[cmucl-imp] Re: Redefining structure accessors (summary)

[Raymond Toy]

On 3/16/10 6:06 PM, Helmut Eller wrote:
> * Raymond Toy [2010-03-16 21:48+0100] writes:
>
>   
>> Actually, there's one other alternative.   When the accessor is
>> redefined, we can silently (or noisily) replace the dsd-accessor
>> function with nil.  Then we don't get the strange behavior of our
>> redefined function being used to access the slot.   This also means we
>> can't actually access the slot ourselves either because we'll try to get
>> the fdefinition of nil.  But the structure and everything else remains
>> defined.
>>
>> (I have not tried that out yet.)
>>     
> If it works, good.
>   
Seems to work.  But perhaps this is overly complex.  Maybe we should
just give up.  We can signal a continuable error and if the user really
wants to redefine the accessor, let him.  It's up to him to make sure
it's still usable as an accessor.  If not, that's his problem; we warned
him. :-)

Ray