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#ifndef _FF_RULESHAPE_H_
#define _FF_RULESHAPE_H_
#include <vector>
#include "ff.h"
class RuleShapeFeatures : public FeatureFunction {
public:
RuleShapeFeatures(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;
private:
struct Node {
int fid_;
Node() : fid_(-1) {}
std::map<bool, Node> next_;
};
Node fidtree_;
static const Node* Advance(const Node* cur, bool val) {
std::map<bool, Node>::const_iterator it = cur->next_.find(val);
if (it == cur->next_.end()) return NULL;
return &it->second;
}
};
#endif
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