#![allow(unused)] #![warn(clippy::as_ptr_cast_mut)] #![allow(clippy::wrong_self_convention, clippy::unnecessary_cast)] //@no-rustfix struct MutPtrWrapper(Vec<u8>); impl MutPtrWrapper { fn as_ptr(&mut self) -> *const u8 { self.0.as_mut_ptr() as *const u8 } } struct Covariant<T>(*const T); impl<T> Covariant<T> { fn as_ptr(self) -> *const T { self.0 } } fn main() { let mut string = String::new(); let _ = string.as_ptr() as *mut u8; //~^ ERROR: casting the result of `as_ptr` to *mut u8 //~| NOTE: `-D clippy::as-ptr-cast-mut` implied by `-D warnings` let _: *mut i8 = string.as_ptr() as *mut _; //~^ ERROR: casting the result of `as_ptr` to *mut i8 let _ = string.as_ptr() as *const i8; let _ = string.as_mut_ptr(); let _ = string.as_mut_ptr() as *mut u8; let _ = string.as_mut_ptr() as *const u8; let nn = std::ptr::NonNull::new(4 as *mut u8).unwrap(); let _ = nn.as_ptr() as *mut u8; let mut wrap = MutPtrWrapper(Vec::new()); let _ = wrap.as_ptr() as *mut u8; let mut local = 4; let ref_with_write_perm = Covariant(std::ptr::addr_of_mut!(local) as *const _); let _ = ref_with_write_perm.as_ptr() as *mut u8; }