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AppearanceKey

Struct AppearanceKey

pub struct AppearanceKey;

Expand description

Key for accessing the current system appearance

Trait Implementations§

impl EnvKey for AppearanceKey

type Value = Appearance

The type of value stored in the environment

fn default_value() -> Self::Value

Get a default value for this key

Auto Trait Implementations§

impl Freeze for AppearanceKey

impl RefUnwindSafe for AppearanceKey

impl Send for AppearanceKey

impl Sync for AppearanceKey

impl Unpin for AppearanceKey

impl UnsafeUnpin for AppearanceKey

impl UnwindSafe for AppearanceKey

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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where T: ?Sized,

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Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

impl<T> Downcast for T
where T: Any,

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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.

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

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

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.

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where T: Any + Send + Sync,

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Returns the argument unchanged.

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where U: From<T>,

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Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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where T: ?Sized,

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Performs the conversion.

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