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https://github.com/moses-smt/mosesdecoder.git
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75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
#ifndef moses_TargetBigramFeature_h
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#define moses_TargetBigramFeature_h
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#include <string>
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#include <map>
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#include <boost/unordered_set.hpp>
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#include "moses/FF/FFState.h"
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#include "StatefulFeatureFunction.h"
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#include "moses/FactorCollection.h"
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#include "moses/Word.h"
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namespace Moses
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{
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class TargetBigramState : public FFState
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{
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public:
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TargetBigramState(const Word& word): m_word(word) {}
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const Word& GetWord() const {
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return m_word;
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}
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virtual int Compare(const FFState& other) const;
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private:
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Word m_word;
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};
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/** Sets the features of observed bigrams.
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*/
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class TargetBigramFeature : public StatefulFeatureFunction
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{
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public:
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TargetBigramFeature(const std::string &line);
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void Load();
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bool IsUseable(const FactorMask &mask) const;
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virtual const FFState* EmptyHypothesisState(const InputType &input) const;
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virtual FFState* EvaluateWhenApplied(const Hypothesis& cur_hypo, const FFState* prev_state,
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ScoreComponentCollection* accumulator) const;
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virtual FFState* EvaluateWhenApplied( const ChartHypothesis& /* cur_hypo */,
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int /* featureID */,
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ScoreComponentCollection* ) const {
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throw std::logic_error("TargetBigramFeature not valid in chart decoder");
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}
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void EvaluateWithSourceContext(const InputType &input
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, const InputPath &inputPath
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, const TargetPhrase &targetPhrase
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, const StackVec *stackVec
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, ScoreComponentCollection &scoreBreakdown
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, ScoreComponentCollection *estimatedFutureScore = NULL) const
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{}
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void EvaluateInIsolation(const Phrase &source
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, const TargetPhrase &targetPhrase
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, ScoreComponentCollection &scoreBreakdown
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, ScoreComponentCollection &estimatedFutureScore) const
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{}
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void SetParameter(const std::string& key, const std::string& value);
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private:
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FactorType m_factorType;
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Word m_bos;
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std::string m_filePath;
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boost::unordered_set<std::string> m_vocab;
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};
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}
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#endif // moses_TargetBigramFeature_h
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