Re: [Boost-bugs] [Boost C++ Libraries] #5271: is_convertible with 16-byte aligned types causes errors on MSVC

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5271: is_convertible with 16-byte aligned types causes errors on MSVC
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-03-07 13:51:22

#5271: is_convertible with 16-byte aligned types causes errors on MSVC
--------------------------------------+-------------------------------------
  Reporter:  mgaunard                 |       Owner:  johnmaddock                  
      Type:  Bugs                     |      Status:  new                          
 Milestone:  To Be Determined         |   Component:  type_traits                  
   Version:  Boost Development Trunk  |    Severity:  Problem                      
Resolution:                           |    Keywords:  is_convertible msvc alignment
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Comment (by mgaunard):

 It doesn't really seem fixable within the field of portable C++03, so I
 see three solutions:

 - use std::is_convertible or std::tr1::is_convertible if either is
 available
 - use the `__is_convertible_to` built-in on MSVC (available since 7.1)
 - use SFINAE extended to expressions, if available, to implement this
 trait without passing by value to a function

 Solution number 2 seems to be the easiest one for a quick fix, and the one
 most MSVC versions will be able to benefit from.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5271#comment:1>
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