[boost] [smart_ptr] new shared_from_this behavior with multiple owners

From: Frank Mori Hess (fmhess_at_[hidden])
Date: 2008-03-25 19:55:21

I just want to point out that even with the fix that went in today, the 
behavior of enable_shared_from_this::shared_from_this when multiple 
shared_ptrs take independent ownership is inconsistent with the old 
behavior.  The old behavior was that shared_from_this would return a 
shared_ptr that shared ownership with whichever shared_ptr took ownership 
of the object last.  The new behavior is shared_from_this always returns a 
shared_ptr that shares ownership with the first shared_ptr to take 
ownership of the object.  The attached example illustrates the difference 
when compiled against the old lib and svn trunk.

I don't want to make a big deal of this, as I actually think the new 
behavior is more sane, but I thought I should point it out.  My preferred 
solution would be to just point out the change in the next release notes 
or something like that.

-- 
Frank