| // Copyright 2015 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // Test that we correctly normalize the type of a struct field |
| // which has an associated type. |
| |
| |
| pub trait UnifyKey { |
| type Value; |
| |
| fn dummy(&self) { } |
| } |
| |
| pub struct Node<K:UnifyKey> { |
| pub key: K, |
| pub value: K::Value, |
| } |
| |
| fn foo<K : UnifyKey<Value=Option<V>>,V : Clone>(node: &Node<K>) -> Option<V> { |
| node.value.clone() |
| } |
| |
| impl UnifyKey for i32 { |
| type Value = Option<u32>; |
| } |
| |
| impl UnifyKey for u32 { |
| type Value = Option<i32>; |
| } |
| |
| pub fn main() { |
| let node: Node<i32> = Node { key: 1, value: Some(22) }; |
| assert_eq!(foo(&node), Some(22)); |
| |
| let node: Node<u32> = Node { key: 1, value: Some(22) }; |
| assert_eq!(foo(&node), Some(22)); |
| } |