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use std::collections::BTreeSet;
#[derive(Hash)]
pub enum ElemDerived {
//~^ ERROR recursive type `ElemDerived` has infinite size
A(ElemDerived)
}
pub enum Elem {
Derived(ElemDerived)
}
pub struct Set(BTreeSet<Elem>);
impl Set {
pub fn into_iter(self) -> impl Iterator<Item = Elem> {
self.0.into_iter()
}
}
fn main() {}
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