Struct Annotation 

pub struct Annotation { /* private fields */ }

A type-erased application annotation carried by an annotated compositing region. The value remains strongly typed at the API boundary: consumers query it with LayerTree::find_annotation and receive only values of the requested concrete type. Native platform adapters can therefore project their own typed metadata without making the renderer depend on a platform crate.

Implementations

impl Annotation

pub fn new<T: Any>(value: T) -> Self

pub const fn value_type_id(&self) -> TypeId

pub fn downcast_ref<T: Any>(&self) -> Option<&T>

pub fn cloned<T: Any + Clone>(&self) -> Option<T>

Trait Implementations

impl Clone for Annotation

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Annotation

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

Formats the value using the given formatter.

impl PartialEq for Annotation

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.