class Jcompiler::Provider
  def object!(arg_name = nil, &block)
    srcs, subst_src = if arg_name
                       [block.call(nil), "#{block.parameters[0][1]}=#{arg_name};"]
                     else
                       [block.call, '']
                     end
    %{"{\#{#{subst_src}[#{srcs.join(',')}].join(',')}}"}
  end

  def array!(arg_name, &block)
    item_name = block.parameters[0][1].to_s
    src = block.call(nil)
    %{"[\#{#{arg_name}.map { |#{item_name}| #{src} }.join(',')}]"}
  end

  def integer!(i)
    %{"#{i}"}
  end
end