Stabilize slice::rchunks(), rchunks_mut(), rchunks_exact(), rchunk_exact_mut()

Fixes #55177

5 files changed, 33 insertions, 44 deletions

diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs
index 540a17774e5..84ca7c4fec9 100644
--- a/src/liballoc/lib.rs
+++ b/src/liballoc/lib.rs
@@ -119,7 +119,6 @@
 #![feature(const_vec_new)]
 #![feature(slice_partition_dedup)]
 #![feature(maybe_uninit)]
-#![feature(rchunks)]
 
 // Allow testing this library
 
diff --git a/src/liballoc/slice.rs b/src/liballoc/slice.rs
index 8ffc043d816..1eaff7410ea 100644
--- a/src/liballoc/slice.rs
+++ b/src/liballoc/slice.rs
@@ -125,7 +125,7 @@ pub use core::slice::{from_ref, from_mut};
 pub use core::slice::SliceIndex;
 #[stable(feature = "chunks_exact", since = "1.31.0")]
 pub use core::slice::{ChunksExact, ChunksExactMut};
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 pub use core::slice::{RChunks, RChunksMut, RChunksExact, RChunksExactMut};
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/src/liballoc/tests/lib.rs b/src/liballoc/tests/lib.rs
index 5a21976d75d..6d1cfb10859 100644
--- a/src/liballoc/tests/lib.rs
+++ b/src/liballoc/tests/lib.rs
@@ -19,7 +19,6 @@
 #![feature(str_escape)]
 #![feature(try_reserve)]
 #![feature(unboxed_closures)]
-#![feature(rchunks)]
 #![feature(repeat_generic_slice)]
 
 extern crate alloc_system;
diff --git a/src/libcore/slice/mod.rs b/src/libcore/slice/mod.rs
index 628d5542ac0..8a6b212020b 100644
--- a/src/libcore/slice/mod.rs
+++ b/src/libcore/slice/mod.rs
@@ -795,8 +795,6 @@ impl<T> [T] {
     /// # Examples
     ///
     /// ```
-    /// #![feature(rchunks)]
-    ///
     /// let slice = ['l', 'o', 'r', 'e', 'm'];
     /// let mut iter = slice.rchunks(2);
     /// assert_eq!(iter.next().unwrap(), &['e', 'm']);
@@ -807,7 +805,7 @@ impl<T> [T] {
     ///
     /// [`rchunks_exact`]: #method.rchunks_exact
     /// [`chunks`]: #method.chunks
-    #[unstable(feature = "rchunks", issue = "55177")]
+    #[stable(feature = "rchunks", since = "1.31.0")]
     #[inline]
     pub fn rchunks(&self, chunk_size: usize) -> RChunks<T> {
         assert!(chunk_size != 0);
@@ -831,8 +829,6 @@ impl<T> [T] {
     /// # Examples
     ///
     /// ```
-    /// #![feature(rchunks)]
-    ///
     /// let v = &mut [0, 0, 0, 0, 0];
     /// let mut count = 1;
     ///
@@ -847,7 +843,7 @@ impl<T> [T] {
     ///
     /// [`rchunks_exact_mut`]: #method.rchunks_exact_mut
     /// [`chunks_mut`]: #method.chunks_mut
-    #[unstable(feature = "rchunks", issue = "55177")]
+    #[stable(feature = "rchunks", since = "1.31.0")]
     #[inline]
     pub fn rchunks_mut(&mut self, chunk_size: usize) -> RChunksMut<T> {
         assert!(chunk_size != 0);
@@ -875,8 +871,6 @@ impl<T> [T] {
     /// # Examples
     ///
     /// ```
-    /// #![feature(rchunks)]
-    ///
     /// let slice = ['l', 'o', 'r', 'e', 'm'];
     /// let mut iter = slice.rchunks_exact(2);
     /// assert_eq!(iter.next().unwrap(), &['e', 'm']);
@@ -887,7 +881,7 @@ impl<T> [T] {
     ///
     /// [`rchunks`]: #method.rchunks
     /// [`chunks_exact`]: #method.chunks_exact
-    #[unstable(feature = "rchunks", issue = "55177")]
+    #[stable(feature = "rchunks", since = "1.31.0")]
     #[inline]
     pub fn rchunks_exact(&self, chunk_size: usize) -> RChunksExact<T> {
         assert!(chunk_size != 0);
@@ -917,8 +911,6 @@ impl<T> [T] {
     /// # Examples
     ///
     /// ```
-    /// #![feature(rchunks)]
-    ///
     /// let v = &mut [0, 0, 0, 0, 0];
     /// let mut count = 1;
     ///
@@ -933,7 +925,7 @@ impl<T> [T] {
     ///
     /// [`rchunks_mut`]: #method.rchunks_mut
     /// [`chunks_exact_mut`]: #method.chunks_exact_mut
-    #[unstable(feature = "rchunks", issue = "55177")]
+    #[stable(feature = "rchunks", since = "1.31.0")]
     #[inline]
     pub fn rchunks_exact_mut(&mut self, chunk_size: usize) -> RChunksExactMut<T> {
         assert!(chunk_size != 0);
@@ -4256,14 +4248,14 @@ unsafe impl<'a, T> TrustedRandomAccess for ChunksExactMut<'a, T> {
 /// [`rchunks`]: ../../std/primitive.slice.html#method.rchunks
 /// [slices]: ../../std/primitive.slice.html
 #[derive(Debug)]
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 pub struct RChunks<'a, T:'a> {
     v: &'a [T],
     chunk_size: usize
 }
 
