mirror of
https://github.com/rust-lang/rust-clippy
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48 lines
907 B
Rust
48 lines
907 B
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![warn(clippy::neg_multiply)]
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#![allow(clippy::no_effect, clippy::unnecessary_operation)]
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use std::ops::Mul;
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struct X;
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impl Mul<isize> for X {
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type Output = X;
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fn mul(self, _r: isize) -> Self {
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self
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}
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}
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impl Mul<X> for isize {
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type Output = X;
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fn mul(self, _r: X) -> X {
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X
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}
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}
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fn main() {
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let x = 0;
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x * -1;
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-1 * x;
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-1 * -1; // should be ok
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X * -1; // should be ok
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-1 * X; // should also be ok
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}
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