added document level Bleu scoring to mert

1 files changed, 6 insertions, 2 deletions

diff --git a/mert/BleuScorer.h b/mert/BleuScorer.h
index 248b3e1d1..92d7fb9d5 100644
--- a/mert/BleuScorer.h
+++ b/mert/BleuScorer.h
@@ -65,14 +65,18 @@ public:
   bool OpenReference(const char* filename, std::size_t file_id);
 
   // NOTE: this function is used for unit testing.
-  bool OpenReferenceStream(std::istream* is, std::size_t file_id);
+  virtual bool OpenReferenceStream(std::istream* is, std::size_t file_id);
 
-private:
+	//private:
+protected:
   ReferenceLengthType m_ref_length_type;
 
   // reference translations.
   ScopedVector<Reference> m_references;
 
+  // constructor used by subclasses
+  BleuScorer(const std::string& name, const std::string& config): StatisticsBasedScorer(name,config) {}
+	
   // no copying allowed
   BleuScorer(const BleuScorer&);
   BleuScorer& operator=(const BleuScorer&);