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Subtyping in alloy

Author(s)
Torlak, Emina, 1979-
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Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
Advisor
Daniel N. Jackson.
Terms of use
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582
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Abstract
A type system for the Alloy modelling language is described that supports subtypes and allows overloading of relation names. No special syntactic features needed to be added to the language to support the type system; there are no casts, and the meaning of a model can be understood without reference to types. Type errors are associated with expressions that are irrelevant, in the sense that they can be replaced by an empty relation without affecting the value of their enclosing formula. Relevance is computed with an abstract interpretation that is relatively insensitive to standard algebraic manipulations. The typechecker for the system is presented in the context of Alloy Analyzer 3.0. Its architecture is explained in terms of key data abstractions, algorithms, and complexity analyses.
Description
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.
 
Includes bibliographical references (p. 59-60).
 
Date issued
2004
URI
http://hdl.handle.net/1721.1/18012
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Publisher
Massachusetts Institute of Technology
Keywords
Electrical Engineering and Computer Science.

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