| // 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 structs with higher-ranked where clauses don't generate |
| // "outlives" requirements. Issue #22246. |
| |
| #![allow(dead_code)] |
| #![feature(rustc_attrs)] |
| |
| /////////////////////////////////////////////////////////////////////////// |
| |
| pub trait TheTrait<'b> { |
| type TheAssocType; |
| } |
| |
| pub struct TheType<'b> { |
| m: [fn(&'b()); 0] |
| } |
| |
| impl<'a,'b> TheTrait<'a> for TheType<'b> { |
| type TheAssocType = &'b (); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| |
| pub struct WithHrAssoc<T> |
| where for<'a> T : TheTrait<'a> |
| { |
| m: [T; 0] |
| } |
| |
| fn with_assoc<'a,'b>() { |
| // We get an error because 'b:'a does not hold: |
| |
| let _: &'a WithHrAssoc<TheType<'b>> = loop { }; |
| //~^ ERROR reference has a longer lifetime |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| |
| pub trait TheSubTrait : for<'a> TheTrait<'a> { |
| } |
| |
| impl<'b> TheSubTrait for TheType<'b> { } |
| |
| pub struct WithHrAssocSub<T> |
| where T : TheSubTrait |
| { |
| m: [T; 0] |
| } |
| |
| fn with_assoc_sub<'a,'b>() { |
| // The error here is just because `'b:'a` must hold for the type |
| // below to be well-formed, it is not related to the HR relation. |
| |
| let _: &'a WithHrAssocSub<TheType<'b>> = loop { }; |
| //~^ ERROR reference has a longer lifetime |
| } |
| |
| #[rustc_error] |
| fn main() { |
| } |