Rust编程进阶：009、trait_bound有条件的实现方法

使用trait_bound有条件的实现方法：

1trait GetName {
2    fn get_name(&self) -> &String;
3}
4
5trait GetAge {
6    fn get_age(&self) -> u32;
7}
8
9struct PeopleMatchInformation<T, U> {
10    master: T,
11    student: U,
12}
13
14impl<T: GetName + GetAge, U: GetName + GetAge> PeopleMatchInformation<T, U> {
15    fn print_all_information(&self) {
16        println!("in print_all_information");
17        println!("master name = {}", self.master.get_name());
18        println!("master age = {}", self.master.get_age());
19        println!("student name = {}", self.student.get_name());
20        println!("student age = {}", self.student.get_age());
21    }
22}
23
24struct Teacher {
25    name: String,
26    age: u32,
27}
28
29impl GetName for Teacher {
30    fn get_name(&self) -> &String {
31        &(self.name)
32    }
33}
34
35impl GetAge for Teacher {
36    fn get_age(&self) -> u32 {
37        self.age
38    }
39}
40
41struct Student {
42    name: String,
43    age: u32,
44}
45
46impl GetName for Student {
47    fn get_name(&self) -> &String {
48        &(self.name)
49    }
50}
51
52impl GetAge for Student {
53    fn get_age(&self) -> u32 {
54        self.age
55    }
56}
57
58fn main() {
59    let s = Student { name: "xiaoming".to_string(), age: 15 };
60    let t = Teacher { name: "xiaohuang".to_string(), age: 30 };
61    let m = PeopleMatchInformation { master: t, student: s };
62    m.print_all_information();
63}

本节全部源代码：
https://github.com/anonymousGiga/learn_rust/blob/master/learn_trait4/src/main.rs