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#ifndef _FF_CONTEXT_H_
#define _FF_CONTEXT_H_
#include <vector>
#include "ff.h"
class RuleContextFeatures : public FeatureFunction {
public:
RuleContextFeatures(const std::string& param);
protected:
virtual void TraversalFeaturesImpl(const SentenceMetadata& smeta,
const Hypergraph::Edge& edge,
const std::vector<const void*>& ant_contexts,
SparseVector<double>* features,
SparseVector<double>* estimated_features,
void* context) const;
virtual void PrepareForInput(const SentenceMetadata& smeta);
private:
std::vector<WordID> current_input;
WordID kSOS, kEOS;
};
#endif
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