CSV::Parser#emit_row

# File tmp/rubies/ruby-3.3.0/lib/csv/parser.rb, line 1251
def emit_row(row, quoted_fields, &block)
  @lineno += 1

  raw_row = row
  if @use_headers
    if @headers.nil?
      @headers = adjust_headers(row, quoted_fields)
      return unless @return_headers
      row = Row.new(@headers, row, true)
    else
      row = Row.new(@headers,
                    @fields_converter.convert(raw_row, @headers, @lineno, quoted_fields))
    end
  else
    # convert fields, if needed...
    row = @fields_converter.convert(raw_row, nil, @lineno, quoted_fields)
  end

  # inject unconverted fields and accessor, if requested...
  if @unconverted_fields and not row.respond_to?(:unconverted_fields)
    add_unconverted_fields(row, raw_row)
  end

  yield(row)
end