converter.rb

converter "test_convert_numbers.txt" do
  def _stash_number_cache(match)
    @_number_string_cache ||= {}
    index = convert_numbers(@_number_string_cache.size.to_s)
    @_number_string_cache[index] = match
    "［＃数字キャッシュ＝#{index}］"
  end

  def _rebuild_number_cache(io)
    io.string.gsub!(/［＃数字キャッシュ＝(.+?)］/) do
      @_number_string_cache[$1]
    end
  end

  def before(io, type)
    io.string.gsub!(/[\d.]+/) do |match|
      if match.match(/\d/) && match.match(/\./)
        _stash_number_cache(match)
      else
        match
      end
    end
    io
  end

  def after(io, type)
    _rebuild_number_cache(io)
    io
  end
end