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/*
* VNode.h
*
* Created on: 8 Apr 2013
* Author: s0965328
*/
#ifndef VNODE_H_
#define VNODE_H_
#include "ActNode.h"
namespace AutoDiff {
class VNode: public ActNode {
public:
VNode(double v=NaN_Double);
virtual ~VNode();
void collect_vnodes(boost::unordered_set<Node*>& nodes,unsigned int& total);
void eval_function();
void grad_reverse_0();
void grad_reverse_1();
unsigned int hess_reverse_0();
void hess_reverse_0_get_values(unsigned int i,double& x, double& x_bar, double& w, double& w_bar);
void hess_reverse_1(unsigned int i);
void hess_reverse_1_init_x_bar(unsigned int);
void update_x_bar(unsigned int,double);
void update_w_bar(unsigned int,double);
void hess_reverse_1_get_xw(unsigned int,double&,double&);
void hess_reverse_get_x(unsigned int,double& x);
void nonlinearEdges(EdgeSet&);
void inorder_visit(int level,ostream& oss);
string toString(int level);
TYPE getType();
#if FORWARD_ENABLED
void hess_forward(unsigned int nvar, double** ret_vec);
//! used for only forward hessian
//! the id has to be assigned starting from 0
int id;
static int DEFAULT_ID;
#endif
double val;
double u;
};
} // end namespace foo
#endif /* VNODE_H_ */
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