Trait std::ops::Add

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

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

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

§Addable 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 });
Run

§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 });
Run

Required Associated Types§

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type Output

The resulting type after applying the + operator.

Required Methods§

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

Performs the + operation.

§Example
assert_eq!(12 + 1, 13);
Run

Implementors§

const: unstable · source§

impl Add for f32

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type Output = f32

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impl Add for f64

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type Output = f64

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impl Add for i8

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type Output = i8

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impl Add for i16

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type Output = i16

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impl Add for i32

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type Output = i32

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impl Add for i64

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type Output = i64

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impl Add for i128

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type Output = i128

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impl Add for isize

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impl Add for u8

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type Output = u8

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impl Add for u16

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type Output = u16

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impl Add for u32

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type Output = u32

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impl Add for u64

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type Output = u64

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impl Add for u128

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type Output = u128

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impl Add for usize

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impl Add for Assume

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impl Add for Saturating<i8>

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impl Add for Saturating<i16>

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impl Add for Saturating<i32>

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impl Add for Saturating<i64>

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impl Add for Saturating<i128>

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impl Add for Saturating<isize>

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impl Add for Saturating<u8>

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impl Add for Saturating<u16>

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impl Add for Saturating<u32>

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impl Add for Saturating<u64>

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impl Add for Saturating<u128>

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impl Add for Saturating<usize>

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impl Add for Wrapping<i8>

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impl Add for Wrapping<i16>

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impl Add for Wrapping<i32>

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impl Add for Wrapping<i64>

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impl Add for Wrapping<i128>

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impl Add for Wrapping<isize>

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impl Add for Wrapping<u8>

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impl Add for Wrapping<u16>

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impl Add for Wrapping<u32>

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impl Add for Wrapping<u64>

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impl Add for Wrapping<u128>

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impl Add for Wrapping<usize>

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impl Add for Duration

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impl Add<&f32> for &f32

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type Output = <f32 as Add>::Output

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impl Add<&f32> for f32

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type Output = <f32 as Add>::Output

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impl Add<&f64> for &f64

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type Output = <f64 as Add>::Output

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impl Add<&f64> for f64

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type Output = <f64 as Add>::Output

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impl Add<&i8> for &i8

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type Output = <i8 as Add>::Output

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impl Add<&i8> for i8

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type Output = <i8 as Add>::Output

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impl Add<&i16> for &i16

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type Output = <i16 as Add>::Output

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impl Add<&i16> for i16

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type Output = <i16 as Add>::Output

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impl Add<&i32> for &i32

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type Output = <i32 as Add>::Output

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impl Add<&i32> for i32

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type Output = <i32 as Add>::Output

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impl Add<&i64> for &i64

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type Output = <i64 as Add>::Output

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impl Add<&i64> for i64

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type Output = <i64 as Add>::Output

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impl Add<&i128> for &i128

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type Output = <i128 as Add>::Output

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impl Add<&i128> for i128

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type Output = <i128 as Add>::Output

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impl Add<&isize> for &isize

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type Output = <isize as Add>::Output

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impl Add<&isize> for isize

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type Output = <isize as Add>::Output

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impl Add<&str> for String

Implements the + operator for concatenating two strings.

This consumes the String on the left-hand side and re-uses its buffer (growing it if necessary). This is done to avoid allocating a new String and copying the entire contents on every operation, which would lead to O(n^2) running time when building an n-byte string by repeated concatenation.

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

§Examples

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.
Run

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.
Run

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;
Run
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impl Add<&u8> for &u8

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type Output = <u8 as Add>::Output

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impl Add<&u8> for u8

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type Output = <u8 as Add>::Output

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impl Add<&u16> for &u16

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type Output = <u16 as Add>::Output

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impl Add<&u16> for u16

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type Output = <u16 as Add>::Output

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impl Add<&u32> for &u32

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type Output = <u32 as Add>::Output

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impl Add<&u32> for u32

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type Output = <u32 as Add>::Output

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impl Add<&u64> for &u64

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type Output = <u64 as Add>::Output

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impl Add<&u64> for u64

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type Output = <u64 as Add>::Output

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impl Add<&u128> for &u128

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type Output = <u128 as Add>::Output

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impl Add<&u128> for u128

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type Output = <u128 as Add>::Output

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impl Add<&usize> for &usize

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type Output = <usize as Add>::Output

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impl Add<&usize> for usize

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type Output = <usize as Add>::Output

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impl Add<&Saturating<i8>> for &Saturating<i8>

