Auto merge of #41904 - sfackler:1.18-stabilization, r=alexcrichton

Stabilize library features for 1.18.0

Closes #38863
Closes #38980
Closes #38903
Closes #36648

r? @alexcrichton

@rust-lang/libs

5 files changed, 26 insertions, 43 deletions

diff --git a/src/libstd/collections/hash/map.rs b/src/libstd/collections/hash/map.rs
index 51d127f8ba7..8c4cbb66b45 100644
--- a/src/libstd/collections/hash/map.rs
+++ b/src/libstd/collections/hash/map.rs
@@ -1231,14 +1231,13 @@ impl<K, V, S> HashMap<K, V, S>
     /// # Examples
     ///
     /// ```
-    /// #![feature(retain_hash_collection)]
     /// use std::collections::HashMap;
     ///
     /// let mut map: HashMap<isize, isize> = (0..8).map(|x|(x, x*10)).collect();
     /// map.retain(|&k, _| k % 2 == 0);
     /// assert_eq!(map.len(), 4);
     /// ```
-    #[unstable(feature = "retain_hash_collection", issue = "36648")]
+    #[stable(feature = "retain_hash_collection", since = "1.18.0")]
     pub fn retain<F>(&mut self, mut f: F)
         where F: FnMut(&K, &mut V) -> bool
     {
diff --git a/src/libstd/collections/hash/set.rs b/src/libstd/collections/hash/set.rs
index 7215e1bde85..d80df5f18b6 100644
--- a/src/libstd/collections/hash/set.rs
+++ b/src/libstd/collections/hash/set.rs
@@ -116,8 +116,6 @@ use super::map::{self, HashMap, Keys, RandomState};
 /// [`HashMap`]: struct.HashMap.html
 /// [`PartialEq`]: ../../std/cmp/trait.PartialEq.html
 /// [`RefCell`]: ../../std/cell/struct.RefCell.html
-
-
 #[derive(Clone)]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct HashSet<T, S = RandomState> {
@@ -658,7 +656,6 @@ impl<T, S> HashSet<T, S>
     /// # Examples
     ///
     /// ```
-    /// #![feature(retain_hash_collection)]
     /// use std::collections::HashSet;
     ///
     /// let xs = [1,2,3,4,5,6];
@@ -666,7 +663,7 @@ impl<T, S> HashSet<T, S>
     /// set.retain(|&k| k % 2 == 0);
     /// assert_eq!(set.len(), 3);
     /// ```
-    #[unstable(feature = "retain_hash_collection", issue = "36648")]
+    #[stable(feature = "retain_hash_collection", since = "1.18.0")]
     pub fn retain<F>(&mut self, mut f: F)
         where F: FnMut(&T) -> bool
     {
@@ -1041,9 +1038,7 @@ impl<'a, K> FusedIterator for Iter<'a, K> {}
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl<'a, K: fmt::Debug> fmt::Debug for Iter<'a, K> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.debug_list()
-            .entries(self.clone())
-            .finish()
+        f.debug_list().entries(self.clone()).finish()
     }
 }
 
@@ -1070,10 +1065,11 @@ impl<K> FusedIterator for IntoIter<K> {}
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl<K: fmt::Debug> fmt::Debug for IntoIter<K> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let entries_iter = self.iter.inner.iter().map(|(k, _)| k);
-        f.debug_list()
-            .entries(entries_iter)
-            .finish()
+        let entries_iter = self.iter
+            .inner
+            .iter()
+            .map(|(k, _)| k);
+        f.debug_list().entries(entries_iter).finish()
     }
 }
 
@@ -1100,10 +1096,11 @@ impl<'a, K> FusedIterator for Drain<'a, K> {}
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl<'a, K: fmt::Debug> fmt::Debug for Drain<'a, K> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let entries_iter = self.iter.inner.iter().map(|(k, _)| k);
-        f.debug_list()
-            .entries(entries_iter)
-            .finish()
+        let entries_iter = self.iter
+            .inner
+            .iter()
+            .map(|(k, _)| k);
+        f.debug_list().entries(entries_iter).finish()
     }
 }
 
@@ -1143,12 +1140,10 @@ impl<'a, T, S> Iterator for Intersection<'a, T, S>
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl<'a, T, S> fmt::Debug for Intersection<'a, T, S>
     where T: fmt::Debug + Eq + Hash,
-          S: BuildHasher,
+          S: BuildHasher
 {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.debug_list()
-            .entries(self.clone())
-            .finish()
+        f.debug_list().entries(self.clone()).finish()
     }
 }
 
@@ -1202,12 +1197,10 @@ impl<'a, T, S> FusedIterator for Difference<'a, T, S>
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl<'a, T, S> fmt::Debug for Difference<'a, T, S>
     where T: fmt::Debug + Eq + Hash,
-          S: BuildHasher,
+          S: BuildHasher
 {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.debug_list()
-            .entries(self.clone())
-            .finish()
+        f.debug_list().entries(self.clone()).finish()
     }
 }
 
