std::auto_ptr vs. std::tr1::shared_ptr [duplicate]

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Which kind of pointer do I use when?

I read that std::auto_ptr is obsolete, so you must use std::tr1::shared_ptr instead. As I read difference is std::tr1::shared_ptr have reference counting, while std::auto_ptr haven't, so copying or assigning makes the resource changing its owner, with the source giving the ownership to the destination. Is it the only difference?

Answer 1

The smart pointer that closest matches the single ownership semantics of auto_ptr is std::unique_ptr. This should be used preferentially over std::shared_ptr, if available. See here.