From: Jens Wille <jens.wille@...>
Date: 2008-09-30T12:22:44+09:00
Subject: Re: Way to intercept method calls? - Reopened

hi brian!

this is what i have come up with so far:

<http://github.com/blackwinter/scratch/tree/master/interceptable.rb>

unfortunately, it doesn't work as intended yet ;-) the open issues
being:

1) there doesn't seem to be a way to cancel the original method
invocation from Kernel#set_trace_func

<http://github.com/blackwinter/scratch/tree/6c8159a/interceptable.rb#L80>

2) local variables in the method body are indistinguishable from
method arguments when using Kernel#local_variables

<http://github.com/blackwinter/scratch/tree/6c8159a/interceptable.rb#L73>

3) [MINOR] maybe it should also apply down the inheritance chain
(replace 'klass.equal?(base)' with 'klass <= base')?

<http://github.com/blackwinter/scratch/tree/6c8159a/interceptable.rb#L69>

does anybody have an idea as to how to address these issues (1 + 2)?
or is this approach (Kernel#set_trace_func) rather silly and hopeless?

cheers
jens