X-Git-Url: http://git.scottworley.com/slidingtile/blobdiff_plain/32688d85f745574d7bbf941985234458d2776cce..cea272cfec1cf181ca673cc9454517b6d91a4f97:/sliding_tile_lib.h

diff --git a/sliding_tile_lib.h b/sliding_tile_lib.h
index 8967324..4d6c015 100644
--- a/sliding_tile_lib.h
+++ b/sliding_tile_lib.h
@@ -6,7 +6,11 @@
 const int BOARD_DIM = 4;
 const int BOARD_SIZE = BOARD_DIM * BOARD_DIM;
 
-typedef signed char Board[BOARD_SIZE];
+struct Board {
+  signed char board[BOARD_SIZE];
+  bool is_valid() const;
+  signed char hole() const;
+};
 std::istream& operator>>(std::istream& is, Board& board);
 
 extern signed char adjacent[BOARD_SIZE][5];