From: Paul Brannan <pbrannan@...>
Date: 2004-10-07T02:41:26+09:00
Subject: Re: what is super?

On Thu, Oct 07, 2004 at 01:02:51AM +0900, trans.  (T. Onoma) wrote:
> I ask b/c I was wondering if getting the binding of super is any way feasible.

"super" is a method call that calls into the base class.

What you want isn't to get the "binding of super" (which is really
meaningless), but the binding for the block that is created when you
call a method.  There isn't any good way to do this, but you can hack it
with set_trace_func:

  require 'thread'

  def call_and_get_binding(obj, method, *args, &block)
    critical = Thread.critical
    Thread.critical = true
    begin
      binding = nil
      set_trace_func proc { |*x|
        if x[0] == "call" then
          set_trace_func nil
          binding = x[4]
        end
      }
      result = obj.__send__(method, *args, &block)
      return binding, result
    ensure
      Thread.critical = critical
    end
  end

  def foo
    x = 1
  end

  binding, result = call_and_get_binding(self, :foo)
  p eval("x", binding) #=> 1

Now why you'd want to do this is beyond me, but have fun...

Paul