rust/tests/ui/unit_cmp.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.

#![warn(clippy::unit_cmp)]
#![allow(clippy::no_effect, clippy::unnecessary_operation)]

#[derive(PartialEq)]
pub struct ContainsUnit(()); // should be fine

fn main() {
    // this is fine
    if true == false {}

    // this warns
    if {
        true;
    } == {
        false;
    } {}

    if {
        true;
    } > {
        false;
    } {}
}