父 trait
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pardon110 的个人博客
父 trait
- Rust 没有“继承”，但可以将一个trait 定义为另一个trait的超集（即父 trait）
trait Person {
fn name(&self) -> String;
}
trait Student: Person {
fn university(&self) -> String;
}
trait Programer {
fn fav_language(&self) -> String;
}
trait CompSciStudent: Programer + Student {
fn git_username(&self) -> String;
}
struct P;
impl CompSciStudent for P {
fn git_username(&self) -> String {
"zhisan.git".to_owned()
}
}
impl Person for P {
fn name(&self) -> String {
"zhangsan".to_owned()
}
}
impl Programer for P {
fn fav_language(&self) -> String {
"history".to_owned()
}
}
impl Student for P {
fn university(&self) -> String {
"Baida".to_owned()
}
}
fn comp_sci_student_greeting(student: &dyn CompSciStudent) -> String {
format!(
"My name is {} and I attend {}. My favorite language is {}.My GitHub username is {}",
student.name(),
student.university(),
student.fav_language(),
student.git_username()
)
}
fn main() {
let p = P;
let s = comp_sci_student_greeting(&p);
println!("{}", s);
}
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