| // 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. |
| |
| trait Stream { type Item; } |
| impl<'a> Stream for &'a str { type Item = u8; } |
| fn f<'s>(s: &'s str) -> (&'s str, <&'s str as Stream>::Item) { |
| (s, 42) |
| } |
| |
| fn main() { |
| let fx = f as for<'t> fn(&'t str) -> (&'t str, <&'t str as Stream>::Item); |
| assert_eq!(fx("hi"), ("hi", 42)); |
| } |
