'Is there a way to get back special forms after redefining them?
Scheme and Racket do not protect special forms, so it's possible to redefine them. Just purely out of curiosity, is there a way to get back special forms after they have been overwritten?
Example situation:
$ racket
Welcome to Racket v6.11.
> (define define 1)
> (+ define define)
2
> (define x 3) ; How to get the original 'define' back?
; x: undefined;
; cannot reference undefined identifier
; [,bt for context]
>
If I redefine a special form, is there a way to get back the special form?
Sources
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