@@ -1243,12 +1236,10 @@ impl<'a, T, S> FusedIterator for SymmetricDifference<'a, T, S>
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl<'a, T, S> fmt::Debug for SymmetricDifference<'a, T, S>
     where T: fmt::Debug + Eq + Hash,
-          S: BuildHasher,
+          S: BuildHasher
 {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.debug_list()
-            .entries(self.clone())
-            .finish()
+        f.debug_list().entries(self.clone()).finish()
     }
 }
 
@@ -1269,12 +1260,10 @@ impl<'a, T, S> FusedIterator for Union<'a, T, S>
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl<'a, T, S> fmt::Debug for Union<'a, T, S>
     where T: fmt::Debug + Eq + Hash,
-          S: BuildHasher,
+          S: BuildHasher
 {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.debug_list()
-            .entries(self.clone())
-            .finish()
+        f.debug_list().entries(self.clone()).finish()
     }
 }
 
@@ -1698,7 +1687,7 @@ mod test_set {
 
     #[test]
     fn test_retain() {
-        let xs = [1,2,3,4,5,6];
+        let xs = [1, 2, 3, 4, 5, 6];
         let mut set: HashSet<isize> = xs.iter().cloned().collect();
         set.retain(|&k| k % 2 == 0);
         assert_eq!(set.len(), 3);
diff --git a/src/libstd/net/tcp.rs b/src/libstd/net/tcp.rs
index 34229f80769..c1493c9c6f4 100644
--- a/src/libstd/net/tcp.rs
+++ b/src/libstd/net/tcp.rs
@@ -343,7 +343,6 @@ impl TcpStream {
     /// # Examples
     ///
     /// ```no_run
-    /// #![feature(peek)]
     /// use std::net::TcpStream;
     ///
     /// let stream = TcpStream::connect("127.0.0.1:8000")
@@ -351,7 +350,7 @@ impl TcpStream {
     /// let mut buf = [0; 10];
     /// let len = stream.peek(&mut buf).expect("peek failed");
     /// ```
-    #[unstable(feature = "peek", issue = "38980")]
+    #[stable(feature = "peek", since = "1.18.0")]
     pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
         self.0.peek(buf)
     }
diff --git a/src/libstd/net/udp.rs b/src/libstd/net/udp.rs
index cdf04f7f1a4..80151dc2b44 100644
--- a/src/libstd/net/udp.rs
+++ b/src/libstd/net/udp.rs
@@ -112,7 +112,6 @@ impl UdpSocket {
     /// # Examples
     ///
     /// ```no_run
-    /// #![feature(peek)]
     /// use std::net::UdpSocket;
     ///
     /// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");
@@ -120,7 +119,7 @@ impl UdpSocket {
     /// let (number_of_bytes, src_addr) = socket.peek_from(&mut buf)
     ///                                         .expect("Didn't receive data");
     /// ```
-    #[unstable(feature = "peek", issue = "38980")]
+    #[stable(feature = "peek", since = "1.18.0")]
     pub fn peek_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
         self.0.peek_from(buf)
     }
@@ -638,7 +637,6 @@ impl UdpSocket {
     /// # Examples
     ///
     /// ```no_run
-    /// #![feature(peek)]
     /// use std::net::UdpSocket;
     ///
     /// let socket = UdpSocket::bind("127.0.0.1:34254").expect("couldn't bind to address");
@@ -649,7 +647,7 @@ impl UdpSocket {
     ///     Err(e) => println!("peek function failed: {:?}", e),
     /// }
     /// ```
-    #[unstable(feature = "peek", issue = "38980")]
+    #[stable(feature = "peek", since = "1.18.0")]
     pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> {
         self.0.peek(buf)
     }
diff --git a/src/libstd/process.rs b/src/libstd/process.rs
index d0e7defbbbb..da64704efba 100644
--- a/src/libstd/process.rs
+++ b/src/libstd/process.rs
@@ -928,8 +928,6 @@ impl Child {
     /// Basic usage:
     ///
     /// ```no_run
-    /// #![feature(process_try_wait)]
-    ///
     /// use std::process::Command;
     ///
     /// let mut child = Command::new("ls").spawn().unwrap();
@@ -944,7 +942,7 @@ impl Child {
     ///     Err(e) => println!("error attempting to wait: {}", e),
     /// }
     /// ```
-    #[unstable(feature = "process_try_wait", issue = "38903")]
+    #[stable(feature = "process_try_wait", since = "1.18.0")]
     pub fn try_wait(&mut self) -> io::Result<Option<ExitStatus>> {
         Ok(self.handle.try_wait()?.map(ExitStatus))
     }