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Storage

Struct Storage 

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#[repr(C)]
pub struct Storage<T, D> { value: UnsafeCell<MaybeUninit<T>>, state: Cell<State<D>>, }
🔬This is a nightly-only experimental API. (thread_local_internals)

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§value: UnsafeCell<MaybeUninit<T>>
🔬This is a nightly-only experimental API. (thread_local_internals)
§state: Cell<State<D>>
🔬This is a nightly-only experimental API. (thread_local_internals)

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impl<T, D> Storage<T, D>
where D: DestroyedState,

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pub const fn new() -> Storage<T, D>

🔬This is a nightly-only experimental API. (thread_local_internals)
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pub unsafe fn get_or_init( &self, i: Option<&mut Option<T>>, f: impl FnOnce() -> T, ) -> *const T

🔬This is a nightly-only experimental API. (thread_local_internals)

Gets a pointer to the TLS value, potentially initializing it with the provided parameters. If the TLS variable has been destroyed, a null pointer is returned.

The resulting pointer may not be used after reentrant inialialization or thread destruction has occurred.

§Safety

The self reference must remain valid until the TLS destructor is run.

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unsafe fn get_or_init_slow( &self, i: Option<&mut Option<T>>, f: impl FnOnce() -> T, ) -> *const T

🔬This is a nightly-only experimental API. (thread_local_internals)
§Safety

The self reference must remain valid until the TLS destructor is run.

Auto Trait Implementations§

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impl<T, D> !Freeze for Storage<T, D>

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impl<T, D> !RefUnwindSafe for Storage<T, D>

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impl<T, D> !Sync for Storage<T, D>

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impl<T, D> Send for Storage<T, D>
where D: Send, T: Send,

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impl<T, D> Unpin for Storage<T, D>
where D: Unpin, T: Unpin,

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impl<T, D> UnsafeUnpin for Storage<T, D>
where D: UnsafeUnpin, T: UnsafeUnpin,

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impl<T, D> UnwindSafe for Storage<T, D>
where D: UnwindSafe, 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> SizeHint for T
where T: ?Sized,

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default fn lower_bound(&self) -> usize

🔬This is a nightly-only experimental API. (core_io_internals)
Returns a lower bound on the number of elements this container-like item contains. For example, an array [u8; 12] could return any value between 0 and 12 inclusively as a correct implementation. Read more
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default fn upper_bound(&self) -> Option<usize>

🔬This is a nightly-only experimental API. (core_io_internals)
Returns an upper bound on the number of elements this container-like item contains if it can be determined, otherwise None. Read more
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final fn size_hint(&self) -> (usize, Option<usize>)

🔬This is a nightly-only experimental API. (core_io_internals)
Returns an estimate for the number of elements this container like type contains. Read more
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impl<T> SizedTypeProperties for T

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#[doc(hidden)]
const SIZE: usize = _

🔬This is a nightly-only experimental API. (sized_type_properties)
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#[doc(hidden)]
const ALIGN: usize = _

🔬This is a nightly-only experimental API. (sized_type_properties)
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#[doc(hidden)]
const ALIGNMENT: Alignment = _

🔬This is a nightly-only experimental API. (ptr_alignment_type #102070)
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#[doc(hidden)]
const IS_ZST: bool = _

🔬This is a nightly-only experimental API. (sized_type_properties)
true if this type requires no storage. false if its size is greater than zero. Read more
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#[doc(hidden)]
const LAYOUT: Layout = _

🔬This is a nightly-only experimental API. (sized_type_properties)
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#[doc(hidden)]
const MAX_SLICE_LEN: usize = _

🔬This is a nightly-only experimental API. (sized_type_properties)
The largest safe length for a [Self]. Read more
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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.