Move MSRV tests into the lint specific test files

[rust.git] / tests / ui / swap.rs

diff --git a/tests/ui/swap.rs b/tests/ui/swap.rs
index 8518659ccf316dbbf41ce2e9941b3874c5878092..a318c27919c8a4fbdb972f59d48496c695f9e590 100644 (file)
--- a/tests/ui/swap.rs
+++ b/tests/ui/swap.rs
@@ -2,7 +2,7 @@
 
 #![warn(clippy::all)]
 #![allow(
-    clippy::blacklisted_name,
+    clippy::disallowed_names,
     clippy::no_effect,
     clippy::redundant_clone,
     redundant_semicolons,
@@ -144,3 +144,38 @@ fn main() {
     c.0 = a;
     a = t;
 }
+
+fn issue_8154() {
+    struct S1 {
+        x: i32,
+        y: i32,
+    }
+    struct S2(S1);
+    struct S3<'a, 'b>(&'a mut &'b mut S1);
+
+    impl std::ops::Deref for S2 {
+        type Target = S1;
+        fn deref(&self) -> &Self::Target {
+            &self.0
+        }
+    }
+    impl std::ops::DerefMut for S2 {
+        fn deref_mut(&mut self) -> &mut Self::Target {
+            &mut self.0
+        }
+    }
+
+    // Don't lint. `s.0` is mutably borrowed by `s.x` and `s.y` via the deref impl.
+    let mut s = S2(S1 { x: 0, y: 0 });
+    let t = s.x;
+    s.x = s.y;
+    s.y = t;
+
+    // Accessing through a mutable reference is fine
+    let mut s = S1 { x: 0, y: 0 };
+    let mut s = &mut s;
+    let s = S3(&mut s);
+    let t = s.0.x;
+    s.0.x = s.0.y;
+    s.0.y = t;
+}