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#pragma once
#include <string>
#include "VWFeatureSource.h"
namespace Moses
{
class VWFeatureSourceBigrams : public VWFeatureSource
{
public:
VWFeatureSourceBigrams(const std::string &line)
: VWFeatureSource(line) {
ReadParameters();
// Call this last
VWFeatureBase::UpdateRegister();
}
void operator()(const InputType &input
, const Range &sourceRange
, Discriminative::Classifier &classifier
, Discriminative::FeatureVector &outFeatures) const {
for (size_t i = 1; i < input.GetSize(); i++) {
outFeatures.push_back(classifier.AddLabelIndependentFeature("bigram^" + GetWord(input, i - 1) + "^" + GetWord(input, i)));
}
}
virtual void SetParameter(const std::string& key, const std::string& value) {
VWFeatureSource::SetParameter(key, value);
}
};
}
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