Add 'board::Direction' enum

src/board/directions.rs

@@ -0,0 +1,22 @@
+/// A direction on the board. Either along the rook, bishop, or knight directions
+#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub enum Direction {
+    North,
+    West,
+    South,
+    East,
+
+    NorthWest,
+    SouthWest,
+    SouthEast,
+    NorthEast,
+
+    NorthNorthWest,
+    NorthWestWest,
+    SouthWestWest,
+    SouthSouthWest,
+    SouthSouthEast,
+    SouthEastEast,
+    NorthEastEast,
+    NorthNorthEast,
+}

src/board/mod.rs

@@ -1,6 +1,9 @@
 pub mod bitboard;
 pub use bitboard::*;
 
+pub mod directions;
+pub use directions::*;
+
 pub mod file;
 pub use file::*;