From: "trans.  (T. Onoma)" <transami@...>
Date: 2004-10-02T01:08:38+09:00
Subject: define_method, proc with block ?

A little help here. I'm trying to dynamically create a method that passes 
through to another method but adds in a fixed argument. Unfortunately I can't 
pass a block via a proc. How does one handle this? I ended up having to 
create two methods for each wrapped method. Yuk. Here's the code snip:

  # NOTE: wrap_advice is the method/proc used to wrap meth
  # meth is defined in a subclass or singleton, c, to achieve wrapping

  # define the interceptor
  c.class_eval {
    define_method("advice___#{meth}",wrap_advice)
  }
  c.class_eval %Q{
    def #{meth}(*args,&blk)
      target = proc{super}  #proc{|*args,&blk| super(*args,&blk)}
      advice___#{meth}(target,*args,&blk)
    end
  }

Notice also I can't pass the block via the proc'd super either. I want to just 
do this:

  # define the interceptor
  c.class_eval {
    define_method(meth) {|*args,&blk|
      target = proc{|*args,&blk| super(*args,&blk)}
      wrap_advice.call(target,*args,&blk)
    end
  }

Any ideas?

Thanks,
T.