Modular generic programming with extensible superclasses

Martin Sulzmann, Meng Wang

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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"Generics for the Masses" (GM) and "Scrap your Boilerplate" (SYB) are generic programming approaches based on some inenious applications of Haskell type classes. To achieve modularity, the GM and SYB approach have been extended by using some experimental language extensions such as abstraction over type classes and recursive instances. Hence, the type class encodings behind the GM and SYB approach become less practical and harder to understand.We show that none of these type class features are necessary if we use the single feature of extensible superclasses, the complement of subclass extension. We formalize type classes with extensible superclasses as the combination of a previously introduced type-passing translation scheme and a general type class framework. Our results shed some new light on the use of type classes to support generic programming.
Original languageEnglish
Title of host publicationWGP '06 Proceedings of the 2006 ACM SIGPLAN workshop on Generic programming
PublisherAssociation for Computing Machinery (ACM)
Number of pages11
Publication statusPublished - 16 Sep 2016

Structured keywords

  • Programming Languages


  • generic programming
  • type classes

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