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oai:drops-oai.dagstuhl.de:9217 2024-03-06T10:43:38Z ddc:004 open_access

KafKa: Gradual Typing for Objects Chung, Benjamin Li, Paley Zappa Nardelli, Francesco Vitek, Jan Gradual typing object-orientation language design type systems 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 embody fundamentally different ideas of what it means to be well-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. 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. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Benjamin Chung and Paley Li and Francesco Zappa Nardelli and Jan Vitek 2018 Is Part Of LIPIcs, Volume 109, 32nd European Conference on Object-Oriented Programming (ECOOP 2018) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/LIPIcs.ECOOP.2018.12 urn:nbn:de:0030-drops-92170 https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ECOOP.2018.12 eng https://creativecommons.org/licenses/by/3.0/legalcode