[Newbies] 'locking' an object
Randal L. Schwartz
merlyn at stonehenge.com
Thu Oct 2 18:25:21 UTC 2008
>>>>> "Bert" == Bert Freudenberg <bert at freudenbergs.de> writes:
Bert> There is no magic in #instVarAt:. It exists merely for helping
Bert> debugging.
I meant the primitive it invokes. Encapsulated magic is still magic.
>> So code would merely have to execute the equivalent of the primitives behind
>> #instVarAt: and #instVarAt:put:, and no amount of wrapper class would help.
Bert> All you need to do to prevent the debugger from accessing instance
Bert> variables is overwriting the methods the debugger invokes.
Ahh, but a determined outsider could still add methods to the class of the
object on the fly, hand-compiling them if necessary.
Unless you're now voting for an immutable method dictionary. :)
--
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
<merlyn at stonehenge.com> <URL:http://www.stonehenge.com/merlyn/>
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