Function tao_of_rust::ch02::generics_trait::impl_debug_trait

pub fn impl_debug_trait()

impl Debug trait示例

Basic usage:

use std::fmt::*;
struct Point {
    x: i32,
    y: i32,
}
// Debug trait中定义了fmt方法
impl Debug for Point {
    fn fmt(&self, f: &mut Formatter) -> Result {
        // 使用编译器内置的write!宏来实现
        write!(f, "Point {{ x: {}, y: {} }}", self.x, self.y)
    }
}
let origin = Point { x: 0, y: 0 };
println!("The origin is: {:?}", origin);