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