diff options
| -rw-r--r-- | src/libcollections/str.rs | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/libcollections/str.rs b/src/libcollections/str.rs index 87315fff0a0..e27c4577344 100644 --- a/src/libcollections/str.rs +++ b/src/libcollections/str.rs @@ -1646,6 +1646,10 @@ impl str { /// 'Lowercase' is defined according to the terms of the Unicode Derived Core Property /// `Lowercase`. /// + /// Since some characters can expand into multiple characters when changing + /// the case, this function returns a [`String`] instead of modifying the + /// parameter in-place. + /// /// [`String`]: string/struct.String.html /// /// # Examples @@ -1718,6 +1722,10 @@ impl str { /// 'Uppercase' is defined according to the terms of the Unicode Derived Core Property /// `Uppercase`. /// + /// Since some characters can expand into multiple characters when changing + /// the case, this function returns a [`String`] instead of modifying the + /// parameter in-place. + /// /// [`String`]: string/struct.String.html /// /// # Examples |