Enum Either2 

pub enum Either2<A, B> {
    First(A),
    Second(B),
}

A tagged union for representing a simple two-case discriminated union.

Variants

First(A)

The first alternative.

Second(B)

The second alternative.

Implementations

impl<A, B> Either2<A, B>

pub fn is_first(&self) -> bool

Returns true if this is the first alternative.

pub fn is_second(&self) -> bool

Returns true if this is the second alternative.

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

Returns the first value if present.

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

Returns the second value if present.

pub fn map_first<C, F: FnOnce(A) -> C>(self, f: F) -> Either2<C, B>

Maps over the first alternative.