Struct Extension 

pub struct Extension<T>(pub T);

Available on crate feature extensions only.

An Extractor that returns the extension of the given type. If the extension is not found, the handler won’t be called and an error log will be print if the tracing feature is enabled.

You can use MaybeExtension if the extensions you are requesting may not exists.

Tuple Fields

0: T

Trait Implementations

impl<T> Deref for Extension<T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<T> DerefMut for Extension<T>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl<A: Adapter, T: Clone + Send + Sync + 'static> FromConnectParts<A> for Extension<T>

type Error = ExtensionNotFound<T>

The error type returned by the extractor

fn from_connect_parts( s: &Arc<Socket<A>>, _: &Option<Value>, ) -> Result<Self, ExtensionNotFound<T>>

Extract the arguments from the connect event. If it fails, the handler is not called

impl<A: Adapter, T: Clone + Send + Sync + 'static> FromDisconnectParts<A> for Extension<T>

type Error = ExtensionNotFound<T>

The error type returned by the extractor

fn from_disconnect_parts( s: &Arc<Socket<A>>, _: DisconnectReason, ) -> Result<Self, ExtensionNotFound<T>>

Extract the arguments from the disconnect event. If it fails, the handler is not called

impl<A: Adapter, T: Clone + Send + Sync + 'static> FromMessageParts<A> for Extension<T>

type Error = ExtensionNotFound<T>

The error type returned by the extractor

fn from_message_parts( s: &Arc<Socket<A>>, _: &mut Value, _: &Option<i64>, ) -> Result<Self, ExtensionNotFound<T>>

Extract the arguments from the message event. If it fails, the handler is not called.