Hi all,
Definitions:
#lang racket
(require racket/sandbox lang/imageeq)
(define ev
(make-evaluator '(special beginner)
#:requires '(2htdp/image)))
Interactions:
> (image? (ev '(rectangle 2 2 'solid 'blue)))
#f
> (image=? (ev '(rectangle 2 2 'solid 'blue))
> (ev '(rectangle 2 2 'solid 'blue)))
> image=?: expects type <image> as 1st argument, given: (object:image% ... )
> ... [etc., redacted]
But the REPL renders (ev '(rectangle 2 2 'solid 'blue))) as a picture of a
tiny rectangle, as I would expect.
How is the above exposing the difference between image=?'s perception of an
image, and the object implementing the image?
And, more importantly, is there a way to make (meaningful) image
comparisons across the boundary imposed by the sandbox?
Thanks,
jmj
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