Struct Either 

pub struct Either<E, A> { /* private fields */ }

A simple Either monad with error type E.

Implementations

impl<E, A> Either<E, A>

pub fn right(a: A) -> Self

Construct a Right a (success).

pub fn left(e: E) -> Self

Construct a Left e (error).

pub fn is_right(&self) -> bool

Return true if Right.

pub fn is_left(&self) -> bool

Return true if Left.

pub fn bind<B>(self, f: impl FnOnce(A) -> Either<E, B>) -> Either<E, B>

Monadic bind on the Right side.

pub fn fmap<B>(self, f: impl FnOnce(A) -> B) -> Either<E, B>

Map over the Right side.

pub fn map_left<F2>(self, f: impl FnOnce(E) -> F2) -> Either<F2, A>

Map over the Left side.

pub fn into_result(self) -> Result<A, E>

Convert to Result.

pub fn unwrap_right(self) -> A

where E: Debug,

Extract the right value or panic.

Trait Implementations

impl<E: Clone, A: Clone> Clone for Either<E, A>

fn clone(&self) -> Either<E, A>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<E: Debug, A: Debug> Debug for Either<E, A>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<E: PartialEq, A: PartialEq> PartialEq for Either<E, A>

fn eq(&self, other: &Either<E, A>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<E: Eq, A: Eq> Eq for Either<E, A>

impl<E, A> StructuralPartialEq for Either<E, A>