Diff: implement Debug and Clone

src/diff.rs

@@ -5,6 +5,8 @@
 //! describes the difference between two non-`Clone` iterators `I` and `J` after breaking ASAP from
 //! a lock-step comparison.
 
+use std::fmt;
+
 use crate::free::put_back;
 use crate::structs::PutBack;
 
@@ -26,6 +28,43 @@ where
  Longer(usize, PutBack<J>),
 }
 
+impl<I, J> fmt::Debug for Diff<I, J>
+where
+ I: Iterator,
+ J: Iterator,
+ PutBack<I>: fmt::Debug,
+ PutBack<J>: fmt::Debug,
+{
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ match self {
+ Self::FirstMismatch(idx, i, j) => f
+ .debug_tuple("FirstMismatch")
+ .field(idx)
+ .field(i)
+ .field(j)
+ .finish(),
+ Self::Shorter(idx, i) => f.debug_tuple("Shorter").field(idx).field(i).finish(),
+ Self::Longer(idx, j) => f.debug_tuple("Longer").field(idx).field(j).finish(),
+ }
+ }
+}
+
+impl<I, J> Clone for Diff<I, J>
+where
+ I: Iterator,
+ J: Iterator,
+ PutBack<I>: Clone,
+ PutBack<J>: Clone,
+{
+ fn clone(&self) -> Self {
+ match self {
+ Self::FirstMismatch(idx, i, j) => Self::FirstMismatch(*idx, i.clone(), j.clone()),
+ Self::Shorter(idx, i) => Self::Shorter(*idx, i.clone()),
+ Self::Longer(idx, j) => Self::Longer(*idx, j.clone()),
+ }
+ }
+}
+
 /// Compares every element yielded by both `i` and `j` with the given function in lock-step and
 /// returns a [`Diff`] which describes how `j` differs from `i`.
 ///