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//@ run-pass
#![feature(type_alias_impl_trait)]
use std::iter::{Chain, once};
type I<A> = Chain<A, impl Iterator<Item = &'static str>>;
#[define_opaque(I)]
fn test2<A: Iterator<Item = &'static str>>(x: A) -> I<A> {
x.chain(once("5"))
}
fn main() {
assert_eq!(vec!["1", "3", "5"], test2(["1", "3"].iter().cloned()).collect::<Vec<_>>());
}
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