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rust-clippy/tests/ui/identity_op.rs

45 lines
1.1 KiB
Rust

// 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.
const ONE: i64 = 1;
const NEG_ONE: i64 = -1;
const ZERO: i64 = 0;
#[allow(
clippy::eq_op,
clippy::no_effect,
clippy::unnecessary_operation,
clippy::double_parens
)]
#[warn(clippy::identity_op)]
#[rustfmt::skip]
fn main() {
let x = 0;
x + 0;
x + (1 - 1);
x + 1;
0 + x;
1 + x;
x - ZERO; //no error, as we skip lookups (for now)
x | (0);
((ZERO)) | x; //no error, as we skip lookups (for now)
x * 1;
1 * x;
x / ONE; //no error, as we skip lookups (for now)
x / 2; //no false positive
x & NEG_ONE; //no error, as we skip lookups (for now)
-1 & x;
let u: u8 = 0;
u & 255;
}