5
我有一个包含两个字段的结构体,我想用另一个字段(immutable borrow)修改一个字段(可变借用),但我从借用检查器中得到一个错误。可变地借用一个结构体字段,同时借用另一个结合体
例如,下面的代码:
struct Struct {
field1: Vec<i32>,
field2: Vec<i32>,
}
fn main() {
let mut strct = Struct {
field1: vec![1, 2, 3],
field2: vec![2, 3, 4],
};
strct.field1.retain(|v| !strct.field2.contains(v));
println!("{:?}", strct.field1);
}
提供了以下错误:
error[E0502]: cannot borrow `strct` as immutable because `strct.field1` is also borrowed as mutable
--> src/main.rs:12:25
|
12 | strct.field1.retain(|v| !strct.field2.contains(v));
| ------------ ^^^ ----- - mutable borrow ends here
| | | |
| | | borrow occurs due to use of `strct` in closure
| | immutable borrow occurs here
| mutable borrow occurs here
什么是封闭内更新使用另一个领域的锈的方法呢?
谢谢!我想知道为什么它在关闭中不起作用,但是...... –