PeekNth::fold

Philippe-Cholet · phimuemue · commit 298eb8bdc003 · 2023-12-15T16:18:17.000Z
diff --git 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 {}

Original file line number	Diff line number	Diff line change
`@@ -152,6 +152,14 @@ where`
`152`	`152`	`fn size_hint(&self) -> (usize, Option<usize>) {`
`153`	`153`	`size_hint::add_scalar(self.iter.size_hint(), self.buf.len())`
`154`	`154`	`}`
	`155`	`+`
	`156`	`+ fn fold<B, F>(self, mut init: B, mut f: F) -> B`
	`157`	`+ where`
	`158`	`+ F: FnMut(B, Self::Item) -> B,`
	`159`	`+ {`
	`160`	`+ init = self.buf.into_iter().fold(init, &mut f);`
	`161`	`+ self.iter.fold(init, f)`
	`162`	`+ }`
`155`	`163`	`}`
`156`	`164`
`157`	`165`	`impl<I> ExactSizeIterator for PeekNth<I> where I: ExactSizeIterator {}`