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[CfP] ELS 2026 (deadline extension) -- 19th European Lisp Symposium
by Didier Verna 11 Mar '26

11 Mar '26

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 19th European Lisp Symposium Call for Papers May 11-12 2026 Skład Długa, Kraków, Poland https://www.european-lisp-symposium.org/2026 Sponsored by Keepit ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Important News ~~~~~~~~~~~~~~~ - First keynote announced Lambda: the Ultimate Paradigm -- François-René Rideau, Gerbil Scheme - Submission deadline extended by one week! Important Dates ~~~~~~~~~~~~~~~ - Submission deadline: Mar 22 2026 *** extended *** - Author notification: Apr 12 2026 - Final papers due: Apr 26 2026 - Early Registration: May 03 2026 - Symposium: May 11-12 2026 Scope ~~~~~ The European Lisp Symposium is a premier forum for the discussion and dissemination of all aspects of design, implementation, and application of any of the Lisp dialects, including Common Lisp, Scheme, Emacs Lisp, Clojure, Racket, ACL2, AutoLisp, ISLISP, Dylan, SKILL, Hy, Shen, Carp, Janet, uLisp, Picolisp, Gamelisp, TXR, and so on. We encourage everyone interested in Lisp to participate. The European Lisp Symposium invites high quality papers about novel research results, insights and lessons learned from practical applications, and educational perspectives. We also encourage submissions about known ideas as long as they are presented in a new setting and/or in a highly elegant way. Topics include but are not limited to: - context-, aspect-, domain-oriented and generative programming - macro-, reflective-, meta- and/or rule-based development approaches - language design and implementation - language integration, inter-operation, and deployment - development methodologies, support, and environments - educational approaches and perspectives - experience reports and case studies Technical Program ~~~~~~~~~~~~~~~~~ We invite submissions in the following forms. Papers and experience reports must not overlap significantly with the authors’ previously published work in a peer reviewed publication, and must not be under review on another journal or conference. Also, authors must agree with our publication ethics and malpractice statement (cf. https://european-lisp-symposium.org/pepms.html) * Papers: technical papers of up to 8 pages that describe original results or explain known ideas in new and elegant ways. * Experience reports: papers of up to 6 pages describing a successful use of a Lisp dialect and/or analyzing obstacles that have kept it from working in practice. * Tutorials: abstracts of up to 4 pages for in-depth presentations about topics of special interest. * Demonstrations: abstracts of up to 4 pages for demonstrations of tools, libraries, and applications. For information on the submission format, please refer to the "Submission" section at https://www.european-lisp-symposium.org/2025. Submissions should be uploaded to Easy Chair at the following link: http://www.easychair.org/conferences/?conf=els20256 Note: to help us with the review process please indicate the type of submission in the title field in the submission form. Programme Chair ~~~~~~~~~~~~~~~ Mark Evenson Organizing Chair ~~~~~~~~~~~~~~~~ Didier Verna, EPITA / LRE, France Programme Committee ~~~~~~~~~~~~~~~~~~~ Alan Ruttenberg, USA Dave Cooper, Genworks, USA Dimitris Vyzovitis, Mighty Gerbils Eitaro Fukamachi, Japan Marc Battyani, Enfabrica, USA Mark David, Genworks, USA Michael Raskin, LaBRI, France Robert Goldman, SIFT, USA Jason Hemann, Seton Hall University, USA Kristopher Micinski, Syracuse University, USA Local Chairs ~~~~~~~~~~~~ Wojciech Gac, Keepit, Poland Michał Herda, Keepit, Poland Virtualization Team ~~~~~~~~~~~~~~~~~~~ Georgiy Tugai, Configura, Sweden Yukari Hafner, Shirakumo.org, Switzerland -- Resistance is futile. You will be jazzimilated. Lisp, Jazz, Aïkido: http://www.didierverna.info

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eval-when mysteries.
by Marco Antoniotti 07 Mar '26

07 Mar '26

Hi I have a test file that contains the following (and nothing more) (eval-when (:load-toplevel :execute) (format t "It's eval time~%") (defparameter *evfoo* "eval-when foo")) This is what happens in SBCL. CL-USER> *(load "ew.lisp")* It's eval time *T* CL-USER> **evfoo** *"eval-when foo"* CL-USER> While in LW (and, similarly, in ECL) this happens CL-USER 20 > *(load "ew.lisp")* ; Loading text file /Users/marcoxa/Projects/Lang/CL/Temp/ew.lisp It's eval time #P"/Users/marcoxa/Projects/Lang/CL/Temp/ew.lisp" CL-USER 21 > **ewfoo** Error: The variable *EWFOO* is unbound. 1 (continue) Try evaluating *EWFOO* again. 2 Specify a value to use this time instead of evaluating *EWFOO*. 3 Specify a value to set *EWFOO* to. 4 (abort) Return to top loop level 0. Type :b for backtrace, or :c <option number> to proceed, or :a to abort. Type :bug-form "<subject>" for a bug report template or :? for other options. CL-USER 22 : 1 > Any hermeneutics about this? Cheers -- Marco Antoniotti, Professor, Director tel. +39 - 02 64 48 79 01 DISCo, University of Milan-Bicocca U14 2043 http://dcb.disco.unimib.it Viale Sarca 336 I-20126 Milan (MI) ITALY REGAINS: https://regains.disco.unimib.it/

