From: Daniel Berger <Daniel.Berger@...>
Date: 2005-10-07T05:36:20+09:00
Subject: Customizing Exception, but only when an error is raised

Hi all,

Say I do something like this do the Exception class:

class Exception
    alias :old_init :initialize
    def initialize(*args)
       old_init(*args)
       do_stuff
    end

    def do_stuff
       puts "Hello World!"
    end
end

And, I want +do_stuff+ to fire off if an error is *raised* but not if it is 
caught (and not re-raised).  In other words, I would expect +do_stuff+ to fire 
off in this example:

begin
    0/0
rescue ZeroDivisionError
    raise
end

But I don't want to fire off in this example:

begin
    0/0
rescue ZeroDivisionError
    # Do nothing
end

Is there a way I can accomplish this?

Thanks,

Dan