 // FIXME(#26925) Remove in favor of `#[derive(Clone)]`
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> Clone for RChunks<'a, T> {
     fn clone(&self) -> RChunks<'a, T> {
         RChunks {
@@ -4273,7 +4265,7 @@ impl<'a, T> Clone for RChunks<'a, T> {
     }
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> Iterator for RChunks<'a, T> {
     type Item = &'a [T];
 
@@ -4337,7 +4329,7 @@ impl<'a, T> Iterator for RChunks<'a, T> {
     }
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> DoubleEndedIterator for RChunks<'a, T> {
     #[inline]
     fn next_back(&mut self) -> Option<&'a [T]> {
@@ -4353,17 +4345,17 @@ impl<'a, T> DoubleEndedIterator for RChunks<'a, T> {
     }
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> ExactSizeIterator for RChunks<'a, T> {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
 unsafe impl<'a, T> TrustedLen for RChunks<'a, T> {}
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> FusedIterator for RChunks<'a, T> {}
 
 #[doc(hidden)]
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 unsafe impl<'a, T> TrustedRandomAccess for RChunks<'a, T> {
     unsafe fn get_unchecked(&mut self, i: usize) -> &'a [T] {
         let end = self.v.len() - i * self.chunk_size;
@@ -4387,13 +4379,13 @@ unsafe impl<'a, T> TrustedRandomAccess for RChunks<'a, T> {
 /// [`rchunks_mut`]: ../../std/primitive.slice.html#method.rchunks_mut
 /// [slices]: ../../std/primitive.slice.html
 #[derive(Debug)]
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 pub struct RChunksMut<'a, T:'a> {
     v: &'a mut [T],
     chunk_size: usize
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> Iterator for RChunksMut<'a, T> {
     type Item = &'a mut [T];
 
@@ -4461,7 +4453,7 @@ impl<'a, T> Iterator for RChunksMut<'a, T> {
     }
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> DoubleEndedIterator for RChunksMut<'a, T> {
     #[inline]
     fn next_back(&mut self) -> Option<&'a mut [T]> {
@@ -4478,17 +4470,17 @@ impl<'a, T> DoubleEndedIterator for RChunksMut<'a, T> {
     }
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> ExactSizeIterator for RChunksMut<'a, T> {}
 
 #[unstable(feature = "trusted_len", issue = "37572")]
 unsafe impl<'a, T> TrustedLen for RChunksMut<'a, T> {}
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> FusedIterator for RChunksMut<'a, T> {}
 
 #[doc(hidden)]
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 unsafe impl<'a, T> TrustedRandomAccess for RChunksMut<'a, T> {
     unsafe fn get_unchecked(&mut self, i: usize) -> &'a mut [T] {
         let end = self.v.len() - i * self.chunk_size;
@@ -4514,25 +4506,25 @@ unsafe impl<'a, T> TrustedRandomAccess for RChunksMut<'a, T> {
 /// [`remainder`]: ../../std/slice/struct.ChunksExact.html#method.remainder
 /// [slices]: ../../std/primitive.slice.html
 #[derive(Debug)]
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 pub struct RChunksExact<'a, T:'a> {
     v: &'a [T],
     rem: &'a [T],
     chunk_size: usize
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
 impl<'a, T> RChunksExact<'a, T> {
     /// Return the remainder of the original slice that is not going to be
     /// returned by the iterator. The returned slice has at most `chunk_size-1`
     /// elements.
+    #[stable(feature = "rchunks", since = "1.31.0")]
     pub fn remainder(&self) -> &'a [T] {
         self.rem
     }
 }
 
