- Gambit-list - mailman.iro.umontreal.ca

instrumenting gambit
by lowly coder 14 Fév '09

14 Fév '09

is there anyway i can instrument the gambit interpreter? in particular, i'd like to have some function foo be called whenever: the interpreter tries to loads a *.scm file (like via include) thanks!

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Current reference to old use of MacGambit
by Bradley Lucier 13 Fév '09

13 Fév '09

He doesn't give the programs he wrote, and doesn't say whether his "new version of Scheme" is Gambit, but the entire post is interesting. Brad http://bit-player.org/2009/long-division

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Help system
by Marc Feeley 13 Fév '09

13 Fév '09

With release v4.4.1 there are a few features which allow documentation to be accessed easily. The "help" procedure is documented on the Gambit wiki here: http://dynamo.iro.umontreal.ca/~gambit/wiki/index.php/Documentation:Procedu… For example, the call (help table->list) will start a browser (the text-only lynx browser by default) which views the section of the Gambit manual documenting the table->list procedure. There is also a REPL comma command for accessing the documentation. The long form ,(h NAME) will view the procedure or special form NAME. The short form ,h will view the procedure which raised the exception which started the REPL. The Gambit wiki now contains the documentation for all the Gambit public procedures and special forms. It is currently a copy of the documentation in the Gambit manual. Of course the advantage of the wiki documentation is that it is editable. I'm hoping that people will contribute to the documentation by adding comments, corrections, examples, and information of interest to other users. The plan is to integrate these contributions back to the Gambit manual on a regular basis. Note that the Gambit manual uses the "texinfo" markup language, and for consistency this is also the markup language that the wiki documentation pages use (I wrote a texinfo to HTML plugin for the wiki which handles <texinfo> ... </texinfo> tags). For the integration to go smoothly the user contributions on the wiki should also be in texinfo format. The Gambit manual in HTML format and the wiki documentation are cross linked. If you click on the procedure or special form name in the HTML Gambit manual you will go to the page on the wiki documenting that procedure or special form. If you click on the name on the wiki you will go to the page in the HTML manual. This is useful when you want to read contextual documentation (like chapter introductions, related procedures, the table of contents, etc). Marc

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[ANN] Gambit-C v4.4.1 released
by gambit＠iro.umontreal.ca 13 Fév '09

13 Fév '09

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Serialization of continuations
by Jeremie Lasalle Ratelle 13 Fév '09

13 Fév '09

I am trying to serialize continuations with the following code http://pastebin.com/m32acd9c2 It works correctly in gsi but when I compile with gsc I get this error : can't serialize #<return #4> Is it possible to serialize a continuation in compiled code?

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man _gambit func_
by lowly coder 12 Fév '09

12 Fév '09

so in emacs, I have c-h k, c-h f; for perl i have perl doc; for c, I have man pages in gambit scheme, when I want to lookup a quick descrition of what a function does, or look up it's source code, what's the most convenient way? currently I'm doing a mix of: grep "func_name" gambit-c.txt and cd ~/gambit-build-dir grep "func_name" . -R | grep "scm:" but i feel there should be a more elegant solution

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format & regex
by lowly coder 11 Fév '09

11 Fév '09

hey, so gambit is really awesome; especially the debugger; however I'm running into some trivial practical issues -- and curious how others are solving it 1) sed/awk/grep/perl if possible, i'd like to use gambit for these type of apps instead (being slower is fine; i just want everything in scheme for now) -- is there a good way to do regex matching in gambit? 2) fprintf/format pp and display are cool -- but sometimes, I really really want control over my output; how is this generally done in gambit? things like "print this number with 8 chars width, 3 digits after the decimal point" seems kind of hard to phrase thanks! keep up the good work

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Re: [gambit-list] man _gambit func_
by Marc Feeley 11 Fév '09

11 Fév '09

On 10-Feb-09, at 1:46 PM, vasil wrote: > REPL is not an IDE. They are very different by definition. REPL is > standing just for "read-eval-print-loop", IDE - "integrated > development > environment" You are reading into those acronyms way too much! Basically an IDE is a tool to help you develop and debug your program. It allows you to interact with the system to edit code, debug code, etc. The IDE helps you out with autocompletion, cross referencing, build automation, etc. Gambit's REPL is such an IDE. It is textual rather than graphical but it has the same purpose: help you develop and design programs. And the "I" of IDE is completely appropriate... the REPL is integrated to the environment so it is always there when you encounter a problem, allowing the user to debug programs at any time, even if the program was considered to be bug free (a feature I call "live debugging" or "open heart debugging"). It also allows you to debug programs that run on environments, such as embedded systems, that don't have a screen or enough memory to run a full-featured IDE. Gambit's REPL is more sophisticated than you might think. It is not simply as you suggest: (define (repl) (pp (eval (read)) (repl)) There is a lot of logic to give access to the environment, backtrace, threads, error messages, etc. Moreover Gambit's line editing has features that are more sophisticated than what is available in rlwrap. For example symbol completion, input highlighting, and emacs keybindings for s-expressions. Perhaps you can live without these things, but I can't. I use the REPL all the time from the shell. A full-featured IDE is too heavyweight for most of my needs (I don't want to have to wait a long time for the IDE to start, just do debug a simple script or experiment with a short piece of code). Marc

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output of define-syntax
by lowly coder 10 Fév '09

10 Fév '09

Session: --- ~/dynamic$ cat t2.scm (define-macro (assert-equal lhs rhs) (let ((g-lhs (gensym)) (g-rhs (gensym)) (e-lhs (gensym)) (e-rhs (gensym))) `(let ((,g-lhs ,lhs) (,g-rhs ,rhs) (,e-lhs ',lhs) (,e-rhs ',rhs)) (if (not (equal? ,g-lhs ,g-rhs)) (pp `(,,e-lhs = ,,g-lhs <> ,,g-rhs = ,,e-rhs)))))) (pp (lambda () (assert-equal (+ 1 2) (- 3 4))) (current-output-port)) ~/dynamic$ gsi t2.scm (lambda () (let ((#:g0 (+ 1 2)) (#:g1 (- 3 4)) (#:g2 '(+ 1 2)) (#:g3 '(- 3 4))) (if (not (equal? #:g0 #:g1)) (pp `(,#:g2 ,@`(,'= ,@`(,#:g0 ,@`(,'<> ,@`(,#:g1 ,@`(,'= ,@`(,#:g3 ,@'()))))))))))) ~/dynamic$ Question: --- Why do I have: (pp `(,#:g2 ,@`(,'= ,@`(,#:g0 ,@`(,'<> ,@`(,#:g1 ,@`(,'= ,@`(,#:g3 ,@'()))))))))))) ? It seems prettier as: `(,#:g2 '= ,#:g0 '<> ...) the ,@` seems extraneous

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largest projects
by lowly coder 09 Fév '09

09 Fév '09

what are the largest projects in: * gambit scheme (termite / jazz?) * scheme * scheme or lisp (emacs?) i'm interested in seeing if there's a way to visualize large scheme source code bases efficiently thanks!

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