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Add more Zeroable and ZeroableInOption impls (#158)

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Alphyr 2023-01-19 18:03:41 +01:00 committed by GitHub
parent f276289a9a
commit 2548e460cb
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2 changed files with 16 additions and 1 deletions
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9
src/zeroable.rs
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@ -53,8 +53,17 @@ unsafe impl Zeroable for f64 {}
unsafe impl<T: Zeroable> Zeroable for Wrapping<T> {}
unsafe impl<T: Zeroable> Zeroable for core::cmp::Reverse<T> {}
// Note: we can't implement this for all `T: ?Sized` types because it would
// create NULL pointers for vtables.
// Maybe one day this could be changed to be implemented for
// `T: ?Sized where <T as core::ptr::Pointee>::Metadata: Zeroable`.
unsafe impl<T> Zeroable for *mut T {}
unsafe impl<T> Zeroable for *const T {}
unsafe impl<T> Zeroable for *mut [T] {}
unsafe impl<T> Zeroable for *const [T] {}
unsafe impl Zeroable for *mut str {}
unsafe impl Zeroable for *const str {}
unsafe impl<T: Zeroable> Zeroable for PhantomData<T> {}
unsafe impl Zeroable for PhantomPinned {}
unsafe impl<T: Zeroable> Zeroable for ManuallyDrop<T> {}

8
src/zeroable_in_option.rs
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@ -25,4 +25,10 @@ unsafe impl ZeroableInOption for NonZeroU64 {}
unsafe impl ZeroableInOption for NonZeroU128 {}
unsafe impl ZeroableInOption for NonZeroUsize {}
unsafe impl<T> ZeroableInOption for NonNull<T> {}
// Note: this does not create NULL vtable because we get `None` anyway.
unsafe impl<T: ?Sized> ZeroableInOption for NonNull<T> {}
unsafe impl<T: ?Sized> ZeroableInOption for &'_ T {}
unsafe impl<T: ?Sized> ZeroableInOption for &'_ mut T {}
#[cfg(feature = "extern_crate_alloc")]
unsafe impl<T: ?Sized> ZeroableInOption for alloc::boxed::Box<T> {}