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|
#![allow(
clippy::assign_op_pattern,
clippy::erasing_op,
clippy::identity_op,
clippy::no_effect,
clippy::op_ref,
clippy::unnecessary_owned_empty_strings,
arithmetic_overflow,
unconditional_panic
)]
#![feature(const_mut_refs, inline_const, saturating_int_impl)]
#![warn(clippy::arithmetic_side_effects)]
use core::num::{Saturating, Wrapping};
const ONE: i32 = 1;
const ZERO: i32 = 0;
#[derive(Clone, Copy)]
pub struct Custom;
macro_rules! impl_arith {
( $( $_trait:ident, $lhs:ty, $rhs:ty, $method:ident; )* ) => {
$(
impl core::ops::$_trait<$lhs> for $rhs {
type Output = Custom;
fn $method(self, _: $lhs) -> Self::Output { todo!() }
}
)*
}
}
macro_rules! impl_assign_arith {
( $( $_trait:ident, $lhs:ty, $rhs:ty, $method:ident; )* ) => {
$(
impl core::ops::$_trait<$lhs> for $rhs {
fn $method(&mut self, _: $lhs) {}
}
)*
}
}
impl_arith!(
Add, Custom, Custom, add;
Div, Custom, Custom, div;
Mul, Custom, Custom, mul;
Rem, Custom, Custom, rem;
Sub, Custom, Custom, sub;
Add, Custom, &Custom, add;
Div, Custom, &Custom, div;
Mul, Custom, &Custom, mul;
Rem, Custom, &Custom, rem;
Sub, Custom, &Custom, sub;
Add, &Custom, Custom, add;
Div, &Custom, Custom, div;
Mul, &Custom, Custom, mul;
Rem, &Custom, Custom, rem;
Sub, &Custom, Custom, sub;
Add, &Custom, &Custom, add;
Div, &Custom, &Custom, div;
Mul, &Custom, &Custom, mul;
Rem, &Custom, &Custom, rem;
Sub, &Custom, &Custom, sub;
);
impl_assign_arith!(
AddAssign, Custom, Custom, add_assign;
DivAssign, Custom, Custom, div_assign;
MulAssign, Custom, Custom, mul_assign;
RemAssign, Custom, Custom, rem_assign;
SubAssign, Custom, Custom, sub_assign;
AddAssign, Custom, &Custom, add_assign;
DivAssign, Custom, &Custom, div_assign;
MulAssign, Custom, &Custom, mul_assign;
RemAssign, Custom, &Custom, rem_assign;
SubAssign, Custom, &Custom, sub_assign;
AddAssign, &Custom, Custom, add_assign;
DivAssign, &Custom, Custom, div_assign;
MulAssign, &Custom, Custom, mul_assign;
RemAssign, &Custom, Custom, rem_assign;
SubAssign, &Custom, Custom, sub_assign;
AddAssign, &Custom, &Custom, add_assign;
DivAssign, &Custom, &Custom, div_assign;
MulAssign, &Custom, &Custom, mul_assign;
RemAssign, &Custom, &Custom, rem_assign;
SubAssign, &Custom, &Custom, sub_assign;
);
impl core::ops::Neg for Custom {
type Output = Custom;
fn neg(self) -> Self::Output {
todo!()
}
}
impl core::ops::Neg for &Custom {
type Output = Custom;
fn neg(self) -> Self::Output {
todo!()
}
}
pub fn association_with_structures_should_not_trigger_the_lint() {
enum Foo {
Bar = -2,
}
impl Trait for Foo {
const ASSOC: i32 = {
let _: [i32; 1 + 1];
fn foo() {}
1 + 1
};
}
struct Baz([i32; 1 + 1]);
trait Trait {
const ASSOC: i32 = 1 + 1;
}
type Alias = [i32; 1 + 1];
union Qux {
field: [i32; 1 + 1],
}
let _: [i32; 1 + 1] = [0, 0];
let _: [i32; 1 + 1] = {
let a: [i32; 1 + 1] = [0, 0];
a
};
}
pub fn hard_coded_allowed() {
let _ = 1f32 + 1f32;
let _ = 1f64 + 1f64;
let _ = Saturating(0u32) + Saturating(0u32);
let _ = String::new() + "";
let _ = Wrapping(0u32) + Wrapping(0u32);
let saturating: Saturating<u32> = Saturating(0u32);
let string: String = String::new();
let wrapping: Wrapping<u32> = Wrapping(0u32);
let inferred_saturating = saturating + saturating;
let inferred_string = string + "";
let inferred_wrapping = wrapping + wrapping;
let _ = inferred_saturating + inferred_saturating;
let _ = inferred_string + "";
let _ = inferred_wrapping + inferred_wrapping;
}
#[rustfmt::skip]
pub fn const_ops_should_not_trigger_the_lint() {
const _: i32 = { let mut n = 1; n += 1; n };
