[(mod_item)
 (function_item)
 (struct_item)
 (trait_item)
 (enum_item)
 (impl_item)
 (type_item)
 (union_item)

 (use_declaration)
 (let_declaration)

 (loop_expression)
 (for_expression)
 (while_expression)
 (if_expression)
 (match_expression)
 (call_expression)

 (macro_definition)
 (macro_invocation)

 (attribute_item)
] @fold
