mosesdecoder/moses/src/HypothesisStack.h

#ifndef moses_HypothesisStack_h
#define moses_HypothesisStack_h

#include <vector>
#include <set>
#include "Hypothesis.h"
#include "WordsBitmap.h"

namespace Moses
{
  
class Manager;

class HypothesisStack
{
  
protected:
	typedef std::set< Hypothesis*, HypothesisRecombinationOrderer > _HCType;
	_HCType m_hypos; /**< contains hypotheses */
  Manager& m_manager;

public:
  HypothesisStack(Manager& manager): m_manager(manager) {}
	typedef _HCType::iterator iterator;
	typedef _HCType::const_iterator const_iterator;
	//! iterators
	const_iterator begin() const { return m_hypos.begin(); }
	const_iterator end() const { return m_hypos.end(); }
	size_t size() const { return m_hypos.size(); }
	virtual inline float GetWorstScore() const { return -std::numeric_limits<float>::infinity(); };
	virtual float GetWorstScoreForBitmap( WordsBitmapID ) { return -std::numeric_limits<float>::infinity(); };
	virtual float GetWorstScoreForBitmap( WordsBitmap ) { return -std::numeric_limits<float>::infinity(); };

	virtual ~HypothesisStack();
	virtual bool AddPrune(Hypothesis *hypothesis) = 0;
	virtual const Hypothesis *GetBestHypothesis() const = 0;
	virtual std::vector<const Hypothesis*> GetSortedList() const = 0;

	//! remove hypothesis pointed to by iterator but don't delete the object
	virtual void Detach(const HypothesisStack::iterator &iter);
	/** destroy Hypothesis pointed to by iterator (object pool version) */
	virtual void Remove(const HypothesisStack::iterator &iter);

};

}

#endif