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[mussa.git] / alg / conserved_path.hpp

diff --git a/alg/conserved_path.hpp b/alg/conserved_path.hpp
index 17f1bb7ff053064a8ac8f441fa682f4546d29ece..cc2dda1736a9a6b326dfd14ac1153c907de010db 100644 (file)
--- a/alg/conserved_path.hpp
+++ b/alg/conserved_path.hpp
@@ -57,6 +57,9 @@ struct ExtendedConservedPath : public ConservedPath
    */
   ExtendedConservedPath& extend(int growth=1);
 
+  // output some useful information
+  friend std::ostream& operator<<(std::ostream&, const ExtendedConservedPath&);
+
   //! size of extended window
   int window_size;
 };