mirror of
https://github.com/fafhrd91/actix-net
synced 2024-12-01 07:30:05 +01:00
163 lines
3.4 KiB
Rust
163 lines
3.4 KiB
Rust
use std::marker::PhantomData;
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use futures::{Future, Poll};
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use super::Transform;
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/// Transform for the `map_err` combinator, changing the type of a new
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/// transform's init error.
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///
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/// This is created by the `Transform::map_err` method.
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pub struct TransformMapInitErr<T, S, F, E> {
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t: T,
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f: F,
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e: PhantomData<(S, E)>,
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}
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impl<T, S, F, E> TransformMapInitErr<T, S, F, E> {
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/// Create new `TransformMapErr` new transform instance
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pub fn new(t: T, f: F) -> Self
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where
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T: Transform<S>,
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F: Fn(T::InitError) -> E,
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{
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Self {
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t,
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f,
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e: PhantomData,
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}
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}
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}
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impl<T, S, F, E> Clone for TransformMapInitErr<T, S, F, E>
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where
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T: Clone,
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F: Clone,
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{
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fn clone(&self) -> Self {
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Self {
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t: self.t.clone(),
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f: self.f.clone(),
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e: PhantomData,
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}
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}
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}
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impl<T, S, F, E> Transform<S> for TransformMapInitErr<T, S, F, E>
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where
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T: Transform<S>,
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F: Fn(T::InitError) -> E + Clone,
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{
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type Request = T::Request;
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type Response = T::Response;
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type Error = T::Error;
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type Transform = T::Transform;
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type InitError = E;
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type Future = TransformMapInitErrFuture<T, S, F, E>;
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fn new_transform(&self, service: S) -> Self::Future {
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TransformMapInitErrFuture {
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fut: self.t.new_transform(service),
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f: self.f.clone(),
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}
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}
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}
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pub struct TransformMapInitErrFuture<T, S, F, E>
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where
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T: Transform<S>,
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F: Fn(T::InitError) -> E,
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{
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fut: T::Future,
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f: F,
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}
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impl<T, S, F, E> Future for TransformMapInitErrFuture<T, S, F, E>
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where
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T: Transform<S>,
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F: Fn(T::InitError) -> E + Clone,
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{
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type Item = T::Transform;
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type Error = E;
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fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
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self.fut.poll().map_err(&self.f)
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}
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}
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/// Transform for the `from_err` combinator, changing the type of a new
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/// transform's init error.
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///
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/// This is created by the `Transform::from_err` method.
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pub struct TransformFromErr<T, S, E> {
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t: T,
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e: PhantomData<(S, E)>,
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}
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impl<T, S, E> TransformFromErr<T, S, E>
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where
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T: Transform<S>,
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E: From<T::InitError>,
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{
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/// Create new `TransformFromErr` new transform instance
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pub fn new(t: T) -> Self {
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Self { t, e: PhantomData }
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}
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}
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impl<T, S, E> Clone for TransformFromErr<T, S, E>
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where
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T: Clone,
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{
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fn clone(&self) -> Self {
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Self {
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t: self.t.clone(),
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e: PhantomData,
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}
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}
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}
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impl<T, S, E> Transform<S> for TransformFromErr<T, S, E>
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where
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T: Transform<S>,
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E: From<T::InitError>,
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{
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type Request = T::Request;
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type Response = T::Response;
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type Error = T::Error;
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type Transform = T::Transform;
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type InitError = E;
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type Future = TransformFromErrFuture<T, S, E>;
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fn new_transform(&self, service: S) -> Self::Future {
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TransformFromErrFuture {
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fut: self.t.new_transform(service),
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_t: PhantomData,
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}
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}
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}
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pub struct TransformFromErrFuture<T, S, E>
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where
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T: Transform<S>,
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E: From<T::InitError>,
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{
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fut: T::Future,
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_t: PhantomData<E>,
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}
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impl<T, S, E> Future for TransformFromErrFuture<T, S, E>
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where
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T: Transform<S>,
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E: From<T::InitError>,
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{
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type Item = T::Transform;
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type Error = E;
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fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
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self.fut.poll().map_err(E::from)
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}
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}
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