yap/example/autodiff_library/Node.h

66 lines
1.7 KiB
C++

/*
* 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_ */