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Trait std::ops::BitAndAssign ​

按位与赋值运算符 &=

rust
pub trait BitAndAssign<Rhs = Self> {
    // Required method
    fn bitand_assign(&mut self, rhs: Rhs);
}

BitAndAssign 的实现，将 &= 运算符提升为 bool 的包装器。

rust
use std::ops::BitAndAssign;

#[derive(Debug, PartialEq)]
struct Scalar(bool);

impl BitAndAssign for Scalar {
    // rhs 是表达式 `a &= b` 的 "right-hand side"
    fn bitand_assign(&mut self, rhs: Self) {
        *self = Self(self.0 & rhs.0)
    }
}

let mut scalar = Scalar(true);
scalar &= Scalar(true);
assert_eq!(scalar, Scalar(true));

let mut scalar = Scalar(true);
scalar &= Scalar(false);
assert_eq!(scalar, Scalar(false));

let mut scalar = Scalar(false);
scalar &= Scalar(true);
assert_eq!(scalar, Scalar(false));

let mut scalar = Scalar(false);
scalar &= Scalar(false);
assert_eq!(scalar, Scalar(false));

这里，BitAndAssign trait 是为 Vec<bool> 周围的包装器实现的。

rust
use std::ops::BitAndAssign;

#[derive(Debug, PartialEq)]
struct BooleanVector(Vec<bool>);

impl BitAndAssign for BooleanVector {
    // `rhs` 是表达式 `a &= b` 的 "right-hand side"。
    fn bitand_assign(&mut self, rhs: Self) {
        assert_eq!(self.0.len(), rhs.0.len());
        *self = Self(
            self.0
                .iter()
                .zip(rhs.0.iter())
                .map(|(x, y)| *x & *y)
                .collect()
        );
    }
}

let mut bv = BooleanVector(vec![true, true, false, false]);
bv &= BooleanVector(vec![true, false, true, false]);
let expected = BooleanVector(vec![true, false, false, false]);
assert_eq!(bv, expected);

Required Methods ​

bitand_assign ​

执行 &= 操作。

rust
fn bitand_assign(&mut self, rhs: Rhs)

参数：

  • rhs：执行 &= 操作的右值
rust
let mut x = true;
x &= false;
assert_eq!(x, false);

let mut x = true;
x &= true;
assert_eq!(x, true);

let mut x: u8 = 5;
x &= 1;
assert_eq!(x, 1);

let mut x: u8 = 5;
x &= 2;
assert_eq!(x, 0);

