# Trait std::ops::Add
1.0.0[−][src]

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

### `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 });

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

## 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

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### impl Add<f32> for f32

#### type Output = f32

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### impl Add<f64> for f64

#### type Output = f64

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### impl Add<i8> for i8

#### type Output = i8

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### impl Add<i16> for i16

#### type Output = i16

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### impl Add<i32> for i32

#### type Output = i32

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### impl Add<i64> for i64

#### type Output = i64

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### impl Add<i128> for i128

#### type Output = i128

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### impl Add<isize> for isize

#### type Output = isize

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### impl Add<u8> for u8

#### type Output = u8

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### impl Add<u16> for u16

#### type Output = u16

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### impl Add<u32> for u32

#### type Output = u32

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### impl Add<u64> for u64

#### type Output = u64

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### impl Add<u128> for u128

#### type Output = u128

[src]

### impl Add<usize> for usize

#### type Output = usize

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### impl Add<Saturating<i8>> for Saturating<i8>

#### type Output = Saturating<i8>

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### impl Add<Saturating<i16>> for Saturating<i16>

#### type Output = Saturating<i16>

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### impl Add<Saturating<i32>> for Saturating<i32>

#### type Output = Saturating<i32>

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### impl Add<Saturating<i64>> for Saturating<i64>

#### type Output = Saturating<i64>

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### impl Add<Saturating<i128>> for Saturating<i128>

#### type Output = Saturating<i128>

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### impl Add<Saturating<isize>> for Saturating<isize>

#### type Output = Saturating<isize>

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### impl Add<Saturating<u8>> for Saturating<u8>

#### type Output = Saturating<u8>

[src]

### impl Add<Saturating<u16>> for Saturating<u16>

#### type Output = Saturating<u16>

[src]

### impl Add<Saturating<u32>> for Saturating<u32>

#### type Output = Saturating<u32>

[src]

### impl Add<Saturating<u64>> for Saturating<u64>

#### type Output = Saturating<u64>

[src]

### impl Add<Saturating<u128>> for Saturating<u128>

#### type Output = Saturating<u128>

[src]

### impl Add<Saturating<usize>> for Saturating<usize>

#### type Output = Saturating<usize>

[src]

### impl Add<Wrapping<i8>> for Wrapping<i8>

#### type Output = Wrapping<i8>

[src]

### impl Add<Wrapping<i16>> for Wrapping<i16>

#### type Output = Wrapping<i16>

[src]

### impl Add<Wrapping<i32>> for Wrapping<i32>

#### type Output = Wrapping<i32>

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### impl Add<Wrapping<i64>> for Wrapping<i64>

#### type Output = Wrapping<i64>

[src]

### impl Add<Wrapping<i128>> for Wrapping<i128>

#### type Output = Wrapping<i128>

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### impl Add<Wrapping<isize>> for Wrapping<isize>

#### type Output = Wrapping<isize>

[src]

### impl Add<Wrapping<u8>> for Wrapping<u8>

#### type Output = Wrapping<u8>

[src]

### impl Add<Wrapping<u16>> for Wrapping<u16>

#### type Output = Wrapping<u16>

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### impl Add<Wrapping<u32>> for Wrapping<u32>

#### type Output = Wrapping<u32>

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### impl Add<Wrapping<u64>> for Wrapping<u64>

#### type Output = Wrapping<u64>

[src]

### impl Add<Wrapping<u128>> for Wrapping<u128>

#### type Output = Wrapping<u128>

[src]

### impl Add<Wrapping<usize>> for Wrapping<usize>

#### type Output = Wrapping<usize>

1.3.0[src]

### impl Add<Duration> for Duration

#### type Output = Duration

1.8.0[src]

### impl Add<Duration> for Instant

#### type Output = Instant

1.8.0[src]

### impl Add<Duration> for SystemTime

#### type Output = SystemTime

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### impl<'_> Add<&'_ f32> for f32

#### type Output = <f32 as Add<f32>>::Output

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### impl<'_> Add<&'_ f64> for f64

#### type Output = <f64 as Add<f64>>::Output

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### impl<'_> Add<&'_ i8> for i8

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

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### impl<'_> Add<&'_ i16> for i16

#### type Output = <i16 as Add<i16>>::Output

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### impl<'_> Add<&'_ i32> for i32

#### type Output = <i32 as Add<i32>>::Output

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### impl<'_> Add<&'_ i64> for i64

#### type Output = <i64 as Add<i64>>::Output

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### impl<'_> Add<&'_ i128> for i128

#### type Output = <i128 as Add<i128>>::Output

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### impl<'_> Add<&'_ isize> for isize

#### type Output = <isize as Add<isize>>::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 `String`s 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

#### type Output = String

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### impl<'_> Add<&'_ u8> for u8

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

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### impl<'_> Add<&'_ u16> for u16

