Re: [boost] [unique_ptr] So how is it used differently?

Sid Sacek wrote:

1) When would I choose unique_ptr<> over auto_ptr<> ?

Always. auto_ptr is deprecated and is dangerous. unique_ptr, for example, perfectly works with containers.

2) When would I choose unique_ptr<> over scoped_ptr<> ?

Whenever you need the ability to move. You can choose to always use it instead of scoped_ptr, that's perfectly safe and doesn't add any overhead.