Lecture Notes in Computer Science 5161

Transcription

1 Lecture Notes in Computer Science 5161 Commenced Publication in 1973 Founding and Former Series Editors: Gerhard Goos, Juris Hartmanis, and Jan van Leeuwen Editorial Board David Hutchison Lancaster University, UK Takeo Kanade Carnegie Mellon University, Pittsburgh, PA, USA Josef Kittler University of Surrey, Guildford, UK Jon M. Kleinberg Cornell University, Ithaca, NY, USA Alfred Kobsa University of California, Irvine, CA, USA Friedemann Mattern ETH Zurich, Switzerland John C. Mitchell Stanford University, CA, USA Moni Naor Weizmann Institute of Science, Rehovot, Israel Oscar Nierstrasz University of Bern, Switzerland C. Pandu Rangan Indian Institute of Technology, Madras, India Bernhard Steffen University of Dortmund, Germany Madhu Sudan Massachusetts Institute of Technology, MA, USA Demetri Terzopoulos University of California, Los Angeles, CA, USA Doug Tygar University of California, Berkeley, CA, USA Gerhard Weikum Max-Planck Institute of Computer Science, Saarbruecken, Germany

2 Rinus Plasmeijer Viktória Zsók (Eds.) Central European Functional Programming School Second Summer School, CEFP 2007 Cluj-Napoca, Romania, June 23-30, 2007 Revised Selected Lectures 13

3 Volume Editors Viktória Zsók Eötvös Loránd University, Faculty of Informatics 1117 Budapest, Hungary {hz, Rinus Plasmeijer University of Nijmegen, Faculty of Science 6500 GL Nijmegen, The Netherlands Babeş-Bolyai University Cluj-Napoca, Romania Library of Congress Control Number: CR Subject Classification (1998): D.1.1, D.3.2, F.3.3, D.2, D.1.5 LNCS Sublibrary: SL 1 Theoretical Computer Science and General Issues ISSN ISBN Springer Berlin Heidelberg New York ISBN Springer Berlin Heidelberg New York This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, re-use of illustrations, recitation, broadcasting, reproduction on microfilms or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer. Violations are liable to prosecution under the German Copyright Law. Springer is a part of Springer Science+Business Media springer.com Springer-Verlag Berlin Heidelberg 2008 Printed in Germany Typesetting: Camera-ready by author, data conversion by Scientific Publishing Services, Chennai, India Printed on acid-free paper SPIN: /

4 Preface This volume presents the revised lecture notes of selected talks given at the second Central European Functional Programming School, CEFP 2007, held June 23 30, 2007 at Babeş-Bolyai University, Cluj-Napoca, Romania. The summer school was organized in the spirit of the advanced programming schools. CEFP focuses on involving an ever-growing number of students, researchers, and teachers from central, and eastern European countries. We were glad to welcome the invited lecturers and the participants: 15 professors and 30 students from 9 different universities. The intensive program offered a creative and inspiring environment and a great opportunity to present and exchange ideas in new topics of functional programming. The lectures covered a wide range of topics like interactive work flows for the Web, proving properties of lazy functional programs, lambda calculus and abstract lambda calculus machines, programming in Ωmega, object-oriented functional programming, and refactoring in Erlang. We are very grateful to the lecturers and researchers for the time and the effort they devoted to the talks and the revised lecture notes. The lecture notes were each carefully checked by reviewers selected from experts of functional programming. Afterwards the papers were revised once more by the lecturers. This revision process guaranteed that only high-quality papers are accepted in the volume of the lecture notes. The PhD students were provided with a workshop, held in conjunction with the summer school. The workshop was an ideal opportunity to exchange ideas and get feedback from the lecturers about their research work. The reviewers decided to include the best papers in the revised volume of the summer school. Finally, the paper of Jan Martin Jansen was chosen as the student paper out of six presentations. We would like to thank the work of all the members of the Program Committee and the Organizing Committee. The web page for the summer school can be found at cefp2007/. June 2008 Rinus Plasmeijer Viktória Zsók

5 Organization CEFP 2007 was organized by the Faculty of Mathematics and Computer Science, Babeş-Bolyai University, Cluj-Napoca, Romania. Executive Committee Program Chair Organizing Chair Organizing Committee (Eötvös Loránd University, Hungary) (Babeş-Bolyai University, Romania) Zoltán Csörnyei (Eötvös Loránd University, Hungary) Zalán Bodó Lehel Csató Zsolt Minier Horia F. Pop (Babeş-Bolyai University, Romania) Program Committee Kevin Hammond Rinus Plasmeijer Horia F. Pop Viktória Zsók University of St. Andrews, UK Eötvös Loránd University, Hungary Radboud University Nijmegen, The Netherlands Babeş-Bolyai University, Romania Babeş-Bolyai University, Romania Eötvös Loránd University, Hungary Sponsoring Institutions The summer school was supported by the CEEPUS program (via the CEEPUS CII-HU-19 Network) and by the Faculty of Mathematics and Computer Science, Babeş-Bolyai University, Cluj-Napoca.

6 Table of Contents An Introduction to itasks: Defining Interactive Work Flows for the Web... 1 Rinus Plasmeijer, Peter Achten, and Pieter Koopman Proving Properties of Lazy Functional Programs with Sparkle Maarten de Mol, Marko van Eekelen, and Rinus Plasmeijer An Introduction to the Lambda Calculus Zoltán Csörnyei and Gergely Dévai Abstract λ-calculus Machines Werner E. Kluge Programming in Ωmega Tim Sheard and Nathan Linger A Tutorial on Object-Oriented Functional Programming Horia F. Pop Use Cases for Refactoring in Erlang Tamás Kozsik, Zoltán Csörnyei,, Roland Király, Róbert Kitlei, László Lövei, Tamás Nagy, Melinda Tóth, and Anikó Víg From Interpretation to Compilation Jan Martin Jansen, Pieter Koopman, and Rinus Plasmeijer Author Index