make service no_std

actix-service/src/and_then.rs

@@ -1,8 +1,11 @@
-use std::future::Future;
+use alloc::rc::Rc;
-use std::pin::Pin;
+use core::{
-use std::rc::Rc;
+    cell::RefCell,
-use std::task::{Context, Poll};
+    future::Future,
-use std::{cell::RefCell, marker::PhantomData};
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
 
 use super::{Service, ServiceFactory};
 
@@ -254,9 +257,11 @@ where
 
 #[cfg(test)]
 mod tests {
-    use std::cell::Cell;
+    use alloc::rc::Rc;
-    use std::rc::Rc;
+    use core::{
-    use std::task::{Context, Poll};
+        cell::Cell,
+        task::{Context, Poll},
+    };
 
     use futures_util::future::{lazy, ok, ready, Ready};
 

actix-service/src/and_then_apply_fn.rs

@@ -1,9 +1,11 @@
-use std::cell::RefCell;
+use alloc::rc::Rc;
-use std::future::Future;
+use core::{
-use std::marker::PhantomData;
+    cell::RefCell,
-use std::pin::Pin;
+    future::Future,
-use std::rc::Rc;
+    marker::PhantomData,
-use std::task::{Context, Poll};
+    pin::Pin,
+    task::{Context, Poll},
+};
 
 use crate::{Service, ServiceFactory};
 

actix-service/src/apply.rs

@@ -1,4 +1,4 @@
-use std::{
+use core::{
     future::Future,
     marker::PhantomData,
     pin::Pin,
@@ -207,7 +207,7 @@ where
 
 #[cfg(test)]
 mod tests {
-    use std::task::Poll;
+    use core::task::Poll;
 
     use futures_util::future::{lazy, ok, Ready};
 

actix-service/src/apply_cfg.rs

@@ -1,9 +1,11 @@
-use std::cell::RefCell;
+use alloc::rc::Rc;
-use std::future::Future;
+use core::{
-use std::marker::PhantomData;
+    cell::RefCell,
-use std::pin::Pin;
+    future::Future,
-use std::rc::Rc;
+    marker::PhantomData,
-use std::task::{Context, Poll};
+    pin::Pin,
+    task::{Context, Poll},
+};
 
 use crate::{Service, ServiceFactory};
 

actix-service/src/boxed.rs

@@ -1,6 +1,10 @@
-use std::pin::Pin;
+use alloc::boxed::Box;
-use std::task::{Context, Poll};
+use core::{
-use std::{future::Future, marker::PhantomData};
+    future::Future,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
 
 use futures_util::future::FutureExt;
 
@@ -28,7 +32,7 @@ where
 {
     BoxServiceFactory(Box::new(FactoryWrapper {
         factory,
-        _t: std::marker::PhantomData,
+        _t: PhantomData,
     }))
 }
 

actix-service/src/fn_service.rs

@@ -1,6 +1,4 @@
-use std::future::Future;
+use core::{future::Future, marker::PhantomData, task::Poll};
-use std::marker::PhantomData;
-use std::task::Poll;
 
 use futures_util::future::{ok, Ready};
 
@@ -357,7 +355,7 @@ where
 
 #[cfg(test)]
 mod tests {
-    use std::task::Poll;
+    use core::task::Poll;
 
     use futures_util::future::{lazy, ok};
 

actix-service/src/lib.rs

@@ -1,15 +1,19 @@
 //! See [`Service`] docs for information on this crate's foundational trait.
 
+#![no_std]
 #![deny(rust_2018_idioms, nonstandard_style)]
 #![allow(clippy::type_complexity)]
 #![doc(html_logo_url = "https://actix.rs/img/logo.png")]
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
-use std::cell::RefCell;
+extern crate alloc;
-use std::future::Future;
+
-use std::rc::Rc;
+use alloc::{boxed::Box, rc::Rc, sync::Arc};
-use std::sync::Arc;
+use core::{
-use std::task::{self, Context, Poll};
+    cell::RefCell,
+    future::Future,
+    task::{self, Context, Poll},
+};
 
