From: Yukihiro Matsumoto <matz@...>
Date: 2004-10-20T15:06:35+09:00
Subject: trace_func parameters (Re: ruby-dev summary 24298-24353)

Hi,

In message "Re: ruby-dev summary 24298-24353"
    on Wed, 20 Oct 2004 11:11:42 +0900, "trans.  (T. Onoma)" <transami@runbox.com> writes:

|I don't understand why it doesn't return the class of the outer scope --and 
|it's binding too. In this case it would be TOPLEVEL_BINDING and class Object, 
|I believe.

trace_func receives 6 parameters:

  event:	type of event which calls trace_func
  file:         file name of the place of event
  line:         line number of the place of event
  method:       name of the method surrounding the place of event
  binding:      binding at the place of event (if any)
  klass:        class that defines calling method (for call event),
                or false value if event happened outside of any method

This in the current behavior, "method" and "klass" parameters are left
blank for the "end" event, caused by class/module statement outside of
methods.  Do you want to change these?  For any reason?

The "binding" parameter is bit more complicated.  The "end" events are
caused just in the middle of scope transitions (class scope to outer
scope), so that I had hard time to determine which binding to return.
Besides that, all know usage of "end" event do not require any
information other than the event position, I haven't been motivated
much to change the behavior, making interpreter more complex.

							matz.