the iterator class has a

Node$*$ mCurr $=$ reinterpret$\_$cast$(-1)$;

and within that class are the following methods:

Iterator& operator$++()\{\}$

Iterator operator$++($int$)\{\}$

Iterator& operator$--()\{\}$

Iterator operator$--($int$)\{\}$

Type& operator$*()\{\}$

how to solve in c$++$

struct Node $\{$

Type data;

Node$*$ next $=$ reinterpret$\_$cast$(-1)$;

Node$*$ prev $=$ reinterpre$\_$cast $(-1)$;

Node$($const Type& $\_$data, Node$*\_$next $=$ nullptr, Node$*\_$prev $=$ nullptr$)$ : data$(\_$data$),$ next$(\_$next$),$ prev$(\_$prev$)\{\}$

$\}$;