1 files changed, 31 insertions, 0 deletions
diff --git a/tests/ui/lint/lint-struct-necessary.rs b/tests/ui/lint/lint-struct-necessary.rs
new file mode 100644
index 000000000..8bc3c1205
--- /dev/null
+++ b/tests/ui/lint/lint-struct-necessary.rs
@@ -0,0 +1,31 @@
+#![allow(dead_code)]
+#![deny(unused_parens)]
+
+enum State {
+    Waiting { start_at: u64 }
+}
+struct Foo {}
+
+fn main() {
+    let e = &mut State::Waiting { start_at: 0u64 };
+    match (&mut State::Waiting { start_at: 0u64 }) {
+        _ => {}
+    }
+
+    match (e) {
+        //~^ ERROR unnecessary parentheses around `match` scrutinee expression
+        _ => {}
+    }
+
+    match &(State::Waiting { start_at: 0u64 }) {
+        _ => {}
+    }
+
+    match (State::Waiting { start_at: 0u64 }) {
+        _ => {}
+    }
+
+    match (&&Foo {}) {
+        _ => {}
+    }
+}