tracks/rust/exercises/bowling/src/lib.rs in trackler-2.2.1.128 vs tracks/rust/exercises/bowling/src/lib.rs in trackler-2.2.1.129

@@ -1,21 +1,43 @@
\ No newline at end of file
+#[derive(Debug, PartialEq)]
+pub enum Error {
+    NotEnoughPinsLeft,
+    GameComplete,
+}
+
+pub struct BowlingGame {
+}
+
+impl BowlingGame {
+    pub fn new() -> Self {
+        unimplemented!();
+    }
+
+    pub fn roll(&mut self, pins: u16) -> Result<(), Error> {
+        unimplemented!("Record that {} pins have been scored", pins);
+    }
+
+    pub fn score(&self) -> Option<u16> {
+        unimplemented!("Return the score if the game is complete, or None if not.");
+    }
+}