#### type Output = <u16 as Add<u16>>::Output

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### impl<'_> Add<&'_ u32> for u32

#### type Output = <u32 as Add<u32>>::Output

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### impl<'_> Add<&'_ u64> for u64

#### type Output = <u64 as Add<u64>>::Output

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### impl<'_> Add<&'_ u128> for u128

#### type Output = <u128 as Add<u128>>::Output

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### impl<'_> Add<&'_ usize> for usize

#### type Output = <usize as Add<usize>>::Output

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### impl<'_> Add<&'_ Saturating<i8>> for Saturating<i8>

#### type Output = <Saturating<i8> as Add<Saturating<i8>>>::Output

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### impl<'_> Add<&'_ Saturating<i16>> for Saturating<i16>

#### type Output = <Saturating<i16> as Add<Saturating<i16>>>::Output

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### impl<'_> Add<&'_ Saturating<i32>> for Saturating<i32>

#### type Output = <Saturating<i32> as Add<Saturating<i32>>>::Output

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### impl<'_> Add<&'_ Saturating<i64>> for Saturating<i64>

#### type Output = <Saturating<i64> as Add<Saturating<i64>>>::Output

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### impl<'_> Add<&'_ Saturating<i128>> for Saturating<i128>

#### type Output = <Saturating<i128> as Add<Saturating<i128>>>::Output

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### impl<'_> Add<&'_ Saturating<isize>> for Saturating<isize>

#### type Output = <Saturating<isize> as Add<Saturating<isize>>>::Output

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### impl<'_> Add<&'_ Saturating<u8>> for Saturating<u8>

#### type Output = <Saturating<u8> as Add<Saturating<u8>>>::Output

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### impl<'_> Add<&'_ Saturating<u16>> for Saturating<u16>

#### type Output = <Saturating<u16> as Add<Saturating<u16>>>::Output

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### impl<'_> Add<&'_ Saturating<u32>> for Saturating<u32>

#### type Output = <Saturating<u32> as Add<Saturating<u32>>>::Output

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### impl<'_> Add<&'_ Saturating<u64>> for Saturating<u64>

#### type Output = <Saturating<u64> as Add<Saturating<u64>>>::Output

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### impl<'_> Add<&'_ Saturating<u128>> for Saturating<u128>

#### type Output = <Saturating<u128> as Add<Saturating<u128>>>::Output

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### impl<'_> Add<&'_ Saturating<usize>> for Saturating<usize>

#### type Output = <Saturating<usize> as Add<Saturating<usize>>>::Output

1.14.0[src]

### impl<'_> Add<&'_ Wrapping<i8>> for Wrapping<i8>

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

1.14.0[src]

### impl<'_> Add<&'_ Wrapping<i16>> for Wrapping<i16>

#### type Output = <Wrapping<i16> as Add<Wrapping<i16>>>::Output

1.14.0[src]

### impl<'_> Add<&'_ Wrapping<i32>> for Wrapping<i32>

#### type Output = <Wrapping<i32> as Add<Wrapping<i32>>>::Output

1.14.0[src]

### impl<'_> Add<&'_ Wrapping<i64>> for Wrapping<i64>

#### type Output = <Wrapping<i64> as Add<Wrapping<i64>>>::Output

1.14.0[src]

### impl<'_> Add<&'_ Wrapping<i128>> for Wrapping<i128>

#### type Output = <Wrapping<i128> as Add<Wrapping<i128>>>::Output

1.14.0[src]

### impl<'_> Add<&'_ Wrapping<isize>> for Wrapping<isize>

#### type Output = <Wrapping<isize> as Add<Wrapping<isize>>>::Output

1.14.0[src]

### impl<'_> Add<&'_ Wrapping<u8>> for Wrapping<u8>

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

1.14.0[src]

### impl<'_> Add<&'_ Wrapping<u16>> for Wrapping<u16>

#### type Output = <Wrapping<u16> as Add<Wrapping<u16>>>::Output

1.14.0[src]

### impl<'_> Add<&'_ Wrapping<u32>> for Wrapping<u32>

#### type Output = <Wrapping<u32> as Add<Wrapping<u32>>>::Output

1.14.0[src]

### impl<'_> Add<&'_ Wrapping<u64>> for Wrapping<u64>

#### type Output = <Wrapping<u64> as Add<Wrapping<u64>>>::Output

1.14.0[src]

### impl<'_> Add<&'_ Wrapping<u128>> for Wrapping<u128>

#### type Output = <Wrapping<u128> as Add<Wrapping<u128>>>::Output

1.14.0[src]

### impl<'_> Add<&'_ Wrapping<usize>> for Wrapping<usize>

#### type Output = <Wrapping<usize> as Add<Wrapping<usize>>>::Output

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### impl<'_, '_> Add<&'_ f32> for &'_ f32

