X-Git-Url: http://git.scottworley.com/slidingtile/blobdiff_plain/5d2f7c7cebb5423fa9618a28871a81671c380041..49358f3664c36c346dba758ae1b7da9106c42e3b:/sliding_tile_lib.h?ds=sidebyside

diff --git a/sliding_tile_lib.h b/sliding_tile_lib.h
index 0bd3da3..c926761 100644
--- a/sliding_tile_lib.h
+++ b/sliding_tile_lib.h
@@ -30,6 +30,7 @@ struct Step {
   std::vector<Step*> successors(std::shared_ptr<Step> shared_this);
   static signed char adjacent[BOARD_SIZE][5];
 };
+std::ostream& operator<<(std::ostream& os, const Step& step);
 
 
 #endif /* _SLIDING_TILE_LIB_H */