diff options
| -rw-r--r-- | src/libcollections/borrow.rs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/libcollections/borrow.rs b/src/libcollections/borrow.rs index 1c75636cb05..a7b4c17314b 100644 --- a/src/libcollections/borrow.rs +++ b/src/libcollections/borrow.rs @@ -38,6 +38,9 @@ use self::Cow::*; /// type can be borrowed as multiple different types. In particular, `Vec<T>: /// Borrow<Vec<T>>` and `Vec<T>: Borrow<[T]>`. /// +/// If you are implementing `Borrow` and both `Self` and `Borrowed` implement +/// `Hash`, `Eq`, and/or `Ord`, they must produce the same result. +/// /// `Borrow` is very similar to, but different than, `AsRef`. See /// [the book][book] for more. /// |