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impl Add<&Saturating<i8>> for Saturating<i8>

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impl Add<&Saturating<i16>> for &Saturating<i16>

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impl Add<&Saturating<i16>> for Saturating<i16>

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impl Add<&Saturating<i32>> for &Saturating<i32>

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impl Add<&Saturating<i32>> for Saturating<i32>

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impl Add<&Saturating<i64>> for &Saturating<i64>

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impl Add<&Saturating<i64>> for Saturating<i64>

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impl Add<&Saturating<i128>> for &Saturating<i128>

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impl Add<&Saturating<i128>> for Saturating<i128>

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impl Add<&Saturating<isize>> for &Saturating<isize>

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impl Add<&Saturating<isize>> for Saturating<isize>

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impl Add<&Saturating<u8>> for &Saturating<u8>

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impl Add<&Saturating<u8>> for Saturating<u8>

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impl Add<&Saturating<u16>> for &Saturating<u16>

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impl Add<&Saturating<u16>> for Saturating<u16>

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impl Add<&Saturating<u32>> for &Saturating<u32>

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impl Add<&Saturating<u32>> for Saturating<u32>

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impl Add<&Saturating<u64>> for &Saturating<u64>

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impl Add<&Saturating<u64>> for Saturating<u64>

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impl Add<&Saturating<u128>> for &Saturating<u128>

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impl Add<&Saturating<u128>> for Saturating<u128>

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impl Add<&Saturating<usize>> for &Saturating<usize>

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impl Add<&Saturating<usize>> for Saturating<usize>

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impl Add<&Wrapping<i8>> for &Wrapping<i8>

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type Output = <Wrapping<i8> as Add>::Output

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impl Add<&Wrapping<i8>> for Wrapping<i8>

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type Output = <Wrapping<i8> as Add>::Output

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impl Add<&Wrapping<i16>> for &Wrapping<i16>

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impl Add<&Wrapping<i16>> for Wrapping<i16>

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impl Add<&Wrapping<i32>> for &Wrapping<i32>

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impl Add<&Wrapping<i32>> for Wrapping<i32>

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impl Add<&Wrapping<i64>> for &Wrapping<i64>

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impl Add<&Wrapping<i64>> for Wrapping<i64>

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impl Add<&Wrapping<i128>> for &Wrapping<i128>

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impl Add<&Wrapping<i128>> for Wrapping<i128>

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impl Add<&Wrapping<isize>> for &Wrapping<isize>

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impl Add<&Wrapping<isize>> for Wrapping<isize>

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impl Add<&Wrapping<u8>> for &Wrapping<u8>

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type Output = <Wrapping<u8> as Add>::Output

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impl Add<&Wrapping<u8>> for Wrapping<u8>

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type Output = <Wrapping<u8> as Add>::Output

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impl Add<&Wrapping<u16>> for &Wrapping<u16>

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impl Add<&Wrapping<u16>> for Wrapping<u16>

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impl Add<&Wrapping<u32>> for &Wrapping<u32>

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impl Add<&Wrapping<u32>> for Wrapping<u32>

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impl Add<&Wrapping<u64>> for &Wrapping<u64>

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impl Add<&Wrapping<u64>> for Wrapping<u64>

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impl Add<&Wrapping<u128>> for &Wrapping<u128>

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impl Add<&Wrapping<u128>> for Wrapping<u128>

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impl Add<&Wrapping<usize>> for &Wrapping<usize>

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impl Add<&Wrapping<usize>> for Wrapping<usize>

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impl Add<Duration> for Instant

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impl Add<Duration> for SystemTime

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impl<'a> Add for Cow<'a, str>

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type Output = Cow<'a, str>

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impl<'a> Add<&'a str> for Cow<'a, str>

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type Output = Cow<'a, str>

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impl<'a> Add<f32> for &'a f32

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type Output = <f32 as Add>::Output

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impl<'a> Add<f64> for &'a f64

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type Output = <f64 as Add>::Output

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impl<'a> Add<i8> for &'a i8

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type Output = <i8 as Add>::Output

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impl<'a> Add<i16> for &'a i16

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type Output = <i16 as Add>::Output

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impl<'a> Add<i32> for &'a i32

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type Output = <i32 as Add>::Output

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impl<'a> Add<i64> for &'a i64

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type Output = <i64 as Add>::Output

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impl<'a> Add<i128> for &'a i128

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type Output = <i128 as Add>::Output

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impl<'a> Add<isize> for &'a isize

