Trait Add

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pub trait Add<Rhs = Self> {
    type Output;

    // Required method
    const fn add(self, rhs: Rhs) -> Self::Output;
}

Expand description

core The addition operator +.

Re-exported from core::ops:: .

The addition operator +.

Note that Rhs is Self by default, but this is not mandatory. For example, std::time::SystemTime implements Add<Duration>, which permits operations of the form SystemTime = SystemTime + Duration.

§Examples

§`Add`able points

use std::ops::Add;

#[derive(Debug, Copy, Clone, PartialEq)]
struct Point {
    x: i32,
    y: i32,
}

impl Add for Point {
    type Output = Self;

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

assert_eq!(Point { x: 1, y: 0 } + Point { x: 2, y: 3 },
           Point { x: 3, y: 3 });

§Implementing `Add` with generics

Here is an example of the same Point struct implementing the Add trait using generics.

use std::ops::Add;

#[derive(Debug, Copy, Clone, PartialEq)]
struct Point<T> {
    x: T,
    y: T,
}

// Notice that the implementation uses the associated type `Output`.
impl<T: Add<Output = T>> Add for Point<T> {
    type Output = Self;

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

assert_eq!(Point { x: 1, y: 0 } + Point { x: 2, y: 3 },
           Point { x: 3, y: 3 });

Concatenating two Strings takes the first by value and borrows the second:

let a = String::from("hello");
let b = String::from(" world");
let c = a + &b;
// `a` is moved and can no longer be used here.

If you want to keep using the first String, you can clone it and append to the clone instead:

let a = String::from("hello");
let b = String::from(" world");
let c = a.clone() + &b;
// `a` is still valid here.

Concatenating &str slices can be done by converting the first to a String:

let a = "hello";
let b = " world";
let c = a.to_string() + b;

Source §

impl Add<u32> for Int<u32>

Adds a signed duration of time to a zoned datetime.

This uses checked arithmetic and panics on overflow. To handle overflow without panics, use Zoned::checked_add.

§

type Output = Zoned

§

impl<'a> Add for &'a Zoned

Adds a span of time to a zoned datetime.

This uses checked arithmetic and panics on overflow. To handle overflow without panics, use Zoned::checked_add.

The string on the right-hand side is only borrowed; its contents are copied into the returned String<'bump>.

§Examples

Concatenating two String<'bump>s takes the first by value and borrows the second:

use bumpalo::{Bump, collections::String};

let bump = Bump::new();

let a = String::from_str_in("hello", &bump);
let b = String::from_str_in(" world", &bump);
let c = a + &b;
// `a` is moved and can no longer be used here.

If you want to keep using the first String, you can clone it and append to the clone instead:

use bumpalo::{Bump, collections::String};

let bump = Bump::new();

let a = String::from_str_in("hello", &bump);
let b = String::from_str_in(" world", &bump);
let c = a.clone() + &b;
// `a` is still valid here.

Concatenating &str slices can be done by converting the first to a String:

use bumpalo::{Bump, collections::String};

let bump = Bump::new();

let a = "hello";
let b = " world";
let c = String::from_str_in(a, &bump) + b;

§

type Output = String<'bump>

Source §

Source §

Trait AddCopy item path

§Examples

§Addable points

§Implementing Add with generics

Required Associated Types§

type Output

Required Methods§

const fn add(self, rhs: Rhs) -> Self::Output

§Example

Implementors§

impl Add for &JsValue

type Output = JsValue

impl Add for f16

type Output = f16

impl Add for f32

type Output = f32

impl Add for f64

type Output = f64

impl Add for f128

type Output = f128

impl Add for i8

type Output = i8

impl Add for i16

type Output = i16

impl Add for i32

type Output = i32

impl Add for i64

type Output = i64

impl Add for i128

type Output = i128

impl Add for isize

type Output = isize

impl Add for u8

type Output = u8

impl Add for u16

type Output = u16

impl Add for u32

type Output = u32

impl Add for u64

type Output = u64

impl Add for u128

type Output = u128

impl Add for usize

type Output = usize

impl Add for Assume

type Output = Assume

impl Add for Ticks

type Output = Ticks

impl Add for SignedDuration

type Output = SignedDuration

impl Add for BigInt

type Output = <&'static BigInt as Add>::Output

impl Add for Number

type Output = <&'static Number as Add>::Output

impl Add for Decibels

type Output = Decibels

impl Add for Frame

type Output = Frame

impl Add for Mix

type Output = Mix

impl Add for Panning

type Output = Panning

impl Add for PlaybackRate

type Output = PlaybackRate

impl Add for Semitones

type Output = Semitones

impl Add for I24

type Output = I24

impl Add for I48

type Output = I48

impl Add for U24

type Output = U24

impl Add for U48

type Output = U48

impl Add for FPoint

type Output = FPoint

impl Add for devela::_dep::sdl2::rect::Point

type Output = Point

impl Add for devela::_dep::sdl3::rect::Point

type Output = Point

Trait Add

§`Add`able points

§Implementing `Add` with generics