-// Copyright 2014-2019 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
// run-rustfix
#![allow(unused_imports)]
-#![warn(clippy::all, clippy::style, clippy::mem_replace_option_with_none)]
+#![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 _ = an_option.take();
let an_option = &mut Some(1);
let _ = an_option.take();
}
+
+fn replace_with_default() {
+ let mut s = String::from("foo");
+ let _ = std::mem::take(&mut s);
+ let s = &mut String::from("foo");
+ let _ = std::mem::take(s);
+ let _ = std::mem::take(s);
+}
+
+fn main() {
+ replace_option_with_none();
+ replace_with_default();
+}