eurolisp August 2005

eurolisp@common-lisp.net

3 participants
6 discussions

[eurolisp] Student internship
by Thomas F. Burdick 22 Jul '06

22 Jul '06

If you know anybody who would be interested in this, please pass it along. thanks! The Cadence Design Systems VCAD group in Munich, Germany, is looking for a University student intern for a period of two to six months. You would be working on one of the following projects, depending on our needs and your strengths: * Project planning and scheduling software. This will be used to track our utilization of our developers, and to aid in planning for on-going and future projects. * Package configuration management software. We deliver to our customers custom configurations built out of a large number of pieces of software and other intellectual property. We are rewriting the system we use to specify, track, and build these deliveries. * Common Lisp bindings to a large C++ library. We are working on a system to automatically generate the low-level bindings, as well as designing a higher-level interface meant for direct use by application programmers. The implementation language for all of the above will most likely be Common Lisp, although lesser languages such as Java, Perl, and Tcl may play a role as well. We are looking for someone who either has experience programming in a Lisp language, or is interested in learning Lisp in a production environment, and is comfortable in several mutually unrelated programming languages (eg, C, Smalltalk, and PostScript; or Java, Prolog, and SPARC assembly language). Our environment is Unix-based (Solaris and Linux), so you should have a basic familiarity with Unix. Other things that would be nice, but are not required: some theoretical familiarity with relational databases (eg, you took a database class or read the textbook from one); Windows programming experience; Oracle experience; experience with C++, SQL, and Prolog. Virtual CAD (VCAD) is a group within Cadence providing EDA (Electronic Design Automation) related services. The internship is with the software development group within VCAD. Cadence's software products are scripted with the SKILL language, a Lisp language with two dialects: one Franz Lisp-like dialect, and one Scheme-like dialect. The VCAD software group also uses Common Lisp where appropriate. If you are interested, please contact Thomas F. Burdick (tfb(a)cadence.com), and Jim Newton (jimka(a)cadence.com) For more information about VCAD, see: http://www.cadence-europe.com/solutions/vpage.cfm?pID=1 http://www.cadence-europe.com/eEuronews/mar_05/features.html

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[eurolisp] cl-launch.sh
by Faré 24 Aug '05

24 Aug '05

It's just a silly little script, but I'm proud of cl-launch.sh: http://www.cliki.net/cl-launch It should make it much easier to write little command-line utilities in semi-portable Common Lisp. I've tried to make it robust, and as a result it's somewhat over-engineered and difficult to hack. But hopefully, it is well-documented and easy to use. Please help me test it, spread it, etc. It's one step to integrating common lisp to the unix command line (until the unix command line can be integrated into common lisp). I hope some of you find it useful. Satisfied user messages and hacker improvements welcome. So are ports to more Common Lisp implementations... [ François-René ÐVB Rideau | Reflection&Cybernethics | http://fare.tunes.org ] Most economic fallacies derive... from the tendency to assume that there is a fixed pie, that one party can gain only at the expense of another. -- Milton Friedman

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[eurolisp] [ANN] OOPSLA'05 CLOS tutorial
by Pascal Costanza 22 Aug '05

