1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // Test case where an associated type is referenced from within the
12 // supertrait definition. Issue #20220.
14 use std::vec::IntoIter;
16 pub trait Foo: Iterator<Item=<Self as Foo>::Key> {
20 impl Foo for IntoIter<i32> {
24 fn sum_foo<F:Foo<Key=i32>>(f: F) -> i32 {
25 f.fold(0, |a,b| a + b)
29 let x = sum_foo(vec![11, 10, 1].into_iter());