Union executorch_sys::torch::executor::optional_storage_t

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#[repr(C)]
pub union optional_storage_t<T> {
    pub dummy_: ManuallyDrop<c_uchar>,
    pub value_: ManuallyDrop<T>,
    pub _phantom_0: PhantomData<UnsafeCell<T>>,
}
Expand description

A wrapper type that lets us avoid constructing a T when there is no value. If there is a value present, the optional class must destroy it.

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§dummy_: ManuallyDrop<c_uchar>

A small, trivially-constructable alternative to T.

§value_: ManuallyDrop<T>

The constructed value itself, if optional::has_value_ is true.

§_phantom_0: PhantomData<UnsafeCell<T>>

Auto Trait Implementations§

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impl<T> Freeze for optional_storage_t<T>
where T: Freeze,

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impl<T> !RefUnwindSafe for optional_storage_t<T>

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impl<T> Send for optional_storage_t<T>
where T: Send,

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impl<T> !Sync for optional_storage_t<T>

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impl<T> Unpin for optional_storage_t<T>
where T: Unpin,

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impl<T> UnwindSafe for optional_storage_t<T>
where T: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.