rust/tests/ui/unused_labels.rs

// 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.

#![allow(dead_code, clippy::items_after_statements, clippy::never_loop)]
#![warn(clippy::unused_label)]

fn unused_label() {
    'label: for i in 1..2 {
        if i > 4 {
            continue;
        }
    }
}

fn foo() {
    'same_label_in_two_fns: loop {
        break 'same_label_in_two_fns;
    }
}

fn bla() {
    'a: loop {
        break;
    }
    fn blub() {}
}

fn main() {
    'a: for _ in 0..10 {
        while let Some(42) = None {
            continue 'a;
        }
    }

    'same_label_in_two_fns: loop {
        let _ = 1;
    }
}