Rust: From Into - grizlupo/_ GitHub Wiki

use std::convert::From;

#[derive(Debug)]
struct Me {
    value: i32
}

impl From<i32> for Me {
    fn from(value: i32) -> Self {
        Self { value }
    }
}

fn main() {
    println!("{:?}", Me::from(10));
}

#![allow(unused)]
use std::convert::From;

#[derive(Debug)]
struct Me {
    value: i32
}

impl From<Me> for String {
    fn from(me: Me) -> String {
        format!("value: {}", me.value)
    }
}

fn main() {
    println!("{}", String::from(Me { value: 10 }));
}

use std::convert::Into;

#[derive(Debug)]
struct Me {
    value: i32
}

impl Into<String> for Me {
    fn into(self) -> String {
        format!("value: {}", self.value)
    }
}

fn main() {
    let s: String = (Me { value: 10 }).into();
    println!("{}", s);
}