Trait std::ops::BitAndAssign1.8.0 [] [src]

pub trait BitAndAssign<Rhs = Self> {
    fn bitand_assign(&mut self, Rhs);
}

The BitAndAssign trait is used to specify the functionality of &=.

Examples

In this example, the &= operator is lifted to a trivial Scalar type.

use std::ops::BitAndAssign;

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

impl BitAndAssign for Scalar {
    // rhs is the "right-hand side" of the expression `a &= b`
    fn bitand_assign(&mut self, rhs: Self) {
        *self = Scalar(self.0 & rhs.0)
    }
}

fn main() {
    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));
}Run

In this example, the BitAndAssign trait is implemented for a BooleanVector struct.

use std::ops::BitAndAssign;

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

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

fn main() {
    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);
}Run

Required Methods

The method for the &= operator

Implementors