Struct glib::object::WeakRef

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pub struct WeakRef<T: ObjectType>(_, _);

Expand description

A weak reference to an object.

Implementations

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impl<T: ObjectType> WeakRef<T>

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pub fn new() -> WeakRef<T>

Create a new empty weak reference.

upgrade will always return None until an object is set on it.

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pub fn set(&self, obj: Option<&T>)

Set this weak reference to the given object.

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pub fn upgrade(&self) -> Option<T>

Try to upgrade this weak reference to a strong reference.

If the stored object was already destroyed or no object was set in this weak reference then None is returned.

Trait Implementations

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impl<T: ObjectType> Clone for WeakRef<T>

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fn clone(&self) -> Self

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from source. Read more

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impl<T: Debug + ObjectType> Debug for WeakRef<T>

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

Formats the value using the given formatter. Read more

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impl<T: ObjectType> Default for WeakRef<T>

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fn default() -> Self

Returns the “default value” for a type. Read more

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impl<T: ObjectType> Drop for WeakRef<T>

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fn drop(&mut self)

Executes the destructor for this type. Read more

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impl<T: ObjectType> From<WeakRef<T>> for SendWeakRef<T>

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fn from(v: WeakRef<T>) -> SendWeakRef<T>

Converts to this type from the input type.

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impl<T: Downgrade + ObjectType> Upgrade for WeakRef<T>

type Strong = T

Strong reference type.

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fn upgrade(&self) -> Option<Self::Strong>

Try upgrading a weak reference to a strong reference.

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impl<T: ObjectType + Send + Sync> Send for WeakRef<T>

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impl<T: ObjectType + Sync> Sync for WeakRef<T>

Auto Trait Implementations

impl<T> RefUnwindSafe for WeakRef<T> where
T: RefUnwindSafe,

impl<T> Unpin for WeakRef<T>

impl<T> UnwindSafe for WeakRef<T> where
T: RefUnwindSafe,

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,

const: unstable · source

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,

const: unstable · source

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

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

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> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

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

Uses borrowed data to replace owned data, usually by cloning. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Struct glib::object::WeakRef

Implementations

impl<T: ObjectType> WeakRef<T>

pub fn new() -> WeakRef<T>

pub fn set(&self, obj: Option<&T>)

pub fn upgrade(&self) -> Option<T>

Trait Implementations

impl<T: ObjectType> Clone for WeakRef<T>

fn clone(&self) -> Self

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

impl<T: Debug + ObjectType> Debug for WeakRef<T>

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

impl<T: ObjectType> Default for WeakRef<T>

fn default() -> Self

impl<T: ObjectType> Drop for WeakRef<T>

fn drop(&mut self)

impl<T: ObjectType> From<WeakRef<T>> for SendWeakRef<T>

fn from(v: WeakRef<T>) -> SendWeakRef<T>

impl<T: Downgrade + ObjectType> Upgrade for WeakRef<T>

type Strong = T

fn upgrade(&self) -> Option<Self::Strong>

impl<T: ObjectType + Send + Sync> Send for WeakRef<T>

impl<T: ObjectType + Sync> Sync for WeakRef<T>

Auto Trait Implementations

impl<T> RefUnwindSafe for WeakRef<T> where T: RefUnwindSafe,

impl<T> Unpin for WeakRef<T>

impl<T> UnwindSafe for WeakRef<T> where T: RefUnwindSafe,

Blanket Implementations

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

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> ToOwned for T where T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

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

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

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

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

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<T> RefUnwindSafe for WeakRef<T> where
T: RefUnwindSafe,

impl<T> UnwindSafe for WeakRef<T> where
T: RefUnwindSafe,

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

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

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

impl<T> ToOwned for T where
T: Clone,

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

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