Protocol std::prelude::Option::Formattable

Re-export from std::fmt::Formattable

protocol Formattable<Self, F = NullFormatter> { ... }
F: Formatter<F>

source

Types that can be formatted. This is the standard way to implement custom formatting for types.

Example

struct Point3D { x: i32, y: i32, z: i32 }
impl Point3D {
    use std::fmt::{Formatter, Result, write};

    fn fmt<F: Formatter<F>>(self: &Point3D, f: &mut F) -> Result {
        write!(f, "({}, {}, {})", self.x, self.y, self.z)
    }
}

// prints "You are at (1, 2, 3)"
println!("You are at {}", Point3D { x: 1, y: 2, z: 3 });
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Required methods