On 9/2/23 11:35 AM, Per Bothner wrote:
On 9/1/23 23:08, John Cowan wrote:
In CL the function row-major-aref accepts an array and a single index
*n* and returns the *n*th element of the array in row-major order.
There is a corresponding function (setf row-major-aref) serving as the
corresponding mutator. This is equivalent to:
(define (row-major-aref array n)
(vector-ref (array->vector array) n))
but does not reify the results of `array->vector`. Is there some way
to do this with SRFI 231?
In srfi-164 array->vector returns a view, not a copy.
So your define works, and the same approach works for setting.
It is unfortunate that array->vector is incompatible between srfi-231
and srfi-164.
I think, e.g., Gambit would need to redefine vector-ref and vector-set!
to be more like Kawa's vector-ref and vector-set! for array->vector to
be allowed to return a view instead of a newly allocated vector.
Brad
