http://blog.gmane.org/gmane.lisp.scheme.scheme48 hourly 1 1901-01-01T00:00+00:00 http://gmane.org/img/gmane-25t.png http://gmane.org http://comments.gmane.org/gmane.lisp.scheme.scheme48/2581 <pre>Hi all, I'm having a problem with reinitializers. The macro DEFINE-REINITIALIZER defines a record variable, which might or might not be reachable from a resumer function. When it is not, the reinitialization routine doesn't make it into the saved heap image. Take this example: (cond ((fork) =&gt; wait-for-child-process) (else (exec "date")))) ; no values returned Writing good.image Writing bad.image Resuming good.image and calling DATE works as expected, but running the VM with bad.image hangs it because the reinitializer from the posix-process module that installs signal handlers doesn't run, causing the system to ignore SIGCHLD signals. Using ADD-INITIALIZTION-THUNK! instead of a reinitializer doesn't work because when the thunk runs posix.so would not yet have been loaded back in. It seems to me that we should be able to expect reinitializers to run. I'm not sure what the best solution here is. We could use a separate second-stage initialization thunk list to implement reinitializers, inst</pre> Will Noble 2013-04-29T14:10:14 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2580 <pre> Workshop for Commercial Users of Functional Programming 2013 Sponsored by SIGPLAN CUFP 2013 Co-located with ICFP 2013 Boston, MA, United States Sep 22-24 Talk Proposal Submission Deadline: 29 June 2013 The annual CUFP workshop is a place where people can see how others are using functional programming to solve real world problems; where practitioners meet and collaborate; where language designers and users can share ideas about the future of their favorite language; and where one can learn practical techniques and approaches for putting functional programming to work. Giving a CUFP Talk ================== If you have experience using functional languages in a practical setting, we invite you to submit a proposal to give a talk at the workshop. We are looking for both experience reports and in-depth technical talks. Experience reports are typically 25 minutes long (but negotiable), and aim to inform participants about how functional programming plays </pre> Michael Sperber 2013-03-10T13:25:20 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2578 <pre> R5RS specifies that map work with an arbitrary amount of lists, "(map proc list1 list2 ...)" however I get an error when I try to evaluate: (map + '(1 2 3) '(1 2 3)) assertion-violation: wrong number of arguments [tail-call] (#{procedure 8517 map} '(#{procedure 110 +} (1 2 3) (1 2 3))) </pre> Cinolt 2013-03-02T14:24:29 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2577 <pre>Testing mail server configuration. No action is required on your part. Best Jonathan </pre> Jonathan Rees 2013-02-25T21:20:22 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2570 <pre> Version 1.9 of the Scheme 48 system is now available from the Scheme 48 home page: http://www.s48.org/ Scheme 48 is a based on byte-code interpreter and comes with a module system, an extensive set of libraries, an interactive command-line-based development environment and a manual in various formats. Scheme 48 runs on most Unix/Linux systems, as well as Windows NT, 2000, XP, and Vista, and is fully R5RS-conformant. The 1.9 release has been a long time in the making, and is a substantial feature release, with help from many contributors. See the attached release notes for details. This release marks a change in direction (actually two changes) for Scheme 48: As most regular users of the system know, the system was originally developed by Richard Kelsey and Jonathan Rees. I have handled the releases of Scheme 48 since version 1.1, with the help of Martin Gasbichler, Marcus Crestani and many other volunteers. We have tried to make the system more oriented towards practical uses, and thus moved away fr</pre> Michael Sperber 2013-01-22T17:28:26 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2567 <pre> After something like 2.5 years of release engineering, I've put RCs for Scheme 48 1.9 at: http://s48.org/1.9/scheme48-1.9rc1.tgz http://s48.org/1.9/scheme48-1.9rc1.msi I'd appreciate if people could give this a whirl. I'm especially interested in reports Mac OS X Mountain Lion and Windows 8. There are many things to say about this release; I'll say (some of) them with the actual release announcement. I hope to push out the actual release by mid-January. Sorry for taking so long. NOTE: On my Mac OS X Lion installation, Xcode's C compilers come with a prerelease LLVM backend that has a bug which essentially breaks compiling