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/*
* TrellisPath.h
*
* Created on: 16 Mar 2016
* Author: hieu
*/
#pragma once
#include <vector>
#include "../TypeDef.h"
#include "../ArcLists.h"
namespace Moses2
{
class Scores;
class MemPool;
class Hypothesis;
class System;
template<typename T>
class TrellisPaths;
class TrellisNode
{
public:
const ArcList *arcList;
size_t ind;
TrellisNode(const ArcList &varcList, size_t vind) :
arcList(&varcList), ind(vind)
{
}
const HypothesisBase *GetHypo() const
{
return (*arcList)[ind];
}
std::string Debug(const System &system) const;
};
class TrellisPath
{
public:
std::vector<TrellisNode> nodes;
int prevEdgeChanged;
/**< the last node that was wiggled to create this path
, or NOT_FOUND if this path is the best trans so consist of only hypos
*/
TrellisPath(const Hypothesis *hypo, const ArcLists &arcLists);
/** create path from another path, deviate at edgeIndex by using arc instead,
* which may change other hypo back from there
*/
TrellisPath(const TrellisPath &origPath, size_t edgeIndex,
const TrellisNode &newNode, const ArcLists &arcLists, MemPool &pool,
const System &system);
virtual ~TrellisPath();
const Scores &GetScores() const
{
return *m_scores;
}
SCORE GetFutureScore() const;
std::string Debug(const System &system) const;
void OutputToStream(std::ostream &out, const System &system) const;
std::string OutputTargetPhrase(const System &system) const;
//! create a set of next best paths by wiggling 1 of the node at a time.
void CreateDeviantPaths(TrellisPaths<TrellisPath> &paths, const ArcLists &arcLists,
MemPool &pool, const System &system) const;
protected:
const Scores *m_scores;
void AddNodes(const Hypothesis *hypo, const ArcLists &arcLists);
void CalcScores(const Scores &origScores, const Scores &origHypoScores,
const Scores &newHypoScores, MemPool &pool, const System &system);
};
} /* namespace Moses2 */
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