1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
#![allow(
clippy::assign_op_pattern,
clippy::erasing_op,
clippy::identity_op,
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};
pub struct Custom;
macro_rules! impl_arith {
( $( $_trait:ident, $ty:ty, $method:ident; )* ) => {
$(
impl core::ops::$_trait<$ty> for Custom {
type Output = Self;
fn $method(self, _: $ty) -> Self::Output { Self }
}
)*
}
}
impl_arith!(
Add, i32, add;
Div, i32, div;
Mul, i32, mul;
Sub, i32, sub;
Add, f64, add;
Div, f64, div;
Mul, f64, mul;
Sub, f64, sub;
);
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 /= 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 - 0;
_n = _n - &0;
_n = 0 - _n;
_n = &0 - _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 = 1 * _n;
_n = &1 * _n;
_n = 23 + 85;
// Unary
_n = -1;
_n = -(-1);
}
pub fn runtime_ops() {
let mut _n = i32::MAX;
// Assign
_n += 1;
_n += &1;
_n -= 1;
_n -= &1;
_n /= 0;
_n /= &0;
_n %= 0;
_n %= &0;
_n *= 2;
_n *= &2;
// 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
let _ = Custom + 0;
let _ = Custom + 1;
let _ = Custom + 2;
let _ = Custom + 0.0;
let _ = Custom + 1.0;
let _ = Custom + 2.0;
let _ = Custom - 0;
let _ = Custom - 1;
let _ = Custom - 2;
let _ = Custom - 0.0;
let _ = Custom - 1.0;
let _ = Custom - 2.0;
let _ = Custom / 0;
let _ = Custom / 1;
let _ = Custom / 2;
let _ = Custom / 0.0;
let _ = Custom / 1.0;
let _ = Custom / 2.0;
let _ = Custom * 0;
let _ = Custom * 1;
let _ = Custom * 2;
let _ = Custom * 0.0;
let _ = Custom * 1.0;
let _ = Custom * 2.0;
// Unary
_n = -_n;
_n = -&_n;
}
fn main() {}
|
