rust/tests/ui/transmute_ptr_to_ref.rs

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2020-01-20 03:16:50 +01:00
#![warn(clippy::transmute_ptr_to_ref)]
unsafe fn _ptr_to_ref<T, U>(p: *const T, m: *mut T, o: *const U, om: *mut U) {
let _: &T = std::mem::transmute(p);
let _: &T = &*p;
let _: &mut T = std::mem::transmute(m);
let _: &mut T = &mut *m;
let _: &T = std::mem::transmute(m);
let _: &T = &*m;
let _: &mut T = std::mem::transmute(p as *mut T);
let _ = &mut *(p as *mut T);
let _: &T = std::mem::transmute(o);
let _: &T = &*(o as *const T);
let _: &mut T = std::mem::transmute(om);
let _: &mut T = &mut *(om as *mut T);
let _: &T = std::mem::transmute(om);
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 { std::mem::transmute::<_, &Foo<_>>(raw) };
let _: &Foo<&u8> = unsafe { std::mem::transmute::<_, &Foo<&_>>(raw) };
type Bar<'a> = &'a u8;
let raw = 42 as *const i32;
unsafe { std::mem::transmute::<_, Bar>(raw) };
}
fn main() {}