CSV::Parser#parse_unquoted_column_value

# File tmp/rubies/ruby-3.1.3/lib/csv/parser.rb, line 1122
def parse_unquoted_column_value
  value = @scanner.scan_all(@unquoted_value)
  return nil unless value

  @unquoted_column_value = true
  if @first_column_separators
    while true
      @scanner.keep_start
      is_column_end = @column_ends.all? do |column_end|
        @scanner.scan(column_end)
      end
      @scanner.keep_back
      break if is_column_end
      sub_separator = @scanner.scan_all(@first_column_separators)
      break if sub_separator.nil?
      value << sub_separator
      sub_value = @scanner.scan_all(@unquoted_value)
      break if sub_value.nil?
      value << sub_value
    end
  end
  value.gsub!(@backslash_quote_character, @quote_character) if @backslash_quote
  if @rstrip_value
    value.gsub!(@rstrip_value, "")
  end
  value
end