Trait IntoEither

pub trait IntoEither: Sized

Provides methods for converting a type Self into either a Left or Right variant of Either<Self, Self>.

The into_either method takes a bool to determine whether to convert to Left or Right.

The into_either_with method takes a predicate function to determine whether to convert to Left or Right.

Provided Methods

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise.

Examples

use either::{IntoEither, Left, Right};

let x = 0;
assert_eq!(x.into_either(true), Left(x));
assert_eq!(x.into_either(false), Right(x));

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where
    F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise.

Examples

use either::{IntoEither, Left, Right};

fn is_even(x: &u8) -> bool {
    x % 2 == 0
}

let x = 0;
assert_eq!(x.into_either_with(is_even), Left(x));
assert_eq!(x.into_either_with(|x| !is_even(x)), Right(x));

Implementors