[Boost-bugs] [Boost C++ Libraries] #8468: Compile error on visual studio 2010/2012 using vector with custom allocator and aligned types

Subject: [Boost-bugs] [Boost C++ Libraries] #8468: Compile error on visual studio 2010/2012 using vector with custom allocator and aligned types
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-04-21 22:19:51

#8468: Compile error on visual studio 2010/2012 using vector with custom allocator
and aligned types
-----------------------------------------------------------+----------------
 Reporter:  Rosario Leonardi <rosario.leonardi@…>          |       Owner:  igaztanaga
     Type:  Bugs                                           |      Status:  new       
Milestone:  To Be Determined                               |   Component:  intrusive 
  Version:  Boost Release Branch                           |    Severity:  Problem   
 Keywords:                                                 |  
-----------------------------------------------------------+----------------
 Using boost containers with an allocator that have a construct function I
 have an error saying that the type can't be aligned.
 This is caused by boost trying to check if is possible to call construct
 with the parameter that i pass.
 In has_member_function_callable_with_construct_impl it try to do something
 like that:

 {{{
 template<typename Fun>
 struct funwrap2_construct
         : Fun
 {
         funwrap2_construct();

         using Fun::construct;
         private_type construct(dont_care& , dont_care&)  const;
 };


 struct testConstruct
 {
     typedef funwrap2_construct< Foo > FunWrap;

     static bool const value =
                 sizeof(no_type) == sizeof(is_private_type(  (std::declval<
 FunWrap > ().construct(std::declval<MyObj *>(), std::declval<const
 MyObj&>() ), 0)));
 };
 }}}
 where MyObj is my aligned class and dontcare is an empty class with
 ellipse constructor.
 Ellipse can't be reference and that's why visual studio thinks that
 FunWrap::construct will use an aligned parameter passed on the stack.

 struct dont_care should have a templated constructor like boost::any.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8468>
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