Document Type

Conference Proceeding

Publication Title

Proceedings of the 41st ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages

Version

Author's Final Manuscript

Publication Date

2014

Abstract

Open, type-level functions are a recent innovation in Haskell that move Haskell towards the expressiveness of dependent types, while retaining the look and feel of a practical programming language. This paper shows how to increase expressiveness still further, by adding closed type functions whose equations may overlap, and may have non-linear patterns over an open type universe. Although practically useful and simple to implement, these features go beyond conventional dependent type theory in some respects, and have a subtle metatheory.

DOI

https://doi.org/10.1145/2535838.2535856

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