class RDoc::Markup::PreProcess

def handle text, code_object = nil, &block
  first_line = 1
  if RDoc::Comment === text then
    comment = text
    text = text.text
    first_line = comment.line || 1
  end
  # regexp helper (square brackets for optional)
  # $1      $2  $3        $4      $5
  # [prefix][\]:directive:[spaces][param]newline
  text = text.lines.map.with_index(first_line) do |line, num|
    next line unless line =~ /\A([ \t]*(?:#|\/?\*)?[ \t]*)(\\?):([\w-]+):([ \t]*)(.+)?(\r?\n|$)/
    # skip something like ':toto::'
    next $& if $4.empty? and $5 and $5[0, 1] == ':'
    # skip if escaped
    next "#$1:#$3:#$4#$5\n" unless $2.empty?
    # This is not in handle_directive because I didn't want to pass another
    # argument into it
    if comment and $3 == 'markup' then
      next "#{$1.strip}\n" unless $5
      comment.format = $5.downcase
      next "#{$1.strip}\n"
    end
    handle_directive $1, $3, $5, code_object, text.encoding, num, &block
  end.join
  if comment then
    comment.text = text
  else
    comment = text
  end
  self.class.post_processors.each do |handler|
    handler.call comment, code_object
  end
  text
end