[Sbcl-devel] [PATCH] Printing arrays with :element-type with *print-readably*

[Bill R. <air...@gm...>]

Hi.

I'd like to re-submit this patch and ask for some advice, if it is 
unacceptable.

It basically fixes this:

(with-standard-io-syntax
  (format nil "~s" (make-array 2 :element-type 'single-float 
:initial-contents '(1.0 2.0))))

to output this:
#.(make-array 2 :element-type 'single-float :initial-contents '(1.0 2.0))

instead of generating an error condition or printing #(1.0 2.0) (ie. 
re-loaded without type
specialization.

One cannot provide a print-object method specialised on this kind of 
type-specialized array. So, I would really like to get this 
functionality into SBCL, if it is at all possible, to save having to 
work-around it untidily.

Thanks.
Bill