1 files changed, 26 insertions, 0 deletions
diff --git a/tests/ui/lint/unused/issue-74883-unused-paren-baren-yield.rs b/tests/ui/lint/unused/issue-74883-unused-paren-baren-yield.rs
new file mode 100644
index 000000000..8064c3a88
--- /dev/null
+++ b/tests/ui/lint/unused/issue-74883-unused-paren-baren-yield.rs
@@ -0,0 +1,26 @@
+#![feature(generator_trait)]
+#![feature(generators)]
+#![deny(unused_braces, unused_parens)]
+
+use std::ops::Generator;
+use std::pin::Pin;
+
+fn main() {
+    let mut x = |_| {
+        while let Some(_) = (yield) {}
+        while let Some(_) = {yield} {}
+
+        // Only warn these cases
+        while let Some(_) = ({yield}) {} //~ ERROR: unnecessary parentheses
+        while let Some(_) = ((yield)) {} //~ ERROR: unnecessary parentheses
+        {{yield}}; //~ ERROR: unnecessary braces
+        {( yield )}; //~ ERROR: unnecessary parentheses
+        while let Some(_) = {(yield)} {} //~ ERROR: unnecessary parentheses
+        while let Some(_) = {{yield}} {} //~ ERROR: unnecessary braces
+
+        // FIXME: It'd be great if we could also warn them.
+        ((yield));
+        ({ yield });
+    };
+    let _ = Pin::new(&mut x).resume(Some(5));
+}