1 files changed, 69 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/explicit_into_iter_loop.fixed b/src/tools/clippy/tests/ui/explicit_into_iter_loop.fixed
new file mode 100644
index 000000000..dcef63403
--- /dev/null
+++ b/src/tools/clippy/tests/ui/explicit_into_iter_loop.fixed
@@ -0,0 +1,69 @@
+//@run-rustfix
+#![warn(clippy::explicit_into_iter_loop)]
+
+fn main() {
+    // Issue #4958
+    fn _takes_iterator<T>(iterator: &T)
+    where
+        for<'a> &'a T: IntoIterator<Item = &'a String>,
+    {
+        for _ in iterator {}
+    }
+
+    struct T;
+    impl IntoIterator for &T {
+        type Item = ();
+        type IntoIter = std::vec::IntoIter<Self::Item>;
+        fn into_iter(self) -> Self::IntoIter {
+            unimplemented!()
+        }
+    }
+
+    let mut t = T;
+    for _ in &t {}
+
+    let r = &t;
+    for _ in r {}
+
+    // No suggestion for this.
+    // We'd have to suggest `for _ in *rr {}` which is less clear.
+    let rr = &&t;
+    for _ in rr.into_iter() {}
+
+    let mr = &mut t;
+    for _ in &*mr {}
+
+    struct U;
+    impl IntoIterator for &mut U {
+        type Item = ();
+        type IntoIter = std::vec::IntoIter<Self::Item>;
+        fn into_iter(self) -> Self::IntoIter {
+            unimplemented!()
+        }
+    }
+
+    let mut u = U;
+    for _ in &mut u {}
+
+    let mr = &mut u;
+    for _ in &mut *mr {}
+
+    // Issue #6900
+    struct S;
+    impl S {
+        #[allow(clippy::should_implement_trait)]
+        pub fn into_iter<T>(self) -> I<T> {
+            unimplemented!()
+        }
+    }
+
+    struct I<T>(T);
+    impl<T> Iterator for I<T> {
+        type Item = T;
+        fn next(&mut self) -> Option<Self::Item> {
+            unimplemented!()
+        }
+    }
+
+    for _ in S.into_iter::<u32>() {}
+}