You might have to unpack that a little bit more for me, as I don't see how that's the case. Additionally, why would it work from Terminal and not DrRacket?
-- Dave (on the iPhone) On Aug 29, 2011, at 6:32 PM, Robby Findler <ro...@eecs.northwestern.edu> wrote: > I think what's happening is that you're creating a place whose first > action is to create that same place again (over and over). > > Robby > > On Mon, Aug 29, 2011 at 8:17 PM, David Mitchell > <d...@fallingcanbedeadly.com> wrote: >> I've been trying to experiment with racket/place, but it seems to have >> significant incompatibilities with DrRacket. I've defined a module based on >> a code snippet in http://www.cs.utah.edu/plt/publications/dls11-tsffd.pdf >> that looks like this: >> >> #lang racket >> (provide all-defined-out) >> (define (fib n) >> (define (fib-inner n-remaining i i+1) >> (if (= n-remaining 1) >> i+1 >> (fib-inner (- n-remaining 1) i+1 (+ i i+1)))) >> (if (<= n 0) >> 0 >> (fib-inner n 0 1))) >> (define (start-fib n) >> (define p >> (place ch >> (define n (place-channel-get ch)) >> (place-channel-put ch (fib n)))) >> (place-channel-put p n) >> p) >> (define (super-simple) >> (define p >> (place ch >> (place-channel-put ch 5))) >> (place-channel-get p)) >> >> If I run racket in my Terminal and load this module, I'm able to use >> start-fib and super-simple as expected. However, if I define this module in >> the DrRacket editor and access the functions through the repl, attempts to >> receive data from either place appear to hang. I'm running OS X Lion, and >> I've tried both the 64-bit and 32-bit versions of 5.1.3, as well as the >> 64-bit version of the latest nightly build (5.1.3.6--2011-08-28(46a0fe9/a)). >> I posted a question about this to the IRC channel last night, and one other >> user (jonrafkind) indicated that that the issue could be reproduced on >> 32-bit Linux, so it seems unlikely to be a platform issue. This user also >> indicated, "it seems places keeps reloading the current module." >> (Unfortunately, I am quite new to racket, so I have only a vague idea what >> this means, and no idea at all as to how one would go about discovering such >> a thing) >> Does anyone have any insight as to why this might be failing and/or how I >> might work around it (without abandoning the GUI)? >> _________________________________________________ >> For list-related administrative tasks: >> http://lists.racket-lang.org/listinfo/users >> _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
