soml-parser/lib/parser/module_definition.rb

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