From: Martin Elzen <martinelzen@...>
Date: 2005-07-26T21:48:10+09:00
Subject: defining to_s works oddly?


Hi all.  Am I the only one that finds it odd that if I define a to_s 
function for a class, that if I do:
puts obj

I won't get errors, but if I try something like:
s = String.new
s += obj

I get a 'can not convert a <class type>' into String type error'...

It's no prob to write obj.to_s, it's just I expected the first version to 
call to_s automatically...

Martin

PS for clarity, my complete error producing example is as follows:

class Animal

  def initialize(name)
    fail "name is nil" if name.nil?

    @name = name
  end


  def to_s
    "#{@name}"
  end

end



c = Animal.new('Snoes')

puts c

puts "substituted in a string literal: #{c}"


s = String.new
s += c

#puts s