From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/tools/clippy/tests/ui/copy_iterator.rs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 src/tools/clippy/tests/ui/copy_iterator.rs

(limited to 'src/tools/clippy/tests/ui/copy_iterator.rs')

diff --git a/src/tools/clippy/tests/ui/copy_iterator.rs b/src/tools/clippy/tests/ui/copy_iterator.rs
new file mode 100644
index 000000000..ae67ebded
--- /dev/null
+++ b/src/tools/clippy/tests/ui/copy_iterator.rs
@@ -0,0 +1,21 @@
+#![warn(clippy::copy_iterator)]
+
+#[derive(Copy, Clone)]
+struct Countdown(u8);
+
+impl Iterator for Countdown {
+    type Item = u8;
+
+    fn next(&mut self) -> Option<u8> {
+        self.0.checked_sub(1).map(|c| {
+            self.0 = c;
+            c
+        })
+    }
+}
+
+fn main() {
+    let my_iterator = Countdown(5);
+    assert_eq!(my_iterator.take(1).count(), 1);
+    assert_eq!(my_iterator.count(), 5);
+}
-- 
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