On 1/26/13 7:58 AM, Dave Abrahams wrote:
I completely agree with the notion that a moved-from object simply should
not be used in any manner.
Well, that's just wrong, for the non-destructive move model used by the standard. The standard library relies on the ability to both assign and destroy moved-from elements. If you want destructive move, that's a whole research project. We on the committee who created rvalue references couldn't figure out how to make it work.
(The) ability to both assign and destroy? Is that all that it needs? Then we should be OK. A nulled recursive_wrapper can both be assigned and destroyed. It just can't do other things apart from that, such as get the underlying T& and call its member functions. Regards, -- Joel de Guzman http://www.boostpro.com http://boost-spirit.com