parse

# File lib/csv/parser.rb, line 285
    def parse(&block)
      return to_enum(__method__) unless block_given?

      if @return_headers and @headers and @raw_headers
        headers = Row.new(@headers, @raw_headers, true)
        if @unconverted_fields
          headers = add_unconverted_fields(headers, [])
        end
        yield headers
      end

      begin
        @scanner ||= build_scanner
        if quote_character.nil?
          parse_no_quote(&block)
        elsif @need_robust_parsing
          parse_quotable_robust(&block)
        else
          parse_quotable_loose(&block)
        end
      rescue InvalidEncoding
        if @scanner
          ignore_broken_line
          lineno = @lineno
        else
          lineno = @lineno + 1
        end
        message = "Invalid byte sequence in #{@encoding}"
        raise MalformedCSVError.new(message, lineno)
      end
    end