rust/src/test/compile-fail/no-patterns-in-args-2.rs

// Copyright 2016 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.

#![deny(patterns_in_fns_without_body)]

trait Tr {
    fn f1(mut arg: u8); //~ ERROR patterns aren't allowed in methods without bodies
                        //~^ WARN was previously accepted
    fn f2(&arg: u8); //~ ERROR patterns aren't allowed in methods without bodies
                     //~^ WARN was previously accepted
    fn g1(arg: u8); // OK
    fn g2(_: u8); // OK
    fn g3(u8); // OK
}

fn main() {}