From b8a12636c5085ba46fe3e97a162fef43ee00e8ea Mon Sep 17 00:00:00 2001
From: Philippe-Cholet <phcholet@orange.fr>
Date: Thu, 9 Nov 2023 19:42:35 +0100
Subject: [PATCH] `PeekNth::fold`

---
 src/peek_nth.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/peek_nth.rs b/src/peek_nth.rs
index e8546030d..ff5a55cc0 100644
--- a/src/peek_nth.rs
+++ b/src/peek_nth.rs
@@ -152,6 +152,14 @@ where
     fn size_hint(&self) -> (usize, Option<usize>) {
         size_hint::add_scalar(self.iter.size_hint(), self.buf.len())
     }
+
+    fn fold<B, F>(self, mut init: B, mut f: F) -> B
+    where
+        F: FnMut(B, Self::Item) -> B,
+    {
+        init = self.buf.into_iter().fold(init, &mut f);
+        self.iter.fold(init, f)
+    }
 }
 
 impl<I> ExactSizeIterator for PeekNth<I> where I: ExactSizeIterator {}