BREAK* completeness

[Artyom Bologov]

• Current frame/function fetching:
  • ECL
  • ABCL
  • Allegro
  • CLASP
  • Lispworks
  • Corman
  • CMUCL, SCL
  • MKCL
• Arglist listing?
• 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.