[boost] [MultiIndex] Question about 'Derived' in bidir_node_iterator<Node, Derived>

From: Grzegorz Jakacki (jakackipub_at_[hidden])
Date: 2008-05-24 19:07:11

Hello,

I cannot figure out how is the argument 'Derived' of
'bidir_node_iterator' used. Help appreciated.

Thanks in advance
Greg

PS: template<typename Node,typename Derived=mpl::na> class
bidir_node_iterator ...