Suggest swapping the order of `ref` and `box`

3 files changed, 36 insertions, 0 deletions

diff --git a/tests/ui/pattern/pattern-bad-ref-box-order.fixed b/tests/ui/pattern/pattern-bad-ref-box-order.fixed
new file mode 100644
index 00000000000..8825744a08b
--- /dev/null
+++ b/tests/ui/pattern/pattern-bad-ref-box-order.fixed
@@ -0,0 +1,14 @@
+// run-rustfix
+
+#![feature(box_patterns)]
+#![allow(dead_code)]
+
+fn foo(f: Option<Box<i32>>) {
+    match f {
+        Some(box ref _i) => {},
+        //~^ ERROR switch the order of `ref` and `box`
+        None => {}
+    }
+}
+
+fn main() { }
diff --git a/tests/ui/pattern/pattern-bad-ref-box-order.rs b/tests/ui/pattern/pattern-bad-ref-box-order.rs
new file mode 100644
index 00000000000..f3fcf0ceacf
--- /dev/null
+++ b/tests/ui/pattern/pattern-bad-ref-box-order.rs
@@ -0,0 +1,14 @@
+// run-rustfix
+
+#![feature(box_patterns)]
+#![allow(dead_code)]
+
+fn foo(f: Option<Box<i32>>) {
+    match f {
+        Some(ref box _i) => {},
+        //~^ ERROR switch the order of `ref` and `box`
+        None => {}
+    }
+}
+
+fn main() { }
diff --git a/tests/ui/pattern/pattern-bad-ref-box-order.stderr b/tests/ui/pattern/pattern-bad-ref-box-order.stderr
new file mode 100644
index 00000000000..a49f05c1028
--- /dev/null
+++ b/tests/ui/pattern/pattern-bad-ref-box-order.stderr
@@ -0,0 +1,8 @@
+error: switch the order of `ref` and `box`
+  --> $DIR/pattern-bad-ref-box-order.rs:8:14
+   |
+LL |         Some(ref box _i) => {},
+   |              ^^^^^^^ help: swap them: `box ref`
+
+error: aborting due to 1 previous error
+