| // Copyright 2012 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(generic_associated_types)] |
| //~^ WARNING the feature `generic_associated_types` is incomplete |
| |
| use std::ops::Deref; |
| |
| // FIXME(#44265): "lifetime parameters are not allowed on this type" errors will be addressed in a |
| // follow-up PR. |
| |
| trait Iterable { |
| type Item<'a>; |
| type Iter<'a>: Iterator<Item = Self::Item<'a>>; |
| //~^ ERROR lifetime parameters are not allowed on this type [E0110] |
| |
| fn iter<'a>(&'a self) -> Self::Iter<'a>; |
| //~^ ERROR lifetime parameters are not allowed on this type [E0110] |
| } |
| |
| // Impl for struct type |
| impl<T> Iterable for Vec<T> { |
| type Item<'a> = &'a T; |
| type Iter<'a> = std::slice::Iter<'a, T>; |
| |
| fn iter<'a>(&'a self) -> Self::Iter<'a> { |
| //~^ ERROR lifetime parameters are not allowed on this type [E0110] |
| self.iter() |
| } |
| } |
| |
| // Impl for a primitive type |
| impl<T> Iterable for [T] { |
| type Item<'a> = &'a T; |
| type Iter<'a> = std::slice::Iter<'a, T>; |
| |
| fn iter<'a>(&'a self) -> Self::Iter<'a> { |
| //~^ ERROR lifetime parameters are not allowed on this type [E0110] |
| self.iter() |
| } |
| } |
| |
| fn make_iter<'a, I: Iterable>(it: &'a I) -> I::Iter<'a> { |
| //~^ ERROR lifetime parameters are not allowed on this type [E0110] |
| it.iter() |
| } |
| |
| fn get_first<'a, I: Iterable>(it: &'a I) -> Option<I::Item<'a>> { |
| //~^ ERROR lifetime parameters are not allowed on this type [E0110] |
| it.iter().next() |
| } |
| |
| fn main() {} |