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
|
#![warn(clippy::transmute_ptr_to_ref)]
#![allow(
clippy::match_single_binding,
clippy::unnecessary_cast,
clippy::missing_transmute_annotations
)]
fn ptr_to_ref<T, U>(p: *const T, m: *mut T, o: *const U, om: *mut U) {
unsafe {
let _: &T = &*p;
//~^ transmute_ptr_to_ref
let _: &T = &*p;
let _: &mut T = &mut *m;
//~^ transmute_ptr_to_ref
let _: &mut T = &mut *m;
let _: &T = &*m;
//~^ transmute_ptr_to_ref
let _: &T = &*m;
let _: &mut T = &mut *(p as *mut T);
//~^ transmute_ptr_to_ref
let _ = &mut *(p as *mut T);
let _: &T = &*(o as *const T);
//~^ transmute_ptr_to_ref
let _: &T = &*(o as *const T);
let _: &mut T = &mut *(om as *mut T);
//~^ transmute_ptr_to_ref
let _: &mut T = &mut *(om as *mut T);
let _: &T = &*(om as *const T);
//~^ transmute_ptr_to_ref
let _: &T = &*(om as *const T);
}
}
fn issue1231() {
struct Foo<'a, T> {
bar: &'a T,
}
let raw = 42 as *const i32;
let _: &Foo<u8> = unsafe { &*raw.cast::<Foo<_>>() };
//~^ transmute_ptr_to_ref
let _: &Foo<&u8> = unsafe { &*raw.cast::<Foo<&_>>() };
//~^ transmute_ptr_to_ref
type Bar<'a> = &'a u8;
let raw = 42 as *const i32;
unsafe { &*(raw as *const u8) };
//~^ transmute_ptr_to_ref
}
fn issue8924<'a, 'b, 'c>(x: *const &'a u32, y: *const &'b u32) -> &'c &'b u32 {
unsafe {
match 0 {
0 => &*x.cast::<&u32>(),
//~^ transmute_ptr_to_ref
1 => &*y.cast::<&u32>(),
//~^ transmute_ptr_to_ref
2 => &*x.cast::<&'b u32>(),
//~^ transmute_ptr_to_ref
_ => &*y.cast::<&'b u32>(),
//~^ transmute_ptr_to_ref
}
}
}
#[clippy::msrv = "1.38"]
fn meets_msrv<'a, 'b, 'c>(x: *const &'a u32) -> &'c &'b u32 {
unsafe {
let a = 0u32;
let a = &a as *const u32;
let _: &u32 = &*a;
//~^ transmute_ptr_to_ref
let _: &u32 = &*a.cast::<u32>();
//~^ transmute_ptr_to_ref
match 0 {
0 => &*x.cast::<&u32>(),
//~^ transmute_ptr_to_ref
_ => &*x.cast::<&'b u32>(),
//~^ transmute_ptr_to_ref
}
}
}
#[clippy::msrv = "1.37"]
fn under_msrv<'a, 'b, 'c>(x: *const &'a u32) -> &'c &'b u32 {
unsafe {
let a = 0u32;
let a = &a as *const u32;
let _: &u32 = &*a;
//~^ transmute_ptr_to_ref
let _: &u32 = &*(a as *const u32);
//~^ transmute_ptr_to_ref
match 0 {
0 => &*(x as *const () as *const &u32),
//~^ transmute_ptr_to_ref
_ => &*(x as *const () as *const &'b u32),
//~^ transmute_ptr_to_ref
}
}
}
// handle DSTs
fn issue13357(ptr: *const [i32], s_ptr: *const &str, a_s_ptr: *const [&str]) {
unsafe {
// different types, without erased regions
let _ = &*(ptr as *const [u32]);
//~^ transmute_ptr_to_ref
let _: &[u32] = &*(ptr as *const [u32]);
//~^ transmute_ptr_to_ref
// different types, with erased regions
let _ = &*(a_s_ptr as *const [&[u8]]);
//~^ transmute_ptr_to_ref
let _: &[&[u8]] = &*(a_s_ptr as *const [&[u8]]);
//~^ transmute_ptr_to_ref
// same type, without erased regions
let _ = &*(ptr as *const [i32]);
//~^ transmute_ptr_to_ref
let _: &[i32] = &*ptr;
//~^ transmute_ptr_to_ref
// same type, with erased regions
let _ = &*(a_s_ptr as *const [&str]);
//~^ transmute_ptr_to_ref
let _: &[&str] = &*(a_s_ptr as *const [&str]);
//~^ transmute_ptr_to_ref
}
}
fn main() {}
|