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Examples of Method Combinations, Multiple Dispatch, MOP
by Faré 02 Mar '26

02 Mar '26

Dear Pro, I'm currently writing a book on OOP, and after exhausting the usual stuff, I'm now at advanced topics that only Common Lisp and other Lisp dialects tackle, including Method Combinations, Multiple Dispatch and Meta-Object Protocols. Are there good motivational examples that fit in a couple of pages? And/or are there good free software or source-available programs and libraries that are worth citing and sending my readers to, to illustrate the power and interest of those techniques? For good uses the standard CLOS method combination and multiple dispatch, I am quite familiar with ASDF; and for the multiple dispatch at least, I can cite the extended version of my ELS 2014 paper. What other code bases, papers or articles may I cite? —♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics• http://fare.tunes.org “The reason truth is stranger than fiction is that fiction has to make sense.”

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Admin issues
by Sky Hester 28 Feb '26

28 Feb '26

Hi all, In theory I am the current list administrator, however it is no longer possible for me to access any admin controls. That means some posts can't be sent out which require admin approval, among other things. Would anyone be interested in helping out? Additionally, if anyone is interested in taking over as list administrator, I haven't been actively involved in the mailing list discussions for a while and would be happy to hand over the role to someone. Kind regards, Sky

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[CfP] ELS 2026, the 19th European Lisp Symposium
by Didier Verna 19 Jan '26

19 Jan '26

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 19th European Lisp Symposium Call for Papers May 11-12 2026 Skład Długa, Kraków, Poland https://www.european-lisp-symposium.org/2026 Sponsored by Keepit ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Important Dates ~~~~~~~~~~~~~~~ - Submission deadline: Mar 15 2026 - Author notification: Apr 12 2026 - Final papers due: Apr 13 2026 - Early Registration: Apr 26 2026 - Symposium: May 11-12 2026 Scope ~~~~~ The European Lisp Symposium is a premier forum for the discussion and dissemination of all aspects of design, implementation, and application of any of the Lisp dialects, including Common Lisp, Scheme, Emacs Lisp, Clojure, Racket, ACL2, AutoLisp, ISLISP, Dylan, SKILL, Hy, Shen, Carp, Janet, uLisp, Picolisp, Gamelisp, TXR, and so on. We encourage everyone interested in Lisp to participate. The European Lisp Symposium invites high quality papers about novel research results, insights and lessons learned from practical applications, and educational perspectives. We also encourage submissions about known ideas as long as they are presented in a new setting and/or in a highly elegant way. Topics include but are not limited to: - context-, aspect-, domain-oriented and generative programming - macro-, reflective-, meta- and/or rule-based development approaches - language design and implementation - language integration, inter-operation, and deployment - development methodologies, support, and environments - educational approaches and perspectives - experience reports and case studies Technical Program ~~~~~~~~~~~~~~~~~ We invite submissions in the following forms. Papers and experience reports must not overlap significantly with the authors’ previously published work in a peer reviewed publication, and must not be under review on another journal or conference. Also, authors must agree with our publication ethics and malpractice statement (cf. https://european-lisp-symposium.org/pepms.html) * Papers: technical papers of up to 8 pages that describe original results or explain known ideas in new and elegant ways. * Experience reports: papers of up to 6 pages describing a successful use of a Lisp dialect and/or analyzing obstacles that have kept it from working in practice. * Tutorials: abstracts of up to 4 pages for in-depth presentations about topics of special interest. * Demonstrations: abstracts of up to 4 pages for demonstrations of tools, libraries, and applications. For information on the submission format, please refer to the "Submission" section at https://www.european-lisp-symposium.org/2025. Submissions should be uploaded to Easy Chair at the following link: http://www.easychair.org/conferences/?conf=els20256 Note: to help us with the review process please indicate the type of submission in the title field in the submission form. Programme Chair ~~~~~~~~~~~~~~~ Mark Evenson Organizing Chair ~~~~~~~~~~~~~~~~ Didier Verna, EPITA / LRE, France Programme Committee ~~~~~~~~~~~~~~~~~~~ Alan Ruttenberg, USA Dave Cooper, Genworks, USA Dimitris Vyzovitis, Mighty Gerbils Eitaro Fukamachi, Japan Marc Battyani, Enfabrica, USA Mark David, Genworks, USA Michael Raskin, LaBRI, France Robert Goldman, SIFT, USA -- tbe Local Chairs ~~~~~~~~~~~~ Wojciech Gac, Keepit, Poland Michał Herda, Keepit, Poland Virtualization Team ~~~~~~~~~~~~~~~~~~~ Georgiy Tugai, Configura, Sweden Yukari Hafner, Shirakumo.org, Switzerland -- Resistance is futile. You will be jazzimilated. Lisp, Jazz, Aïkido: http://www.didierverna.info

