[board] Move piece! and position! macros to a new macros.rs module

board/src/macros.rs

@@ -0,0 +1,20 @@
+// Eryn Wells <eryn@erynwells.me>
+
+#[macro_export]
+macro_rules! piece {
+    ($color:ident $shape:ident) => {
+        $crate::piece::Piece::new($crate::piece::Color::$color, $crate::piece::Shape::$shape)
+    };
+    ($color:ident $shape:ident on $square:ident) => {
+        $crate::piece::PlacedPiece::new(piece!($color $shape), $crate::square::Square::$square)
+    }
+}
+
+#[macro_export]
+macro_rules! position {
+    [$($color:ident $shape:ident on $square:ident),* $(,)?] => {
+        $crate::PositionBuilder::new()
+            $(.place_piece(piece!($color $shape on $square)))*
+            .build()
+    };
+}