Honestly an overridden op could insert new rules in the code and recompile everything. If we have to always check for such nasty things, then we can forget all performance and optimizations.
That, at least, we don't have to worry about. None of the existing languages (well, Tcl might, but I don't care there) require going quite so mad, and if Larry tries, well... we have ways to deal with that. :)
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Dan
--------------------------------------"it's like this"------------------- Dan Sugalski even samurai [EMAIL PROTECTED] have teddy bears and even teddy bears get drunk