lr 0.1.0

Either left or right
Documentation 
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/// Either<L, R> is either Left(L) or Right(R)
pub enum Either<L, R> {
    Left(L),
    Right(R),
}

pub use Either::{Left, Right};

#[cfg(test)]
mod tests {
    #[test]
    fn it_works() {
        let result = 2 + 2;
        assert_eq!(result, 4);
    }
}