Rollup merge of #84221 - ABouttefeux:generic-arg-elision, r=estebank

[rust.git] / src / tools / clippy / tests / ui / clone_on_copy.rs

diff --git a/src/tools/clippy/tests/ui/clone_on_copy.rs b/src/tools/clippy/tests/ui/clone_on_copy.rs
index 97f4946724458d5955f1d82b7ade9345f0a750b8..f15501f71844f0ceb1b9f4a59acd5e5952e30540 100644 (file)
--- a/src/tools/clippy/tests/ui/clone_on_copy.rs
+++ b/src/tools/clippy/tests/ui/clone_on_copy.rs
@@ -6,7 +6,8 @@
     clippy::deref_addrof,
     clippy::no_effect,
     clippy::unnecessary_operation,
-    clippy::vec_init_then_push
+    clippy::vec_init_then_push,
+    clippy::toplevel_ref_arg
 )]
 
 use std::cell::RefCell;
@@ -29,6 +30,37 @@ fn clone_on_copy() {
     let rc = RefCell::new(0);
     rc.borrow().clone();
 
+    let x = 0u32;
+    x.clone().rotate_left(1);
+
+    #[derive(Clone, Copy)]
+    struct Foo;
+    impl Foo {
+        fn clone(&self) -> u32 {
+            0
+        }
+    }
+    Foo.clone(); // ok, this is not the clone trait
+
+    macro_rules! m {
+        ($e:expr) => {{ $e }};
+    }
+    m!(42).clone();
+
+    struct Wrap([u32; 2]);
+    impl core::ops::Deref for Wrap {
+        type Target = [u32; 2];
+        fn deref(&self) -> &[u32; 2] {
+            &self.0
+        }
+    }
+    let x = Wrap([0, 0]);
+    x.clone()[0];
+
+    let x = 42;
+    let ref y = x.clone(); // ok, binds by reference
+    let ref mut y = x.clone(); // ok, binds by reference
+
     // Issue #4348
     let mut x = 43;
     let _ = &x.clone(); // ok, getting a ref