fix: Stabilize stream method

Cargo.toml

@@ -35,7 +35,7 @@ default = [
   "pin-project-lite",
 ]
 docs = ["attributes", "unstable", "default"]
-unstable = ["std", "broadcaster", "futures-timer"]
+unstable = ["std", "broadcaster"]
 attributes = ["async-attributes"]
 std = [
   "alloc",

src/prelude.rs

@@ -38,16 +38,14 @@ cfg_std! {
     pub use crate::io::prelude::SeekExt as _;
     #[doc(no_inline)]
     pub use crate::io::prelude::WriteExt as _;
+
+    #[doc(no_inline)]
+    pub use crate::stream::DoubleEndedStream;
+    #[doc(no_inline)]
+    pub use crate::stream::ExactSizeStream;
 }
 
 cfg_default! {
     #[doc(no_inline)]
     pub use crate::task_local;
 }
-
-cfg_unstable! {
-    #[doc(no_inline)]
-    pub use crate::stream::DoubleEndedStream;
-    #[doc(no_inline)]
-    pub use crate::stream::ExactSizeStream;
-}

src/stream/double_ended_stream/mod.rs

@@ -1,7 +1,7 @@
 use crate::stream::Stream;
 
-use std::pin::Pin;
-use std::task::{Context, Poll};
+use core::pin::Pin;
+use core::task::{Context, Poll};
 
 mod next_back;
 mod nth_back;

src/stream/mod.rs

@@ -300,39 +300,42 @@
 //! [`take`]: trait.Stream.html#method.take
 //! [`min`]: trait.Stream.html#method.min
 
-pub use double_ended_stream::DoubleEndedStream;
 pub use empty::{empty, Empty};
-pub use exact_size_stream::ExactSizeStream;
 pub use from_fn::{from_fn, FromFn};
 pub use from_iter::{from_iter, FromIter};
-pub use fused_stream::FusedStream;
-pub use interval::{interval, Interval};
 pub use once::{once, Once};
-pub use pending::{pending, Pending};
-pub use product::Product;
 pub use repeat::{repeat, Repeat};
 pub use repeat_with::{repeat_with, RepeatWith};
-pub use stream::Merge;
 pub use stream::*;
-pub use successors::{successors, Successors};
-pub use sum::Sum;
 
 pub(crate) mod stream;
 
-mod double_ended_stream;
 mod empty;
-mod exact_size_stream;
 mod from_fn;
 mod from_iter;
-mod fused_stream;
-mod interval;
 mod once;
-mod pending;
-mod product;
 mod repeat;
 mod repeat_with;
-mod successors;
-mod sum;
+
+cfg_std! {
+    pub use double_ended_stream::DoubleEndedStream;
+    pub use exact_size_stream::ExactSizeStream;
+    pub use fused_stream::FusedStream;
+    pub use interval::{interval, Interval};
+    pub use pending::{pending, Pending};
+    pub use product::Product;
+    pub use successors::{successors, Successors};
+    pub use sum::Sum;
+
+    mod double_ended_stream;
+    mod exact_size_stream;
+    mod fused_stream;
+    mod interval;
+    mod pending;
+    mod product;
+    mod successors;
+    mod sum;
+}
 
 cfg_unstable! {
     mod from_stream;

src/stream/once.rs

@@ -5,6 +5,7 @@ use pin_project_lite::pin_project;
 use crate::stream::Stream;
 use crate::task::{Context, Poll};
 
+#[cfg(feature = "std")]
 use crate::stream::DoubleEndedStream;
 
 /// Creates a stream that yields a single item.
@@ -49,6 +50,7 @@ impl<T> Stream for Once<T> {
     }
 }
 
+#[cfg(feature = "std")]
 impl<T> DoubleEndedStream for Once<T> {
     fn poll_next_back(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
         Poll::Ready(self.project().value.take())

src/stream/product.rs

@@ -1,3 +1,4 @@
+use alloc::boxed::Box;
 use core::future::Future;
 use core::pin::Pin;
 

src/stream/stream/mod.rs

@@ -27,9 +27,7 @@ mod chain;
 mod cloned;
 mod cmp;
 mod copied;
-mod count;
 mod cycle;
-mod delay;
 mod enumerate;
 mod eq;
 mod filter;
@@ -49,7 +47,6 @@ mod map;
 mod max;
 mod max_by;
 mod max_by_key;
-mod merge;
 mod min;
 mod min_by;
 mod min_by_key;
@@ -64,17 +61,13 @@ mod skip_while;
 mod step_by;
 mod take;
 mod take_while;
-mod throttle;
-mod timeout;
 mod try_fold;
 mod try_for_each;
-mod unzip;
 mod zip;
 
