diff options
| -rw-r--r-- | src/lib.rs | 11 |
1 files changed, 10 insertions, 1 deletions
@@ -87,6 +87,13 @@ fn pack_size(n: u64) -> usize { } } +mod private { + /// Sealed stops crates other than byteorder from implementing any traits that use it. + pub trait Sealed{} + impl Sealed for super::LittleEndian {} + impl Sealed for super::BigEndian {} +} + /// ByteOrder describes types that can serialize integers as bytes. /// /// Note that `Self` does not appear anywhere in this trait's definition! @@ -95,6 +102,8 @@ fn pack_size(n: u64) -> usize { /// /// This crate provides two types that implement `ByteOrder`: `BigEndian` /// and `LittleEndian`. +/// This trait is sealed and cannot be implemented for callers to avoid +/// breaking backwards compatibility when adding new derived traits. /// /// # Examples /// @@ -118,7 +127,7 @@ fn pack_size(n: u64) -> usize { /// assert_eq!(-50_000, BigEndian::read_i16(&buf)); /// ``` pub trait ByteOrder - : Clone + Copy + Debug + Default + Eq + Hash + Ord + PartialEq + PartialOrd { + : Clone + Copy + Debug + Default + Eq + Hash + Ord + PartialEq + PartialOrd + private::Sealed { /// Reads an unsigned 16 bit integer from `buf`. /// /// # Panics |