1 files changed, 46 insertions, 0 deletions
diff --git a/meap/meap-code/ch4/ch4-check-sats-with-copy-trait.rs b/meap/meap-code/ch4/ch4-check-sats-with-copy-trait.rs
new file mode 100644
index 0000000..4126e05
--- /dev/null
+++ b/meap/meap-code/ch4/ch4-check-sats-with-copy-trait.rs
@@ -0,0 +1,46 @@
+#[derive(Debug)]
+struct CubeSat {
+  id: u64,
+}
+
+#[derive(Debug)]
+enum StatusMessage {
+  Ok,
+}
+
+impl Copy for CubeSat { }
+
+impl Copy for StatusMessage { }
+
+impl Clone for CubeSat { // <1>
+  fn clone(&self) -> Self {
+    CubeSat { id: self.id } //<2>
+  }
+}
+
+impl Clone for StatusMessage {
+  fn clone(&self) -> Self {
+    *self // <3>
+  }
+}
+
+fn check_status(sat_id: CubeSat) -> StatusMessage {
+  StatusMessage::Ok
+}
+
+fn main () {
+  let sat_a = CubeSat { id: 0 };
+  let sat_b = CubeSat { id: 1 };
+  let sat_c = CubeSat { id: 2 };
+
+  let a_status = check_status(sat_a);
+  let b_status = check_status(sat_b);
+  let c_status = check_status(sat_c);
+  println!("a: {:?}, b: {:?}, c: {:?}", a_status, b_status, c_status);
+
+  // "waiting" ...
+  let a_status = check_status(sat_a);
+  let b_status = check_status(sat_b);
+  let c_status = check_status(sat_c);
+  println!("a: {:?}, b: {:?}, c: {:?}", a_status, b_status, c_status);
+}