#[derive(Clone, Copy, Debug)]
pub enum Either<L, R> {
Left(L),
Right(R),
}
impl<L, R> Either<L, R> {
pub fn left(&self) -> Option<&L> {
match self {
Either::Left(l) => Some(l),
_ => None,
}
}
pub fn right(&self) -> Option<&R> {
match self {
Either::Right(r) => Some(r),
_ => None,
}
}
pub fn left_mut(&mut self) -> Option<&mut L> {
match self {
Either::Left(l) => Some(l),
_ => None,
}
}
pub fn right_mut(&mut self) -> Option<&mut R> {
match self {
Either::Right(r) => Some(r),
_ => None,
}
}
pub fn is_left_and<F: FnOnce(&L) -> bool>(&self, f: F) -> bool {
self.left().map(f).unwrap_or(false)
}
pub fn is_right_and<F: FnOnce(&R) -> bool>(&self, f: F) -> bool {
self.right().map(f).unwrap_or(false)
}
pub fn into_left(self) -> Option<L> {
match self {
Either::Left(l) => Some(l),
_ => None,
}
}
pub fn into_right(self) -> Option<R> {
match self {
Either::Right(r) => Some(r),
_ => None,
}
}
}