鉴于以下struct
和impl
:返回A VEC的迭代器在RefCell
use std::slice::Iter;
use std::cell::RefCell;
struct Foo {
bar: RefCell<Vec<u32>>,
}
impl Foo {
pub fn iter(&self) -> Iter<u32> {
self.bar.borrow().iter()
}
}
fn main() {}
我得到了一生的问题的错误消息:
error: borrowed value does not live long enough
--> src/main.rs:9:9
|
9 | self.bar.borrow().iter()
| ^^^^^^^^^^^^^^^^^ does not live long enough
10 | }
| - temporary value only lives until here
|
note: borrowed value must be valid for the anonymous lifetime #1 defined on the body at 8:36...
--> src/main.rs:8:37
|
8 | pub fn iter(&self) -> Iter<u32> {
| _____________________________________^ starting here...
9 | | self.bar.borrow().iter()
10 | | }
| |_____^ ...ending here
我怎么能够返回和使用bar
s迭代器?
终身是如此艰难!恭喜理解并解释它。 – Moebius