Auto merge of #68717 - petrochenkov:stabexpat, r=varkor

[rust.git] / tests / ui / mem_replace.rs

diff --git a/tests/ui/mem_replace.rs b/tests/ui/mem_replace.rs
index 62df42ef2d290786d45a905cc64e49c3f20cdeb5..60f527810716fb909e05271ef50ab43f9d93be60 100644 (file)
--- a/tests/ui/mem_replace.rs
+++ b/tests/ui/mem_replace.rs
@@ -1,11 +1,30 @@
-#![feature(tool_lints)]
-#![warn(clippy::all, clippy::style, clippy::mem_replace_option_with_none)]
+// run-rustfix
+#![allow(unused_imports)]
+#![warn(
+    clippy::all,
+    clippy::style,
+    clippy::mem_replace_option_with_none,
+    clippy::mem_replace_with_default
+)]
 
 use std::mem;
 
-fn main() {
+fn replace_option_with_none() {
     let mut an_option = Some(1);
     let _ = mem::replace(&mut an_option, None);
     let an_option = &mut Some(1);
     let _ = mem::replace(an_option, None);
 }
+
+fn replace_with_default() {
+    let mut s = String::from("foo");
+    let _ = std::mem::replace(&mut s, String::default());
+    let s = &mut String::from("foo");
+    let _ = std::mem::replace(s, String::default());
+    let _ = std::mem::replace(s, Default::default());
+}
+
+fn main() {
+    replace_option_with_none();
+    replace_with_default();
+}