rust/tests/ui/toplevel_ref_arg.rs

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// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution.
//
// 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.
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#![feature(tool_lints)]
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#![warn(clippy::all)]
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#![allow(unused)]
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fn the_answer(ref mut x: u8) {
*x = 42;
}
fn main() {
let mut x = 0;
the_answer(x);
// Closures should not warn
let y = |ref x| { println!("{:?}", x) };
y(1u8);
let ref x = 1;
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let ref y: (&_, u8) = (&1, 2);
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let ref z = 1 + 2;
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let ref mut z = 1 + 2;
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let (ref x, _) = (1,2); // okay, not top level
println!("The answer is {}.", x);
}