Re: [boost] Improving the assignment operators of various Boosttypes

Subject: Re: [boost] Improving the assignment operators of various Boosttypes
From: Peter Dimov (pdimov_at_[hidden])
Date: 2008-09-10 13:53:47

Michael Marcin:
...
> For rvalues yes but for lvalues you need move emulation. Which can be 
> implemented in the sandbox move library as follows.
>
> class foo
> {
> public:
>    foo();
>    foo( T t );
>    foo( boost::move_from<foo> other )
>    {
>       swap( other.source );
>    }
>
>    foo& operator=( foo rhs )
>    {
>       swap( rhs );
>    }

I see what you mean now, thanks. This is, I believe, the Adobe approach for 
move emulation:

http://stlab.adobe.com/group__move__related.html

It's based on the Adobe/Stepanov philosophy that all types are copyable, so 
it doesn't support move-only types. This takes away one motivation for 
having move. std::vector won't use adobe::move/boost::move, so this takes 
away the other motivation. What's left? :-)