| // Copyright 2017 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(rustc_attrs)] |
| |
| use std::mem; |
| |
| trait Trait1<T> {} |
| trait Trait2<'a> { |
| type Ty; |
| } |
| |
| fn _ice(param: Box<for <'a> Trait1<<() as Trait2<'a>>::Ty>>) { |
| let _e: (usize, usize) = unsafe{mem::transmute(param)}; |
| } |
| |
| trait Lifetime<'a> { |
| type Out; |
| } |
| impl<'a> Lifetime<'a> for () { |
| type Out = &'a (); |
| } |
| fn foo<'a>(x: &'a ()) -> <() as Lifetime<'a>>::Out { |
| x |
| } |
| |
| fn takes_lifetime(_f: for<'a> fn(&'a ()) -> <() as Lifetime<'a>>::Out) { |
| } |
| |
| #[rustc_error] |
| fn main() { //~ ERROR compilation successful |
| takes_lifetime(foo); |
| } |
