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// Copyright 2018 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.
// must-compile-successfully
#![warn(unused_attributes)] //~ NOTE lint level defined here
fn foo() {
match 0 {
#[derive(Debug)] //~ WARN unused attribute
_ => (),
}
}
fn main() {
// fold_stmt (Item)
#[allow(dead_code)]
#[derive(Debug)] // should not warn
struct Foo;
// fold_stmt (Mac)
#[derive(Debug)]
//~^ WARN `#[derive]` does nothing on macro invocations
//~| NOTE this may become a hard error in a future release
println!("Hello, world!");
// fold_stmt (Semi)
#[derive(Debug)] //~ WARN unused attribute
"Hello, world!";
// fold_stmt (Local)
#[derive(Debug)] //~ WARN unused attribute
let _ = "Hello, world!";
let _ = [
// fold_opt_expr
#[derive(Debug)] //~ WARN unused attribute
"Hello, world!"
];
}
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