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Proceedings of the seventh ACM SIGPLAN international conference on Functional programming, 2002
Even when programming in a statically typed language we every now and then encounter statically untypable values; such values result from interpreting values or from communicating with the outside world. To cope with this problem most languages include some form of dynamic types. It may be that the core language has
Baars, A.I., Swierstra, S.D.
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Even when programming in a statically typed language we every now and then encounter statically untypable values; such values result from interpreting values or from communicating with the outside world. To cope with this problem most languages include some form of dynamic types. It may be that the core language has
Baars, A.I., Swierstra, S.D.
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Abstract types have existential types
Proceedings of the 12th ACM SIGACT-SIGPLAN symposium on Principles of programming languages - POPL '85, 1985Abstract data type declarations appear in typed programming languages like Ada, Alphard, CLU and ML. This form of declaration binds a list of identifiers to a type with associated operations, a composite “value” we call a data algebra . We use a second-order typed lambda calculus SOL to show how data algebras may be
John C. Mitchell, Gordon D. Plotkin
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Proceedings of the 20th ACM SIGPLAN-SIGACT symposium on Principles of programming languages - POPL '93, 1993
We study the type inference problem for a system with type classes as in the functional programming language Haskell. Type classes are an extension of ML-style polymorphism with overloading. We generalize Milner's work on polymorphism by introducing a separate context constraining the type variables in a typing judgement.
Tobias Nipkow, Christian Prehofer
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We study the type inference problem for a system with type classes as in the functional programming language Haskell. Type classes are an extension of ML-style polymorphism with overloading. We generalize Milner's work on polymorphism by introducing a separate context constraining the type variables in a typing judgement.
Tobias Nipkow, Christian Prehofer
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Journal of Hospital Infection, 1988
Knowing the type and subtype of viruses has often been an essential preliminary to good infection control. A wide variety of methods have been and are used to differentiate virus variants. Examples are given of how some of these biological, immunological and molecular techniques have been used to investigate the epidemiology of some common virus ...
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Knowing the type and subtype of viruses has often been an essential preliminary to good infection control. A wide variety of methods have been and are used to differentiate virus variants. Examples are given of how some of these biological, immunological and molecular techniques have been used to investigate the epidemiology of some common virus ...
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Typed equivalence, type assignment, and type containment
1991The study of models based on partial equivalence relations (per) and the analysis of the interpretation of inheritance that arises in these structures (Bruce&Longo[88]) leads us to reconsider the classical problem of type-assignment in this framework.
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