DARTS.4.3.10.pdf
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KafKa: Gradual Typing for Objects (Artifact)
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Special Issue of the 32nd European Conference on Object-Oriented Programming (ECOOP 2018)
Volume: DARTS, Volume 4 (ECOOP 2018)
Conference: European Conference on Object-Oriented Programming (ECOOP)
Journal: Dagstuhl Artifacts Series (DARTS) - License:
Creative Commons Attribution 3.0 Germany license
- Publication Date: 2018-07-05
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Benjamin Chung, Paley Li, Francesco Zappa Nardelli, and Jan Vitek. KafKa: Gradual Typing for Objects (Artifact). In Special Issue of the 32nd European Conference on Object-Oriented Programming (ECOOP 2018). Dagstuhl Artifacts Series (DARTS), Volume 4, Issue 3, pp. 10:1-10:3, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)
https://doi.org/10.4230/DARTS.4.3.10
https://doi.org/10.4230/DARTS.4.3.10
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DARTS-4-3-10-artifact-5186a2242726e810f5acac714a827a6c.zip
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Abstract
A wide range of gradual type systems have been proposed, providing many
languages with the ability to mix typed and untyped code. However, hiding
under language details, these gradual type systems have fundamentally
different ideas of what it means to be typed. In this paper, we show that
four of the most common gradual type systems provide distinct guarantees,
and we give a formal framework for comparing gradual type systems for
object-oriented languages. First, we show that the different gradual type
systems are practically distinguishable via a three-part litmus test. Then,
we present a formal framework for defining and comparing gradual type
systems. Within this framework, different gradual type systems become
translations between a common source and target language, allowing for
direct comparison of semantics and guarantees.
Keywords
- Gradual typing
- object-orientation
- language design
- type systems
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References
- Timothy Jones and David J. Pearce. A mechanical soundness proof for subtyping over recursive types. In Proceedings of the 18th Workshop on Formal Techniques for Java-like Programs, FTfJP'16, pages 1:1-1:6, New York, NY, USA, 2016. ACM. URL: http://doi.acm.org/10.1145/2955811.2955812, URL: http://dx.doi.org/10.1145/2955811.2955812.