Module std::opsStable

Overloadable operators

Implementing these traits allows you to get an effect similar to overloading operators.

The values for the right hand side of an operator are automatically borrowed, so a + b is sugar for a.add(&b).

All of these traits are imported by the prelude, so they are available in every Rust program.

Example

This example creates a Point struct that implements Add and Sub, and then demonstrates adding and subtracting two Points.

#![feature(associated_types)] use std::ops::{Add, Sub}; #[derive(Show)] struct Point { x: int, y: int } impl Add for Point { type Output = Point; fn add(self, other: Point) -> Point { Point {x: self.x + other.x, y: self.y + other.y} } } impl Sub for Point { type Output = Point; fn sub(self, other: Point) -> Point { Point {x: self.x - other.x, y: self.y - other.y} } } fn main() { println!("{:?}", Point {x: 1, y: 0} + Point {x: 2, y: 3}); println!("{:?}", Point {x: 1, y: 0} - Point {x: 2, y: 3}); }

#![feature(associated_types)]

use std::ops::{Add, Sub};

#[derive(Show)]
struct Point {
    x: int,
    y: int
}

impl Add for Point {
    type Output = Point;

    fn add(self, other: Point) -> Point {
        Point {x: self.x + other.x, y: self.y + other.y}
    }
}

impl Sub for Point {
    type Output = Point;

    fn sub(self, other: Point) -> Point {
        Point {x: self.x - other.x, y: self.y - other.y}
    }
}
fn main() {
    println!("{:?}", Point {x: 1, y: 0} + Point {x: 2, y: 3});
    println!("{:?}", Point {x: 1, y: 0} - Point {x: 2, y: 3});
}

See the documentation for each trait for a minimum implementation that prints something to the screen.

Structs

FullRange	An unbounded range.
Range	A (half-open) range which is bounded at both ends.
RangeFrom	A range which is only bounded below.
RangeTo	A range which is only bounded above.

Traits

Add	The Add trait is used to specify the functionality of +.
BitAnd	The BitAnd trait is used to specify the functionality of &.
BitOr	The BitOr trait is used to specify the functionality of |.
BitXor	The BitXor trait is used to specify the functionality of ^.
Deref	The Deref trait is used to specify the functionality of dereferencing operations like *v.
DerefMut	The DerefMut trait is used to specify the functionality of dereferencing mutably like *v = 1;
Div	The Div trait is used to specify the functionality of /.
Drop	The Drop trait is used to run some code when a value goes out of scope. This is sometimes called a 'destructor'.
Fn	A version of the call operator that takes an immutable receiver.
FnMut	A version of the call operator that takes a mutable receiver.
FnOnce	A version of the call operator that takes a by-value receiver.
Index	The Index trait is used to specify the functionality of indexing operations like arr[idx] when used in an immutable context.
IndexMut	The IndexMut trait is used to specify the functionality of indexing operations like arr[idx], when used in a mutable context.
Mul	The Mul trait is used to specify the functionality of *.
Neg	The Neg trait is used to specify the functionality of unary -.
Not	The Not trait is used to specify the functionality of unary !.
Rem	The Rem trait is used to specify the functionality of %.
Shl	The Shl trait is used to specify the functionality of <<.
Shr	The Shr trait is used to specify the functionality of >>.
Sub	The Sub trait is used to specify the functionality of -.