Trends in Functional Programming: 15th International by Jurriaan Hage, Jay McCarthy

By Jurriaan Hage, Jay McCarthy

This booklet constitutes the completely refereed revised chosen papers of the fifteenth foreign Symposium on tendencies in useful Programming, TFP 2014, held in Soesterberg, The Netherlands, in might 2014. The eight revised complete papers integrated during this quantity have been conscientiously and chosen from 22 submissions. TFP is a global discussion board for researchers with pursuits in all facets of practical programming, taking a vast view of present and destiny developments within the area.

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Extra resources for Trends in Functional Programming: 15th International Symposium, TFP 2014, Soesterberg, The Netherlands, May 26-28, 2014. Revised Selected Papers

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Inspired by McBride [14], the present implementation allows the result type of an effectful operation to depend on run-time information, with compile-time checks enforced by the type system ensuring that any necessary run-time checks are made. The effect transitions given in function types are reminiscent of Hoare triples, describing preconditions and postconditions on operations. One previous implementation of this idea using dependent types is YNot [15], an axiomatic extension to Coq. While each of these approaches is similar in expressivity, the implementation described in this paper allows finegrained control over allowed effects, as well as composition of effects.

Like Call Arity, it can only determine arities of let-bound expressions and will not make any use of arity information on parameters. A backward arity analysis capable of doing this is also described in [13]. This analysis calculates the arity transformer of a function f: a mapping from the number of arguments f is called with to the number of arguments passed to f’s parameters. It is not implemented in GHC as such, but subsumed by the new combined strictness/demand/cardinality analyzer. The latest description of this analyzer can be found in [10].

1539 3. : Idris, a general-purpose dependently typed programming language: Design and implementation. Journal of Functional Programming 23, 552–593 (2013) 4. : Programming and reasoning with algebraic effects and dependent types. In: ICFP 2013: Proceedings of the 18th ACM SIGPLAN International Conference on Functional Programming. ACM (2013) 5. : Correct-by-construction concurrency: Using dependent types to verify implementations of effectful resource usage protocols. Fundamenta Informaticae 102, 145–176 (2010) 6.

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