From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../unboxed-closures/unboxed-closure-feature-gate.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 src/test/ui/unboxed-closures/unboxed-closure-feature-gate.rs

(limited to 'src/test/ui/unboxed-closures/unboxed-closure-feature-gate.rs')

diff --git a/src/test/ui/unboxed-closures/unboxed-closure-feature-gate.rs b/src/test/ui/unboxed-closures/unboxed-closure-feature-gate.rs
new file mode 100644
index 000000000..d8b201bf8
--- /dev/null
+++ b/src/test/ui/unboxed-closures/unboxed-closure-feature-gate.rs
@@ -0,0 +1,20 @@
+// Check that parenthetical notation is feature-gated except with the
+// `Fn` traits.
+
+use std::marker;
+
+trait Foo<A> {
+    type Output;
+
+    fn dummy(&self, a: A) { }
+}
+
+fn main() {
+    let x: Box<dyn Foo(isize)>;
+    //~^ ERROR parenthetical notation is only stable when used with `Fn`-family
+
+    // No errors with these:
+    let x: Box<dyn Fn(isize)>;
+    let x: Box<dyn FnMut(isize)>;
+    let x: Box<dyn FnOnce(isize)>;
+}
-- 
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