Re: [boost] Re: A swapping implementation of the C++ library

From: Chris Jefferson (caj_at_[hidden])
Date: 2005-02-04 07:02:31

Aleksey Gurtovoy wrote:
> Chris Jefferson writes:
>>I'm implementing much of this for my own personal usage, but I hope
>>to submit the code to libstdc++-v3 (g++'s implementation of the c++
>>standard library). 
> 
> 
> May be also STLPort?
> 

I'm not against it :)
> 
>>While this may not be quite as general as the
>>ideas of "move symantics", it has the advantage of being
>>implementable now, and providing some significant improvements.
> 
> 
> Not to undermine your effort, but "move semantics" is implementable
> now as well.
> 

I had been thinking about that as well. My personal implementation looks 
alot like:
a) Add a new type_trait called moveable.
b) Add a function called move_wrap, where you construct objects you want 
to move like:

Class b, c=move_wrap(d);

b=move_wrap(c);

Where move_wrap passes it's parameter straight through if the type_trait 
moveable is false, and wraps it in a class called MoveWrap if moveable 
is true (which can then be used in the constructors of Class).

The advantage of just writing a swapping library is that it isn't going 
to involve adding new constructors / destructors based on a 
templated-based implementation of moveable, which might be incompatable 
with other people's definition of moveable.

Chris