On 4/28/20 4:31 PM, John Cowan wrote:
> What convinced you that a standard wrapper around mutable arrays that
> made them general arrays without a writer method was insufficient.

(array-assign! destination source)

can do a block copy using memmove from source to destination if the
arguments are specialized arrays, they have the same storage class, and
the elements to be moved are in order and adjacent, even if source is
immutable.

That's not true if source is an immutable array wrapper around a
specialized array.

Brad