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// run-pass
// Test case where an associated type is referenced from within the
// supertrait definition. Issue #20220.
use std::vec::IntoIter;
pub trait Foo: Iterator<Item=<Self as Foo>::Key> {
type Key;
}
impl Foo for IntoIter<i32> {
type Key = i32;
}
fn sum_foo<F:Foo<Key=i32>>(f: F) -> i32 {
f.fold(0, |a,b| a + b)
}
fn main() {
let x = sum_foo(vec![11, 10, 1].into_iter());
assert_eq!(x, 22);
}
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