`core::fmt::Display`

pub trait Display {
    // Required method
    fn fmt(&self, f: &mut Formatter<'_>) -> Result;
}

format trait for {}
user-facing output, cannot derive
implements ToString, prefer Display
internationalization, only one impl

Examples

`impl Display`

use std::fmt;

struct Point {
    x: i32,
    y: i32,
}

impl fmt::Display for Point {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "({}, {})", self.x, self.y)
    }
}

let origin = Point { x: 0, y: 0 };

assert_eq!(format!("The origin is: {origin}"), "The origin is: (0, 0)");

References