From: Sean O'Dell <sean@...>
Date: 2002-04-17T10:04:22+09:00
Subject: Redefining module methods

In two Ruby script files I have two methods of the same name within a single
module namespace.  When the second file is "require'd", I would like to be
able to save a pointer to the existing method, then allow the second method
of the same name to override, such that both the overriding method can be
called (normally) and the overridden method can be called via its pointer.

Here's a snippet of code I can't get to work properly, but which I'm sure is
close to what I want to do:

def Module::testmethod()
  print("test 1\n")
end

methodptr = method(:testmethod)
undef_method(:testmethod)

def Module::testmethod()
  print("test 2\n")
end

testmethod()
methodptr.call()


....which I thought would call both methods one at a time.  However, when I
fiddle around with this code, generally speaking, either I get error
messages saying undef_method is private or a warning that Module::testmethod
is being overriden.  I want to avoid the warning as well; whatever it takes
to make Ruby happy with what I'm trying to do.

Where am I messing this up?

    Sean