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use super::*; use std::marker::PhantomData; pub struct Empty<T, E>(E, PhantomData<T>); impl<T, E> ListFn for Empty<T, E> { type Item = T; type End = E; fn next(self) -> ListState<Self> { ListState::End(self.0) } } impl<T, E> Empty<T, E> { pub fn new(e: E) -> Self { Empty(e, PhantomData::default()) } }