From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Wed, 16 Mar 2022 14:29:50 +0000 (+0000)
Subject: CLIPPY COMPLAINS
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=0886c231f045bf1016dd8f468975ff90eb6f8655;p=rust-experiments.git

CLIPPY COMPLAINS
---

diff --git a/src/main.rs b/src/main.rs
index 5df7139..26c43dd 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,14 @@
-fn main() {
+trait Trait { }
+struct Struct;
+impl Trait for Struct { }
+
+fn optmap(s: Option<&Struct>) -> Option<&dyn Trait> {
+    match s {
+        Some(s) => Some(s),
+        None => None,
+    }
 }
 
-#[test]
-fn wombat() {
-    dbg!("wombat");
+fn main() {
+    optmap(None);
 }