Trait std::ops::BitAnd1.0.0[][src]

pub trait BitAnd<Rhs = Self> {
    type Output;
    #[must_use]
    fn bitand(self, rhs: Rhs) -> Self::Output;
}
Expand description

按位与运算符 &

请注意,默认情况下 RhsSelf,但这不是强制性的。

Examples

BitAnd 的实现,用于围绕 bool 的包装。

use std::ops::BitAnd;

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

impl BitAnd for Scalar {
    type Output = Self;

    // rhs 是表达式 `a & b` 的 "right-hand side"
    fn bitand(self, rhs: Self) -> Self::Output {
        Self(self.0 & rhs.0)
    }
}

assert_eq!(Scalar(true) & Scalar(true), Scalar(true));
assert_eq!(Scalar(true) & Scalar(false), Scalar(false));
assert_eq!(Scalar(false) & Scalar(true), Scalar(false));
assert_eq!(Scalar(false) & Scalar(false), Scalar(false));
Run

BitAnd 的实现,用于围绕 Vec<bool> 的包装。

use std::ops::BitAnd;

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

impl BitAnd for BooleanVector {
    type Output = Self;

    fn bitand(self, Self(rhs): Self) -> Self::Output {
        let Self(lhs) = self;
        assert_eq!(lhs.len(), rhs.len());
        Self(
            lhs.iter()
                .zip(rhs.iter())
                .map(|(x, y)| *x & *y)
                .collect()
        )
    }
}

let bv1 = BooleanVector(vec![true, true, false, false]);
let bv2 = BooleanVector(vec![true, false, true, false]);
let expected = BooleanVector(vec![true, false, false, false]);
assert_eq!(bv1 & bv2, expected);
Run

Associated Types

应用 & 运算符后的结果类型。

Required methods

执行 & 操作。

Examples

assert_eq!(true & false, false);
assert_eq!(true & true, true);
assert_eq!(5u8 & 1u8, 1);
assert_eq!(5u8 & 2u8, 0);
Run

Implementors

selfrhs 的交集返回为新的 BTreeSet<T>

Examples

use std::collections::BTreeSet;

let a: BTreeSet<_> = vec![1, 2, 3].into_iter().collect();
let b: BTreeSet<_> = vec![2, 3, 4].into_iter().collect();

let result = &a & &b;
let result_vec: Vec<_> = result.into_iter().collect();
assert_eq!(result_vec, [2, 3]);
Run

selfrhs 的交集返回为新的 HashSet<T, S>

Examples

use std::collections::HashSet;

let a: HashSet<_> = vec![1, 2, 3].into_iter().collect();
let b: HashSet<_> = vec![2, 3, 4].into_iter().collect();

let set = &a & &b;

let mut i = 0;
let expected = [2, 3];
for x in &set {
    assert!(expected.contains(x));
    i += 1;
}
assert_eq!(i, expected.len());
Run