mosesdecoder/moses/FF/DistortionScoreProducer.h
2013-06-20 12:50:41 +01:00

46 lines
1.1 KiB
C++

#pragma once
#include <stdexcept>
#include <string>
#include "StatefulFeatureFunction.h"
#include "util/check.hh"
namespace Moses
{
class FFState;
class ScoreComponentCollection;
class Hypothesis;
class ChartHypothesis;
class WordsRange;
/** Calculates Distortion scores
*/
class DistortionScoreProducer : public StatefulFeatureFunction
{
public:
DistortionScoreProducer(const std::string &line);
bool IsUseable(const FactorMask &mask) const {
return true;
}
static float CalculateDistortionScore(const Hypothesis& hypo,
const WordsRange &prev, const WordsRange &curr, const int FirstGapPosition);
virtual const FFState* EmptyHypothesisState(const InputType &input) const;
virtual FFState* Evaluate(
const Hypothesis& cur_hypo,
const FFState* prev_state,
ScoreComponentCollection* accumulator) const;
virtual FFState* EvaluateChart(
const ChartHypothesis& /* cur_hypo */,
int /* featureID - used to index the state in the previous hypotheses */,
ScoreComponentCollection*) const {
throw std::logic_error("DistortionScoreProducer not supported in chart decoder, yet");
}
};
}