The functor may change any fields of the \p item.second that is \ref value_type.
- Returns <tt> std::pair<bool, bool> </tt> where \p first is \p true if operation is successfull,
+ Returns <tt> std::pair<bool, bool> </tt> where \p first is \p true if operation is successful,
\p second is \p true if new item has been added or \p false if \p key already exists.
@warning See \ref cds_intrusive_item_creating "insert item troubleshooting"