make pro use new interface

1 files changed, 4 insertions, 0 deletions

diff --git a/mteval/ns.h b/mteval/ns.h
index d88c263b..4e4c6975 100644
--- a/mteval/ns.h
+++ b/mteval/ns.h
@@ -94,6 +94,10 @@ class EvaluationMetric {
  public:
   const std::string& MetricId() const { return name_; }
 
+  // returns true for metrics like WER and TER where lower scores are better
+  // false for metrics like BLEU and METEOR where higher scores are better
+  virtual bool IsErrorMetric() const;
+
   virtual unsigned SufficientStatisticsVectorSize() const;
   virtual float ComputeScore(const SufficientStats& stats) const = 0;
   virtual std::string DetailedScore(const SufficientStats& stats) const;