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#ifndef FF_CONLL_H_
#define FF_CONLL_H_
#include <vector>
#include <boost/xpressive/xpressive.hpp>
#include "ff.h"
using namespace boost::xpressive;
using namespace std;
class CoNLLFeatures : public FeatureFunction {
public:
CoNLLFeatures(const string& param);
protected:
virtual void TraversalFeaturesImpl(const SentenceMetadata& smeta,
const HG::Edge& edge,
const vector<const void*>& ant_contexts,
SparseVector<double>* features,
SparseVector<double>* estimated_features,
void* context) const;
virtual void PrepareForInput(const SentenceMetadata& smeta);
virtual void ParseArgs(const string& in);
virtual string Escape(const string& x) const;
virtual void ReplaceMacroWithString(string& feature_instance,
bool token_vs_label,
int relative_location,
const string& actual_token) const;
virtual void ReplaceTokenMacroWithString(string& feature_instance,
int relative_location,
const string& actual_token) const;
virtual void ReplaceLabelMacroWithString(string& feature_instance,
int relative_location,
const string& actual_token) const;
virtual void Error(const string&) const;
private:
vector<int> token_relative_locations, label_relative_locations;
string feature_template;
vector<WordID> current_input;
WordID kSOS, kEOS;
sregex macro_regex;
unsigned which_feat;
};
#endif
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