Update upstream source from tag 'upstream/1.52.1+dfsg1'

[rustc.git] / src / tools / clippy / tests / ui / needless_borrowed_ref.fixed

diff --git a/src/tools/clippy/tests/ui/needless_borrowed_ref.fixed b/src/tools/clippy/tests/ui/needless_borrowed_ref.fixed
new file mode 100644 (file)
index 0000000..a0937a2
--- /dev/null
+++ b/src/tools/clippy/tests/ui/needless_borrowed_ref.fixed
@@ -0,0 +1,45 @@
+// run-rustfix
+
+#[warn(clippy::needless_borrowed_reference)]
+#[allow(unused_variables)]
+fn main() {
+    let mut v = Vec::<String>::new();
+    let _ = v.iter_mut().filter(|a| a.is_empty());
+    //                            ^ should be linted
+
+    let var = 3;
+    let thingy = Some(&var);
+    if let Some(&ref v) = thingy {
+        //          ^ should be linted
+    }
+
+    let mut var2 = 5;
+    let thingy2 = Some(&mut var2);
+    if let Some(&mut ref mut v) = thingy2 {
+        //          ^ should **not** be linted
+        // v is borrowed as mutable.
+        *v = 10;
+    }
+    if let Some(&mut ref v) = thingy2 {
+        //          ^ should **not** be linted
+        // here, v is borrowed as immutable.
+        // can't do that:
+        //*v = 15;
+    }
+}
+
+#[allow(dead_code)]
+enum Animal {
+    Cat(u64),
+    Dog(u64),
+}
+
+#[allow(unused_variables)]
+#[allow(dead_code)]
+fn foo(a: &Animal, b: &Animal) {
+    match (a, b) {
+        (&Animal::Cat(v), &ref k) | (&ref k, &Animal::Cat(v)) => (), // lifetime mismatch error if there is no '&ref'
+        //                  ^    and   ^ should **not** be linted
+        (&Animal::Dog(ref a), &Animal::Dog(_)) => (), //              ^ should **not** be linted
+    }
+}