core::traits::Sub

The subtraction operator -.

Signature

pub trait Sub

Examples

Subtractable types:

assert!(3_u8 - 2_u8 == 1_u8);

Implementing Sub for a type:

#[derive(Copy, Drop, PartialEq)]
struct Point {
    x: u32,
    y: u32,
}

impl PointSub of Sub {
    fn sub(lhs: Point, rhs: Point) -> Point {
        Point {
            x: lhs.x - rhs.x,
            y: lhs.y - rhs.y,
        }
    }
}

let p1 = Point { x: 2, y: 3 };
let p2 = Point { x: 1, y: 0 };
let p3 = p1 - p2;
assert!(p3 == Point { x: 1, y: 3 });

Trait functions

sub

Performs the - operation.

Signature

fn sub(lhs: T, rhs: T) -> T

Examples

assert!(12 - 1 == 11);