Vendor things

third-party/vendor/swc_common/tests/spanned_attr.rs

@@ -0,0 +1,19 @@
+use swc_common::{BytePos, Span, Spanned};
+
+#[test]
+fn lo_hi() {
+    #[derive(Spanned)]
+    struct LoHi {
+        #[span(lo)]
+        pub lo: BytePos,
+        #[span(hi)]
+        pub hi: BytePos,
+    }
+
+    let lo = BytePos(0);
+    let hi = BytePos(5);
+    assert_eq!(
+        LoHi { lo, hi }.span(),
+        Span::new(lo, hi, Default::default())
+    );
+}