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

加法运算符 +

请注意,默认情况下 RhsSelf,但这不是强制性的。 例如,std::time::SystemTime 实现 Add<Duration>,它允许以 SystemTime = SystemTime + Duration 形式进行操作。

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

使用泛型实现 Add

这是使用泛型实现 Add trait 的同一 Point 结构体的示例。

use std::ops::Add;

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

// 请注意,该实现使用关联类型 `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

应用 + 运算符后的结果类型。

Required Methods§

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

执行 + 操作。

Example
assert_eq!(12 + 1, 13);
Run

Implementors§

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impl Add<&f32> for &f32

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

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impl Add<&f32> for f32

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

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impl Add<&f64> for &f64

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

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impl Add<&f64> for f64

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

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impl Add<&i8> for &i8

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

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impl Add<&i8> for i8

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

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impl Add<&i16> for &i16

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

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impl Add<&i16> for i16

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

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impl Add<&i32> for &i32

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

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impl Add<&i32> for i32

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

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impl Add<&i64> for &i64

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

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impl Add<&i64> for i64

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

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impl Add<&i128> for &i128

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

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impl Add<&i128> for i128

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

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impl Add<&isize> for &isize

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

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impl Add<&isize> for isize

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

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impl Add<&str> for String

实现 + 运算符以连接两个字符串。

这会消费左侧的 String,并重新使用其缓冲区 (如有必要,请增加缓冲区)。 这样做是为了避免分配新的 String 并在每个操作上复制整个内容,当通过重复连接构建 n 字节的字符串时,这将导致 O(n^ 2) 运行时间。

右侧的字符串仅是借用的。它的内容被复制到返回的 String 中。

Examples

将两个 String 连接起来,第一个按值取值,第二个借用:

let a = String::from("hello");
let b = String::from(" world");
let c = a + &b;
// `a` 已移动,不能再在此处使用。
Run

如果要继续使用第一个 String,则可以对其进行克隆并追加到克隆中:

let a = String::from("hello");
let b = String::from(" world");
let c = a.clone() + &b;
// `a` 在这里仍然有效。
Run

可以通过将第一个切片转换为 String 来完成 &str 切片的连接:

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<u8>>::Output

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impl Add<&u8> for u8

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

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impl Add<&u16> for &u16

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

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impl Add<&u16> for u16

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

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impl Add<&u32> for &u32

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

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impl Add<&u32> for u32

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

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impl Add<&u64> for &u64

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

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impl Add<&u64> for u64

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

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impl Add<&u128> for &u128

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

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impl Add<&u128> for u128

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

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impl Add<&usize> for &usize

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

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impl Add<&usize> for usize

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type Output = <usize as Add<usize>>::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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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<f32> for f32

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type Output = f32

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impl Add<f64> for f64

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type Output = f64

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impl Add<i8> for i8

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type Output = i8

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impl Add<i16> for i16

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type Output = i16

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impl Add<i32> for i32

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type Output = i32

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impl Add<i64> for i64

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type Output = i64

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impl Add<i128> for i128

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type Output = i128

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impl Add<isize> for isize

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impl Add<u8> for u8

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type Output = u8

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impl Add<u16> for u16

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type Output = u16

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impl Add<u32> for u32

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type Output = u32

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impl Add<u64> for u64

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type Output = u64

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impl Add<u128> for u128

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type Output = u128

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impl Add<usize> for usize

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impl Add<Assume> for Assume

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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<i32>> for Saturating<i32>

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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<isize>> for Saturating<isize>

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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<u32>> for Saturating<u32>

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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<usize>> for Saturating<usize>

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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<i32>> for Wrapping<i32>

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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<isize>> for Wrapping<isize>

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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<u32>> for Wrapping<u32>

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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<usize>> for Wrapping<usize>

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impl Add<Duration> for Duration

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

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type Output = Cow<'a, str>

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impl<'a> Add<Cow<'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<f32>>::Output

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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type Output = <usize as Add<usize>>::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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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 LANES: usize> Add<&'rhs Simd<T, LANES>> for &'lhs Simd<T, LANES>where T: SimdElement, Simd<T, LANES>: Add<Simd<T, LANES>, Output = Simd<T, LANES>>, LaneCount<LANES>: SupportedLaneCount,

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type Output = Simd<T, LANES>

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

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type Output = Simd<T, LANES>

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

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type Output = Simd<T, LANES>

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impl<const N: usize> Add<Simd<f32, N>> for Simd<f32, N>where f32: SimdElement, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<f32, N>

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impl<const N: usize> Add<Simd<f64, N>> for Simd<f64, N>where f64: SimdElement, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<f64, N>

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impl<const N: usize> Add<Simd<i8, N>> for Simd<i8, N>where i8: SimdElement, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<i8, N>

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impl<const N: usize> Add<Simd<i16, N>> for Simd<i16, N>where i16: SimdElement, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<i16, N>

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impl<const N: usize> Add<Simd<i32, N>> for Simd<i32, N>where i32: SimdElement, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<i32, N>

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impl<const N: usize> Add<Simd<i64, N>> for Simd<i64, N>where i64: SimdElement, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<i64, N>

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impl<const N: usize> Add<Simd<isize, N>> for Simd<isize, N>where isize: SimdElement, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<isize, N>

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impl<const N: usize> Add<Simd<u8, N>> for Simd<u8, N>where u8: SimdElement, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<u8, N>

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impl<const N: usize> Add<Simd<u16, N>> for Simd<u16, N>where u16: SimdElement, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<u16, N>

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impl<const N: usize> Add<Simd<u32, N>> for Simd<u32, N>where u32: SimdElement, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<u32, N>

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impl<const N: usize> Add<Simd<u64, N>> for Simd<u64, N>where u64: SimdElement, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<u64, N>

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impl<const N: usize> Add<Simd<usize, N>> for Simd<usize, N>where usize: SimdElement, LaneCount<N>: SupportedLaneCount,

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type Output = Simd<usize, N>