By Dave Clarke, James Noble, Tobias Wrigstad
This e-book offers a survey of the state of the art on options 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 via 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 prepared in topical sections at the Geneva conference, possession, concurrency, alias research, controlling results, verification, programming languages, and visions.
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Extra resources for Aliasing in Object-Oriented Programming: Types, Analysis, and Verification
This mechanism allows both the creation of representation objects external to the intended owning object, as well as returning temporary references to internal objects. Although this mechanism temporarily relaxes the topological restriction, it could be used safely to implement iterators that could access a list’s links, without allowing the iterator to escape the dynamic scope in which it is deﬁned. In any case, one can view this as a mechanism vs. policy issue. Such owners provide a mechanism for temporarily violating the protection, but it can only be used if the interface of the class exposes methods/ﬁelds with this in their type.
Applied this technique to conﬁnement , ownership , and ownership and immutability combined . Jo∃ [32,30] adds existential types on top of a generic Ownership Type system. Ownership information is passed as additional type parameters and existential quantiﬁcation allows owners to vary. C[o|o]: the latter expresses a relationship between the two Ownership Types: A Survey 33 owner parameters, even though they are unknown. A variant Jo∃deep enforces the owners-as-dominators policy. Dietl, Drosspoloulou and Müller [53,60] extended Universes to include generics.
As owners-as-dominators requires that all owner parameters are outside the owner of an object, allowing transfer of objects outwards in the hierarchy would result in a violation of this invariant. In his Alias Burying proposal, Boyland  showed that destructive reads are not necessary for the preservation of uniqueness. Instead, it is suﬃcient to ensure that any aliases to a unique value are destroyed, for example, when a method exits, and thus preserve uniqueness. Checking that this is the case requires sophisticated static analysis.
Aliasing in Object-Oriented Programming: Types, Analysis, and Verification by Dave Clarke, James Noble, Tobias Wrigstad