 // FIXME(#26925) Remove in favor of `#[derive(Clone)]`
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> Clone for RChunksExact<'a, T> {
     fn clone(&self) -> RChunksExact<'a, T> {
         RChunksExact {
@@ -4543,7 +4535,7 @@ impl<'a, T> Clone for RChunksExact<'a, T> {
     }
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> Iterator for RChunksExact<'a, T> {
     type Item = &'a [T];
 
@@ -4588,7 +4580,7 @@ impl<'a, T> Iterator for RChunksExact<'a, T> {
     }
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> DoubleEndedIterator for RChunksExact<'a, T> {
     #[inline]
     fn next_back(&mut self) -> Option<&'a [T]> {
@@ -4602,7 +4594,7 @@ impl<'a, T> DoubleEndedIterator for RChunksExact<'a, T> {
     }
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> ExactSizeIterator for RChunksExact<'a, T> {
     fn is_empty(&self) -> bool {
         self.v.is_empty()
@@ -4612,11 +4604,11 @@ impl<'a, T> ExactSizeIterator for RChunksExact<'a, T> {
 #[unstable(feature = "trusted_len", issue = "37572")]
 unsafe impl<'a, T> TrustedLen for RChunksExact<'a, T> {}
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> FusedIterator for RChunksExact<'a, T> {}
 
 #[doc(hidden)]
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 unsafe impl<'a, T> TrustedRandomAccess for RChunksExact<'a, T> {
     unsafe fn get_unchecked(&mut self, i: usize) -> &'a [T] {
         let end = self.v.len() - i * self.chunk_size;
@@ -4639,24 +4631,24 @@ unsafe impl<'a, T> TrustedRandomAccess for RChunksExact<'a, T> {
 /// [`into_remainder`]: ../../std/slice/struct.ChunksExactMut.html#method.into_remainder
 /// [slices]: ../../std/primitive.slice.html
 #[derive(Debug)]
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 pub struct RChunksExactMut<'a, T:'a> {
     v: &'a mut [T],
     rem: &'a mut [T],
     chunk_size: usize
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
 impl<'a, T> RChunksExactMut<'a, T> {
     /// Return the remainder of the original slice that is not going to be
     /// returned by the iterator. The returned slice has at most `chunk_size-1`
     /// elements.
+    #[stable(feature = "rchunks", since = "1.31.0")]
     pub fn into_remainder(self) -> &'a mut [T] {
         self.rem
     }
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> Iterator for RChunksExactMut<'a, T> {
     type Item = &'a mut [T];
 
@@ -4705,7 +4697,7 @@ impl<'a, T> Iterator for RChunksExactMut<'a, T> {
     }
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> DoubleEndedIterator for RChunksExactMut<'a, T> {
     #[inline]
     fn next_back(&mut self) -> Option<&'a mut [T]> {
@@ -4720,7 +4712,7 @@ impl<'a, T> DoubleEndedIterator for RChunksExactMut<'a, T> {
     }
 }
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> ExactSizeIterator for RChunksExactMut<'a, T> {
     fn is_empty(&self) -> bool {
         self.v.is_empty()
@@ -4730,11 +4722,11 @@ impl<'a, T> ExactSizeIterator for RChunksExactMut<'a, T> {
 #[unstable(feature = "trusted_len", issue = "37572")]
 unsafe impl<'a, T> TrustedLen for RChunksExactMut<'a, T> {}
 
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 impl<'a, T> FusedIterator for RChunksExactMut<'a, T> {}
 
 #[doc(hidden)]
-#[unstable(feature = "rchunks", issue = "55177")]
+#[stable(feature = "rchunks", since = "1.31.0")]
 unsafe impl<'a, T> TrustedRandomAccess for RChunksExactMut<'a, T> {
     unsafe fn get_unchecked(&mut self, i: usize) -> &'a mut [T] {
         let end = self.v.len() - i * self.chunk_size;
diff --git a/src/libcore/tests/lib.rs b/src/libcore/tests/lib.rs
index affcdbea9d3..965bd545eed 100644
--- a/src/libcore/tests/lib.rs
+++ b/src/libcore/tests/lib.rs
@@ -34,7 +34,6 @@
 #![feature(trusted_len)]
 #![feature(try_from)]
 #![feature(try_trait)]
-#![feature(rchunks)]
 #![feature(align_offset)]
 #![feature(reverse_bits)]
 #![feature(inner_deref)]