2020-02-25 11:48:50 +02:00
|
|
|
// traits1.rs
|
|
|
|
// Time to implement some traits!
|
2020-07-11 04:01:38 +02:00
|
|
|
//
|
2020-02-25 11:48:50 +02:00
|
|
|
// Your task is to implement the trait
|
|
|
|
// `AppendBar' for the type `String'.
|
2020-07-11 04:01:38 +02:00
|
|
|
//
|
2020-02-25 11:48:50 +02:00
|
|
|
// The trait AppendBar has only one function,
|
|
|
|
// which appends "Bar" to any object
|
|
|
|
// implementing this trait.
|
2022-07-14 18:14:41 +02:00
|
|
|
// Execute `rustlings hint traits1` or use the `hint` watch subcommand for a hint.
|
2020-02-25 11:48:50 +02:00
|
|
|
|
|
|
|
// I AM NOT DONE
|
2020-07-11 04:01:38 +02:00
|
|
|
|
2020-02-25 11:48:50 +02:00
|
|
|
trait AppendBar {
|
|
|
|
fn append_bar(self) -> Self;
|
|
|
|
}
|
|
|
|
|
|
|
|
impl AppendBar for String {
|
|
|
|
//Add your code here
|
|
|
|
}
|
|
|
|
|
|
|
|
fn main() {
|
|
|
|
let s = String::from("Foo");
|
|
|
|
let s = s.append_bar();
|
|
|
|
println!("s: {}", s);
|
|
|
|
}
|
|
|
|
|
|
|
|
#[cfg(test)]
|
|
|
|
mod tests {
|
|
|
|
use super::*;
|
|
|
|
|
|
|
|
#[test]
|
2021-10-18 13:57:12 +02:00
|
|
|
fn is_foo_bar() {
|
2020-02-25 11:48:50 +02:00
|
|
|
assert_eq!(String::from("Foo").append_bar(), String::from("FooBar"));
|
|
|
|
}
|
|
|
|
|
|
|
|
#[test]
|
2021-10-18 13:57:12 +02:00
|
|
|
fn is_bar_bar() {
|
2020-02-25 11:48:50 +02:00
|
|
|
assert_eq!(
|
|
|
|
String::from("").append_bar().append_bar(),
|
|
|
|
String::from("BarBar")
|
|
|
|
);
|
|
|
|
}
|
2020-07-11 04:01:38 +02:00
|
|
|
}
|