Did you forget what I explained at PLT day? You don't seem to be asking questions in terms of those things, so I'm not sure whether what I say is getting thru at all.
Robby On Sat, Aug 28, 2010 at 8:47 PM, Shriram Krishnamurthi <s...@cs.brown.edu> wrote: > ... which was my original question. But thanks. > > On Sat, Aug 28, 2010 at 9:36 PM, Robby Findler > <ro...@eecs.northwestern.edu> wrote: >> I guess you don't have the print handler set up right. >> >> On Sat, Aug 28, 2010 at 8:23 PM, Shriram Krishnamurthi <s...@cs.brown.edu> >> wrote: >>> The value I was returning is whatever kind of object is returned when >>> you embed an image in the Definitions window. That is, this was a >>> pasted, atomic image, not one created by a computation. I guess >>> they're not treated the same, but I'm surprised that ASL processing >>> the Definitions window didn't do the right conversion... >>> >>> On Thu, Aug 26, 2010 at 8:25 PM, Robby Findler >>> <ro...@eecs.northwestern.edu> wrote: >>>> At the moment there is a barn-door sized security hole in DrRacket, >>>> whereby it will take any snip% instance from the user's program and >>>> just display it in the repl. You can exploit this for Good by making >>>> the current-print of your language turn some values into snips (like >>>> images and things). 2htdp/image already does this, so that should just >>>> work if you return those. Its hard to tell what value Shriram's >>>> program was returning tho. But if it is a bitmap% object, he just has >>>> to do >>>> >>>> (make-object image-snip% ...the-bitmap-goes-here...) >>>> >>>> We will close this hole at some point, when we have a reasonable way >>>> to allow people to add new kinds of values without the security >>>> breach. >>>> >>>> Robby >>>> >>>> On Thu, Aug 26, 2010 at 6:17 PM, Jay McCarthy <jay.mccar...@gmail.com> >>>> wrote: >>>>> From what I can tell, it comes from ensuring that DrRacket shares the >>>>> htdp/image (or whatever) namespace with the running program so the >>>>> structs are the same and DrRacket's default renderer is detecting it. >>>>> I'm not sure how to replicate it though. (I tried for a bit so I could >>>>> make #lang frtime work.) >>>>> >>>>> Jay >>>>> >>>>> On Thu, Aug 26, 2010 at 11:55 AM, Shriram Krishnamurthi >>>>> <s...@cs.brown.edu> wrote: >>>>>> What is the #lang magic that makes >>>>>> >>>>>>> (get-image-from-web "http://racket-lang.org/logo.png";) >>>>>> (instantiate (class ...) ...) >>>>>> >>>>>> show the image rather than just its constructor? >>>>>> >>>>>> Shriram >>>>>> _________________________________________________ >>>>>> For list-related administrative tasks: >>>>>> http://lists.racket-lang.org/listinfo/dev >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> Jay McCarthy <j...@cs.byu.edu> >>>>> Assistant Professor / Brigham Young University >>>>> http://teammccarthy.org/jay >>>>> >>>>> "The glory of God is Intelligence" - D&C 93 >>>>> _________________________________________________ >>>>> For list-related administrative tasks: >>>>> http://lists.racket-lang.org/listinfo/dev >>>> >>> >> _________________________________________________ >> For list-related administrative tasks: >> http://lists.racket-lang.org/listinfo/dev > _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
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