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Re: Vectors and Arrays

Yes, we want fill-pointers in non-growable strings.  I think I said this
in my message anyway.  Actually it only takes about 15 seconds to figure
out how to have two kinds of vectors, one with fill pointers and one
without, while still being able to open-code VREF, VSET, and
VECTOR-ACTIVE-LENGTH in one instruction (VECTOR-LENGTH, on the other hand,
would have to check which kind of vector it was given).  So the extra
storage is not an issue in any case.