let _ = const { let mut n = 1; n += 1; n };
const _: i32 = { let mut n = 1; n = n + 1; n };
let _ = const { let mut n = 1; n = n + 1; n };
const _: i32 = { let mut n = 1; n = 1 + n; n };
let _ = const { let mut n = 1; n = 1 + n; n };
const _: i32 = 1 + 1;
let _ = const { 1 + 1 };
const _: i32 = { let mut n = 1; n = -1; n = -(-1); n = -n; n };
let _ = const { let mut n = 1; n = -1; n = -(-1); n = -n; n };
}
pub fn non_overflowing_ops_or_ops_already_handled_by_the_compiler_should_not_trigger_the_lint() {
let mut _n = i32::MAX;
// Assign
_n += 0;
_n += &0;
_n -= 0;
_n -= &0;
_n += ZERO;
_n += &ZERO;
_n -= ZERO;
_n -= &ZERO;
_n /= 99;
_n /= &99;
_n %= 99;
_n %= &99;
_n *= 0;
_n *= &0;
_n *= 1;
_n *= &1;
_n *= ZERO;
_n *= &ZERO;
_n *= ONE;
_n *= &ONE;
_n += -0;
_n += &-0;
_n -= -0;
_n -= &-0;
_n += -ZERO;
_n += &-ZERO;
_n -= -ZERO;
_n -= &-ZERO;
_n /= -99;
_n /= &-99;
_n %= -99;
_n %= &-99;
_n *= -0;
_n *= &-0;
_n *= -1;
_n *= &-1;
// Binary
_n = _n + 0;
_n = _n + &0;
_n = 0 + _n;
_n = &0 + _n;
_n = _n + ZERO;
_n = _n + &ZERO;
_n = ZERO + _n;
_n = &ZERO + _n;
_n = _n - 0;
_n = _n - &0;
_n = 0 - _n;
_n = &0 - _n;
_n = _n - ZERO;
_n = _n - &ZERO;
_n = ZERO - _n;
_n = &ZERO - _n;
_n = _n / 99;
_n = _n / &99;
_n = _n % 99;
_n = _n % &99;
_n = _n * 0;
_n = _n * &0;
_n = 0 * _n;
_n = &0 * _n;
_n = _n * 1;
_n = _n * &1;
_n = ZERO * _n;
_n = &ZERO * _n;
_n = _n * ONE;
_n = _n * &ONE;
_n = 1 * _n;
_n = &1 * _n;
_n = 23 + 85;
// Unary
_n = -2147483647;
_n = -i32::MAX;
_n = -i32::MIN;
_n = -&2147483647;
_n = -&i32::MAX;
_n = -&i32::MIN;
}
pub fn unknown_ops_or_runtime_ops_that_can_overflow() {
let mut _n = i32::MAX;
let mut _custom = Custom;
// Assign
_n += 1;
_n += &1;
_n -= 1;
_n -= &1;
_n /= 0;
_n /= &0;
_n %= 0;
_n %= &0;
_n *= 2;
_n *= &2;
_n += -1;
_n += &-1;
_n -= -1;
_n -= &-1;
_n /= -0;
_n /= &-0;
_n %= -0;
_n %= &-0;
_n *= -2;
_n *= &-2;
_custom += Custom;
_custom += &Custom;
_custom -= Custom;
_custom -= &Custom;
_custom /= Custom;
_custom /= &Custom;
_custom %= Custom;
_custom %= &Custom;
_custom *= Custom;
_custom *= &Custom;
_custom += -Custom;
_custom += &-Custom;
_custom -= -Custom;
_custom -= &-Custom;
_custom /= -Custom;
_custom /= &-Custom;
_custom %= -Custom;
_custom %= &-Custom;
_custom *= -Custom;
_custom *= &-Custom;
// Binary
_n = _n + 1;
_n = _n + &1;
_n = 1 + _n;
_n = &1 + _n;
_n = _n - 1;
_n = _n - &1;
_n = 1 - _n;
_n = &1 - _n;
_n = _n / 0;
_n = _n / &0;
_n = _n % 0;
_n = _n % &0;
_n = _n * 2;
_n = _n * &2;
_n = 2 * _n;
_n = &2 * _n;
_n = 23 + &85;
_n = &23 + 85;
_n = &23 + &85;
_custom = _custom + _custom;
_custom = _custom + &_custom;
_custom = Custom + _custom;
_custom = &Custom + _custom;
_custom = _custom - Custom;
_custom = _custom - &Custom;
_custom = Custom - _custom;
_custom = &Custom - _custom;
_custom = _custom / Custom;
_custom = _custom / &Custom;
_custom = _custom % Custom;
_custom = _custom % &Custom;
_custom = _custom * Custom;
_custom = _custom * &Custom;
_custom = Custom * _custom;
_custom = &Custom * _custom;
_custom = Custom + &Custom;
_custom = &Custom + Custom;
_custom = &Custom + &Custom;
// Unary
_n = -_n;
_n = -&_n;
_custom = -_custom;
_custom = -&_custom;
}
// Copied and pasted from the `integer_arithmetic` lint for comparison.
pub fn integer_arithmetic() {
let mut i = 1i32;
let mut var1 = 0i32;
let mut var2 = -1i32;
1 + i;
i * 2;
1 % i / 2;
i - 2 + 2 - i;
-i;
i >> 1;
i << 1;
-1;
-(-1);
i & 1;
i | 1;
i ^ 1;
i += 1;
i -= 1;
i *= 2;
i /= 2;
i /= 0;
i /= -1;
i /= var1;
i /= var2;
i %= 2;
i %= 0;
i %= -1;
i %= var1;
i %= var2;
i <<= 3;
i >>= 2;
i |= 1;
i &= 1;
i ^= i;
}
fn main() {}
|
