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1a4d82fc | 1 | // Copyright 2015 The Rust Project Developers. See the COPYRIGHT |
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2 | // file at the top-level directory of this distribution and at |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
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. | |
10 | ||
b7449926 | 11 | // run-pass |
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12 | // Test case where an associated type is referenced from within the |
13 | // supertrait definition. Issue #20220. | |
223e47cc | 14 | |
1a4d82fc | 15 | |
c34b1796 | 16 | use std::vec::IntoIter; |
223e47cc | 17 | |
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18 | pub trait Foo: Iterator<Item=<Self as Foo>::Key> { |
19 | type Key; | |
20 | } | |
21 | ||
22 | impl Foo for IntoIter<i32> { | |
23 | type Key = i32; | |
24 | } | |
25 | ||
26 | fn sum_foo<F:Foo<Key=i32>>(f: F) -> i32 { | |
27 | f.fold(0, |a,b| a + b) | |
28 | } | |
29 | ||
30 | fn main() { | |
31 | let x = sum_foo(vec![11, 10, 1].into_iter()); | |
32 | assert_eq!(x, 22); | |
33 | } |