Gambit-list Février 2010

gambit-list@iro.umontreal.ca

21 participants
18 discussions

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Google AI Challenge
by Bradley Lucier 05 Fév '10

05 Fév '10

Looks interesting, and there will be a scheme "Starter Package" soon. Brad http://csclub.uwaterloo.ca/contest/

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Re: [gambit-list] Macros in Black Hole
by Marc Feeley 05 Fév '10

05 Fév '10

On 2010-02-05, at 8:48 AM, Álvaro Castro-Castilla wrote: > > > El 5 de febrero de 2010 14:28, Marc Feeley <feeley(a)iro.umontreal.ca> escribió: > > On 2010-02-05, at 8:17 AM, Álvaro Castro-Castilla wrote: > > > A) If I use import, it says that c-lambda is not available in interpreted mode. But then I'm trying with compile-modules! > > However, it tries to write to /usr/lib/modules/ns.dat, and I don't have the permission. Using this compiler option: > > > > bsc -:~~DIR=/data/projects/scheme -i > > I'm just guessing, but you probably meant: > > bsc -:~~=/data/projects/scheme -i > > The "DIR" part is a meta variable in the documentation, to be replaced by "lib", "bin", etc or be empty when the central installation directory is meant (i.e. the meaning of a path like "~~/..."). > > Also, in your Scheme files (and maybe blackhole) there seems to be references to the library directory with a path like this: > > ~~/lib > > Note that it is better to use > > ~~lib > > so that proper redirection will occur (if the system is started with -:~~lib=/foo/bar). > > Marc > > > > Ah, I tried that, but then it doesn't find gambit#.scm, and with ~~bin it gives a weirder error: > > *** ERROR IN #<procedure #2>, "/usr/lib64/modules/module.scm"@1038.23 -- No such file or directory > (open-process > '(path: "/data/projects/scheme/gambc-cc.bat" arguments: ("dyn") directory: "/data/projects/scheme/" environment: ("GAMBC... > ) > > I tried doing this as root and it works. > I guess that if I don't have access to default ~~lib, then I need to copy all the gambit library distributed files to the place where ns.dat could be written? As root you could change the write permission of /usr/lib/modules to allow you or the group you are in to write. This of course has obvious security issues. Perhaps blackhole should distinguish between modules that are available system-wide and those that are user specific. Alternatively, compile the Gambit system from scratch and install it in your home directory. Something like this: ./configure --prefix=/home/foobar/gambit --enable-single-host make make install Then ~~lib will be /home/foobar/gambit/lib and you will have write access to it. Marc

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Macros in Black Hole
by Álvaro Castro-Castilla 05 Fév '10

05 Fév '10

Hi! I'm new to this list and also to Gambit. I'm trying to get used to it, and I like most of the things very much (taking into account that I'm new to Scheme). I'm trying to use Black Hole module system, and I've found out something that I don't understand how it works or what I'm doing wrong. If you have this scheme file, called for example "bhtest.scm" (load "/usr/lib/modules/build") (import (std srfi/14)) and you try to execute it with "gsc -i bhtest.scm", you'll get this: *** ERROR IN "blackhole.scm"@3.2 -- Unbound variable: import However, if you run "gsc", and write those 2 lines, everything will work as expected. Then I figured out that with the option "-:s" it seems to understand the "import" macro, so the error turns into: (load "/usr/lib/modules/build") (import test-module) *** ERROR IN #<procedure #2>, "/usr/lib/syntax-case.scm"@7821.33 -- unknown module test-module (there is a test-module.scm file, of course, and this works again in interactive mode) anyway, I don't really know what sense it makes to load the gambit syntax-case.scm when Black Hole is supposed to provide another one. So, the point is: everything works in interactive mode as expected, but I can't run the same code from a file. I would appreciate some help and/or clarifications, please. Thank you, Álvaro Castro-Castilla

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Re: [gambit-list] newbie question: Little scheme
by Seth Burleigh 05 Fév '10

