Struct wayland_client::UserData

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pub struct UserData { /* private fields */ }

Expand description

A wrapper for user data, able to store any type, and correctly handling access from a wrong thread

Implementations

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impl UserData

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pub const fn new() -> UserData

Create a new UserData instance

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pub fn set<T, F>(&self, f: F) where
T: 'static + Any,
F: FnOnce() -> T,

Sets the UserData to a given value

The provided closure is called to init the UserData, does nothing is the UserData had already been set.

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pub fn set_threadsafe<T, F>(&self, f: F) where
T: 'static + Any + Send + Sync,
F: FnOnce() -> T,

Sets the UserData to a given threadsafe value

The provided closure is called to init the UserData, does nothing is the UserData had already been set.

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pub fn get<T>(&self) -> Option<&T> where
T: 'static,

Attempt to access the wrapped user data

Will return None if either:

The requested type T does not match the type used for construction
This UserData has been created using the non-threadsafe variant and access is attempted from an other thread than the one it was created on

Trait Implementations

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impl Debug for UserData

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

Formats the value using the given formatter. Read more

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impl Drop for UserData

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fn drop(&mut self)

Executes the destructor for this type. Read more

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impl Send for UserData

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impl Sync for UserData

Auto Trait Implementations

impl !RefUnwindSafe for UserData

impl Unpin for UserData

impl !UnwindSafe for UserData

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> Downcast for T where
T: Any,

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fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait. Read more

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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait. Read more

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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s. Read more

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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s. Read more

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impl<T> DowncastSync for T where
T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync + 'static>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait. 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, 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 wayland_client::UserData

Implementations

impl UserData

pub const fn new() -> UserData

pub fn set<T, F>(&self, f: F) where T: 'static + Any, F: FnOnce() -> T,

pub fn set_threadsafe<T, F>(&self, f: F) where T: 'static + Any + Send + Sync, F: FnOnce() -> T,

pub fn get<T>(&self) -> Option<&T> where T: 'static,

Trait Implementations

impl Debug for UserData

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

impl Drop for UserData

fn drop(&mut self)

impl Send for UserData

impl Sync for UserData

Auto Trait Implementations

impl !RefUnwindSafe for UserData

impl Unpin for UserData

impl !UnwindSafe for UserData

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> Downcast for T where T: Any,

fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>

fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>

fn as_any(&self) -> &(dyn Any + 'static)

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

impl<T> DowncastSync for T where T: Any + Send + Sync,

fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync + 'static>

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, 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>

pub fn set<T, F>(&self, f: F) where
T: 'static + Any,
F: FnOnce() -> T,

pub fn set_threadsafe<T, F>(&self, f: F) where
T: 'static + Any + Send + Sync,
F: FnOnce() -> T,

pub fn get<T>(&self) -> Option<&T> where
T: 'static,

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> Downcast for T where
T: Any,

impl<T> DowncastSync for T where
T: Any + Send + Sync,

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

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

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