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An Implementation of Subtyping Among Regular Expression Types

  • Kenny Zhuo Ming Lu
  • Martin Sulzmann
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3302)

Abstract

We introduce a novel implementation of subtyping among regular expression types in terms of Haskell-style type classes by making use of some modest type class extensions. We assume that each regular expression type has some underlying structured runtime representation. Hence, we not only check for the containment problem among regular expressions, but also automatically derive some appropriate casting functions among the underlying structured values. We believe that this work is the first step in adding type-safe XML support to languages such as Haskell.

Keywords

Regular Expression Type Class Proof System Type Check Proof Rule 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Kenny Zhuo Ming Lu
    • 1
  • Martin Sulzmann
    • 1
  1. 1.School of ComputingNational University of SingaporeSingapore

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