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#ifndef _BLEU_FF_H_
#define _BLEU_FF_H_
#include <vector>
#include <string>
#include "hg.h"
#include "ff.h"
class BLEUModelImpl;
class BLEUModel : public FeatureFunction {
public:
// param = "filename.lm [-o n]"
BLEUModel(const std::string& param);
~BLEUModel();
virtual void FinalTraversalFeatures(const void* context,
SparseVector<double>* features) const;
std::string DebugStateToString(const void* state) const;
static std::string usage(bool param,bool verbose);
protected:
virtual void TraversalFeaturesImpl(const SentenceMetadata& smeta,
const HG::Edge& edge,
const std::vector<const void*>& ant_contexts,
SparseVector<double>* features,
SparseVector<double>* estimated_features,
void* out_context) const;
private:
const int fid_;
mutable BLEUModelImpl* pimpl_;
};
#endif
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