referrerpolicy=no-referrer-when-downgrade
sp_std::ops

Trait 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 });

§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 });

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);

Implementors§

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impl Add for f16

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impl Add for f32

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impl Add for f64

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impl Add for f128

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impl Add for i8

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impl Add for i16

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impl Add for i32

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impl Add for i64

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impl Add for i128

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impl Add for isize

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impl Add for u8

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impl Add for u16

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impl Add for u32

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impl Add for u64

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impl Add for 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<&f16> for &f16

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impl Add<&f16> for f16

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impl Add<&f32> for &f32

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impl Add<&f32> for f32

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impl Add<&f64> for &f64

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impl Add<&f64> for f64

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impl Add<&f128> for &f128

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impl Add<&f128> for f128

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impl Add<&i8> for &i8

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impl Add<&i8> for i8

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impl Add<&i16> for &i16

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impl Add<&i16> for i16

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impl Add<&i32> for &i32

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impl Add<&i32> for i32

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impl Add<&i64> for &i64

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impl Add<&i64> for i64

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impl Add<&i128> for &i128

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impl Add<&i128> for i128

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impl Add<&isize> for &isize

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impl Add<&isize> for isize

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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.

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;
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impl Add<&u8> for &u8

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impl Add<&u8> for u8

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impl Add<&u16> for &u16

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impl Add<&u16> for u16

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impl Add<&u32> for &u32

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impl Add<&u32> for u32

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impl Add<&u64> for &u64

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impl Add<&u64> for u64

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impl Add<&u128> for &u128

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impl Add<&u128> for u128

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impl Add<&usize> for &usize

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impl Add<&usize> for usize

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

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

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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<f16> for &'a f16

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

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

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impl<'a> Add<f128> for &'a f128

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

impl Add for CountBound

impl Add for SizeBound

impl Add<u32> for Id

impl Add for BigUint

impl Add for FixedI128

impl Add for FixedI64

impl Add for FixedU128

impl Add for FixedU64

impl Add for PerU16

impl Add for Perbill

impl Add for Percent

impl Add for Permill

impl Add for Perquintill

impl Add for Slot

impl Add<u64> for Slot

impl<T: Add<Output = T>, D: Get<T>> Add for TypeWithDefault<T, D>

impl Add for Timestamp

impl Add<u64> for Timestamp

impl Add for Weight