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type Output = <isize as Add>::Output

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impl<'a> Add<u8> for &'a u8

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type Output = <u8 as Add>::Output

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impl<'a> Add<u16> for &'a u16

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type Output = <u16 as Add>::Output

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impl<'a> Add<u32> for &'a u32

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type Output = <u32 as Add>::Output

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impl<'a> Add<u64> for &'a u64

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type Output = <u64 as Add>::Output

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impl<'a> Add<u128> for &'a u128

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type Output = <u128 as Add>::Output

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impl<'a> Add<usize> for &'a usize

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type Output = <usize as Add>::Output

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impl<'a> Add<Saturating<i8>> for &'a Saturating<i8>

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impl<'a> Add<Saturating<i16>> for &'a Saturating<i16>

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impl<'a> Add<Saturating<i32>> for &'a Saturating<i32>

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impl<'a> Add<Saturating<i64>> for &'a Saturating<i64>

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impl<'a> Add<Saturating<i128>> for &'a Saturating<i128>

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impl<'a> Add<Saturating<isize>> for &'a Saturating<isize>

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impl<'a> Add<Saturating<u8>> for &'a Saturating<u8>

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impl<'a> Add<Saturating<u16>> for &'a Saturating<u16>

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impl<'a> Add<Saturating<u32>> for &'a Saturating<u32>

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impl<'a> Add<Saturating<u64>> for &'a Saturating<u64>

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impl<'a> Add<Saturating<u128>> for &'a Saturating<u128>

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impl<'a> Add<Saturating<usize>> for &'a Saturating<usize>

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impl<'a> Add<Wrapping<i8>> for &'a Wrapping<i8>

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type Output = <Wrapping<i8> as Add>::Output

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impl<'a> Add<Wrapping<i16>> for &'a Wrapping<i16>

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impl<'a> Add<Wrapping<i32>> for &'a Wrapping<i32>

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impl<'a> Add<Wrapping<i64>> for &'a Wrapping<i64>

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impl<'a> Add<Wrapping<i128>> for &'a Wrapping<i128>

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impl<'a> Add<Wrapping<isize>> for &'a Wrapping<isize>

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impl<'a> Add<Wrapping<u8>> for &'a Wrapping<u8>

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type Output = <Wrapping<u8> as Add>::Output

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impl<'a> Add<Wrapping<u16>> for &'a Wrapping<u16>

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impl<'a> Add<Wrapping<u32>> for &'a Wrapping<u32>

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impl<'a> Add<Wrapping<u64>> for &'a Wrapping<u64>

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impl<'a> Add<Wrapping<u128>> for &'a Wrapping<u128>

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impl<'a> Add<Wrapping<usize>> for &'a Wrapping<usize>

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impl<'lhs, 'rhs, T, const N: usize> Add<&'rhs Simd<T, N>> for &'lhs Simd<T, N>
where T: SimdElement, Simd<T, N>: Add<Output = Simd<T, N>>, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<T, N>

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impl<T, const N: usize> Add<&Simd<T, N>> for Simd<T, N>
where T: SimdElement, Simd<T, N>: Add<Output = Simd<T, N>>, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<T, N>

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impl<T, const N: usize> Add<Simd<T, N>> for &Simd<T, N>
where T: SimdElement, Simd<T, N>: Add<Output = Simd<T, N>>, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<T, N>

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impl<const N: usize> Add for Simd<f32, N>

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type Output = Simd<f32, N>

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impl<const N: usize> Add for Simd<f64, N>

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type Output = Simd<f64, N>

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impl<const N: usize> Add for Simd<i8, N>

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type Output = Simd<i8, N>

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impl<const N: usize> Add for Simd<i16, N>

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type Output = Simd<i16, N>

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impl<const N: usize> Add for Simd<i32, N>

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type Output = Simd<i32, N>

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impl<const N: usize> Add for Simd<i64, N>

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type Output = Simd<i64, N>

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impl<const N: usize> Add for Simd<isize, N>

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type Output = Simd<isize, N>

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impl<const N: usize> Add for Simd<u8, N>

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type Output = Simd<u8, N>

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impl<const N: usize> Add for Simd<u16, N>

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type Output = Simd<u16, N>

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impl<const N: usize> Add for Simd<u32, N>

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type Output = Simd<u32, N>

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impl<const N: usize> Add for Simd<u64, N>

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type Output = Simd<u64, N>

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impl<const N: usize> Add for Simd<usize, N>

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type Output = Simd<usize, N>