1 files changed, 68 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/deref_addrof.rs b/src/tools/clippy/tests/ui/deref_addrof.rs
new file mode 100644
index 000000000..49f360b9a
--- /dev/null
+++ b/src/tools/clippy/tests/ui/deref_addrof.rs
@@ -0,0 +1,68 @@
+// run-rustfix
+#![allow(clippy::return_self_not_must_use)]
+#![warn(clippy::deref_addrof)]
+
+fn get_number() -> usize {
+    10
+}
+
+fn get_reference(n: &usize) -> &usize {
+    n
+}
+
+#[allow(clippy::double_parens)]
+#[allow(unused_variables, unused_parens)]
+fn main() {
+    let a = 10;
+    let aref = &a;
+
+    let b = *&a;
+
+    let b = *&get_number();
+
+    let b = *get_reference(&a);
+
+    let bytes: Vec<usize> = vec![1, 2, 3, 4];
+    let b = *&bytes[1..2][0];
+
+    //This produces a suggestion of 'let b = (a);' which
+    //will trigger the 'unused_parens' lint
+    let b = *&(a);
+
+    let b = *(&a);
+
+    #[rustfmt::skip]
+    let b = *((&a));
+
+    let b = *&&a;
+
+    let b = **&aref;
+
+    let _ = unsafe { *core::ptr::addr_of!(a) };
+}
+
+#[rustfmt::skip]
+macro_rules! m {
+    ($visitor: expr) => {
+        *& $visitor
+    };
+}
+
+#[rustfmt::skip]
+macro_rules! m_mut {
+    ($visitor: expr) => {
+        *& mut $visitor
+    };
+}
+
+#[derive(Copy, Clone)]
+pub struct S;
+impl S {
+    pub fn f(&self) -> &Self {
+        m!(self)
+    }
+    #[allow(unused_mut)] // mut will be unused, once the macro is fixed
+    pub fn f_mut(mut self) -> Self {
+        m_mut!(self)
+    }
+}