syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"ty::Adt(def_,"}]}
source_snippet:             ty::Adt(def_, args) if def_ == def => args,
context_before:         let impl_args = match *self.type_of(impl_def_id).instantiate_identity().kind() {
context_after:             _ => span_bug!(self.def_span(impl_def_id), "expected ADT for self type of `Drop` impl"),