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- /*
- * Node.h
- *
- * Created on: 8 Apr 2013
- * Author: s0965328
- */
- #ifndef NODE_H_
- #define NODE_H_
- #include <boost/unordered_set.hpp>
- #include "auto_diff_types.h"
- using namespace std;
- namespace AutoDiff {
- class EdgeSet;
- class Node {
- public:
- Node();
- virtual ~Node();
- virtual void eval_function() = 0;
- virtual void grad_reverse_0() = 0;
- virtual void grad_reverse_1_init_adj() = 0;
- virtual void grad_reverse_1() = 0;
- virtual void update_adj(double& v) = 0;
- virtual unsigned int hess_reverse_0() = 0;
- virtual void hess_reverse_0_init_n_in_arcs();
- virtual void hess_reverse_0_get_values(unsigned int,double&, double&,double&, double&) = 0;
- virtual void hess_reverse_1(unsigned int i) = 0;
- virtual void hess_reverse_1_init_x_bar(unsigned int) = 0;
- virtual void update_x_bar(unsigned int,double) = 0;
- virtual void update_w_bar(unsigned int,double) = 0;
- virtual void hess_reverse_1_get_xw(unsigned int, double&,double&) = 0;
- virtual void hess_reverse_get_x(unsigned int,double& x)=0;
- virtual void hess_reverse_1_clear_index();
- //routing for checking non-zero structures
- virtual void collect_vnodes(boost::unordered_set<Node*>& nodes,unsigned int& total) = 0;
- virtual void nonlinearEdges(EdgeSet&) = 0;
- #if FORWARD_ENABLED
- virtual void hess_forward(unsigned int len, double** ret_vec) = 0;
- #endif
- //other utility methods
- virtual void inorder_visit( int level,ostream& oss) = 0;
- virtual string toString(int levl) = 0;
- virtual TYPE getType() = 0;
- //! index on the tape
- unsigned int index;
- //! number of incoming arcs
- //! n_in_arcs in root node equals 1 before evaluation and 0 after evaluation
- unsigned int n_in_arcs;
- static unsigned int DEFAULT_INDEX;
- };
- } // end namespace foo
- #endif /* NODE_H_ */
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