std::auto_ptr or boost::shared_ptr for pImpl idiom?

Question

When using the pImpl idiom is it preferable to use a boost:shared_ptr instead of a std::auto_ptr? I\'m sure I once read that the boost version is

Answer 1

I have been really happy about impl_ptr by Vladimir Batov [modified]. It makes it really easy to create a pImpl without needing to make explicit copy-constructor and assignment operator.

I have modified the original code, so it now resembles a shared_ptr, so it can be used in epilog code, and remains speedy.