1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
13 #![feature(in_band_lifetimes)]
14 #![deny(single_use_lifetimes)]
16 #![allow(unused_variables)]
18 // Test that we DO warn when lifetime name is used only
19 // once in a fn argument, even with in band lifetimes.
21 fn a(x: &u32, y: &u32) {
22 //~^ ERROR `'a` only used once
23 //~| ERROR `'b` only used once
24 //~| HELP elide the single-use lifetime
25 //~| HELP elide the single-use lifetime