[GSLL-devel] gsd/grid: cannot convert #(...doubles...) to #m(...doubles...)

[Mirko Vukovic]

On Tue, Nov 16, 2010 at 3:56 PM, Liam Healy <lhealy at common-lisp.net> wrote:
> On Tue, Nov 16, 2010 at 2:23 PM, Mirko Vukovic <mirko.vukovic at gmail.com> wrote:
>> I can go from foreign arrays to cl-arrays:
>>
>> (grid:copy-to #m(1.0d0 2.0d0)  'grid::array)
>>
>> (although the use of the *internal* symbol `array' puzzles me)
>
> So, why did you use it?
> (copy-to #m(1.0d0 2.0d0) 'array)
> #(1.0d0 2.0d0)
> works just fine.

Hmm, now it works here too :-(

CL-USER> (grid:copy-to #m(1d0 2d0) 'array)
#(1.0d0 2.0d0)



>
>>
>> but I cannot do the converse:
>>
>> (grid:copy-to #(1.0d0 2.0d0) 'grid:foreign-array)
>
> That's because #(1.0d0 2.0d0) makes a vector without a specific
> element type, which foreign-arrays require
> (type-of #(1.0d0 2.0d0))
> (SIMPLE-VECTOR 2)
>
> (type-of (make-array 2 :element-type 'double-float :initial-contents
> '(1.0d0 2.0d0)))
> (SIMPLE-ARRAY DOUBLE-FLOAT (2))
>
> (copy-to (make-array 2 :element-type 'double-float :initial-contents
> '(1.0d0 2.0d0)) 'grid:foreign-array)
> #m(1.0d0 2.0d0)
>

Thanks,

Mirko