#### type Output = <f32 as Add<f32>>::Output

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### impl<'_, '_> Add<&'_ f64> for &'_ f64

#### type Output = <f64 as Add<f64>>::Output

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### impl<'_, '_> Add<&'_ i8> for &'_ i8

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

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### impl<'_, '_> Add<&'_ i16> for &'_ i16

#### type Output = <i16 as Add<i16>>::Output

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### impl<'_, '_> Add<&'_ i32> for &'_ i32

#### type Output = <i32 as Add<i32>>::Output

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### impl<'_, '_> Add<&'_ i64> for &'_ i64

#### type Output = <i64 as Add<i64>>::Output

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### impl<'_, '_> Add<&'_ i128> for &'_ i128

#### type Output = <i128 as Add<i128>>::Output

[src]

### impl<'_, '_> Add<&'_ isize> for &'_ isize

#### type Output = <isize as Add<isize>>::Output

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### impl<'_, '_> Add<&'_ u8> for &'_ u8

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

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### impl<'_, '_> Add<&'_ u16> for &'_ u16

#### type Output = <u16 as Add<u16>>::Output

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### impl<'_, '_> Add<&'_ u32> for &'_ u32

#### type Output = <u32 as Add<u32>>::Output

[src]

### impl<'_, '_> Add<&'_ u64> for &'_ u64

#### type Output = <u64 as Add<u64>>::Output

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### impl<'_, '_> Add<&'_ u128> for &'_ u128

#### type Output = <u128 as Add<u128>>::Output

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### impl<'_, '_> Add<&'_ usize> for &'_ usize

#### type Output = <usize as Add<usize>>::Output

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### impl<'_, '_> Add<&'_ Saturating<i8>> for &'_ Saturating<i8>

#### type Output = <Saturating<i8> as Add<Saturating<i8>>>::Output

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### impl<'_, '_> Add<&'_ Saturating<i16>> for &'_ Saturating<i16>

#### type Output = <Saturating<i16> as Add<Saturating<i16>>>::Output

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### impl<'_, '_> Add<&'_ Saturating<i32>> for &'_ Saturating<i32>

#### type Output = <Saturating<i32> as Add<Saturating<i32>>>::Output

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### impl<'_, '_> Add<&'_ Saturating<i64>> for &'_ Saturating<i64>

#### type Output = <Saturating<i64> as Add<Saturating<i64>>>::Output

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### impl<'_, '_> Add<&'_ Saturating<i128>> for &'_ Saturating<i128>

#### type Output = <Saturating<i128> as Add<Saturating<i128>>>::Output

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### impl<'_, '_> Add<&'_ Saturating<isize>> for &'_ Saturating<isize>

#### type Output = <Saturating<isize> as Add<Saturating<isize>>>::Output

[src]

### impl<'_, '_> Add<&'_ Saturating<u8>> for &'_ Saturating<u8>

#### type Output = <Saturating<u8> as Add<Saturating<u8>>>::Output

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### impl<'_, '_> Add<&'_ Saturating<u16>> for &'_ Saturating<u16>

#### type Output = <Saturating<u16> as Add<Saturating<u16>>>::Output

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### impl<'_, '_> Add<&'_ Saturating<u32>> for &'_ Saturating<u32>

#### type Output = <Saturating<u32> as Add<Saturating<u32>>>::Output

[src]

### impl<'_, '_> Add<&'_ Saturating<u64>> for &'_ Saturating<u64>

#### type Output = <Saturating<u64> as Add<Saturating<u64>>>::Output

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### impl<'_, '_> Add<&'_ Saturating<u128>> for &'_ Saturating<u128>

#### type Output = <Saturating<u128> as Add<Saturating<u128>>>::Output

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### impl<'_, '_> Add<&'_ Saturating<usize>> for &'_ Saturating<usize>

#### type Output = <Saturating<usize> as Add<Saturating<usize>>>::Output

1.14.0[src]

### impl<'_, '_> Add<&'_ Wrapping<i8>> for &'_ Wrapping<i8>

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

1.14.0[src]

### impl<'_, '_> Add<&'_ Wrapping<i16>> for &'_ Wrapping<i16>

#### type Output = <Wrapping<i16> as Add<Wrapping<i16>>>::Output

1.14.0[src]

### impl<'_, '_> Add<&'_ Wrapping<i32>> for &'_ Wrapping<i32>

#### type Output = <Wrapping<i32> as Add<Wrapping<i32>>>::Output

1.14.0[src]

### impl<'_, '_> Add<&'_ Wrapping<i64>> for &'_ Wrapping<i64>

#### type Output = <Wrapping<i64> as Add<Wrapping<i64>>>::Output

1.14.0[src]

### impl<'_, '_> Add<&'_ Wrapping<i128>> for &'_ Wrapping<i128>

#### type Output = <Wrapping<i128> as Add<Wrapping<i128>>>::Output

1.14.0[src]

