Parametric Subtyping for Structural Parametric Polymorphism-Reference-Cited by-同舟云学术

Parametric Subtyping for Structural Parametric Polymorphism

Published:2024-01-05 Issue:POPL Volume:8 Page:2700-2730
ISSN:2475-1421
Container-title:Proceedings of the ACM on Programming Languages
language:en
Short-container-title:Proc. ACM Program. Lang.

Author:

DeYoung Henry¹^ORCID,Mordido Andreia²^ORCID,Pfenning Frank¹^ORCID,Das Ankush³^ORCID

Affiliation:

1. Carnegie Mellon University, Pittsburgh, USA

2. Universidade de Lisboa, Lisbon, Portugal

3. Amazon, Santa Clara, USA

Abstract

We study the interaction of structural subtyping with parametric polymorphism and recursively defined type constructors. Although structural subtyping is undecidable in this setting, we describe a notion of parametricity for type constructors and then exploit it to define parametric subtyping , a conceptually simple, decidable, and expressive fragment of structural subtyping that strictly generalizes rigid subtyping . We present and prove correct an effective saturation-based decision procedure for parametric subtyping, demonstrating its applicability using a variety of examples. We also provide an implementation of this decision procedure as an artifact.

Funder

Fundação para a Ciência e a Tecnologia

Publisher

Association for Computing Machinery (ACM)

Link

https://dl.acm.org/doi/pdf/10.1145/3632932

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1. Parametric Subtyping for Structural Parametric Polymorphism;Proceedings of the ACM on Programming Languages;2024-01-05