泛型

函数

use std::ops::Add;

fn main() {
    let result = add(1, 2);
    println!("{}", result);

    let result = add(1u8,2u8);
    println!("{}", result);
}

fn add<T: Add<Output = T>>(a: T, b: T) -> T {
    a + b
}

结构体

fn main() {
    let point_a = Point { x: 1, y: 2 };
    println!("result {:#?}", point_a)
}

#[derive(Debug)]
struct Point<T = i32> {
    x: T,
    y: T,
}