the Scheme 48 VM. (The compile takes forever, and the resulting VM is unbearably slow.) This affects both the Clang and the gcc front ends. The only solution I know to this problem is to install LLVM/Clang via some other route. I use the Clang/LLVM binaries from the LLVM download page at: http://llvm.org/releases/download.html (Note that Clang generates many, many warnings, bu</pre> Michael Sperber 2012-12-30T16:40:32 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2565 <pre>There's a bug in ps-compiler/prescheme/flatten.scm If you try compiling this code, the prescheme compiler loops forever in FLATTEN-DEFINITIONS: (define-structure foo (export a b) (open prescheme) (begin (define (a) (set! b (lambda () 100))) (define b (lambda () -2)) )) The code to do the looping doesn't cdr down the list of definitions. None of the code in the s48 distribution features global variables of type closure that get assigned (or this bug would have already turned up). Also, for reasons I don't understand, if you change FLATTEN-DEFINITIONS so that the check (and (variable-set!? var) (closure? value)) always fails, which ensures ensures termination, the compiler nevertheless seems to put B into a variable and everything works anyway. That makes me think my test program could be better. If anyone can recommend a better test program, I'd appreciate it. Heath </pre> Heath Putnam 2012-12-23T13:07:21 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2564 <pre> Warning: invalid datum in quotation #{Procedure 8664} (&amp;warning) 'hello! The spirit of the warning is correct, but there should be follow-through in the form of replacing the (quote ...) form with syntax error code, as happens with other static errors e.g. Warning: invalid expression (#{Name lambda} ()) (&amp;syntax-error) 'syntax-error (Better would be for a run-time error to result, not just a bogus value.) The reasoning is the same as that for converting mutable to immutable values when they're quoted, and has to do with supporting cross-compilation and capability security applications. The prohibition is allowed by the Scheme reports (due to the specified syntax of the QUOTE special form). Best Jonathan </pre> Jonathan Rees 2012-12-01T14:03:48 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2563 <pre> Special Issue on Run-Time Systems and Target Platforms for Functional Languages Submission Deadline: 30 June 2013. Expected Publication Date: May 2014 Submission via: http://journals.cambridge.org/action/displaySpecialPage?pageId=4220 The Journal of Functional Programming will devote a special issue to implementation concerns, in particular, compilation and run-time techniques for the entire spectrum of target platforms, whether constructed in support of functional languages or not. Today's implementations of functional languages target a wide variety of platforms: machine code on traditional architectures, virtual machines designed to support functional languages, others of a more generic nature (such as the Java Virtual Machine and the .NET Common Language Infrastructure), embedded systems and GPUs, JavaScript, and others. The purpose of this special issue is to collect ideas on how implementations of functional languages bridge the gap between this variety of target platforms and their own world. La</pre> Michael Sperber 2012-11-20T19:48:23 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2563 <pre> Special Issue on Run-Time Systems and Target Platforms for Functional Languages Submission Deadline: 30 June 2013. Expected Publication Date: May 2014 Submission via: http://journals.cambridge.org/action/displaySpecialPage?pageId=4220 The Journal of Functional Programming will devote a special issue to implementation concerns, in particular, compilation and run-time techniques for the entire spectrum of target platforms, whether constructed in support of functional languages or not. Today's implementations of functional languages target a wide variety of platforms: machine code on traditional architectures, virtual machines designed to support functional languages, others of a more generic nature (such as the Java Virtual Machine and the .NET Common Language Infrastructure), embedded systems and GPUs, JavaScript, and others. The purpose of this special issue is to collect ideas on how implementations of functional languages bridge the gap between this variety of target platforms and their own world. La</pre> Michael Sperber 2012-11-20T19:48:23 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2562 <pre>Scheme 48 Development Tools (SDT) is an Eclipse IDE for Scheme 48 with the following features: - Customizable syntax highlighting for Scheme code and