From: "T. Onoma" <transami@...>
Date: 2003-11-22T10:22:03+09:00
Subject: Re: "stereotyping"

and i thought it was so radical when i wrote it yesterday

# notice if TypeErrors woud return offending respond_to? method
# in error message then it would continue to probe

class DuckHunter

  def initialize
    @a_r_g_s = {}
  end

  def a_r_g_s
    @a_r_g_s
  end

  def d_u_c_k_c_a_l_l
    begin
      yield
    rescue TypeError => e
      self.send(e.message)
      retry
    end
  end

  def method_missing(aSym, *args)
    # This will happen the first time
    aSymStr = aSym.to_s
    @a_r_g_s["#{aSymStr}"] = [ args.collect { |a| "#{a.class}" } ]
    begin
      d = %Q{
        def self.#{aSymStr}(*args)
          # This will happen the subsequent time
          @a_r_g_s["#{aSymStr}"] } + %q{.concat [ args.collect { |a| 
"#{a.class}" } ]
          self
        end
      }
      instance_eval d
    rescue SyntaxError
      puts "TypeError induced SyntaxError! TypeError must return respond_to 
method!"
      raise
    end
    self
  end

end

# example

class TypeTest
  def ameth(x)
    big4 x
    #---
    puts x.to_i
    puts x.jump(4)
    puts x.do_what_ever("Duck can take it!", /\w+/)
    puts x.do_what_ever("Duck can take it!", /\w+/, 42)
  end
end

t = TypeTest.new

puts "\nDUCK QUACKS"

dh = DuckHunter.new
dh.d_u_c_k_c_a_l_l do
  t.ameth(dh)
end

# show args
puts "\nameth:"
dh.a_r_g_s.each { |name, argpat| argpat.each { |args| puts "\t#{name}
(#{args.join(',')})" } }

# -----------

On Saturday 22 November 2003 12:52 am, Greg McIntyre wrote:
> "David Naseby" <david.naseby@eonesolutions.com.au> wrote:
> > Below is a quick hack to do that. Needs work. Needs redirection of IO.
> > But its kinda cute.. Has issues with side effects, of course, and
> > printing crapola all over the place.
>
> Is this or something like it on the RAA? Perhaps a slightly more general
> mechanism to proxy messages to the "real" object and call a
> hook/callback?

late could be added