By Dave Clarke, James Noble, Tobias Wrigstad
This e-book offers a survey of the cutting-edge on strategies for facing aliasing in object-oriented programming. It marks the 20 th anniversary of the paper The Geneva conference at the remedy of item Aliasing by means of John Hogg, Doug Lea, Alan Wills, Dennis de Champeaux and Richard Holt. The 22 revised papers have been rigorously reviewed to make sure the top quality.The contributions are geared up in topical sections at the Geneva conference, possession, concurrency, alias research, controlling results, verification, programming languages, and visions.
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Additional info for Aliasing in Object-Oriented Programming: Types, Analysis, and Verification
Ownership has been used both via typing or by encoding the desired invariants into speciﬁcations. Notions of ownership have been incorporated into speciﬁcation languages JML , and Spec# . Banerjee and Naumann use ownership to show representation independence properties of classes [11,16,15], which enables one implementation of a class to be replaced by another. Ownership is used to indicate which classes are hidden behind the abstraction boundary. Their work has addressed this problem for increasingly sophisticated program models and relaxed restrictions.
B is outside a, or 4. a is owned by the aggregate owner b. The owners-as-ombudsmen topological invariant can be understood as a simpliﬁcation of Mojojojo, without requiring the eﬀects system. Using owners-as-ombudsmen, iterators can be expressed in a way that makes the List’s Links part of an aggregate deﬁned by the List and its Iterator objects. iterator(); // note bridge -> owner The type Iterator[bridge,owner] captures the fact that the i variable points to another bridge object of the shared aggregate.
This model keeps the public and private domains of the Ownership Domains model, though it hard codes a single private and single public domain per object, whereas Ownership Domains allows multiple public and multiple private domains per object. In addition, Simple Loose Ownership Domains omit link and domain declarations to reduce the syntactic overhead at the cost of a loss of the ability to express ﬁne structure. Each object has a boundary domain which stores objects that are both publicly accessible and can access private objects.