Lecture Notes in Computer Science 5161

(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

(2)

Zoltán Horváth Rinus Plasmeijer

Anna Soós Viktória Zsók (Eds.)

Central European

Functional Programming

School

Second Summer School, CEFP 2007

Cluj-Napoca, Romania, June 23-30, 2007

Revised Selected Lectures

(3)

Volume Editors Zoltán Horváth Viktória Zsók

Eötvös Loránd University, Faculty of Informatics 1117 Budapest, Hungary

E-mail: {hz, zsv}@inf.elte.hu Rinus Plasmeijer

University of Nijmegen, Faculty of Science 6500 GL Nijmegen, The Netherlands E-mail: rinus@cs.ru.nl

Anna Soós

Babe¸s-Bolyai University 400084 Cluj-Napoca, Romania E-mail: asoos@math.ubbcluj.ro

Library of Congress Control Number: 2008935561

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 0302-9743

ISBN-10 3-540-88058-5 Springer Berlin Heidelberg New York ISBN-13 978-3-540-88058-5 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

Typesetting: Camera-ready by author, data conversion by Scientiﬁc Publishing Services, Chennai, India Printed on acid-free paper SPIN: 12525737 06/3180 5 4 3 2 1 0

(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 Babe¸s-Bolyai University, Cluj-Napoca, Romania.

The summer school was organized in the spirit of the advanced program-ming 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 ab-stract lambda calculus machines, programming inΩmega, object-oriented func-tional 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 Com-mittee and the Organizing ComCom-mittee.

The web page for the summer school can be found at http://cs.ubbcluj.ro/ cefp2007/.

June 2008 Zoltán Horváth Rinus Plasmeijer Anna Soós Viktória Zsók

(5)

Organization

CEFP 2007 was organized by the Faculty of Mathematics and Computer Science, Babe¸s-Bolyai University, Cluj-Napoca, Romania.

Executive Committee

Program Chair Zolt´an Horv´ath

(Eötvös Loránd University, Hungary) Organizing Chair Anna Soós

(Babe¸s-Bolyai University, Romania) Organizing Committee Zolt´an Cs¨ornyei

(Eötvös Loránd University, Hungary) Zalán Bodó

Lehel Csat´o Zsolt Minier Horia F. Pop

(Babe¸s-Bolyai University, Romania)

Program Committee

Kevin Hammond University of St. Andrews, UK Zoltán Horváth Eötvös Loránd University, Hungary

Rinus Plasmeijer Radboud University Nijmegen, The Netherlands Horia F. Pop Babe¸s-Bolyai University, Romania

Anna Soós Babe¸s-Bolyai University, Romania Viktória Zsók 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, Babe¸s-Bolyai University, Cluj-Napoca.

(6)

Lecture Notes in Computer Science 5161