Implementors ​

impl BitAndAssign<&bool> for bool ​

impl BitAndAssign<&i8> for i8 ​

impl BitAndAssign<&i8> for Saturating<i8> ​

impl BitAndAssign<&i8> for Wrapping<i8> ​

impl BitAndAssign<&i16> for i16 ​

impl BitAndAssign<&i16> for Saturating<i16> ​

impl BitAndAssign<&i16> for Wrapping<i16> ​

impl BitAndAssign<&i32> for i32 ​

impl BitAndAssign<&i32> for Saturating<i32> ​

impl BitAndAssign<&i32> for Wrapping<i32> ​

impl BitAndAssign<&i64> for i64 ​

impl BitAndAssign<&i64> for Saturating<i64> ​

impl BitAndAssign<&i64> for Wrapping<i64> ​

impl BitAndAssign<&i128> for i128 ​

impl BitAndAssign<&i128> for Saturating<i128> ​

impl BitAndAssign<&i128> for Wrapping<i128> ​

impl BitAndAssign<&isize> for isize ​

impl BitAndAssign<&isize> for Saturating<isize> ​

impl BitAndAssign<&isize> for Wrapping<isize> ​

impl BitAndAssign<&u8> for u8 ​

impl BitAndAssign<&u8> for Saturating<u8> ​

impl BitAndAssign<&u8> for Wrapping<u8> ​

impl BitAndAssign<&u16> for u16 ​

impl BitAndAssign<&u16> for Saturating<u16> ​

impl BitAndAssign<&u16> for Wrapping<u16> ​

impl BitAndAssign<&u32> for u32 ​

impl BitAndAssign<&u32> for Saturating<u32> ​

impl BitAndAssign<&u32> for Wrapping<u32> ​

impl BitAndAssign<&u64> for u64 ​

impl BitAndAssign<&u64> for Saturating<u64> ​

impl BitAndAssign<&u64> for Wrapping<u64> ​

impl BitAndAssign<&u128> for u128 ​

impl BitAndAssign<&u128> for Saturating<u128> ​

impl BitAndAssign<&u128> for Wrapping<u128> ​

impl BitAndAssign<&usize> for usize ​

impl BitAndAssign<&usize> for Saturating<usize> ​

impl BitAndAssign<&usize> for Wrapping<usize> ​

impl BitAndAssign<&Saturating<i8>> for Saturating<i8> ​

impl BitAndAssign<&Saturating<i16>> for Saturating<i16> ​

impl BitAndAssign<&Saturating<i32>> for Saturating<i32> ​

impl BitAndAssign<&Saturating<i64>> for Saturating<i64> ​

impl BitAndAssign<&Saturating<i128>> for Saturating<i128> ​

impl BitAndAssign<&Saturating<isize>> for Saturating<isize> ​

impl BitAndAssign<&Saturating<u8>> for Saturating<u8> ​

impl BitAndAssign<&Saturating<u16>> for Saturating<u16> ​

impl BitAndAssign<&Saturating<u32>> for Saturating<u32> ​

impl BitAndAssign<&Saturating<u64>> for Saturating<u64> ​

impl BitAndAssign<&Saturating<u128>> for Saturating<u128> ​

impl BitAndAssign<&Saturating<usize>> for Saturating<usize> ​

impl BitAndAssign<&Wrapping<i8>> for Wrapping<i8> ​

impl BitAndAssign<&Wrapping<i16>> for Wrapping<i16> ​

impl BitAndAssign<&Wrapping<i32>> for Wrapping<i32> ​

impl BitAndAssign<&Wrapping<i64>> for Wrapping<i64> ​

impl BitAndAssign<&Wrapping<i128>> for Wrapping<i128> ​

impl BitAndAssign<&Wrapping<isize>> for Wrapping<isize> ​

impl BitAndAssign<&Wrapping<u8>> for Wrapping<u8> ​

impl BitAndAssign<&Wrapping<u16>> for Wrapping<u16> ​

impl BitAndAssign<&Wrapping<u32>> for Wrapping<u32> ​

impl BitAndAssign<&Wrapping<u64>> for Wrapping<u64> ​

impl BitAndAssign<&Wrapping<u128>> for Wrapping<u128> ​

impl BitAndAssign<&Wrapping<usize>> for Wrapping<usize> ​

impl BitAndAssign<bool> for bool ​

impl BitAndAssign<i8> for i8 ​

impl BitAndAssign<i8> for Saturating<i8> ​

impl BitAndAssign<i8> for Wrapping<i8> ​

impl BitAndAssign<i16> for i16 ​

impl BitAndAssign<i16> for Saturating<i16> ​

impl BitAndAssign<i16> for Wrapping<i16> ​

impl BitAndAssign<i32> for i32 ​

