From: Jake McArthur <jake.mcarthur@...>
Date: 2006-05-15T14:39:36+09:00
Subject: Variable Assignment Callback(s)?

I need a callback for variable assignment; instance variable  
assignment is the most important, but others would be an even greater  
plus. I was searching for a solution and stumbled across this,  
apparently from some past Ruby Talk thread from before my time here.  
I was wondering if any of the potential variable assignment callbacks  
besides global scope have been fulfilled? Anybody know?


   POTENTIAL                        ACTUAL

   Class creation                   Class#inherited, AClass#new
   Class reopening/closing
   Module creation
   Module reopening/closing
   Method definition                Module#method_added
   Method removal                   Module#method_removed
   Method undef                     Module#method_undefined
   Singleton-Method definition      Object#singleton_method_added
   Singleton-method deletion        Object#singelton_method_removed
   Singleton-method undef           Object#singelton_method_undefined
   Constant assignment*
   Global variable assignment       Kernel#trace_var**
   Class variable assignment
   Instance variable assignment
   Local variable assignment
   Module inclusion                 Module::included,  
Module#append_features
   Module extension                 Module::extended,  
Module#extend_object
   Missing Method                   Object#method_missing
   Missing Constant                 Module#const_missing
   Object Destruction               ObjectSpace#*_finalizer
   Program Termination              Kernel#at_exit

   * Constant assignment may encompass class and module creation (?)
   ** Actually a trace rather then a callback
   ++ set_trace_func is not included, it is a separate "universal"  
catch-all

- Jake McArthur