udled 0.6.2

Tokenizer and parser
Documentation 
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#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum Either<L, R> {
    Left(L),
    Right(R),
}

impl<T> Either<T, T> {
    pub fn unify(self) -> T {
        match self {
            Either::Left(left) => left,
            Either::Right(right) => right,
        }
    }
}