// 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); | |
} |