Re: [boost] [tuple] - Move constructors for Tuple

Subject: Re: [boost] [tuple] - Move constructors for Tuple
From: Adam Wulkiewicz (adam.wulkiewicz_at_[hidden])
Date: 2013-02-22 14:32:17

paul Fultz wrote:
>
> Im sorry, it should be something like this:
>
>      struct foo
>      {
>          tuple<int> x;
>      };
>
>      foo a;
>      a = foo();
>
...
>
> Because of this issue here:
> https://svn.boost.org/trac/boost/ticket/6167

It compiles now, thanks. Checked on clang (98, 11), gcc (98, 11), mingw, 
vs2010, for tuples and tuple::cons.

- in c++98 copy assignment is called
- in c++11 move assignment is called
- in vc2010 copy assignment is called, it probably just doesn't generate 
implicit move assignment for foo.

Btw, I saw the ticket. Everything that needs to be done is adding 
explicitly defined copy assignment taking const ref if 
BOOST_NO_CXX11_RVALUE_REFERENCES. Boost.Move 
BOOST_COPYABLE_AND_MOVABLE() macro adds only non-const ref version. If 
the const version was added as well it would probably fix all issues 
described in the ticket. Is there a reason why this isn't there?

Regards,
Adam