From: Yukihiro Matsumoto <matz@...>
Date: 2008-10-07T23:57:31+09:00
Subject: Re: Difference between Foo = Class.new and class Foo

Hi,

In message "Re: Difference between Foo = Class.new and class Foo"
    on Tue, 7 Oct 2008 23:51:03 +0900, Brandon Dimcheff <bdimchef@wieldim.com> writes:

|I'm playing around with classes and discovered that
|
|class Foo
|   ...
|end
|
|and
|
|Foo = Class.new do
|   ...
|end
|
|seem to behave slightly differently.  I assumed that "class Foo" was  
|just a shortcut that got translated into "Foo = Class.new", but when I  
|muck with class in the following way:
|
|class Class
|   class << self
|     def new
|       puts "new called"
|       super
|     end
|   end
|end
|
|and then do "Foo = Class.new",  I get "new called" printed to stdout.   
|If I do "class Foo..." I get nothing.  So it seems that the "class"  
|keyword does not end up calling new on Class when you define a new  
|class.  Does anybody know what's going on here?  Is something else  
|called instead?

I think you're comparing the different code.  See the following code:

class Foo
   class << self
     def new
       puts "foo new called"
       super
     end
   end
end

Foo.new


Bar = Class.new do
   class << self
     def new
       puts "bar new called"
       super
     end
   end
end

Bar.new
-- 
							matz.