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// check-fail
enum Either<L, R> {
Left(L),
Right(R),
}
pub trait HasChildrenOf {
type T;
type TRef<'a>;
//~^ missing required
fn ref_children<'a>(&'a self) -> Vec<Self::TRef<'a>>;
fn take_children(self) -> Vec<Self::T>;
}
impl<Left, Right> HasChildrenOf for Either<Left, Right>
where
Left: HasChildrenOf,
Right: HasChildrenOf,
{
type T = Either<Left::T, Right::T>;
type TRef<'a> = Either<&'a Left::T, &'a Right::T>
where
<Left as HasChildrenOf>::T: 'a,
<Right as HasChildrenOf>::T: 'a;
fn ref_children<'a>(&'a self) -> Vec<Self::TRef<'a>> {
todo!()
}
fn take_children(self) -> Vec<Self::T> {
todo!()
}
}
fn main() {}
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