Trait std::ops::Sub

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

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

The subtraction operator -.

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

Examples

Subtractable points

use std::ops::Sub;

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

impl Sub for Point {
    type Output = Self;

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

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

Implementing Sub with generics

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

use std::ops::Sub;

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

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

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

assert_eq!(Point { x: 2, y: 3 } - Point { x: 1, y: 0 },
           Point { x: 1, 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 sub(self, rhs: Rhs) -> Self::Output

Performs the - operation.

Example
assert_eq!(12 - 1, 11);
Run

Implementors§

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impl Sub for f32

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type Output = f32

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impl Sub for f64

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type Output = f64

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impl Sub for i8

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type Output = i8

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impl Sub for i16

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type Output = i16

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impl Sub for i32

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type Output = i32

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impl Sub for i64

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type Output = i64

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impl Sub for i128

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type Output = i128

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impl Sub for isize

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impl Sub for u8

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type Output = u8

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impl Sub for u16

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type Output = u16

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impl Sub for u32

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type Output = u32

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impl Sub for u64

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type Output = u64

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impl Sub for u128

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type Output = u128

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impl Sub for usize

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impl Sub for Assume

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impl Sub for Saturating<i8>

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impl Sub for Saturating<i16>

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impl Sub for Saturating<i32>

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impl Sub for Saturating<i64>

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impl Sub for Saturating<i128>

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impl Sub for Saturating<isize>

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impl Sub for Saturating<u8>

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impl Sub for Saturating<u16>

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impl Sub for Saturating<u32>

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impl Sub for Saturating<u64>

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impl Sub for Saturating<u128>

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impl Sub for Saturating<usize>

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impl Sub for Wrapping<i8>

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impl Sub for Wrapping<i16>

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impl Sub for Wrapping<i32>

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impl Sub for Wrapping<i64>

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impl Sub for Wrapping<i128>

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impl Sub for Wrapping<isize>

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impl Sub for Wrapping<u8>

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impl Sub for Wrapping<u16>

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impl Sub for Wrapping<u32>

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impl Sub for Wrapping<u64>

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impl Sub for Wrapping<u128>

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impl Sub for Wrapping<usize>

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impl Sub for Duration

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impl Sub for Instant

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impl Sub<&f32> for &f32

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type Output = <f32 as Sub>::Output

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impl Sub<&f32> for f32

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type Output = <f32 as Sub>::Output

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impl Sub<&f64> for &f64

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type Output = <f64 as Sub>::Output

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impl Sub<&f64> for f64

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type Output = <f64 as Sub>::Output

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impl Sub<&i8> for &i8

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type Output = <i8 as Sub>::Output

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impl Sub<&i8> for i8

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type Output = <i8 as Sub>::Output

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impl Sub<&i16> for &i16

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type Output = <i16 as Sub>::Output

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impl Sub<&i16> for i16

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type Output = <i16 as Sub>::Output

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impl Sub<&i32> for &i32

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type Output = <i32 as Sub>::Output

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impl Sub<&i32> for i32

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type Output = <i32 as Sub>::Output

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impl Sub<&i64> for &i64

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type Output = <i64 as Sub>::Output

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impl Sub<&i64> for i64

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type Output = <i64 as Sub>::Output

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impl Sub<&i128> for &i128

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type Output = <i128 as Sub>::Output

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impl Sub<&i128> for i128

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type Output = <i128 as Sub>::Output

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impl Sub<&isize> for &isize

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type Output = <isize as Sub>::Output

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impl Sub<&isize> for isize

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type Output = <isize as Sub>::Output

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impl Sub<&u8> for &u8

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type Output = <u8 as Sub>::Output

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impl Sub<&u8> for u8

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type Output = <u8 as Sub>::Output

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impl Sub<&u16> for &u16

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type Output = <u16 as Sub>::Output

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impl Sub<&u16> for u16

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type Output = <u16 as Sub>::Output

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impl Sub<&u32> for &u32

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type Output = <u32 as Sub>::Output

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impl Sub<&u32> for u32

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type Output = <u32 as Sub>::Output

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impl Sub<&u64> for &u64

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type Output = <u64 as Sub>::Output

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impl Sub<&u64> for u64

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type Output = <u64 as Sub>::Output

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impl Sub<&u128> for &u128

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type Output = <u128 as Sub>::Output

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impl Sub<&u128> for u128

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type Output = <u128 as Sub>::Output

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impl Sub<&usize> for &usize

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type Output = <usize as Sub>::Output

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impl Sub<&usize> for usize

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type Output = <usize as Sub>::Output

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impl Sub<&Saturating<i8>> for &Saturating<i8>

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impl Sub<&Saturating<i8>> for Saturating<i8>

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impl Sub<&Saturating<i16>> for &Saturating<i16>

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impl Sub<&Saturating<i16>> for Saturating<i16>

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impl Sub<&Saturating<i32>> for &Saturating<i32>