impl BitAndAssign<i32> for Saturating<i32> ​

impl BitAndAssign<i32> for Wrapping<i32> ​

impl BitAndAssign<i64> for i64 ​

impl BitAndAssign<i64> for Saturating<i64> ​

impl BitAndAssign<i64> for Wrapping<i64> ​

impl BitAndAssign<i128> for i128 ​

​

impl BitAndAssign<i128> for Saturating<i128> ​

impl BitAndAssign<i128> for Wrapping<i128> ​

impl BitAndAssign<isize> for isize ​

impl BitAndAssign<isize> for Saturating<isize> ​

impl BitAndAssign<isize> for Wrapping<isize> ​

impl BitAndAssign<u8> for u8 ​

impl BitAndAssign<u8> for Saturating<u8> ​

impl BitAndAssign<u8> for Wrapping<u8> ​

impl BitAndAssign<u16> for u16 ​

impl BitAndAssign<u16> for Saturating<u16> ​

impl BitAndAssign<u16> for Wrapping<u16> ​

impl BitAndAssign<u32> for u32 ​

impl BitAndAssign<u32> for Saturating<u32> ​

impl BitAndAssign<u32> for Wrapping<u32> ​

impl BitAndAssign<u64> for u64 ​

impl BitAndAssign<u64> for Saturating<u64> ​

impl BitAndAssign<u64> for Wrapping<u64> ​

impl BitAndAssign<u128> for u128 ​

impl BitAndAssign<u128> for Saturating<u128> ​

impl BitAndAssign<u128> for Wrapping<u128> ​

impl BitAndAssign<usize> for usize ​

impl BitAndAssign<usize> for Saturating<usize> ​

impl BitAndAssign<usize> for Wrapping<usize> ​

impl BitAndAssign<Saturating<i8>> for Saturating<i8> ​

impl BitAndAssign<Saturating<i16>> for Saturating<i16> ​

impl BitAndAssign<Saturating<i32>> for Saturating<i32> ​

impl BitAndAssign<Saturating<i64>> for Saturating<i64> ​

impl BitAndAssign<Saturating<i128>> for Saturating<i128> ​

impl BitAndAssign<Saturating<isize>> for Saturating<isize> ​

impl BitAndAssign<Saturating<u8>> for Saturating<u8> ​

impl BitAndAssign<Saturating<u16>> for Saturating<u16> ​

impl BitAndAssign<Saturating<u32>> for Saturating<u32> ​

impl BitAndAssign<Saturating<u64>> for Saturating<u64> ​

impl BitAndAssign<Saturating<u128>> for Saturating<u128> ​

impl BitAndAssign<Saturating<usize>> for Saturating<usize> ​

impl BitAndAssign<Wrapping<i8>> for Wrapping<i8> ​

impl BitAndAssign<Wrapping<i16>> for Wrapping<i16> ​

impl BitAndAssign<Wrapping<i32>> for Wrapping<i32> ​

impl BitAndAssign<Wrapping<i64>> for Wrapping<i64> ​

impl BitAndAssign<Wrapping<i128>> for Wrapping<i128> ​

impl BitAndAssign<Wrapping<isize>> for Wrapping<isize> ​

impl BitAndAssign<Wrapping<u8>> for Wrapping<u8> ​

impl BitAndAssign<Wrapping<u16>> for Wrapping<u16> ​

impl BitAndAssign<Wrapping<u32>> for Wrapping<u32> ​

impl BitAndAssign<Wrapping<u64>> for Wrapping<u64> ​

impl BitAndAssign<Wrapping<u128>> for Wrapping<u128> ​

impl BitAndAssign<Wrapping<usize>> for Wrapping<usize> ​

impl<T, U, const LANES: usize> BitAndAssign<U> for Simd<T, LANES> ​

rust
impl<T, U, const LANES: usize> BitAndAssign<U> for Simd<T, LANES>
where
  Simd<T, LANES>: BitAnd<U, Output = Simd<T, LANES>>,
  T: SimdElement,
  LaneCount<LANES>: SupportedLaneCount,

impl<T, const LANES: usize> BitAndAssign<bool> for Mask<T, LANES> ​

rust
impl<T, const LANES: usize> BitAndAssign<bool> for Mask<T, LANES>
where
  T: MaskElement,
  LaneCount<LANES>: SupportedLaneCount,

impl<T, const LANES: usize> BitAndAssign<Mask<T, LANES>> for Mask<T, LANES> ​

rust
impl<T, const LANES: usize> BitAndAssign<Mask<T, LANES>> for Mask<T, LANES>
where
  T: MaskElement,
  LaneCount<LANES>: SupportedLaneCount,

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