Struct TypeErasedExtension 

pub struct TypeErasedExtension { /* private fields */ }

A TypeErasedExtension is a type erased item which can be stored in an Extensions

Internally the value is stored inside an Arc so this is cheap to clone

Implementations

impl TypeErasedExtension

pub fn new<T>(value: T) -> TypeErasedExtension

where T: Extension,

Create a new TypeErasedExtension for T

If the value you are inserting is an Arc<T>, prefer using Self::new_arc() to prevent the double indirection of storing an Arc<Arc<T>>. This happens because internally we use a type erased Arc to store the actual value.

pub fn new_arc<T>(value: Arc<T>) -> TypeErasedExtension

where T: Extension,

Create a new TypeErasedExtension for Arc<T>

If the value you are inserting is not an Arc<T> prefer using Self::new() instead.

pub fn type_id(&self) -> TypeId

Get the TypeId for the internally stored type Arc<T>

pub fn cloned_downcast<T>(&self) -> Option<Arc<T>>

where T: Extension,

Get a cloned Arc<T> of the internally stored type Arc<T>

This method will return None, if the internally stored type S doesn’t match the requested type T

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

where T: Extension,

Get a reference &T of the internally stored type T

This method will return None, if the internally stored type S doesn’t match the requested type T

Trait Implementations

impl Clone for TypeErasedExtension

fn clone(&self) -> TypeErasedExtension

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TypeErasedExtension

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

Formats the value using the given formatter.