activitystreams-new/src/either.rs

#[derive(
    Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd, serde::Deserialize, serde::Serialize,
)]
#[serde(untagged)]
pub enum Either<L, R> {
    Left(L),
    Right(R),
}

impl<L, R> Either<L, R> {
    pub fn left(self) -> Option<L> {
        if let Either::Left(l) = self {
            Some(l)
        } else {
            None
        }
    }

    pub fn right(self) -> Option<R> {
        if let Either::Right(r) = self {
            Some(r)
        } else {
            None
        }
    }

    pub fn as_ref(&self) -> Either<&L, &R> {
        match self {
            Either::Left(ref l) => Either::Left(l),
            Either::Right(ref r) => Either::Right(r),
        }
    }
}