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Re: Question about CL-PPCRE
by Marco Antoniotti 24 Jun '26

24 Jun '26

Thanks Martin. That's it. Workarounds? Shall I just roll out my own replacement function? Note that in my case I really just need (replace-string-in <source string> <replacement indicator string> <replacement>) MA On Wed, Jun 24, 2026 at 12:09 PM Martin Simmons <martin(a)lispworks.com> wrote: > >>>>> On Tue, 23 Jun 2026 20:47:32 +0200, Marco Antoniotti (as marco dot > antoniotti at unimib dot it) said: > > > > Hi > > > > I am sure I missed something in the CL-PPCRE documentation, but here it > is. > > > > I am fooling around with a C tokenizer and I am running into the > following > > problem. > > > > The string esre contains the "escape sequences" for C (and Perl, etc etc) > > > > CL Prompt > esre > > "(\\\\(['\\\"\\?\\\\abfnrtv]|[0-7]{1,3}|x[a-fA-F0-9]+))" > > > > If I use CL-PPCRE:REPLACE-ALL I get the following (I tried to boil it > down): > > > > CL Prompt > (regex-replace-all "\\$<ES>" "/$<ES>/" esre) > > "/(\\(['\\\"\\?\\abfnrtv]|[0-7]{1,3}|x[a-fA-F0-9]+))/" > > T > > > > Apart from the bounding slashes, I would have expected the result of > > CL-PPCRE:REPLACE-ALL not to return a shorter string. > > > > What exactly (backslash escaping for sure) am I missing? > > It looks like an undocumented feature of the replacement string: \\ is > converted to a single backslash by CL-PPCRE::BUILD-REPLACEMENT-TEMPLATE. > That > means it will always return a shorter string when \\ is present in the > replacement string and if you want \\ in the output then you'll need to use > \\\\ (i.e. 8 backslashes in the Lisp syntax of that string!). > > Also, to make it more confusing, if \ is followed by anything other than \ > & ` > ' digits or {digits} then it is also treated as a single backslash. i.e. > \a > is \a. > > -- > Martin Simmons > LispWorks Ltd > http://www.lispworks.com/ > > _______________________________________________ > Lisp Hug - the mailing list for LispWorks users > lisp-hug(a)lispworks.com > http://www.lispworks.com/support/lisp-hug.html > -- 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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Question about CL-PPCRE
by Marco Antoniotti 24 Jun '26

24 Jun '26

Hi I am sure I missed something in the CL-PPCRE documentation, but here it is. I am fooling around with a C tokenizer and I am running into the following problem. The string *esre* contains the "escape sequences" for C (and Perl, etc etc) CL Prompt > *esre* "(\\\\(['\\\"\\?\\\\abfnrtv]|[0-7]{1,3}|x[a-fA-F0-9]+))" If I use CL-PPCRE:REPLACE-ALL I get the following (I tried to boil it down): CL Prompt > *(regex-replace-all "\\$<ES>" "/$<ES>/" esre)* "/(\\(['\\\"\\?\\abfnrtv]|[0-7]{1,3}|x[a-fA-F0-9]+))/" T Apart from the bounding slashes, I would have expected the result of CL-PPCRE:REPLACE-ALL not to return a shorter string. What exactly (backslash escaping for sure) am I missing? Thanks. -- MA

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CL-INTERPOL and CL-PPCRE
by Marco Antoniotti 17 Jun '26

17 Jun '26

Hi I would like to munge regex strings to interpolate substrings in them (I know you can do that in CL-PPCRE using the SEXP based regexps). Something equivalent *(defvar L "[A-Za-z]")* *(scan #?"|${L}+|" " |foobar|...")* But I would like to build the interpolated string dynamically, i.e., *before* I create the *L* variable. In other words, I would like to interpolate at the latest possible time. I know I am doing something wrong. Thanks -- Marco

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[Last CfPart] ELS 2026, 19th European Lisp Symposium
by Didier Verna 10 May '26

10 May '26

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 19th European Lisp Symposium Call for Participation May 11-12 2026 Skład Długa, Kraków, Poland https://www.european-lisp-symposium.org/2026 Sponsored by Keepit and SISCOG ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Important News ~~~~~~~~~~~~~~~ - Programme and remote attendance instructions now available - Keynotes announced Lambda: the Ultimate Paradigm -- François-René Rideau, Gerbil Scheme McCLIM and ECL -- Daniel Kochmański Important Dates ~~~~~~~~~~~~~~~ - 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 Programme Chair ~~~~~~~~~~~~~~~ Mark Evenson, ABCL.org, Austria Organizing Chair ~~~~~~~~~~~~~~~~ Didier Verna, EPITA / LRE, France Programme Committee ~~~~~~~~~~~~~~~~~~~ Alan Ruttenberg, USA Dave Cooper, Genworks, USA Dimitris Vyzovitis, Mighty Gerbils Eitaro Fukamachi, Japan Jason Hemann, Seton Hall University, USA Kristopher Micinski, Syracuse University, USA Marc Battyani, Enfabrica, USA Mark David, USA Michael Raskin, LaBRI, France Robert Goldman, SIFT, USA Thomas de Grivel, France 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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[CfPart] ELS 2026, the 19th European Lisp Symposium
by Didier Verna 07 Apr '26

07 Apr '26

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 19th European Lisp Symposium Call for Participation May 11-12 2026 Skład Długa, Kraków, Poland https://www.european-lisp-symposium.org/2026 Sponsored by Keepit and SISCOG ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Important News ~~~~~~~~~~~~~~~ - Registration is now open - Keynotes announced Lambda: the Ultimate Paradigm -- François-René Rideau, Gerbil Scheme McCLIM and ECL -- Daniel Kochmański Important Dates ~~~~~~~~~~~~~~~ - Early Registration Deadline: 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 Programme Chair ~~~~~~~~~~~~~~~ Mark Evenson, ABCL.org, Austria Organizing Chair ~~~~~~~~~~~~~~~~ Didier Verna, EPITA / LRE, France Programme Committee ~~~~~~~~~~~~~~~~~~~ Alan Ruttenberg, USA Dave Cooper, Genworks, USA Dimitris Vyzovitis, Mighty Gerbils Eitaro Fukamachi, Japan Jason Hemann, Seton Hall University, USA Kristopher Micinski, Syracuse University, USA Marc Battyani, Enfabrica, USA Mark David, USA Michael Raskin, LaBRI, France Robert Goldman, SIFT, USA Thomas de Grivel, France 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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[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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