Re: [Boost-users] nondynamic: A utility class that promotes safe programming

From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2008-03-28 11:42:24

AMDG

Ovanes Markarian wrote:   
> What do you think how this allocator will allocate the number of these 
> element? Actually in any possible way.
> It can use new[] or new char[sizeof(T)*NumElems] or use an own 
> mem-manager. And the worse thing you can't make
> allocator friend of your class, since users of containers can pass 
> their own allocators.

It can't use new[] because new[] constructs the elements immediately.

> And despite all enumerated facts you will fail to compile, since the 
> function address will fail to return the pointer to x, because it is 
> prohibited in your case.

Yep.  This a serious problem.  overloading operator& can cause generic code
to break randomly, because most people assume that &x will work.  (And those
that don't probably circumvent your defenses by using boost::addressof, 
anyway.)

In Christ,
Steven Watanabe