41 lines
490 B
Rust
41 lines
490 B
Rust
#![feature(plugin)]
|
|
|
|
#![plugin(clippy)]
|
|
#![deny(neg_multiply)]
|
|
#![allow(no_effect, unnecessary_operation)]
|
|
|
|
use std::ops::Mul;
|
|
|
|
struct X;
|
|
|
|
impl Mul<isize> for X {
|
|
type Output = X;
|
|
|
|
fn mul(self, _r: isize) -> Self {
|
|
self
|
|
}
|
|
}
|
|
|
|
impl Mul<X> for isize {
|
|
type Output = X;
|
|
|
|
fn mul(self, _r: X) -> X {
|
|
X
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
let x = 0;
|
|
|
|
x * -1;
|
|
|
|
|
|
-1 * x;
|
|
|
|
|
|
-1 * -1; // should be ok
|
|
|
|
X * -1; // should be ok
|
|
-1 * X; // should also be ok
|
|
}
|