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GO stuff
by Marco Antoniotti 30 Dec '25

30 Dec '25

Hello I did not mention GO out of context in my previous emails. I would like to know the opinion of this forum about what would be the most likely CL - portable - substitute to implement *channels*. *usocket *and/or *bordeaux-threads* are what I'd target. In GO you have *chan *items and you can send and receive from them using the *<-* operator. AFAIU these channels are blocking. Any suggestions? Thanks Happy Holidays Marco -- Marco Antoniotti, Professor, Director tel. +39 - 02 64 48 79 01 DISCo, University of Milan-Bicocca U14 2043 http://dcb.disco.unimib.it Viale Sarca 336 I-20126 Milan (MI) ITALY REGAINS: https://regains.disco.unimib.it/

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READ-SEQUENCE and USOCKET
by Marco Antoniotti 18 Dec '25

18 Dec '25

Hi I am reading from a uosocket:stream-usocket. My sequence is 100 octets long, but I know the other party is sending UP TO 100 octets. If the other party sends less than 100 octets, read-sequence/usocket-stream (at least the version on LW) hangs. Should I just do a loop, checking for the "end marker"? Thanks All the best -- Marco Antoniotti

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Re: READ-SEQUENCE and USOCKET
by Marco Antoniotti 18 Dec '25

18 Dec '25

Thank you Vibhu That is exactly what I came up with, and it seems to work decently well. Only thing, I put a non-zero timeout. All the best Marco On Thu, Dec 18, 2025 at 10:18 AM Vibhu Mohindra <vibhu.mohindra(a)gmail.com> wrote: > -------- Forwarded Message -------- > Subject: Re: READ-SEQUENCE and USOCKET > Date: Thu, 18 Dec 2025 10:14:57 +0100 > From: Vibhu Mohindra <vibhu.mohindra(a)gmail.com> > To: pro(a)common-lisp.net > > How are you doing Marco? > > I'm looking at usocket-0.8.4. It may be worth exploring some of these > aspects I see in its code: > 1. option.lisp allows: (setf (socket-option mysocket :receive-timeout) ...) > 2. usocket.lisp defines a generic socket-receive. It's only implemented > for > UDP sockets but I don't see why it shouldn't be implementable for > stream-sockets too. > > Otherwise I don't see a better solution in usocket than inefficiently > checking for and reading a byte at a time, like this. > > (defun read-available-vector (vector socket &key (start 0) (end nil)) > "Reads whatever is presently available in SOCKET without hanging. > SOCKET and VECTOR are assumed to have elts of type (unsigned-byte 8). > Returns first unwritten position in VECTOR and whether at end-of-file." > (when (null end) (setq end (length vector))) > (assert (<= 0 start end (length vector))) > (flet ((socket-readyp () > (wait-for-input socket :timeout 0 :ready-only t))) > (do ((i start (1+ i))) > ((or (>= i end) (not (socket-readyp))) > (values i nil)) > (let ((b (read-byte (socket-stream stream) nil nil))) > (unless b (return (values i t))) > (setf (aref vector i) b))))) > > -- > Vibhu > -- Marco Antoniotti, Professor, Director tel. +39 - 02 64 48 79 01 DISCo, University of Milan-Bicocca U14 2043 http://dcb.disco.unimib.it Viale Sarca 336 I-20126 Milan (MI) ITALY REGAINS: https://regains.disco.unimib.it/

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leave
by B. Mansurov 17 Dec '25

17 Dec '25

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Correction of Georgiy's name, contact info for him
by David Cooper 17 Dec '25

17 Dec '25

Apologies to Georgiy for working from my (apparently failing) memory and neglecting to take a few seconds to look up his last name, which is Tugai, not Tsukai. I wanted to make sure he gets recognized for all his work. Anyone wishing to contact him, let me know and I'll put you in touch, he's active on IRC, I won't presume to dox him any more on these lists, but anyone wishing to contact him let me know and I'll put you in touch (he is on mailto:clo-devel@common-lisp.net as well). Dave

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