From: Andrew Hunt <andy@...>
Date: 2000-03-31T11:33:49-05:00
Subject: [ruby-talk:02301] Re: DBC

	>> My Rube-Goldberg attempt used tracefunc to hook into the dispatcher,
	>> so that I could check every method call and see if a pre/post condition
	>> existed and then call it.  This also gave me the opportunity to call
	>> invariant on exit from every method call.
	>> 
	>> /\ndy
	>> 
	>
	>I was LOOKING for a mechanism like that!
	>
	>How did you know it existed? From digging in the code
	>or what?

As with most things, we found it from digging :-)

Have a look at tracer.rb and debug.rb as well as
set_trace_func in eval.c

I had to modify the Binding object to throw in some extra
state; but I'm not convinced that was necessary.

/\ndy