| // 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 |
| |
| #![allow(unused)] |
| #![deny(explicit_outlives_requirements)] |
| |
| // A case where we can't infer the outlives requirement. Example copied from |
| // RFC 2093. |
| // (https://rust-lang.github.io/rfcs/2093-infer-outlives.html |
| // #where-explicit-annotations-would-still-be-required) |
| |
| |
| trait MakeRef<'a> { |
| type Type; |
| } |
| |
| impl<'a, T> MakeRef<'a> for Vec<T> |
| where T: 'a // still required |
| { |
| type Type = &'a T; |
| } |
| |
| |
| struct Foo<'a, T> |
| where T: 'a // still required, not inferred from `field` |
| { |
| field: <Vec<T> as MakeRef<'a>>::Type |
| } |
| |
| |
| fn main() {} |
