rust 一些垃圾代码

use std::any::Any;
use core::fmt::Debug;
trait ColTrait: std::fmt::Debug{
    fn getself<T>(&self)->T;
}

#[derive(Debug)]
struct DataCell<T>{
    val:T,
}

// #[derive(Debug)]
struct Col{
    title:String,
    data:Vec<Box<dyn ColTrait>>
}

impl<T> ColTrait for DataCell<T> {
    // fn getself(&self) -> usize{
    //     // self.val
    //     1
    // }
}

// impl std::fmt::Display for dyn ColTrait {
//     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
//         write!(f, "<{:?}>", &self)
//     }
// }

// impl Debug for dyn ColTrait {
//     fn fmt(&self, f: &mut core::fmt::Formatter<'_>)->Result<(), std::fmt::Error> {
//         write!(f, "<START{:?}END>", &self)
//     }
// }

 fn main(){
    let a = DataCell{val:1.1};
    let b = DataCell{val:1};
    let c = Col{
        title: "A".to_string(),
        data: vec![Box::new(a), Box::new(b)],
    };
    let mut m = 1;
    for i in c.data.iter(){
        println!("{}", m);
        m +=1;
        println!("{:?}", *i);
    }

 }