class Dry::Schema::MessageCompiler

def message_tokens(args)
  tokens = args.each_with_object({}) do |arg, hash|
    case arg[1]
    when ::Array, ::Set
      hash[arg[0]] = arg[1].join(LIST_SEPARATOR)
    when ::Range
      hash[:"#{arg[0]}_left"] = arg[1].first
      hash[:"#{arg[0]}_right"] = arg[1].last
    else
      hash[arg[0]] = arg[1]
    end
  end
  args.any? { |e| e.first == :size } ? append_mapped_size_tokens(tokens) : tokens
end