Rust연습] cow_빨라서 최고borrow에서 적극 활용하자

 

 

 

 

 

 

 

 1 use std::borrow::Cow;
 2 
 3 #[derive(Debug)]
 4 struct User<'a> {
 5     name: Cow<'a, str>,
 6 }
 7 
 8 fn main() {
 9     let name_1 = "User 1";
10     let name_2 = "User 2".to_string();
11 
12     let user_1 = User {
13         name: name_1.into(),
14     };
15 
16     let user_2 = User {
17         name: name_2.into(),
18     };
19 
20     println!("User 1 is {user_1:?} and User 2 is {user_2:?}");
21 }

 

 

 

 

 

결과

 

 

warning: `training_rustacean_rust` (bin "training_rustacean_rust") generated 1 warning
    Finished dev [unoptimized + debuginfo] target(s) in 0.08s
     Running `target/debug/training_rustacean_rust`
User 1 is User { name: "User 1" } and User 2 is User { name: "User 2" }

 

 

 

 

 

https://www.youtube.com/watch?v=1UrSBfjZaU0&t=9s