rust/tests/ui/suspicious_arithmetic_impl.rs
Matthias Krüger 435299be30 rustfmt tests
2018-12-09 23:26:16 +01:00

81 lines
1.8 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.
#![warn(clippy::suspicious_arithmetic_impl)]
use std::ops::{Add, AddAssign, Div, Mul, Sub};
#[derive(Copy, Clone)]
struct Foo(u32);
impl Add for Foo {
type Output = Foo;
fn add(self, other: Self) -> Self {
Foo(self.0 - other.0)
}
}
impl AddAssign for Foo {
fn add_assign(&mut self, other: Foo) {
*self = *self - other;
}
}
impl Mul for Foo {
type Output = Foo;
fn mul(self, other: Foo) -> Foo {
Foo(self.0 * other.0 % 42) // OK: BinOpKind::Rem part of BiExpr as parent node
}
}
impl Sub for Foo {
type Output = Foo;
fn sub(self, other: Self) -> Self {
Foo(self.0 * other.0 - 42) // OK: BinOpKind::Mul part of BiExpr as child node
}
}
impl Div for Foo {
type Output = Foo;
fn div(self, other: Self) -> Self {
Foo(do_nothing(self.0 + other.0) / 42) // OK: BinOpKind::Add part of BiExpr as child node
}
}
struct Bar(i32);
impl Add for Bar {
type Output = Bar;
fn add(self, other: Self) -> Self {
Bar(self.0 & !other.0) // OK: UnNot part of BiExpr as child node
}
}
impl Sub for Bar {
type Output = Bar;
fn sub(self, other: Self) -> Self {
if self.0 <= other.0 {
Bar(-(self.0 & other.0)) // OK: UnNeg part of BiExpr as parent node
} else {
Bar(0)
}
}
}
fn main() {}
fn do_nothing(x: u32) -> u32 {
x
}