22 Aug '05

OOPSLA'05 tutorial on generic functions and the CLOS Metaobject Protocol ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Town and Country Resort & Convention Center, San Diego, California Sunday, October 16, 2005, 13:30 - 17:00 See http://p-cos.net/oopsla05-tutorial.html Abstract. The Common Lisp Object System (CLOS) is unique in two ways. + In most OOP languages, methods belong to classes and are invoked by sending messages. In CLOS, methods belong to generic functions instead of classes, and those generic functions select and execute the correct method according to the types of the arguments they receive. + The CLOS Metaobject Protocol (MOP) specifies how its essential building blocks are to be implemented in CLOS itself. This allows extending its object model with metaclasses that change important aspects of CLOS for a well-defined scope. This tutorial introduces these two notions. I will develop - live during the tutorial - the code for an interpreter for generic functions that performs selection and execution of methods. I will then discuss how that code can be extended to introduce, for example, multimethods and AOP-style advices, and sketch how generic functions are implemented efficiently in the "real" world. In the second part, I will illustrate the extensibility of the CLOS MOP by implementing - live - the (hashtable-based) Python object model as a metaclass. Other practical extensions based on the CLOS MOP are also sketched, like object-relational mappings, interfaces to foreign-language objects, and domain-specific annotations in classes. The audience will learn about the basic concepts of generic functions and metaobject protocols. They will get the necessary insights and pointers to existing literature and online material to deepen their knowledge. The focus of the tutorial is not on technical details but on the general ideas. A good understanding of class-based OOP is required. Experience with Lisp may be helpful, but the tutorial is specifically targeted at non-Lispers. Feel free to contact me if you have any questions and/or suggestions. Pascal

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[eurolisp] [ANN] First public release of ContextL
by Pascal Costanza 22 Aug '05

22 Aug '05

Hi everyone, I have just uploaded a first release of ContextL. It's both a non- trivial example of using the CLOS MOP and a full-fledged library in its own right, providing constructs for context-oriented programming. See http://common-lisp.net/project/closer/contextl.html for more information. Cheers, Pascal -- OOPSLA'05 tutorial on generic functions & the CLOS Metaobject Protocol ++++ see http://p-cos.net/oopsla05-tutorial.html for more details ++++ Pascal Costanza, mailto:pc@p-cos.net, http://p-cos.net Vrije Universiteit Brussel, Programing Technology Lab Pleinlaan 2, B-1050 Brussel, Belgium

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[eurolisp] [ANN] A few announcements
by Pascal Costanza 09 Aug '05

09 Aug '05

Hi, My website has moved to a new location and has a new design. You can now find it at http://p-cos.net This affects a few Lisp-related pages. Especially: - My "highly opinionated" Lisp guide is now at http://p-cos.net/lisp/ guide.html - the old location at www.pascalcostanza.de / www.cs.uni- bonn.de will be removed soon. - The archive for the 1st European Lisp and Scheme workshop has moved to http://p-cos.net/lisp-ecoop/ - I won't remove the old archive soon, but cannot guarantee any degree of longevity. Note that the site for the 2nd instance of that workshop is not affected since it is maintained by Hans Huebner. - On a related note, I am going to give a tutorial about generic functions and the CLOS Metaobject Protocol at this year's OOPSLA. See http://p-cos.net/oopsla05-tutorial.html (The need for a tutorial website was the main motivation to finally get the new website up and running.) I appreciate if people who have linked to the material above could update the respective links. Thanks a lot! Cheers, Pascal -- A discussion that tries to kill a useful feature is not a "practical" discussion but a "religious" one. - Kent M. Pitman

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[eurolisp] [ANN] Closer Project: new software versions
by Pascal Costanza 03 Aug '05

03 Aug '05

Hi, New versions of MOP Feature Tests and Closer to MOP are available. MOP Feature Tests checks whether CLOS MOP features, as specified in "The Art of the Metaobject Protocol", are available in a given Common Lisp implementation. Closer to MOP provides a compatibility layer that irons out some of the incompatibilities across various CLOS MOP implementations. Highlights of the new versions: - A number of new implementations are now supported, including Allegro Common Lisp 7.0, CLisp 2.34, CMU CL 19b, LispWorks Professional 4.4.5, Macintosh Common Lisp 5.1, OpenMCL 0.14.3 and SBCL 0.9.3. - The software is now available as a set of darcs repositories. - Various fixes in Closer to MOP. - Added a convenience method ensure-method. - Switched to an MIT/BSD-style license. I am using the Closer to MOP compatibility layer for my own software, which consists of non-trivial extensions of CLOS. This has led to overall improvements of stability. See the project website at http://common-lisp.net/project/closer/ for further details. Cheers, Pascal -- Tyler: "How's that working out for you?" Jack: "Great." Tyler: "Keep it up, then."

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eurolisp August 2005