From: ts <decoux@...>
Date: 2003-05-26T20:29:05+09:00
Subject: Re: super, aliases, defadvice, AOP, and so on

>>>>> "Y" == Yukihiro Matsumoto <matz@ruby-lang.org> writes:

Y> and http://www.rubyist.net/~matz/?date=20030514#p02

 Mix this with [ruby-talk:53186], and you have

svg% cat b.rb
#!./ruby
module M
   def initialize:hook(a)
      p "M::hook #{a.inspect}"
      super
   end
end

class A
   include M
   def initialize(a)
      p "A : #{a}"
   end
end

module N
   def initialize:hook(a)
      p "N::hook #{a}"
      super 12
   end
end

class B < A
   class << self
      def allocate:hook
         p "allocate:hook"
         super
      end
   end
   include N
   def initialize(a)
      @a = a
      p "B#initialize"
      super
   end
end

puts "======================="
p B.new(24)
puts "======================="
p A.new(36)

class B
   class << self
      undef allocate:hook
   end
   undef initialize:hook
end

puts "======================="
p B.new(24)
puts "======================="
p A.new(36)
svg%

 
svg% b.rb
=======================
"allocate:hook"
"N::hook 24"
"M::hook 12"
"B#initialize"
"A : 12"
./b.rb:39: warning: invalid inspect_tbl value
#<B:0x40098d2c @a=12>
=======================
"M::hook 36"
"A : 36"
#<A:0x40098bd8>
=======================
"B#initialize"
"A : 24"
#<B:0x40098ad4 @a=24>
=======================
"M::hook 36"
"A : 36"
#<A:0x40098a20>
svg% 

 I still don't like it


Guy Decoux