Mark successors as unstable

src/stream/mod.rs

@@ -317,7 +317,6 @@ mod from_iter;
 mod once;
 mod repeat;
 mod repeat_with;
-mod successors;
 
 cfg_unstable! {
     mod double_ended_stream;
@@ -328,6 +327,7 @@ cfg_unstable! {
     mod interval;
     mod into_stream;
     mod product;
+    mod successors;
     mod sum;
 
     pub use double_ended_stream::DoubleEndedStream;
@@ -339,5 +339,6 @@ cfg_unstable! {
     pub use into_stream::IntoStream;
     pub use product::Product;
     pub use stream::Merge;
+    pub use successors::{successors, Successors};
     pub use sum::Sum;
 }

src/stream/successors.rs

@@ -16,6 +16,8 @@ pin_project! {
     /// This stream is constructed by [`successors`] function
     ///
     /// [`succcessors`]: fn.succssors.html
+    #[cfg(feature = "unstable")]
+    #[cfg_attr(feature = "docs", doc(cfg(unstable)))]
     #[derive(Debug)]
     pub struct Successors<F, Fut, T>
     where
@@ -65,6 +67,8 @@ pin_project! {
 /// # }) }
 ///
 /// ```
+#[cfg(feature = "unstable")]
+#[cfg_attr(feature = "docs", doc(cfg(unstable)))]
 pub fn successors<F, Fut, T>(first: Option<T>, succ: F) -> Successors<F, Fut, T>
 where
     F: FnMut(T) -> Fut,