2 #![warn(clippy::as_ptr_cast_mut)]
3 #![allow(clippy::wrong_self_convention)]
5 struct MutPtrWrapper(Vec<u8>);
7 fn as_ptr(&mut self) -> *const u8 {
8 self.0.as_mut_ptr() as *const u8
12 struct Covariant<T>(*const T);
13 impl<T> Covariant<T> {
14 fn as_ptr(self) -> *const T {
20 let mut string = String::new();
21 let _ = string.as_ptr() as *mut u8;
22 let _: *mut i8 = string.as_ptr() as *mut _;
23 let _ = string.as_ptr() as *const i8;
24 let _ = string.as_mut_ptr();
25 let _ = string.as_mut_ptr() as *mut u8;
26 let _ = string.as_mut_ptr() as *const u8;
28 let nn = std::ptr::NonNull::new(4 as *mut u8).unwrap();
29 let _ = nn.as_ptr() as *mut u8;
31 let mut wrap = MutPtrWrapper(Vec::new());
32 let _ = wrap.as_ptr() as *mut u8;
35 let ref_with_write_perm = Covariant(std::ptr::addr_of_mut!(local) as *const _);
36 let _ = ref_with_write_perm.as_ptr() as *mut u8;