rust/tests/ui/diverging_sub_expression.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.

#![feature(never_type)]
#![warn(clippy::diverging_sub_expression)]
#![allow(clippy::match_same_arms, clippy::logic_bug)]

#[allow(clippy::empty_loop)]
fn diverge() -> ! {
    loop {}
}

struct A;

impl A {
    fn foo(&self) -> ! {
        diverge()
    }
}

#[allow(unused_variables, clippy::unnecessary_operation, clippy::short_circuit_statement)]
fn main() {
    let b = true;
    b || diverge();
    b || A.foo();
}

#[allow(dead_code, unused_variables)]
fn foobar() {
    loop {
        let x = match 5 {
            4 => return,
            5 => continue,
            6 => true || return,
            7 => true || continue,
            8 => break,
            9 => diverge(),
            3 => true || diverge(),
            10 => match 42 {
                99 => return,
                _ => true || panic!("boo"),
            },
            _ => true || break,
        };
    }
}