virtual ~wt_node_internal();
virtual uint rank(uint symbol, uint pos, uint level, wt_coder * c);
virtual uint select(uint symbol, uint pos, uint level, wt_coder * c);
virtual ~wt_node_internal();
virtual uint rank(uint symbol, uint pos, uint level, wt_coder * c);
virtual uint select(uint symbol, uint pos, uint level, wt_coder * c);