Understanding Haskell-style Overloading via Open Data and Open Functions

Fuente: arXiv
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Autores principales: Marmaduke, Andrew, Ingle, Apoorv, Morris, J. Garrett
Formato: Preprint
Publicado: 2025
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author Marmaduke, Andrew
Ingle, Apoorv
Morris, J. Garrett
author_facet Marmaduke, Andrew
Ingle, Apoorv
Morris, J. Garrett
contents We present a new, uniform semantics for Haskell-style overloading. We realize our approach in a new core language, System F$_\mathrm{D}$, whose metatheory we mechanize in the Lean4 interactive theorem prover. System F$_\mathrm{D}$ is distinguished by its open data types and open functions, each given by a collection of instances rather than by a single definition. We show that System F$_\mathrm{D}$ can encode advanced features of Haskell's of type class systems, more expressively than current semantics of these features, and without assuming additional type equality axioms.
format Preprint
id arxiv_https___arxiv_org_abs_2507_16086
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Understanding Haskell-style Overloading via Open Data and Open Functions
Marmaduke, Andrew
Ingle, Apoorv
Morris, J. Garrett
Programming Languages
We present a new, uniform semantics for Haskell-style overloading. We realize our approach in a new core language, System F$_\mathrm{D}$, whose metatheory we mechanize in the Lean4 interactive theorem prover. System F$_\mathrm{D}$ is distinguished by its open data types and open functions, each given by a collection of instances rather than by a single definition. We show that System F$_\mathrm{D}$ can encode advanced features of Haskell's of type class systems, more expressively than current semantics of these features, and without assuming additional type equality axioms.
title Understanding Haskell-style Overloading via Open Data and Open Functions
topic Programming Languages
url https://arxiv.org/abs/2507.16086