From ef24de24a82fe681581cc130f342363c47c0969a Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 7 Jun 2024 07:48:48 +0200
Subject: Merging upstream version 1.75.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../derivative/tests/rustc-deriving-copyclone.rs   | 61 ++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 vendor/derivative/tests/rustc-deriving-copyclone.rs

(limited to 'vendor/derivative/tests/rustc-deriving-copyclone.rs')

diff --git a/vendor/derivative/tests/rustc-deriving-copyclone.rs b/vendor/derivative/tests/rustc-deriving-copyclone.rs
new file mode 100644
index 000000000..873263386
--- /dev/null
+++ b/vendor/derivative/tests/rustc-deriving-copyclone.rs
@@ -0,0 +1,61 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Test that #[derive(Copy, Clone)] produces a shallow copy
+//! even when a member violates RFC 1521
+
+#![allow(clippy::clone_on_copy)]
+
+#[cfg(feature = "use_core")]
+extern crate core;
+
+#[macro_use]
+extern crate derivative;
+
+use std::sync::atomic::{AtomicBool, Ordering};
+
+/// A struct that pretends to be Copy, but actually does something
+/// in its Clone impl
+#[derive(Copy)]
+struct Liar;
+
+/// Static cooperating with the rogue Clone impl
+static CLONED: AtomicBool = AtomicBool::new(false);
+
+impl Clone for Liar {
+    fn clone(&self) -> Self {
+        // this makes Clone vs Copy observable
+        CLONED.store(true, Ordering::SeqCst);
+
+        *self
+    }
+}
+
+/// This struct is actually Copy... at least, it thinks it is!
+#[derive(Copy, Clone)]
+struct TheirTheir(Liar);
+
+#[derive(Derivative)]
+#[derivative(Copy, Clone)]
+struct OurOur1(Liar);
+#[derive(Derivative)]
+#[derivative(Clone, Copy)]
+struct OurOur2(Liar);
+
+#[test]
+fn main() {
+    let _ = TheirTheir(Liar).clone();
+    assert!(!CLONED.load(Ordering::SeqCst), "TheirTheir");
+
+    let _ = OurOur1(Liar).clone();
+    assert!(!CLONED.load(Ordering::SeqCst), "OurOur1");
+    let _ = OurOur2(Liar).clone();
+    assert!(!CLONED.load(Ordering::SeqCst), "OurOur2");
+}
-- 
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