class Haml::Parser

def next_line
  text, index = raw_next_line
  return unless text
  # :eod is a special end-of-document marker
  line =
    if text == :eod
      Line.new '-#', '-#', '-#', index, self, true
    else
      Line.new text.strip, text.lstrip.chomp, text, index, self, false
    end
  # `flat?' here is a little outdated,
  # so we have to manually check if either the previous or current line
  # closes the flat block, as well as whether a new block is opened.
  line_defined = instance_variable_defined?('@line')
  @line.tabs if line_defined
  unless (flat? && !closes_flat?(line) && !closes_flat?(@line)) ||
      (line_defined && @line.text[0] == ?: && line.full =~ %r[^#{@line.full[/^\s+/]}\s])
    return next_line if line.text.empty?
    handle_multiline(line)
  end
  @next_line = line
end