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Re: CHANGE-CLASS not implemented?
- To: email@example.com
- Subject: Re: CHANGE-CLASS not implemented?
- From: haible (Bruno Haible)
- Date: Mon, 20 Sep 93 16:27:24 +0200
Sy Ali <syali@cs.Buffalo.EDU> asks:
> Is this not implemented in the latest version of CLISP?
No, I didn't implement CHANGE-CLASS. It is hardly ever used, and it violates
a fundamental property of Lisp: an object's type must be constant as time
(Would you be happy if a string could be "changed" to become a number?)
If you really need CHANGE-CLASS, you may use PCL. It's bigger and slower
than CLISP's native CLOS, but it has CHANGE-CLASS.