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Simplify transform trait, remove map_init_err

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This commit is contained in:
Nikolay Kim 2019-11-19 06:51:43 +06:00
parent 8bf8ad86d6
commit 5b74c79cf9
2 changed files with 1 additions and 100 deletions
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2
actix-service/src/lib.rs
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@ -298,5 +298,5 @@ pub mod dev {
pub use crate::map_err::{MapErr, MapErrServiceFactory};
pub use crate::map_init_err::MapInitErr;
pub use crate::then::{ThenService, ThenServiceFactory};
pub use crate::transform::{ApplyTransform, TransformMapInitErr};
pub use crate::transform::ApplyTransform;
}

99
actix-service/src/transform.rs
View File

@ -1,5 +1,4 @@
use std::future::Future;
use std::marker::PhantomData;
use std::pin::Pin;
use std::rc::Rc;
use std::sync::Arc;
@ -37,17 +36,6 @@ pub trait Transform<S> {
/// Creates and returns a new Service component, asynchronously
fn new_transform(&self, service: S) -> Self::Future;
/// Map this service's factory error to a different error,
/// returning a new transform service factory.
fn map_init_err<F, E>(self, f: F) -> TransformMapInitErr<Self, S, F, E>
where
Self: Sized,
Self::Future: Unpin,
F: Fn(Self::InitError) -> E + Unpin + Clone,
{
TransformMapInitErr::new(self, f)
}
}
impl<T, S> Transform<S> for Rc<T>
@ -187,90 +175,3 @@ where
}
}
}
/// Transform for the `map_err` combinator, changing the type of a new
/// transform's init error.
///
/// This is created by the `Transform::map_err` method.
pub struct TransformMapInitErr<T, S, F, E> {
t: T,
f: F,
e: PhantomData<(S, E)>,
}
impl<T, S, F, E> TransformMapInitErr<T, S, F, E> {
/// Create new `TransformMapErr` new transform instance
pub(crate) fn new(t: T, f: F) -> Self
where
T: Transform<S>,
T::Future: Unpin,
F: Fn(T::InitError) -> E + Unpin + Clone,
{
Self {
t,
f,
e: PhantomData,
}
}
}
impl<T, S, F, E> Clone for TransformMapInitErr<T, S, F, E>
where
T: Clone,
F: Clone,
{
fn clone(&self) -> Self {
Self {
t: self.t.clone(),
f: self.f.clone(),
e: PhantomData,
}
}
}
impl<T, S, F, E> Transform<S> for TransformMapInitErr<T, S, F, E>
where
T: Transform<S>,
T::Future: Unpin,
F: Fn(T::InitError) -> E + Unpin + Clone,
{
type Request = T::Request;
type Response = T::Response;
type Error = T::Error;
type Transform = T::Transform;
type InitError = E;
type Future = TransformMapInitErrFuture<T, S, F, E>;
fn new_transform(&self, service: S) -> Self::Future {
TransformMapInitErrFuture {
fut: self.t.new_transform(service),
f: self.f.clone(),
}
}
}
pub struct TransformMapInitErrFuture<T, S, F, E>
where
T: Transform<S>,
T::Future: Unpin,
F: Fn(T::InitError) -> E + Unpin,
{
fut: T::Future,
f: F,
}
impl<T, S, F, E> Future for TransformMapInitErrFuture<T, S, F, E>
where
T: Transform<S>,
T::Future: Unpin,
F: Fn(T::InitError) -> E + Unpin + Clone,
{
type Output = Result<T::Transform, E>;
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
let this = self.get_mut();
Pin::new(&mut this.fut).poll(cx).map_err(&this.f)
}
}