| // 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. |
| |
| #![feature(associated_type_defaults)] |
| |
| use std::ops::{Index}; |
| |
| trait Hierarchy { |
| type Value; |
| type ChildKey; |
| type Children = Index<Self::ChildKey, Output=Hierarchy>; |
| //~^ ERROR: the value of the associated types `Value` (from the trait `Hierarchy`), `ChildKey` |
| |
| fn data(&self) -> Option<(Self::Value, Self::Children)>; |
| } |
| |
| fn main() {} |
