BREAK* completeness

[aartaka]

• [ ] Current frame/function fetching:
  • [X] ECL
  • [X] ABCL
  • [ ] Allegro
  • [ ] CLASP
  • [ ] Lispworks
  • [ ] Corman
  • [ ] CMUCL, SCL
  • [ ] MKCL
• [ ] Arglist listing?
• [x] Indentation? Prettier variable listing?
• [ ] Customizable formatter.
• [ ] Maybe introduce a with-break* macro? Potential behavior:

(with-break*
  (+ 1 2 most-positive-fixnum))
;; (progn
;;   (break* "Before evaluating ~s" '(+ 1 2 most-positive-fixnum))
;;   (let ((args (list 1 2 most-positive-fixnum)))
;;     (break* 'args "After argument evaluation")
;;     (let ((result (apply '+ args)))
;;       (break 'result "After form evaluation")
;;       result)))

At this point, trace* is likely a better fit.