5 use std::mem::transmute as my_transmute;
6 use std::vec::Vec as MyVec;
12 fn my_vec() -> MyVec<i32> {
16 #[allow(clippy::needless_lifetimes, clippy::transmute_ptr_to_ptr)]
17 #[warn(clippy::useless_transmute)]
18 unsafe fn _generic<'a, T, U: 'a>(t: &'a T) {
19 let _: &'a T = core::intrinsics::transmute(t);
21 let _: &'a U = core::intrinsics::transmute(t);
23 let _: *const T = core::intrinsics::transmute(t);
25 let _: *mut T = core::intrinsics::transmute(t);
27 let _: *const U = core::intrinsics::transmute(t);
30 #[warn(clippy::useless_transmute)]
33 let _: Vec<i32> = core::intrinsics::transmute(my_vec());
35 let _: Vec<i32> = core::mem::transmute(my_vec());
37 let _: Vec<i32> = std::intrinsics::transmute(my_vec());
39 let _: Vec<i32> = std::mem::transmute(my_vec());
41 let _: Vec<i32> = my_transmute(my_vec());
43 let _: *const usize = std::mem::transmute(5_isize);
45 let _ = 5_isize as *const usize;
47 let _: *const usize = std::mem::transmute(1 + 1usize);
49 let _ = (1 + 1_usize) as *const usize;
55 #[warn(clippy::crosspointer_transmute)]
57 let mut int: Usize = Usize(0);
58 let int_const_ptr: *const Usize = &int as *const Usize;
59 let int_mut_ptr: *mut Usize = &mut int as *mut Usize;
62 let _: Usize = core::intrinsics::transmute(int_const_ptr);
64 let _: Usize = core::intrinsics::transmute(int_mut_ptr);
66 let _: *const Usize = core::intrinsics::transmute(my_int());
68 let _: *mut Usize = core::intrinsics::transmute(my_int());
72 #[warn(clippy::transmute_int_to_char)]
74 let _: char = unsafe { std::mem::transmute(0_u32) };
75 let _: char = unsafe { std::mem::transmute(0_i32) };
78 #[warn(clippy::transmute_int_to_bool)]
80 let _: bool = unsafe { std::mem::transmute(0_u8) };
83 #[warn(clippy::transmute_int_to_float)]
86 let _: f32 = unsafe { std::mem::transmute(0_u32) };
87 let _: f32 = unsafe { std::mem::transmute(0_i32) };
88 let _: f64 = unsafe { std::mem::transmute(0_u64) };
89 let _: f64 = unsafe { std::mem::transmute(0_i64) };
93 const VALUE32: f32 = unsafe { std::mem::transmute(0_u32) };
94 const VALUE64: f64 = unsafe { std::mem::transmute(0_i64) };
96 const fn from_bits_32(v: i32) -> f32 {
97 unsafe { std::mem::transmute(v) }
100 const fn from_bits_64(v: u64) -> f64 {
101 unsafe { std::mem::transmute(v) }
106 fn bytes_to_str(b: &[u8], mb: &mut [u8]) {
107 let _: &str = unsafe { std::mem::transmute(b) };
108 let _: &mut str = unsafe { std::mem::transmute(mb) };