Preventing/handling space leaks

[ajb at spamcop.net]

G'day all.

Quoting Gabriel Dos Reis <gdr at integrable-solutions.net>:

> I think it is fair to characterize auto_ptr as a curiously broken
> class since its conception and design.

I also think that's a fair characterisation.  std::auto_ptr has always
struck me as a fairly brittle abstraction.  Learning that it has a new
exception safety issue doesn't exactly come as a shock.

Cheers,
Andrew Bromage