From 5ab6fae9e912eb2e5762b92e8b646ff0d9a13755 Mon Sep 17 00:00:00 2001
From: Nicole L <dlegare.1001@gmail.com>
Date: Thu, 27 Feb 2025 12:33:06 -0800
Subject: [PATCH] Suppress warnings for elevator exercise (#2668)

---
 src/user-defined-types/exercise.md | 10 ++++++++++
 src/user-defined-types/exercise.rs |  4 ++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/user-defined-types/exercise.md b/src/user-defined-types/exercise.md
index 4377ceb3..524d258b 100644
--- a/src/user-defined-types/exercise.md
+++ b/src/user-defined-types/exercise.md
@@ -41,3 +41,13 @@ out of these structures.
 
 {{#include exercise.rs:main}}
 ```
+
+<details>
+
+- If students ask about `#![allow(dead_code)]` at the top of the exercise, it's
+  necessary because the only thing we do with the `Event` type is print it out.
+  Due to a nuance of how the compiler checks for dead code this causes it to
+  think that the code is unused. They can ignore it for the purpose of this
+  exercise.
+
+</details>
diff --git a/src/user-defined-types/exercise.rs b/src/user-defined-types/exercise.rs
index d8041993..6aced372 100644
--- a/src/user-defined-types/exercise.rs
+++ b/src/user-defined-types/exercise.rs
@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![allow(dead_code)]
-
 // ANCHOR: solution
 // ANCHOR: event
+#![allow(dead_code)]
+
 #[derive(Debug)]
 /// An event in the elevator system that the controller must react to.
 enum Event {