Rust: expand attribute macros on AssocItem

Author: redsun82

rust/downgrades/ecb8241bf0be2db7cde671a45c2912c72672422a/downgrade.ql

@@ -0,0 +1,7 @@
+class Element extends @element {
+  string toString() { none() }
+}
+
+query predicate new_item_attribute_macro_expansions(Element id, Element attribute_macro_expansion) {
+  expandable_item_attribute_macro_expansions(id, attribute_macro_expansion) and id instanceof @item
+}