| // Copyright 2018 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. |
| |
| // compile-pass |
| |
| #![feature(nll)] |
| |
| use std::ops::Deref; |
| |
| pub struct TypeFieldIterator<'a, T: 'a> { |
| _t: &'a T, |
| } |
| |
| pub struct Type<Id, T> { |
| _types: Vec<(Id, T)>, |
| } |
| |
| impl<'a, Id: 'a, T> Iterator for TypeFieldIterator<'a, T> |
| where T: Deref<Target = Type<Id, T>> { |
| type Item = &'a (Id, T); |
| |
| fn next(&mut self) -> Option<&'a (Id, T)> { |
| || self.next(); |
| None |
| } |
| } |
| |
| fn main() { } |
