Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/src/tools/clippy/tests/ui/if_let_mutex.rs b/src/tools/clippy/tests/ui/if_let_mutex.rs
new file mode 100644
index 000000000..6cbfafbb3
--- /dev/null
+++ b/src/tools/clippy/tests/ui/if_let_mutex.rs
@@ -0,0 +1,42 @@
+#![warn(clippy::if_let_mutex)]
+
+use std::ops::Deref;
+use std::sync::Mutex;
+
+fn do_stuff<T>(_: T) {}
+
+fn if_let() {
+    let m = Mutex::new(1_u8);
+    if let Err(locked) = m.lock() {
+        do_stuff(locked);
+    } else {
+        let lock = m.lock().unwrap();
+        do_stuff(lock);
+    };
+}
+
+// This is the most common case as the above case is pretty
+// contrived.
+fn if_let_option() {
+    let m = Mutex::new(Some(0_u8));
+    if let Some(locked) = m.lock().unwrap().deref() {
+        do_stuff(locked);
+    } else {
+        let lock = m.lock().unwrap();
+        do_stuff(lock);
+    };
+}
+
+// When mutexes are different don't warn
+fn if_let_different_mutex() {
+    let m = Mutex::new(Some(0_u8));
+    let other = Mutex::new(None::<u8>);
+    if let Some(locked) = m.lock().unwrap().deref() {
+        do_stuff(locked);
+    } else {
+        let lock = other.lock().unwrap();
+        do_stuff(lock);
+    };
+}
+
+fn main() {}