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impl Sub<&Saturating<i32>> for Saturating<i32>

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impl Sub<&Saturating<i64>> for &Saturating<i64>

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impl Sub<&Saturating<i64>> for Saturating<i64>

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impl Sub<&Saturating<i128>> for &Saturating<i128>

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impl Sub<&Saturating<i128>> for Saturating<i128>

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impl Sub<&Saturating<isize>> for &Saturating<isize>

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impl Sub<&Saturating<isize>> for Saturating<isize>

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impl Sub<&Saturating<u8>> for &Saturating<u8>

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impl Sub<&Saturating<u8>> for Saturating<u8>

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impl Sub<&Saturating<u16>> for &Saturating<u16>

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impl Sub<&Saturating<u16>> for Saturating<u16>

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impl Sub<&Saturating<u32>> for &Saturating<u32>

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impl Sub<&Saturating<u32>> for Saturating<u32>

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impl Sub<&Saturating<u64>> for &Saturating<u64>

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impl Sub<&Saturating<u64>> for Saturating<u64>

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impl Sub<&Saturating<u128>> for &Saturating<u128>

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impl Sub<&Saturating<u128>> for Saturating<u128>

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impl Sub<&Saturating<usize>> for &Saturating<usize>

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impl Sub<&Saturating<usize>> for Saturating<usize>

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impl Sub<&Wrapping<i8>> for &Wrapping<i8>

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

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impl Sub<&Wrapping<i8>> for Wrapping<i8>

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

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impl Sub<&Wrapping<i16>> for &Wrapping<i16>

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impl Sub<&Wrapping<i16>> for Wrapping<i16>

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impl Sub<&Wrapping<i32>> for &Wrapping<i32>

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impl Sub<&Wrapping<i32>> for Wrapping<i32>

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impl Sub<&Wrapping<i64>> for &Wrapping<i64>

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impl Sub<&Wrapping<i64>> for Wrapping<i64>

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impl Sub<&Wrapping<i128>> for &Wrapping<i128>

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impl Sub<&Wrapping<i128>> for Wrapping<i128>

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impl Sub<&Wrapping<isize>> for &Wrapping<isize>

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impl Sub<&Wrapping<isize>> for Wrapping<isize>

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impl Sub<&Wrapping<u8>> for &Wrapping<u8>

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

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impl Sub<&Wrapping<u8>> for Wrapping<u8>

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

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impl Sub<&Wrapping<u16>> for &Wrapping<u16>

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impl Sub<&Wrapping<u16>> for Wrapping<u16>

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impl Sub<&Wrapping<u32>> for &Wrapping<u32>

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impl Sub<&Wrapping<u32>> for Wrapping<u32>

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impl Sub<&Wrapping<u64>> for &Wrapping<u64>

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impl Sub<&Wrapping<u64>> for Wrapping<u64>

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impl Sub<&Wrapping<u128>> for &Wrapping<u128>

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impl Sub<&Wrapping<u128>> for Wrapping<u128>

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impl Sub<&Wrapping<usize>> for &Wrapping<usize>

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impl Sub<&Wrapping<usize>> for Wrapping<usize>

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impl Sub<Duration> for Instant

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impl Sub<Duration> for SystemTime

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

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type Output = <f32 as Sub>::Output

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

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type Output = <f64 as Sub>::Output

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

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type Output = <i8 as Sub>::Output

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

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type Output = <i16 as Sub>::Output

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

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type Output = <i32 as Sub>::Output

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

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type Output = <i64 as Sub>::Output

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

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type Output = <i128 as Sub>::Output

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

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type Output = <isize as Sub>::Output

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

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type Output = <u8 as Sub>::Output

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

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type Output = <u16 as Sub>::Output

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

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type Output = <u32 as Sub>::Output

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

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type Output = <u64 as Sub>::Output

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

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type Output = <u128 as Sub>::Output

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

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type Output = <usize as Sub>::Output

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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type Output = Simd<T, N>

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impl<T, A> Sub<&BTreeSet<T, A>> for &BTreeSet<T, A>
where T: Ord + Clone, A: Allocator + Clone,

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type Output = BTreeSet<T, A>

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impl<T, S> Sub<&HashSet<T, S>> for &HashSet<T, S>
where T: Eq + Hash + Clone, S: BuildHasher + Default,

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type Output = HashSet<T, S>

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

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type Output = Simd<T, N>

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

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type Output = Simd<f32, N>

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

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type Output = Simd<f64, N>

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

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type Output = Simd<i8, N>

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

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type Output = Simd<i16, N>

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

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type Output = Simd<i32, N>

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

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type Output = Simd<i64, N>

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

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type Output = Simd<isize, N>

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

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type Output = Simd<u8, N>

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

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type Output = Simd<u16, N>

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

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type Output = Simd<u32, N>

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

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type Output = Simd<u64, N>

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

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type Output = Simd<usize, N>