From: transfire@...
Date: 2006-05-28T08:12:49+09:00
Subject: Annotated Exception (a la Ruby Treasures)

Anyone remember Ruby Treasures? Well I was browsing thru some old Ruby
Treasures code (written by Paul Brannan BTW) and I came across a couple
implementations for adding annotations to Exceptions. These worked by
wrapping special blocks around a raise call. The syntax of those
implemenations didn't come off well though, but I started wondering if
something like that would be useful if it were part of the 'begin' call
instead. Eg.

  def foo
    begin 'playing with Ruby'
      # . . .
      begin 'doing some silly things'
        # . . .
        raise RuntimeError
      end
    end
  end

Resulting in somthing like:

  => test.rb:7 RuntimeError: RuntimeError
            began -- doing some silly things
            began -- playing with Ruby
            from test.rb:2:in `foo'
            from test.rb:2

Just a thought,

T.