 mod and_then;
 mod and_then_apply_fn;
@@ -365,8 +369,8 @@ macro_rules! always_ready {
     () => {
         fn poll_ready(
             &mut self,
-            _: &mut ::std::task::Context<'_>,
+            _: &mut ::core::task::Context<'_>,
-        ) -> ::std::task::Poll<Result<(), Self::Error>> {
+        ) -> ::core::task::Poll<Result<(), Self::Error>> {
             Poll::Ready(Ok(()))
         }
     };
@@ -377,8 +381,8 @@ macro_rules! forward_ready {
     ($field:ident) => {
         fn poll_ready(
             &mut self,
-            cx: &mut ::std::task::Context<'_>,
+            cx: &mut ::core::task::Context<'_>,
-        ) -> ::std::task::Poll<Result<(), Self::Error>> {
+        ) -> ::core::task::Poll<Result<(), Self::Error>> {
             self.$field.poll_ready(cx)
         }
     };

actix-service/src/map.rs

@@ -1,7 +1,9 @@
-use std::future::Future;
+use core::{
-use std::marker::PhantomData;
+    future::Future,
-use std::pin::Pin;
+    marker::PhantomData,
-use std::task::{Context, Poll};
+    pin::Pin,
+    task::{Context, Poll},
+};
 
 use super::{Service, ServiceFactory};
 

actix-service/src/map_config.rs

@@ -1,4 +1,4 @@
-use std::marker::PhantomData;
+use core::marker::PhantomData;
 
 use super::{IntoServiceFactory, ServiceFactory};
 

actix-service/src/map_err.rs

@@ -1,7 +1,9 @@
-use std::future::Future;
+use core::{
-use std::marker::PhantomData;
+    future::Future,
-use std::pin::Pin;
+    marker::PhantomData,
-use std::task::{Context, Poll};
+    pin::Pin,
+    task::{Context, Poll},
+};
 
 use super::{Service, ServiceFactory};
 

actix-service/src/map_init_err.rs

@@ -1,7 +1,9 @@
-use std::future::Future;
+use core::{
-use std::marker::PhantomData;
+    future::Future,
-use std::pin::Pin;
+    marker::PhantomData,
-use std::task::{Context, Poll};
+    pin::Pin,
+    task::{Context, Poll},
+};
 
 use super::ServiceFactory;
 

actix-service/src/pipeline.rs

@@ -1,5 +1,8 @@
-use std::task::{Context, Poll};
+use core::{
-use std::{future::Future, marker::PhantomData};
+    future::Future,
+    marker::PhantomData,
+    task::{Context, Poll},
+};
 
 use crate::and_then::{AndThenService, AndThenServiceFactory};
 use crate::and_then_apply_fn::{AndThenApplyFn, AndThenApplyFnFactory};

actix-service/src/then.rs

@@ -1,8 +1,11 @@
-use std::future::Future;
+use alloc::rc::Rc;
-use std::pin::Pin;
+use core::{
-use std::rc::Rc;
+    cell::RefCell,
-use std::task::{Context, Poll};
+    future::Future,
-use std::{cell::RefCell, marker::PhantomData};
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
 
 use super::{Service, ServiceFactory};
 
@@ -236,9 +239,11 @@ where
 
 #[cfg(test)]
 mod tests {
-    use std::cell::Cell;
+    use alloc::rc::Rc;
-    use std::rc::Rc;
+    use core::{
-    use std::task::{Context, Poll};
+        cell::Cell,
+        task::{Context, Poll},
+    };
 
     use futures_util::future::{err, lazy, ok, ready, Ready};
 

actix-service/src/transform.rs

@@ -1,8 +1,10 @@
-use std::pin::Pin;
+use alloc::{rc::Rc, sync::Arc};
-use std::rc::Rc;
+use core::{
-use std::sync::Arc;
+    future::Future,
-use std::task::{Context, Poll};
+    marker::PhantomData,
-use std::{future::Future, marker::PhantomData};
+    pin::Pin,
+    task::{Context, Poll},
+};
 
 use crate::transform_err::TransformMapInitErr;
 use crate::{IntoServiceFactory, Service, ServiceFactory};

actix-service/src/transform_err.rs

@@ -1,7 +1,9 @@
-use std::future::Future;
+use core::{
-use std::marker::PhantomData;
+    future::Future,
-use std::pin::Pin;
+    marker::PhantomData,
-use std::task::{Context, Poll};
+    pin::Pin,
+    task::{Context, Poll},
+};
 
 use super::Transform;
 

actix-tracing/src/lib.rs

@@ -4,7 +4,7 @@
 #![doc(html_logo_url = "https://actix.rs/img/logo.png")]
 #![doc(html_favicon_url = "https://actix.rs/favicon.ico")]
 
-use std::marker::PhantomData;
+use core::marker::PhantomData;
 
 use actix_service::{
     apply, dev::ApplyTransform, IntoServiceFactory, Service, ServiceFactory, Transform,