module Parser module ModuleDef include Parslet rule(:module_definition) do keyword_module >> module_name >> ( (keyword_end.absent? >> root_body).repeat()).as(:module_expressions) >> keyword_end end rule(:class_definition) do keyword_class >> module_name >> (smaller >> module_name).maybe.as(:derived_name) >> ( (keyword_end.absent? >> root_body).repeat()).as(:class_expressions) >> keyword_end end end end