X-Git-Url: http://git.scottworley.com/slidingtile/blobdiff_plain/49358f3664c36c346dba758ae1b7da9106c42e3b..310a7132ffc617b93969703de7f3bf1c5ea0fa30:/sliding_tile_lib.h?ds=sidebyside

diff --git a/sliding_tile_lib.h b/sliding_tile_lib.h
index c926761..772817e 100644
--- a/sliding_tile_lib.h
+++ b/sliding_tile_lib.h
@@ -20,6 +20,9 @@ struct Board {
   InvertedBoard invert() const;
   int distance(const Board& o) const;
   int distance(const InvertedBoard& invo) const;
+  bool operator==(const Board& o) const;
+  bool operator!=(const Board& o) const;
+  bool operator<(const Board& o) const;
 };
 std::istream& operator>>(std::istream& is, Board& board);
 std::ostream& operator<<(std::ostream& os, const Board& board);