[boost] [sandbox][move] Regular requirement

From: Michael Marcin (mike.marcin_at_[hidden])
Date: 2008-07-31 12:49:07

I'm using the current move library in the sanbox by daniel james (which 
I believe is the 4th move emulation library I've used now). It seems to 
be very good so far and makes writing code that handles both move and 
copy a breeze. I hope this gets finalized and ready for review soon 
because a consistently used move emulation library would be a great aid 
to writing efficient libraries that work well together.

However the documentation says that objects have to model the Regular 
concept in order to model the Movable concept. This seems unfortunate as 
  Regular puts a lot of requirements on types that don't seem necessary 
to gain moving. It requires Assignable which requires a copy constructor 
and it requires EqualityComparable which seems unnecessary.

As a matter of fact I'm currently using the library with types I derive 
from boost::noncopyable on msvc 2008 and it is working wonderfully.

Can the Movable concept be relaxed to require only what is truly necessary?

Thanks,

Michael Marcin