Enum EitherOrBoth

pub enum EitherOrBoth<A, B> {
    Both(A, B),
    Left(A),
    Right(B),
}

Value that either holds a single A or B, or both.

Variants

Both(A, B)

Both values are present.

Left(A)

Only the left value of type A is present.

Right(B)

Only the right value of type B is present.

Implementations

impl<A, B> EitherOrBoth<A, B>

pub fn has_left(&self) -> bool

If Left, or Both, return true, otherwise, return false.

pub fn has_right(&self) -> bool

If Right, or Both, return true, otherwise, return false.

pub fn is_left(&self) -> bool

If Left, return true otherwise, return false. Exclusive version of [has_left].

pub fn is_right(&self) -> bool

If Right, return true otherwise, return false. Exclusive version of [has_right].

pub fn is_both(&self) -> bool

If Right, return true otherwise, return false. Equivalent to self.as_ref().both().is_some().

pub fn left(self) -> Option<A>

If Left, or Both, return Some with the left value, otherwise, return None.

pub fn right(self) -> Option<B>

If Right, or Both, return Some with the right value, otherwise, return None.

pub fn both(self) -> Option<(A, B)>

If Both, return Some tuple containing left and right.

pub fn as_ref(&self) -> EitherOrBoth<&A, &B>

Converts from &EitherOrBoth<A, B> to EitherOrBoth<&A, &B>.

pub fn as_mut(&mut self) -> EitherOrBoth<&mut A, &mut B>

Converts from &mut EitherOrBoth<A, B> to EitherOrBoth<&mut A, &mut B>.

pub fn flip(self) -> EitherOrBoth<B, A>

Convert EitherOrBoth<A, B> to EitherOrBoth<B, A>.

pub fn map_left<F, M>(self, f: F) -> EitherOrBoth<M, B>

where F: FnOnce(A) -> M,

Apply the function f on the value a in Left(a) or Both(a, b) variants. If it is present rewrapping the result in self’s original variant.

pub fn map_right<F, M>(self, f: F) -> EitherOrBoth<A, M>

where F: FnOnce(B) -> M,

Apply the function f on the value b in Right(b) or Both(a, b) variants. If it is present rewrapping the result in self’s original variant.

pub fn map_any<F, L, G, R>(self, f: F, g: G) -> EitherOrBoth<L, R>

where F: FnOnce(A) -> L, G: FnOnce(B) -> R,

Apply the functions f and g on the value a and b respectively; found in Left(a), Right(b), or Both(a, b) variants. The Result is rewrapped self’s original variant.

pub fn left_and_then<F, L>(self, f: F) -> EitherOrBoth<L, B>

where F: FnOnce(A) -> EitherOrBoth<L, B>,

Apply the function f on the value b in Right(b) or Both(a, _) variants if it is present.

pub fn right_and_then<F, R>(self, f: F) -> EitherOrBoth<A, R>

where F: FnOnce(B) -> EitherOrBoth<A, R>,

Apply the function f on the value a in Left(a) or Both(a, _) variants if it is present.

impl<T> EitherOrBoth<T, T>

pub fn reduce<F>(self, f: F) -> T

where F: FnOnce(T, T) -> T,

Return either value of left, right, or the product of f applied where Both are present.

Trait Implementations

impl<A, B> Clone for EitherOrBoth<A, B>

where A: Clone, B: Clone,

fn clone(&self) -> EitherOrBoth<A, B>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<A, B> Debug for EitherOrBoth<A, B>

where A: Debug, B: Debug,

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

Formats the value using the given formatter.

impl<A, B> Hash for EitherOrBoth<A, B>

where A: Hash, B: Hash,

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<A, B> Into<Option<Either<A, B>>> for EitherOrBoth<A, B>

fn into(self) -> Option<Either<A, B>>

Converts this type into the (usually inferred) input type.

impl<A, B> PartialEq for EitherOrBoth<A, B>

where A: PartialEq, B: PartialEq,

fn eq(&self, other: &EitherOrBoth<A, B>) -> 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<A, B> Eq for EitherOrBoth<A, B>

where A: Eq, B: Eq,

impl<A, B> StructuralPartialEq for EitherOrBoth<A, B>