class Raabro::Tree

def to_s(depth=0, io=StringIO.new)
  io.print "\n" if depth > 0
  io.print '  ' * depth
  io.print "#{@result} #{@name.inspect} #{@offset},#{@length}"
  io.print result == 1 && children.size == 0 ? ' ' + string.inspect : ''
  @children.each { |c| c.to_s(depth + 1, io) }
  depth == 0 ? io.string : nil
end