Fix `#[expect]` for `clippy::ptr_arg`

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

diff --git a/tests/ui/needless_borrow.rs b/tests/ui/needless_borrow.rs
index 093277784beb2ea6225ecea6087ff98bd9a5130f..1d6bf46405a2f0b6cabd288c11780315f15dd9d7 100644 (file)
--- a/tests/ui/needless_borrow.rs
+++ b/tests/ui/needless_borrow.rs
@@ -1,5 +1,7 @@
 // run-rustfix
 
+#![feature(lint_reasons)]
+
 #[warn(clippy::all, clippy::needless_borrow)]
 #[allow(unused_variables, clippy::unnecessary_mut_passed)]
 fn main() {
@@ -45,6 +47,33 @@ fn main() {
         let b = &mut b;
         x(&b);
     }
+
+    // Issue #8191
+    let mut x = 5;
+    let mut x = &mut x;
+
+    mut_ref(&mut x);
+    mut_ref(&mut &mut x);
+    let y: &mut i32 = &mut x;
+    let y: &mut i32 = &mut &mut x;
+
+    let y = match 0 {
+        // Don't lint. Removing the borrow would move 'x'
+        0 => &mut x,
+        _ => &mut *x,
+    };
+
+    *x = 5;
+
+    let s = String::new();
+    // let _ = (&s).len();
+    // let _ = (&s).capacity();
+    // let _ = (&&s).capacity();
+
+    let x = (1, 2);
+    let _ = (&x).0;
+    let x = &x as *const (i32, i32);
+    let _ = unsafe { (&*x).0 };
 }
 
 #[allow(clippy::needless_borrowed_reference)]
@@ -69,3 +98,10 @@ trait Trait {}
 impl<'a> Trait for &'a str {}
 
 fn h(_: &dyn Trait) {}
+
+#[allow(dead_code)]
+fn check_expect_suppression() {
+    let a = 5;
+    #[expect(clippy::needless_borrow)]
+    let _ = x(&&a);
+}