### impl<'_, '_> Add<&'_ Wrapping<isize>> for &'_ Wrapping<isize>

#### type Output = <Wrapping<isize> as Add<Wrapping<isize>>>::Output

1.14.0[src]

### impl<'_, '_> Add<&'_ Wrapping<u8>> for &'_ Wrapping<u8>

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

1.14.0[src]

### impl<'_, '_> Add<&'_ Wrapping<u16>> for &'_ Wrapping<u16>

#### type Output = <Wrapping<u16> as Add<Wrapping<u16>>>::Output

1.14.0[src]

### impl<'_, '_> Add<&'_ Wrapping<u32>> for &'_ Wrapping<u32>

#### type Output = <Wrapping<u32> as Add<Wrapping<u32>>>::Output

1.14.0[src]

### impl<'_, '_> Add<&'_ Wrapping<u64>> for &'_ Wrapping<u64>

#### type Output = <Wrapping<u64> as Add<Wrapping<u64>>>::Output

1.14.0[src]

### impl<'_, '_> Add<&'_ Wrapping<u128>> for &'_ Wrapping<u128>

#### type Output = <Wrapping<u128> as Add<Wrapping<u128>>>::Output

1.14.0[src]

### impl<'_, '_> Add<&'_ Wrapping<usize>> for &'_ Wrapping<usize>

#### type Output = <Wrapping<usize> as Add<Wrapping<usize>>>::Output

1.14.0[src]

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

#### type Output = Cow<'a, str>

1.14.0[src]

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

#### type Output = Cow<'a, str>

[src]

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

#### type Output = <f32 as Add<f32>>::Output

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

#### type Output = <f64 as Add<f64>>::Output

[src]

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

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

[src]

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

#### type Output = <i16 as Add<i16>>::Output

[src]

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

#### type Output = <i32 as Add<i32>>::Output

[src]

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

#### type Output = <i64 as Add<i64>>::Output

[src]

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

#### type Output = <i128 as Add<i128>>::Output

[src]

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

#### type Output = <isize as Add<isize>>::Output

[src]

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

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

[src]

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

#### type Output = <u16 as Add<u16>>::Output

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

#### type Output = <u32 as Add<u32>>::Output

[src]

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

#### type Output = <u64 as Add<u64>>::Output

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

#### type Output = <u128 as Add<u128>>::Output

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

#### type Output = <usize as Add<usize>>::Output

[src]

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

#### type Output = <Saturating<i8> as Add<Saturating<i8>>>::Output

[src]

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

#### type Output = <Saturating<i16> as Add<Saturating<i16>>>::Output

[src]

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

#### type Output = <Saturating<i32> as Add<Saturating<i32>>>::Output

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

#### type Output = <Saturating<i64> as Add<Saturating<i64>>>::Output

[src]

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

#### type Output = <Saturating<i128> as Add<Saturating<i128>>>::Output

[src]

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

#### type Output = <Saturating<isize> as Add<Saturating<isize>>>::Output

[src]

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

#### type Output = <Saturating<u8> as Add<Saturating<u8>>>::Output

[src]

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

#### type Output = <Saturating<u16> as Add<Saturating<u16>>>::Output

[src]

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

#### type Output = <Saturating<u32> as Add<Saturating<u32>>>::Output

[src]

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

#### type Output = <Saturating<u64> as Add<Saturating<u64>>>::Output

[src]

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

#### type Output = <Saturating<u128> as Add<Saturating<u128>>>::Output

[src]

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

#### type Output = <Saturating<usize> as Add<Saturating<usize>>>::Output

1.14.0[src]

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

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

1.14.0[src]

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

#### type Output = <Wrapping<i16> as Add<Wrapping<i16>>>::Output

1.14.0[src]

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

#### type Output = <Wrapping<i32> as Add<Wrapping<i32>>>::Output

1.14.0[src]

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

#### type Output = <Wrapping<i64> as Add<Wrapping<i64>>>::Output

1.14.0[src]

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

#### type Output = <Wrapping<i128> as Add<Wrapping<i128>>>::Output

1.14.0[src]

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

#### type Output = <Wrapping<isize> as Add<Wrapping<isize>>>::Output

1.14.0[src]

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

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

1.14.0[src]

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

#### type Output = <Wrapping<u16> as Add<Wrapping<u16>>>::Output

1.14.0[src]

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

#### type Output = <Wrapping<u32> as Add<Wrapping<u32>>>::Output

1.14.0[src]

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

#### type Output = <Wrapping<u64> as Add<Wrapping<u64>>>::Output

1.14.0[src]

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

#### type Output = <Wrapping<u128> as Add<Wrapping<u128>>>::Output

1.14.0[src]

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

#### type Output = <Wrapping<usize> as Add<Wrapping<usize>>>::Output