Move race feature from std to default

This makes the race feature completely independent from the std feature.

Signed-off-by: John Nunley <dev@notgull.net>

Cargo.toml

@@ -20,8 +20,8 @@ categories = ["asynchronous", "concurrency"]
 exclude = ["/.*"]
 
 [features]
-default = ["std"]
-std = ["alloc", "fastrand/std", "futures-io", "parking", "memchr", "race", "waker-fn"]
+default = ["race", "std"]
+std = ["alloc", "fastrand/std", "futures-io", "parking", "memchr", "waker-fn"]
 alloc = []
 race = ["fastrand"]
 

src/future.rs

@@ -477,7 +477,7 @@ where
 /// let res = future::race(ready(1), ready(2)).await;
 /// # })
 /// ```
-#[cfg(feature = "std")]
+#[cfg(all(feature = "race", feature = "std"))]
 pub fn race<T, F1, F2>(future1: F1, future2: F2) -> Race<F1, F2>
 where
     F1: Future<Output = T>,
@@ -680,7 +680,7 @@ pub trait FutureExt: Future {
     /// let res = ready(1).race(ready(2)).await;
     /// # })
     /// ```
-    #[cfg(feature = "std")]
+    #[cfg(all(feature = "std", feature = "race"))]
     fn race<F>(self, other: F) -> Race<Self, F>
     where
         Self: Sized,

src/stream.rs

@@ -1750,7 +1750,7 @@ pub trait StreamExt: Stream {
     /// let res = once(1).race(once(2)).next().await;
     /// # })
     /// ```
-    #[cfg(feature = "std")]
+    #[cfg(all(feature = "std", feature = "race"))]
     fn race<S>(self, other: S) -> Race<Self, S>
     where
         Self: Sized,
@@ -2376,7 +2376,7 @@ where
 /// let res = stream::race(once(1), once(2)).next().await;
 /// # })
 /// ```
-#[cfg(feature = "std")]
+#[cfg(all(feature = "std", feature = "race"))]
 pub fn race<T, S1, S2>(stream1: S1, stream2: S2) -> Race<S1, S2>
 where
     S1: Stream<Item = T>,