Introduce the GroupBy and GroupByMut Iterators

2 files changed, 3 insertions, 0 deletions

diff --git a/library/alloc/src/lib.rs b/library/alloc/src/lib.rs
index 3ac34c9ae28..34102d9c403 100644
--- a/library/alloc/src/lib.rs
+++ b/library/alloc/src/lib.rs
@@ -140,6 +140,7 @@
 #![feature(try_trait)]
 #![feature(type_alias_impl_trait)]
 #![feature(associated_type_bounds)]
+#![feature(slice_group_by)]
 // Allow testing this library
 
 #[cfg(test)]
diff --git a/library/alloc/src/slice.rs b/library/alloc/src/slice.rs
index 064700fc72c..bfa317ffd73 100644
--- a/library/alloc/src/slice.rs
+++ b/library/alloc/src/slice.rs
@@ -118,6 +118,8 @@ pub use core::slice::{RChunks, RChunksExact, RChunksExactMut, RChunksMut};
 pub use core::slice::{RSplit, RSplitMut};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::slice::{RSplitN, RSplitNMut, SplitN, SplitNMut};
+#[unstable(feature = "slice_group_by", issue = "0")]
+pub use core::slice::{GroupBy, GroupByMut};
 
 ////////////////////////////////////////////////////////////////////////////////
 // Basic slice extension methods