Peyton Jones, S. and Hughes, J. eds. Report on the Programming Language Haskell 98 { A Non-strict, Purely Functional Language, 1 February 1999.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....the inferred types are checked for consistency. There is a type checking algorithm known 5 j [ j arithmetic operator else e 2 j let x = e 1 in e 2 Figure 2.1: Abstract syntax of Exp . as the W algorithm [35] which is used in the language Standard ML [36] and Haskell [27] . 2.1.1 Hindley Milner type discipline We de ne a syntax and typing rules for a small language Exp, depicted in Figure 2.1. The language will be used to discuss the W algorithm, the M algorithm and two new inference algorithms: the UAE algorithm (Chapter 4) and the H algorithm (Chapter 6) ....

S.L. Peyton Jones and P. Wadler. Report on the programming language haskell98: A non-strict, purely functional language. Technical report, February 1999.

....for an analogous reason: both message or record field identifiers may be bound to varying values depending on the execution. Neither first class messages nor first class record fields are not supported in statically typed languages such as Standard ML [20] Objective Caml [35] or Haskell [30]. There is a type system for extensible records with first class record fields by Gaster [14] but it is restrictive in not allowing a single record field type to mention varying record fields. Recently, the second author has proposed an extension to the ML type system that can deal with ....

S. Peyton Jones, J. Hughes, L. Augustsson, D. Barton, B. Boutel, W. Burton, J. Fasel, K. Hammond, R. Hinze, P. Hudak, T. Johnsson, M. Jones, J. Launchbury, E. Meijer, J. Peterson, A. Reid, C. Runciman, and P. Wadler. Report on the programming language Haskell 98: A non-strict, purely functional language. Technical report, Feb. 1999. Available at http://www.haskell.org/definition/.

....model for constructing interactive applications. FRP programs are described in terms of behaviors (continuous, time varying, reactive values) and events (conditions that occur at discrete points in time) All previous implementations of FRP have been embedded in the Haskell programming language [15]. As discussed in [10] Haskell s lazy evaluation, rich type system, and higher order functions make it an excellent basis for development of new domain speci c languages and new programming paradigms such as FRP. In the Java community, recent work has produced the Java Beans component model ....

S. Peyton-Jones and J. H. (eds.). Report on the Programming Language Haskell 98: A non-strict, purely functional language. Technical Report YaleU/DCS/RR-1106, Dept. of Computer Science, Yale University, 1999.

....(e.g. uni cation, substitution generation, etc. as uninterpreted atomic actions. The logical connectives are modelled by appropriate operators on processes. Instead of using mathematical notation for the de nition of the denotational semantics, we use the functional programming language Haskell [22]. In this way, we allow our denotational semantics to be directly implementable, in the form of an interpreter for the languages under study, and thus to be easily tested and evaluated. At the same time, we avoid unnecessary complexities accompanying the use of domain theory or the theory of ....

S. Peyton Jones and J. H. (editors). Report on the programming language Haskell 98: a non-strict purely functional language, 1999. Available from http://haskell.org/.

....of Timber s main contributions: the way that time is integrated into the language. May of the features of Timber have been adopted from the reactive object oriented concurrent functional language O Haskell [15] which was in turn defined as an extension to the purely functional language Haskell [12]. However, the Haskellian ancestry of Timber should not cause it to be ignored by the wider (non functional) programming language community. Indeed, Timber attempts to combine the best features of three different programming paradigms. Timber is an imperative object oriented language, offering ....

....Section 6. Reactive objects, concurrency, and encapsulated state are discussed in Section 5. Section 7 presents some additional syntactic features of Timber, before the paper ends with an example of Timber programming (Section 8) The grammar of Timber appears in the Appendix. 1. Haskell Haskell [1, 12] is a lazy, purely functional language, and the base upon which Timber is built. Readers familiar with Haskell may wish to skip this section; it introduces no new material, and is present to make this paper accessible to those who have not previously met the language, or who need a reminder of its ....

Simon Peyton Jones, John Hughes, Lennart Augustsson, et al., Report on the Programming Language Haskell 98: A Non-strict, Purely Functional Language. , , 1999. http:// www.haskell.org

....In Clean the uniqueness type system is used to support I O in an explicit multiple environment passing style. Two other styles of solutions have been proposed to handle I O in a purely functional setting: stream based and monad based [24, 17] The standard functional programming language Haskell [14, 19] initially adopted a stream based solution up to version 1.2. From version 1.3 on monads were rmly integrated in the language. Many interesting experimental frameworks have been proposed to handle GUI programming in both styles ( 9, 15, 21, 23] to name a few) For a broad overview see Section 7. ....

Peyton Jones, S. and Hughes, J. eds. Report on the Programming Language Haskell 98 { A Non-strict, Purely Functional Language, 1 February 1999.

....consise term is world as value) Clean uses its uniqueness type system for explicit multiple environment passing. In the functional world two other styles of solutions have been proposed to handle I O: stream based and monad based [22, 15] The standard functional programming language Haskell [12, 17] initially adopted a stream based solution up to version 1.2. From version 1.3 on monads have been rmly integrated in the language. In this paper we report on a project (that is at this stage still in progress ) in which we investigate how to port the Clean Object I O system to Haskell. There ....

Peyton Jones, S. and Hughes, J. eds. Report on the Programming Language Haskell 98 { A Non-strict, Purely Functional Language, 1 February 1999.

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Peyton Jones, S. and Hughes, J. eds. Report on the Programming Language Haskell 98 { A Non-strict, Purely Functional Language, 1 February 1999.

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