منابع مشابه
Subtyping with Union Types, Intersection Types and Recursive Types II
This paper is a follow-up on previous work by the author on subtyping with (set-theoretic) union, intersection and recursive types. Previously, it was shown how types may be encoded as regular tree expressions/set constraints. This gave rise to a sound and complete decision procedure for type inclusion. The result was, however, limited to a rather speciic type language. In the work reported on ...
متن کاملSubtyping with Union Types, Intersection Types and Recursive Types
This paper is a follow-up on previous work by the author on sub-typing with (set-theoretic) union, intersection and recursive types. Previously, it was shown how types may be encoded as regular tree expressions/set constraints. This gave rise to a sound and complete decision procedure for type inclusion. The result was, however, limited to a rather speciic type language. In the work reported on...
متن کاملSubtyping Recursive Types in Kernel Fun
The problem of defining and checking a subtype relation between recursive types was studied in [3] for a first order type system, but for second order systems, which combine subtyping and parametric polymorphism, only negative results are known [17]. This paper studies the problem of subtype checking for recursive types in system kernel Fun, a typed -calculus with subtyping and bounded second o...
متن کاملSubtyping Recursive Types Modulo Associative Commutative Products
We study subtyping of recursive types in the presence of associative and commutative products—that is, subtyping modulo a restricted form of type isomorphisms. We show that this relation, which we claim is useful in practice, is a composition of the usual subtyping relation with the recently proposed notion of equality up to associativity and commutativity of products, and we propose an efficie...
متن کاملSubtyping Object and Recursive Types Logically
Subtyping in first order object calculi is studied with respect to the logical semantics obtained by identifying terms that satisfy the same set of predicates, as formalized through an assignment system. It is shown that equality in the full first order ς-calculus is modelled by this notion, which on turn is included in a Morris style contextual equivalence.
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ژورنال
عنوان ژورنال: ACM Transactions on Programming Languages and Systems
سال: 1993
ISSN: 0164-0925,1558-4593
DOI: 10.1145/155183.155231