From: ts <decoux@...>
Date: 2003-06-11T19:42:02+09:00
Subject: Re: Stack Frames, Functions and Variables.

>>>>> "R" == Robert Klemme <bob.news@gmx.net> writes:

R> The Wiki link is
R> http://www.rubygarden.org/ruby?MethodHooks

 Well, your code has a problem with this, no ?

svg% cat b.rb
#!/usr/bin/ruby
require 'hooks.rb'

module A
   define_hook(:length) do
      puts "A#length"
      prior
   end
end

class String
   include A
   define_hook(:length) do
      puts "I'm calculating the length"
      prior
   end
end

str = "abcde"

x = str.length
puts x
svg% 

svg% b.rb
./hooks.rb:65: warning: instance_methods parameter will default to 'true' in Jan 2004
./hooks.rb:58:in `class_eval': (eval):1:in `class_eval': undefined method `length' for module `A' (NameError)
        from ./hooks.rb:58:in `class_eval'
        from ./hooks.rb:58:in `define_hook'
        from ./b.rb:5
svg% 


Guy Decoux