Re: [Boost-bugs] [Boost C++ Libraries] #10882: error C2668: 'boost::swap' : ambiguous call to overloaded function (MSVC)

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #10882: error C2668: 'boost::swap' : ambiguous call to overloaded function (MSVC)
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-01-22 16:20:35

#10882: error C2668: 'boost::swap' : ambiguous call to overloaded function (MSVC)
--------------------------------------------+---------------------------
  Reporter:  Gabor Marton <martongabesz@…>  |      Owner:  apolukhin
      Type:  Bugs                           |     Status:  assigned
 Milestone:  Boost 1.58.0                   |  Component:  variant
   Version:  Boost 1.56.0                   |   Severity:  Problem
Resolution:                                 |   Keywords:  compile error
--------------------------------------------+---------------------------

Comment (by Thomas Riccardi <riccardi@…>):

 Replying to [comment:5 apolukhin]:
 > Replying to [comment:4 Thomas Riccardi <riccardi@…>]:
 > > Since which Boost version this issue is present? At least 1.56, but
 what about earlier versions (like 1.55)?
 >
 > Looks like this issue exists from the very beginning of the Varinat
 library.
 >
 >
 > > And does this ambiguous call resolution cause a risk on other
 compilers (like gcc)?
 >
 > Yes
 >
 > > Does it work by luck on gcc? Is this luck stable? Or is there a risk
 that under some more complicated scenario the issue could happen on gcc
 too (without the fix)?
 >
 > Issue happen if a class located in `boost::` namespace is being swapped
 and `boost/swap.hpp` is included. Anyway, it's a compile-time error, so
 you'll definitely know if you are hit by this issue.


 Thank you for all your precise answers.

 I added to this ticket 2 patches that backport the fix for this issue on
 boost 1.55.0 and 1.57.0.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10882#comment:6>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.