VC2012 and boost_1_52_0:

 boost_1_52_0\boost/thread/future.hpp(293): warning C4913: user defined
 binary operator ',' exists but no overload could convert all operands,
 default built-in binary operator ',' used

 Nigel Pattinson reports a similar issue with VC2008 and unspecified boost
 version. He finds that:

 "The comma
 operator in question is the one in boost/utility/result_of.hpp at line 74
 -
 if I comment that line out everything compiles fine. It is just a warning,
 so rather than changing result_of.hpp our current workaround is just to
 disable the warning around the inclusion of future.hpp ."

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7663>
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