Trait std::ops::BitAnd 1.0.0[−][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 Rhs 是 Self,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
Required methods
Implementors
将 self 和 rhs 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
将 self 和 rhs 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