[rs] Generic Types // Retangle

generic_retangle.rs

use std::marker::Copy;

fn main() {
    let r1 = Retangle {
        width: 50,
        height: 30.5,
    };
    println!("{:?}", r1.get_area())
}

#[derive(Debug)]
struct Retangle<T, U> {
    width: T,
    height: U,
}

impl<T, U> Retangle<T, U>
where
    T: Into<f64> + Copy,
    U: Into<f64> + Copy,
{
    fn get_area(&self) -> f64 {
        let width: f64 = self.width.into();
        let height: f64 = self.height.into();
        width * height
    }
}

use core::convert::Into
pub fn into(self) -> T

// Converts this type into the (usually inferred) input type.