lifetime_bounds.rs
Rust•マスター
Explorer
C40
C++40
C#40
Dart40
Go40
Java40
JavaScript40
Kotlin40
Objective-C40
Perl40
PHP40
Python40
R40
Ruby40
Rust
初級10
中級10
上級10
エキスパート5
マスター5
async_channel.rs
lifetime_bounds.rs
trait_object.rs
macro_recursive.rs
unsafe_transmute.rs
Shell40
Swift40
TypeScript40
lifetime_bounds.rs
Click to focus
1
2
3
4
5
6
7
8
9
10
struct Cache<'a, T: 'a + Clone> {↵
data: Vec<&'a T>,↵
map: HashMap<&'a str, T>,↵
}↵
impl<'a, T: Clone + 'a> Cache<'a, T> {↵
fn get_or_insert<F>(&mut self, key: &'a str, f: F) -> &T↵
where F: FnOnce() -> T {↵
self.map.entry(key).or_insert_with(f)↵
}↵
}
0WPM•0%•0:00•0/264(0%)|Ln 1, Col 1
UTF-8•Rust