Add str::split_at_mut

1 files changed, 6 insertions, 0 deletions

diff --git a/src/libcollections/str.rs b/src/libcollections/str.rs
index 711e2887865..306a8ba3e09 100644
--- a/src/libcollections/str.rs
+++ b/src/libcollections/str.rs
@@ -793,6 +793,12 @@ impl str {
         core_str::StrExt::split_at(self, mid)
     }
 
+    /// Divide one mutable string slice into two at an index.
+    #[inline]
+    pub fn split_at_mut(&mut self, mid: usize) -> (&mut str, &mut str) {
+        core_str::StrExt::split_at_mut(self, mid)
+    }
+
     /// An iterator over the codepoints of `self`.
     ///
     /// # Examples