| // 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. |
| |
| // Test that the NLL `relate_tys` code correctly deduces that a |
| // function returning always its first argument can be upcast to one |
| // that returns either first or second argument. |
| // |
| // compile-pass |
| // compile-flags:-Zno-leak-check |
| |
| #![feature(nll)] |
| |
| fn make_it() -> for<'a, 'b> fn(&'a u32, &'b u32) -> &'a u32 { |
| panic!() |
| } |
| |
| fn main() { |
| let a: for<'a> fn(&'a u32, &'a u32) -> &'a u32 = make_it(); |
| drop(a); |
| } |
