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45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
#pragma once
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namespace Moses
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{
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class Hypothesis;
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class TranslationOption;
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class InputType;
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class TargetPhrase;
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class WordsBitmap;
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/**
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* Contains all that a feature function can access without affecting recombination.
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* For stateless features, this is all that it can access. Currently this is not
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* used for stateful features, as it would need to be retro-fitted to the LM feature.
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* TODO: Expose source segmentation,lattice path.
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* XXX Don't add anything to the context that would break recombination XXX
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**/
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class PhraseBasedFeatureContext
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{
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// The context either has a hypothesis (during search), or a TranslationOption and
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// source sentence (during pre-calculation).
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const Hypothesis* m_hypothesis;
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const TranslationOption& m_translationOption;
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const InputType& m_source;
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public:
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PhraseBasedFeatureContext(const Hypothesis* hypothesis);
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PhraseBasedFeatureContext(const TranslationOption& translationOption,
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const InputType& source);
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const TranslationOption& GetTranslationOption() const {
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return m_translationOption;
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}
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const InputType& GetSource() const {
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return m_source;
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}
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const TargetPhrase& GetTargetPhrase() const; //convenience method
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const WordsBitmap& GetWordsBitmap() const;
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};
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} // namespace
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