| 1 | use super::*;
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| 2 |
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| 3 | // Note(Lokathor): This is the neat part!!
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| 4 | unsafe impl<T: ZeroableInOption> Zeroable for Option<T> {}
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| 5 |
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| 6 | /// Trait for types which are [Zeroable](Zeroable) when wrapped in
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| 7 | /// [Option](core::option::Option).
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| 8 | ///
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| 9 | /// ## Safety
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| 10 | ///
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| 11 | /// * `Option<YourType>` must uphold the same invariants as
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| 12 | /// [Zeroable](Zeroable).
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| 13 | pub unsafe trait ZeroableInOption: Sized {}
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| 14 |
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| 15 | unsafe impl ZeroableInOption for NonZeroI8 {}
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| 16 | unsafe impl ZeroableInOption for NonZeroI16 {}
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| 17 | unsafe impl ZeroableInOption for NonZeroI32 {}
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| 18 | unsafe impl ZeroableInOption for NonZeroI64 {}
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| 19 | unsafe impl ZeroableInOption for NonZeroI128 {}
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| 20 | unsafe impl ZeroableInOption for NonZeroIsize {}
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| 21 | unsafe impl ZeroableInOption for NonZeroU8 {}
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| 22 | unsafe impl ZeroableInOption for NonZeroU16 {}
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| 23 | unsafe impl ZeroableInOption for NonZeroU32 {}
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| 24 | unsafe impl ZeroableInOption for NonZeroU64 {}
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| 25 | unsafe impl ZeroableInOption for NonZeroU128 {}
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| 26 | unsafe impl ZeroableInOption for NonZeroUsize {}
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| 27 |
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| 28 | // Note: this does not create NULL vtable because we get `None` anyway.
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| 29 | unsafe impl<T: ?Sized> ZeroableInOption for NonNull<T> {}
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| 30 | unsafe impl<T: ?Sized> ZeroableInOption for &'_ T {}
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| 31 | unsafe impl<T: ?Sized> ZeroableInOption for &'_ mut T {}
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| 32 |
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| 33 | #[cfg (feature = "extern_crate_alloc" )]
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| 34 | #[cfg_attr (feature = "nightly_docs" , doc(cfg(feature = "extern_crate_alloc" )))]
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| 35 | unsafe impl<T: ?Sized> ZeroableInOption for alloc::boxed::Box<T> {}
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| 36 | |
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