compose.rb

# do
class CString
  def initialize(string)
    @string = string.to_s
  end

  def to_s
    "comp:to_s - #{@string}"
  end
end

# don't
class IString < String
  def to_s
    "int:to_s - #{self}"
  end
end

c = CString.new("composed")
i = IString.new("inherited")

c.to_s
# => comp:to_s - composed

i.to_s
# => int:to_s - inherited

puts c
comp:to_s - composed
# => nil

puts i
int:to_s - inherited
# => nil

Finally able to catch up on this today, I see your point. Well done. #bookmarked