{"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"adt_def.variant(variant_index).fields[f].ty(tcx,"}]}
                    adt_def.variant(variant_index).fields[f].ty(tcx, args)
                ty::Adt(adt_def, args) if adt_def.is_enum() => {
                }