Configuration Language - Live-annotation of syntactic and semantic errors like unbound variables - Auto formatting and selection strategy for easy typing of Scheme syntax and s-expressions - Content assist - Customizable code templates - Expansion viewer for macro inspection and debugging - Outline of top-level bindings - Automatic expansion of macros to discover top-level bindings created by macros - Multi-file search for declarations - Wizard for fast and easy creation of new modules, interfaces and implementation files - Integration of the Scheme-48 interpreter - Support for the Scheme-48 module system SDT is available from: http://s48.org/sdt Enjoy! </pre> Marcus Crestani 2012-11-13T10:09:32 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2559 <pre>[Sent to multiple lists via bcc.] The seventh and semi-final draft is available at: http://trac.sacrideo.us/wg/raw-attachment/wiki/WikiStart/r7rs-draft-7.pdf This includes many changes from the 6th draft, including those resulting from the many formal (and informal) comments we received. Thanks to everyone who helped! The Steering Committee will form an electorate and call for ratification based on this draft, after which we will fix any errors in the eighth and final draft. Any issues arising after that point will be tracked separately in an errata list. A release of chibi-scheme with all changes up to this point will be made shortly, along with a full R7RS test suite. </pre> Alex Shinn 2012-11-10T06:30:04 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2558 <pre>Hello, I'm trying to build the development version (changeset 1607:2608abe6239a) on Windows 7 using the supplied instructions. I'm using the prebuilt Scheme48 1.8 from s48.org and Windows 7 SDK v7.1. The build fails during the execution of 'build-initial-image.bat', what it comes down to seems to be: Warning: undefined variables #{Package 249 user} set-port-crlf?! (&amp;warning) and later: Error: undefined variable set-port-crlf?! (package user) I've attached the full log. I don't have VS Express 2010 installed, but the C compilation on the next step seems to go just fine using msbuild. Warning: undefined variables #{Package 249 user} set-port-crlf?! (&amp;warning) scheme/platform-interfaces.scm scheme/rts-packages-32.scm scheme/interfaces.scm scheme/vm/shared-interfaces.scm scheme/packages.scm scheme/low-packages.scm scheme/rts-packages.scm scheme/comp-packages.scm scheme/initial-packages.scm build/initial</pre> Mikko Vanhatalo 2012-11-07T18:53:37 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2553 <pre>If you type "'" at the command line, the system writes back "\'". If you type "\'" in, the system fails, because read doesn't expect #\' to be escaped. The relevant code is in scheme/rts/{read|write}.scm I changed decode-escape in scheme/rts/read.scm to read #\' the way it reads #\\, rebuilt my system and now I can read the output of write even when the strings include #\'. I was fairly certain that read and write would be inverses of each other (w.r.t. strings), so now I'm wondering if my fix was correct, or if I'm misunderstanding things and have actually made things less correct. Heath </pre> Heath Putnam 2012-11-04T08:38:00 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2548 <pre>Mike: I noticed the presence of an apparent u-umlaut in your recent Scheme 48 sources. This raises an interesting question for me: How are various parts of the ecosystem supposed to know what the character set encoding of scheme files is? The question hasn't come up much previously because Scheme is so retro (or provincial) that most source files so far are encoded in 7-bit ASCII, which is a subset shared among UTF-8, Latin-1, etc., so until now it just hasn't mattered. This is a practical question, I don't mean to be pedantic. My emacs displayed the source in what I think was the intended way, but it feels like an accident that it did so. What if it had treated the source file as UTF-8 or Latin-5? What if it had paid attention to the Unix locale, and the locale specified an encoding different from what was intended? Similarly, there's the question of how the encoding is (or should be) determined by Scheme. I haven't looked at the Unicode support in Scheme 48 yet, but I'm guessing that the problem of decid</pre> Jonathan Rees 2012-10-26T21:01:04 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2543 <pre>Hey guys, I'm trying to load module definitions, and set up evaluation environments outside of the context of the command processor. The apis to do that seem to be lightly documented if at all though. I was wondering if any of you had some insight into the best way to do that. For instance, I'd like to : - load a set of files containing module definitions - create a new package with a subset of those modules opened, as well as standard modules included with scheme48 - evaluate code in that package Any help would be appreciated. I need this to replace the module set up directives in scsh, since the api the last version used have changed substantially. It would also be useful in countless other contexts, of course. -Roderic </pre> Roderic Morris 2012-10-22T00:40:50 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2533 <pre>I've just made two minor changes to the build system, namely: • replaced ‘echo &gt; /dev/null’ with ‘:’ (which is the Shell no-op command) in autogen.sh; • added a call to the ‘AC_LANG_SOURCE’ macro to m4/s48_inline.m4, to avoid a gratuitous GNU Autoconf warning. autogen.sh seems to run correctly with these changes applied. Please consider committing them to the main Scheme48 repository. PS. Are there any promotional materials (flyers, posters, videos, etc.) for Scheme48 that we can show or distribute on SFD 2012, BTW? </pre> Ivan Shmakov 2012-08-08T11:50:02 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2532 <pre> COMMERCIAL USERS OF FUNCTIONAL PROGRAMMING 2012 CUFP 2012 http://cufp.org/conference CALL FOR PARTICIPATION Copenhagen, Denmark Sep 13-15 Co-located with ICFP 2012 Sponsored by SIGPLAN Functional programming has been at the forefront of a new generation of programming technologies: Companies employing functional programming use it to enable more effective, robust, and flexible software development. The annual CUFP workshop is designed to serve the growing community of commercial users of functional programming: Practitioners meet and collaborate; language designers and users can share ideas about the future of their languages; experts share their expertise on practical functional programming. CUFP 2012 features introductory tutorials by top-notch language experts, advanced tutorials on specialized topics, and the final day of talks about industrial applications of functional programming. More information about CUFP 2012 are available on the</pre> Michael Sperber 2012-07-23T14:48:09 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2531 <pre>This message is being posted to various lists to inform members of the Scheme community on the development and current status of the next Scheme specification, often referred to as R7RS. In early 2010, two working groups, WG1 and WG2, were convened by the Scheme Language Steering Committee (SLSC) for the purpose of drafting a revision of the Scheme programming language specification(s). Working group 1 was charged with the task of proposing a new specification for Scheme whose scope is comparable to that of the R5RS, with features that could lay the foundation for a larger language whose specification is being developed by working group 2. On 15 February 2012, WG1 and the SLSC solicited public comments on the sixth draft version of the "small" language ( http://www.scheme-reports.org/2012/call1.html ). That comment period was to end on 30 June 2012. While reminding everyone of that comment period, the SLSC is extending the deadline through 15 July 2012. We plan to call for a vote on the proposed specifica</pre> William D Clinger 2012-06-29T20:45:20 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2528 <pre>See attached. I still need to ‘export MAKE=gmake’ before running autogen.sh, but at least now autogen.sh can be made to work at all. Robert Ransom </pre> Robert Ransom 2012-06-21T21:05:19 http://comments.gmane.org/gmane.lisp.scheme.scheme48/2525 <pre> COMMERCIAL USERS OF FUNCTIONAL PROGRAMMING 2012 CUFP 2012 http://cufp.org/conference CALL FOR PRESENTATIONS Copenhagen, Denmark Sep 13-15 Co-located with ICFP 2012 Sponsored by SIGPLAN Talk Proposal Submission Deadline 29 June 2012 The annual CUFP workshop is a place where people can see how others are using functional programming to solve real world problems; where practitioners meet and collaborate; where language designers and users can share ideas about the future of their favorite language; and where one can learn practical techniques and approaches for putting functional programming to work. Giving a CUFP Talk ================== If you have experience using functional languages in a practical setting, we invite you to submit a proposal to give a talk at the workshop. We're looking for two kinds of talks: Experience reports are typically 25 minutes long, and aim to inform participants about how functional programming plays out in </pre> Michael Sperber 2012-06-14T16:06:34 Search the mailing list at Gmane query http://search.gmane.org/?group=$group=gmane.lisp.scheme.scheme48