Struct ntex_service::dev::MapErr

pub struct MapErr<A, R, F, E> { /* private fields */ }

Service for the map_err combinator, changing the type of a service’s error.

This is created by the ServiceExt::map_err method.

Trait Implementations

impl<A, R, F, E> Clone for MapErr<A, R, F, E>where A: Clone, F: Clone,

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<A, R, F, E> Service<R> for MapErr<A, R, F, E>where A: Service<R>, F: Fn(A::Error) -> E,

type Response = <A as Service<R>>::Response

Responses given by the service.

type Error = E

Errors produced by the service when polling readiness or executing call.

type Future<'f> where A: 'f, R: 'f, F: 'f, E: 'f = MapErrFuture<'f, A, R, F, E>

The future response value.

fn poll_ready(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>

Returns Ready when the service is able to process requests.

fn call(&self, req: R) -> Self::Future<'_>

Process the request and return the response asynchronously.

fn poll_shutdown(&self, cx: &mut Context<'_>) -> Poll<()>

Shutdown service.

fn map<F, Res>(self, f: F) -> Map<Self, F, Req, Res>where Self: Sized, F: Fn(Self::Response) -> Res,

Map this service’s output to a different type, returning a new service of the resulting type.

fn map_err<F, E>(self, f: F) -> MapErr<Self, Req, F, E>where Self: Sized, F: Fn(Self::Error) -> E,

Map this service’s error to a different error, returning a new service.