pro February 2014

pro@common-lisp.net

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Demographics of lisp users
by Matthew Swank 16 Feb '14

16 Feb '14

Are there any good resources about what kinds of people are (currently) using lisp?

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ELS 2014 Registration now open / 2nd Call for papers
by Didier Verna 11 Feb '14

11 Feb '14

ELS'14 - 7th European Lisp Symposium IRCAM, Paris, France May 5-6, 2014 http://www.european-lisp-symposium.org/ Latest News: * Registration is now open. Early registration fee until April 13. See http://www.european-lisp-symposium.org/content-registration-full.html * Submission deadline is approaching. Still one month to submit a paper! * Thanks to our new sponsors, Lispworks and Franz Inc.! http://www.lispworks.com/ http://franz.com/ The purpose of the European Lisp Symposium is to provide a forum for the discussion and dissemination of all aspects of design, implementation and application of any of the Lisp and Lisp-inspired dialects, including Common Lisp, Scheme, Emacs Lisp, AutoLisp, ISLISP, Dylan, Clojure, ACL2, ECMAScript, Racket, SKILL, Hop and so on. We encourage everyone interested in Lisp to participate. The 7th 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 Please note that IRCAM, the conference venue, is a French institute for research on music and acoustics. Submissions relating Lisp to music or other acoustical matters will hence be particularly welcome, although given no heightened favor during the review process. We invite submissions in the following forms: Papers: Technical papers of up to 8 pages that describe original results or explain known ideas in new and elegant ways. Demonstrations: Abstracts of up to 2 pages for demonstrations of tools, libraries, and applications. Tutorials: Abstracts of up to 4 pages for in-depth presentations about topics of special interest for at least 90 minutes and up to 180 minutes. The symposium will also provide slots for lightning talks, to be registered on-site every day. All submissions should be formatted following the ACM SIGS guidelines and include ACM classification categories and terms. For more information on the submission guidelines and the ACM keywords, see: http://www.acm.org/sigs/publications/proceedings-templates and http://www.acm.org/about/class/1998. Important dates: - TODAY: Mark your calendar. Start planning now! - 09 Mar 2014: Submission deadline - 31 Mar 2014: Notification of acceptance - 13 Apr 2014: Early registration deadline - 21 Apr 2014: Final Papers due - 05 May 2014: Symposium. Join us there! Programme chair: Kent Pitman, Hypermeta Inc., U.S.A. Local chairs: Didier Verna, EPITA Research Lab, France Gérard Assayag, IRCAM, Paris, France Programme committee: To be announced later Local organizers: Daniela Becker, EPITA Research Lab, France Sylvie Benoit, IRCAM, Paris, France Search Keywords: #els2014, ELS 2014, ELS '14, European Lisp Symposium 2014, European Lisp Symposium '14, 7th ELS, 7th European Lisp Symposium, European Lisp Conference 2014, European Lisp Conference '14 Ircam STMS Lab, IRCAM / CNRS / UPMC -- Please help crowdfund my next Jazz quartet album !! http://www.kisskissbankbank.com/quartet-the-second-album Lisp, Jazz, Aïkido: http://www.didierverna.info

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Congruence of lamda-lists of methods with their generic-function
by Jean-Claude Beaudoin 09 Feb '14

09 Feb '14

Hello CL Pros, I am trying to understand the meaning in conforming ANSI CL of the following code snippet and I am not quite sure what to think of it: (defgeneric foo (a b &key)) (defmethod foo (a b &key c d) (or c d 42)) At this point should a call to foo accept any keyword argument, no keyword argument or only :c and/or :d? What would be the outcome of this: (foo 1 2 :d 3) Is it an error being signaled or the value 3 being returned? I am inclined to believe that an error should be signaled, since the generic function lambda-list contains no explicit keyword argument and no &allow-other-keys. Reading CLHS 7.6.4 it seems to me that (defgeneric foo (a b &key)) and (defgeneric foo (a b &key &allow-other-keys)) are two different things as to the set of keyword arguments they each will accept. The first one being the empty set and the second the set of all possible sequence of keyword arguments (limits set aside). Am I right? Also if I go for (defgeneric (a b &key &allow-other-keys)), is the lambda-list of the method as here above still congruent? Doesn't it need to be rewritten as: (defmethod foo (a b &key c d &allow-other-keys) ...) or (defmethod foo (a b &rest other-args) ...) to be properly congruent? Thanks, Jean-Claude Beaudoin

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pro February 2014