 use all::AllFuture;
 use any::AnyFuture;
 use cmp::CmpFuture;
-use count::CountFuture;
 use cycle::Cycle;
 use enumerate::Enumerate;
 use eq::EqFuture;
@@ -101,33 +94,46 @@ use partial_cmp::PartialCmpFuture;
 use position::PositionFuture;
 use try_fold::TryFoldFuture;
 use try_for_each::TryForEachFuture;
-use unzip::UnzipFuture;
 
 pub use chain::Chain;
 pub use cloned::Cloned;
 pub use copied::Copied;
-pub use delay::Delay;
 pub use filter::Filter;
 pub use fuse::Fuse;
 pub use inspect::Inspect;
 pub use map::Map;
-pub use merge::Merge;
 pub use scan::Scan;
 pub use skip::Skip;
 pub use skip_while::SkipWhile;
 pub use step_by::StepBy;
 pub use take::Take;
 pub use take_while::TakeWhile;
-pub use throttle::Throttle;
-pub use timeout::{Timeout, TimeoutError};
 pub use zip::Zip;
 
 use core::cmp::Ordering;
-use core::future::Future;
-use core::pin::Pin;
-use core::time::Duration;
 
-use crate::stream::{Product, Sum};
+cfg_std! {
+    use core::time::Duration;
+    use crate::stream::{Product, Sum};
+    use alloc::boxed::Box;
+    use core::future::Future;
+    use core::pin::Pin;
+
+    use unzip::UnzipFuture;
+    use count::CountFuture;
+
+    pub use throttle::Throttle;
+    pub use merge::Merge;
+    pub use delay::Delay;
+    pub use timeout::{Timeout, TimeoutError};
+
+    mod timeout;
+    mod throttle;
+    mod merge;
+    mod delay;
+    mod unzip;
+    mod count;
+}
 
 cfg_unstable! {
     use crate::stream::FromStream;
@@ -357,6 +363,7 @@ extension_trait! {
             # }) }
             ```
         "#]
+        #[cfg(feature = "std")]
         fn throttle(self, d: Duration) -> Throttle<Self>
         where
             Self: Sized,
@@ -598,6 +605,7 @@ extension_trait! {
             # }) }
             ```
         "#]
+        #[cfg(feature = "std")]
         fn delay(self, dur: std::time::Duration) -> Delay<Self>
         where
             Self: Sized,
@@ -1652,6 +1660,7 @@ extension_trait! {
             # Ok(()) }) }
             ```
         "#]
+        #[cfg(feature = "std")]
         fn timeout(self, dur: Duration) -> Timeout<Self>
         where
             Self: Stream + Sized,
@@ -1816,6 +1825,7 @@ extension_trait! {
             # }) }
             ```
         "#]
+        #[cfg(feature = "std")]
         fn unzip<A, B, FromA, FromB>(self) -> impl Future<Output = (FromA, FromB)> [UnzipFuture<Self, FromA, FromB>]
         where
         FromA: Default + Extend<A>,
@@ -1913,6 +1923,7 @@ extension_trait! {
             # });
             ```
         "#]
+        #[cfg(feature = "std")]
         fn merge<U>(self, other: U) -> Merge<Self, U>
         where
             Self: Sized,
@@ -2058,6 +2069,7 @@ extension_trait! {
             # }) }
             ```
         "#]
+        #[cfg(feature = "std")]
         fn count(self) -> impl Future<Output = usize> [CountFuture<Self>]
         where
             Self: Sized,
@@ -2318,6 +2330,7 @@ extension_trait! {
             # }) }
             ```
         "#]
+        #[cfg(feature = "std")]
         fn sum<'a, S>(
             self,
         ) -> impl Future<Output = S> + 'a [Pin<Box<dyn Future<Output = S> + 'a>>]
@@ -2362,6 +2375,7 @@ extension_trait! {
             # }) }
             ```
         "#]
+        #[cfg(feature = "std")]
         fn product<'a, P>(
             self,
         ) -> impl Future<Output = P> + 'a [Pin<Box<dyn Future<Output = P> + 'a>>]

src/stream/sum.rs

@@ -1,3 +1,4 @@
+use alloc::boxed::Box;
 use core::future::Future;
 use core::pin::Pin;
 

src/utils.rs

@@ -21,7 +21,7 @@ pub fn abort_on_panic<T>(f: impl FnOnce() -> T) -> T {
 }
 
 /// Generates a random number in `0..n`.
-#[cfg(any(feature = "unstable", feature = "default"))]
+#[cfg(any(feature = "std", feature = "default"))]
 pub fn random(n: u32) -> u32 {
     use std::cell::Cell;
     use std::num::Wrapping;