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Tracking Linear and Affine Resources with Java(X)

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Book cover ECOOP 2007 – Object-Oriented Programming (ECOOP 2007)

Part of the book series: Lecture Notes in Computer Science ((LNPSE,volume 4609))

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Abstract

Java(X) is a framework for type refinement. It extends Java’s type language with annotations drawn from an algebra X and structural subtyping in terms of the annotations. Each instantiation of X yields a different refinement type system with guaranteed soundness. The paper presents some applications, formalizes a core language, states a generic type soundness result, and sketches the extensions required for the full Java language (without generics).

The main technical innovation of Java(X) is its concept of activity annotations paired with the notion of droppability. An activity annotation is a capability which can grant exclusive write permission for a field in an object and thus facilitates a typestate change (strong update). Propagation of capabilities is either linear or affine (if they are droppable). Thus, Java(X) can perform protocol checking as well as refinement typing. Aliasing is addressed with a novel splitting relation on types.

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Authors and Affiliations

  1. Institut für Informatik, Universität Freiburg,  

    Markus Degen, Peter Thiemann & Stefan Wehr

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  1. Markus Degen
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  2. Peter Thiemann
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  3. Stefan Wehr
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Erik Ernst

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Degen, M., Thiemann, P., Wehr, S. (2007). Tracking Linear and Affine Resources with Java(X) . In: Ernst, E. (eds) ECOOP 2007 – Object-Oriented Programming. ECOOP 2007. Lecture Notes in Computer Science, vol 4609. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73589-2_26

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  • DOI: https://doi.org/10.1007/978-3-540-73589-2_26

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-73588-5

  • Online ISBN: 978-3-540-73589-2

  • eBook Packages: Computer ScienceComputer Science (R0)

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