Struct WeakPtr

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#[repr(C)]
pub struct WeakPtr<T>where
    T: WeakPtrTarget,
{ /* private fields */ }

Expand description

Binding to C++ std::weak_ptr<T>.

The typical way to construct a WeakPtr from Rust is by downgrading from a SharedPtr.

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impl<T> WeakPtr<T>
where T: WeakPtrTarget,

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pub fn null() -> WeakPtr<T>

Makes a new WeakPtr wrapping a null pointer.

Matches the behavior of default-constructing a std::weak_ptr.

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pub fn upgrade(&self) -> SharedPtr<T>
where T: SharedPtrTarget,

Upgrades a non-owning reference into an owning reference if possible, otherwise to a null reference.

Matches the behavior of std::weak_ptr<T>::lock.

Trait Implementations§

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impl<T> Clone for WeakPtr<T>
where T: WeakPtrTarget,

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fn clone(&self) -> WeakPtr<T>

Returns a copy of the value. Read more

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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl<T> Debug for WeakPtr<T>
where T: Debug + WeakPtrTarget + SharedPtrTarget,

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fn fmt(&self, formatter: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more

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impl<T> Drop for WeakPtr<T>
where T: WeakPtrTarget,

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fn drop(&mut self)

Executes the destructor for this type. Read more

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impl<T> Send for WeakPtr<T>
where T: Send + Sync + WeakPtrTarget,

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impl<T> Sync for WeakPtr<T>
where T: Send + Sync + WeakPtrTarget,

Auto Trait Implementations§

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

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut u8)

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

Performs copy-assignment from self to dst. 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> FromRef<T> for T
where T: Clone,

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fn from_ref(input: &T) -> T

Converts to this type from a reference to the input type.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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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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