Rust 1.26.2 已发布，Rust 是一门专注于安全性，速度和并发性的系统编程语言。 如果你已安装过 Rust，升级至 Rust 1.26.2 非常方便 $ rustup update stable 该补丁版本修复了 let mut foo = Some("foo".to_string());
let bar = &mut foo;
match bar {
Some(baz) => {
bar.take(); // Should not be permitted, as baz has a unique reference to the bar pointer.
},
None => unreachable!(),
}1.26.2 将拒绝上面的代码，并显示以下错误消息： error[E0499]: cannot borrow `*bar` as mutable more than once at a time
--> src/main.rs:6:9
|
5 | Some(baz) => {
| --- first mutable borrow occurs here
6 | bar.take(); // Should not be permitted, as baz has a ...
| ^^^ second mutable borrow occurs here
...
9 | }
| - first borrow ends here
error: aborting due to previous error详细更新说明请查看 https://blog.rust-lang.org/2018/06/05/Rust-1.26.2.html |
