1 files changed, 11 insertions, 0 deletions
diff --git a/third_party/rust/matches/tests/macro_use_one.rs b/third_party/rust/matches/tests/macro_use_one.rs
new file mode 100644
index 0000000000..a527a89ce7
--- /dev/null
+++ b/third_party/rust/matches/tests/macro_use_one.rs
@@ -0,0 +1,11 @@
+// https://github.com/SimonSapin/rust-std-candidates/issues/12
+#[macro_use(matches)] extern crate matches;
+
+#[test]
+fn matches_works() {
+    let foo = Some("-12");
+    assert!(matches!(foo, Some(bar) if
+        matches!(bar.as_bytes()[0], b'+' | b'-') &&
+        matches!(bar.as_bytes()[1], b'0'...b'9')
+    ));
+}