class SyntaxTree::Int

def format(q)
  if !value.start_with?(/\+?0/) && value.length >= 5 && !value.include?("_")
    # If it's a plain integer and it doesn't have any underscores separating
    # the values, then we're going to insert them every 3 characters
    # starting from the right.
    index = (value.length + 2) % 3
    q.text("  #{value}"[index..].scan(/.../).join("_").strip)
  else
    q.text(value)
  end
end