05 Fév '10

Assuming you know nothing about emacs. Just as an example, heres my .emacs file. You should create a directory , say C:/emacs/plugins/, under which you have the following files: gambit.el (contained with gambit download) paredit.el (http://mumble.net/~campbell/emacs/paredit.el) /icicles/ (just download from http://www.emacswiki.org/emacs/Icicles_-_Libraries and get zips or other direction) Then go into .emacs file and edit the path to whatever you want (in this case C:/emacs/plugins/) Start emacs. Hit Control-x Control-f and type in ~/.emacs Copy and paste file contents into it, save , and restart. You should be good! If not, read the error message, change the contents, and now you Can hit f1 to reevaluate .emacs file buffer. Now hit f5 and hopefully scheme will start if gsc.exe (or whatever) is in your environmental path. Just browse the .emacs file and customize everything to whatever you want. I would suggest: (1)Reading the tutorial which is advertised when emacs shows up. (2)Print out the paredit cheatsheet. (3)Figuring out keyboard shortcuts for scheme mode. (4) Figure out shortcuts for REPL (like C-p, C-n) (5)Reading about icicles. For example, when you hit M-x (alt-x) you could then type something in and hit shift tab and all the possibilities will show up. (6) Figure out how to debug gambit in the repl. Trust me , you'll thank yourself later. Oh, and the custom-set-variables and the custom-set-faces on top? If you already have some in your .emacs file, don't delete them. In fact, you can delete this if you don't want cua-mode, which adds windows copy and paste key rebinding to emacs.

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TFP 2010 - Call for Papers and Participation
by TFP 2010 03 Fév '10

03 Fév '10

TFP 2010: 11th SYMPOSIUM ON TRENDS IN FUNCTIONAL PROGRAMMING May 17-19, 2010 University of Oklahoma http://www.cs.ou.edu/tfp2010/ TFP 2010 is an international forum for researchers with interests in any aspect of functional programming. SUBMISSION and REGISTRATION DEADLINES April 2: Submission deadline April 16: Early registration deadline ($350, $200 for students) May 7: Late registration deadline ($425) May 17-19: TFP Symposium POST-SYMPOSIUM PROCEEDINGS Springer series: Lecture Notes in Computer Science Details about the event schedule, symposium scope, submissions, and registration may be found on the symposium website. http://www.cs.ou.edu/tfp2010/ (Web browser key "tfp 2010") Submitted papers and extended abstracts are reviewed for presentation at the symposium, and a formal refereeing process after the symposium selects the best presentations for publication the Springer series, Lecture Notes in Computer Science. We invite you to participate in TFP 2010. - Rex Page, University of Oklahoma, Program Chair - Viktia Zs and Zolt Horvath, Ev Lord University, Symposium Co-Chairs Sponsors: Erlang Solutions Ltd and The University of Oklahoma

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Termite Exceptions
by David N Murray 02 Fév '10

02 Fév '10

I got the latest termite via the svn command. Gambit-C 4.6.0: On my BSD machine: $ tsi > (define (t1) (spawn (lambda () (raise 'drawbridge)))) > (t1) #<thread #2 anonymous> > [error] Wed Jan 27 14:47:45 EST 2010 #<thread #2 anonymous> *** ERROR IN ##dynamic-env-bind -- This object was raised: drawbridge On Windows Vista, using the VC version (I created a tsi.bat based on the tsi shell script): > (define (t1) (spawn (lambda () (raise 'drawbridge)))) > (t1) #<thread #2 anonymous> > (no error or exception is reported) The same thing happens on Vista with the MinGW Gambit-C build. The exception is not propogated. All tsi scripts invoke 'gsi -:dar' and the necessary termite include and load commands. I have other termite tests that run fine on the Vista install. It's just that process exceptions are silently eaten. Exceptions are reported in Vista, just not from termite processes: > (define (t1) (raise 'drawbridge)) > (t1) *** ERROR IN (console)(a)11.1 -- This object was raised: drawbridge 1> Thoughts? TIA, Dave

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Inlining managed visual c++ code in gambit
by Seth Burleigh 31 Jan '10

31 Jan '10

Recently , I have wanted to embed c++ code in gambit just like you can do with c code. Not having any success building the windows GNU version by passing -enable-cplusplus to ./configure, I switched to linux, built gambit, and discovered that I could easily embed c++ code in c-declare forms. (c-declare "using namespace std; public class Test : ....") Then I could use c++ methods from c-lambda forms, etc. Now im switching back to windows. Since I have had no luck building gambit-c in windows when attempting to enable cplusplus, I have switched to attempting the same with visual c++. However I see no equivalent option in the visual c++ express .bat build file. The compiler assumes that all of my files are c files, because they end with .c, so it signals an error when I attempt to compile code like (c-declare "using namespace std; public class test: ...") Has anyone had any success in embedding visual c++ code into their gambit-c apps?

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How to edit Scheme code the easiest etc. way Re: newbie
by Mikael 31 Jan '10

31 Jan '10

In addition to Emacs: - There's the SchemeWay plugin (http://sourceforge.net/projects/schemeway/) for Eclipse (http://www.eclipse.org/), using which you can edit Scheme code. It highlights the other parenthesis, does automatic code formatting using the Tab key, and has syntax highlighting. - A real basic alternative for minor hacking could be Vim (www.vim.org) - it highlights the other parenthesis, and has syntax highlighting. - Jazz Scheme has an editor Mikael

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Gambit-list Février 2010