Struct ReadOnlyCell

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#[repr(transparent)]
pub struct ReadOnlyCell<T: Element>(UnsafeCell<T>);

Available on non-Py_LIMITED_API or Py_3_11 only.

Expand description

Like std::cell::Cell, but only provides read-only access to the data.

&ReadOnlyCell<T> is basically a safe version of *const T: The data cannot be modified through the reference, but other references may be modifying the data.

Tuple Fields§

§0: UnsafeCell<T>

Implementations§

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impl<T: Element> ReadOnlyCell<T>

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pub fn get(&self) -> T

Returns a copy of the current value.

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pub fn as_ptr(&self) -> *const T

Returns a pointer to the current value.

Auto Trait Implementations§

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impl<T> UnwindSafe for ReadOnlyCell<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> AssertNotZeroSized for T

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const _CONDITION: usize = _

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const _CHECK: &'static str = _

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fn assert_not_zero_sized(&self)

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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 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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