[board] Derive a bunch of traits for Color, Shape, Piece, and Square

board/src/piece.rs

@@ -1,12 +1,20 @@
 // Eryn Wells <eryn@erynwells.me>
 
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+use crate::square::Square;
+
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
 pub enum Color {
     White = 0,
     Black = 1,
 }
 
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+impl Color {
+    pub fn iter() -> impl Iterator<Item = Color> {
+        [Color::White, Color::Black].into_iter()
+    }
+}
+
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
 pub enum Shape {
     Pawn = 0,
     Knight = 1,
@@ -16,12 +24,26 @@ pub enum Shape {
     King = 5,
 }
 
+impl Shape {
+    pub fn iter() -> impl Iterator<Item = Shape> {
+        [
+            Shape::Pawn,
+            Shape::Knight,
+            Shape::Bishop,
+            Shape::Rook,
+            Shape::Queen,
+            Shape::King,
+        ]
+        .into_iter()
+    }
+}
+
 #[derive(Debug, Eq, PartialEq)]
 pub enum PiecePlacementError {
     PieceExistsOnSquare,
 }
 
-#[derive(Debug, Eq, PartialEq)]
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
 pub struct Piece {
     pub color: Color,
     pub shape: Shape,

board/src/square.rs

@@ -9,7 +9,7 @@ pub struct ParseSquareError;
 #[derive(Debug)]
 pub struct SquareOutOfBoundsError;
 
-#[derive(Debug, Eq, PartialEq)]
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
 pub struct Square {
     pub rank: u8,
     pub file: u8,