new metric

1 files changed, 22 insertions, 0 deletions

diff --git a/mteval/ns_ssk.h b/mteval/ns_ssk.h
new file mode 100644
index 00000000..0d418770
--- /dev/null
+++ b/mteval/ns_ssk.h
@@ -0,0 +1,22 @@
+#ifndef _NS_SSK_H_
+#define _NS_SSK_H_
+
+#include "ns.h"
+
+class SSKMetric : public EvaluationMetric {
+  friend class EvaluationMetric;
+ private:
+  unsigned EditDistance(const std::string& hyp,
+                        const std::string& ref) const;
+ protected:
+  SSKMetric() : EvaluationMetric("SSK") {}
+
+ public:
+  virtual unsigned SufficientStatisticsVectorSize() const;
+  virtual void ComputeSufficientStatistics(const std::vector<WordID>& hyp,
+                                           const std::vector<std::vector<WordID> >& refs,
+                                           SufficientStats* out) const;
+  virtual float ComputeScore(const SufficientStats& stats) const;
+};
+
+#endif