2 0 obj /Length 586 In this talk, I Stephanie Weirich is a Professor of Computer and Information Science at the University of Pennsylvania. CITES METHODS & BACKGROUND. endobj (2018). Stephanie Weirich is a Professor of Computer and Information Science at the The Haskell 2010 report was published in July 2010, and is the current definition of the Haskell language. Her awards include the 2016 Most Influential ICFP Packages tagged dependent-types. Dependent Types in Haskell Ningning Xie 1 13 Dec., 2018 Hong Kong Functional Programming Meetup 1The University of Hong Kong 17. Part 2 showed the simple way we can extend our Haskell types to make them sum types! types and roles. In this work, we show how to integrate roles with dependent type systems and prove, using the Coq proof assistant, … types and roles. HIGHLY INFLUENCED. an extended example of a Haskell library for regular expression matching. [2017]. Haskell, as implemented in the Glasgow Haskell Compiler (GHC), has been adding new type-level programming features for some time. (bsd3, data, dependent-types, library) 2019-06-19: phadej: decidable: 16: 0.0: Combinators for manipulating dependently-typed predicates. singletons. To see how Illative Combinatory logic deals with dependent types, see combinator G described in Systems of Illative Combinatory Logic complete for first-order propositional and predicate calculus by Henk Barendregt, Martin Bunder, Wil Dekkers.It seems to me that the dependent type constructof Epigr… The starting point for our design is System D, the core language for Dependent Haskell from Weirich et al. In part 1 we reviewed the basic way to construct data types in Haskell. Data 2. For example, in the hypothetical dependent Haskell, the function to produce a list with n copies of a given value could have the following signature type systems, machine-assisted theorem proving and dependent the process, I will use this example to analyze what it means for a practical 50 packages have this tag. )Instead of writing a long response inline in Reddit, it seems best to address the (very knowledgeable, respectful, and all around heartening) debate here. (bsd3, data, dependent-types, library) 2019-06-19: phadej: decidable: 15: 0.0: Combinators for manipulating dependently-typed predicates. Haskell' is the next official version. We’re back to continue on our journey in using dependent types to write type-safe neural networks! Packages tagged dependent-types. 2017]. << Visible dependent quantification in Haskell. Stephanie Weihrich, Dependent Types in Haskell WHY SHOULD PROGRAMMERS CARE ABOUT DEPENDENT TYPES? A Speci cation for Dependent Types in Haskell. Cornell University in 2002. She works in the areas of functional programming, type systems, machine-assisted theorem proving and dependent types. Here is the schedule as I see it: GHC 8.2: Clean up some of the lingering issues with -XTypeInType. Dependent Types Type More Tags Click on a tag to add it and filter down. More likely 8.6 or 8.8 (2019-20). A dependent type does depend on such dynamic values. type-equality. (This is … [2017]. the 2009 Haskell Symposium. To make sure such conversions are safe and desirable, this feature relies on a mechanism of roles to prohibit invalid coercions. ... compare types of any kinds in haskell (bsd3, dependent-types, library) 2015-01-10: Kinokkory: cubical: ... Decidable propositions. Haskell's kind-of-dependent-types extensions are great for elegantly expressing things that once upon a time would rely on sophisticated phantom types and crazy type class magic, but actually dependently-typed programming is not really the same thing. We compared this to the syntax of other langauges like Java and Python. Agda. Ningning Xie and Richard A Eisenberg. PACMPL (ICFP) seeks contributions on the design, implementations, principles, and uses of functional programming, covering the entire spectrum of work, from practice to theory, including its peripheries. Though this language has full-spectrum dependent types, it is not a standard dependent type theory: it admits logical inconsistency and the ⋆ : ⋆axiom, along with support for equality assumptions and type erasure. [2017]. Tue 20 Aug 2019 15:20 - 15:43 at Aurora Borealis - Dependent Types in Haskell Chair(s): Joachim Breitner Abstract Recent versions of the Haskell compiler GHC have a number of advanced features that allow many idioms from dependently typed programming to be encoded. Haskell in which types are assigned run-time representatives (called singletons, because each has but a single non-⊥ inhabitant) that contain witnesses of type equality from which the represented type can be recovered. 9.7 5.0 Haskell A framework for generating singleton types. Many of these features---chiefly: generalized algebraic datatypes (GADTs), type families, kind polymorphism, and promoted datatypes---have brought Haskell to the doorstep of dependent types. endstream xÚmTËâ0¼ç+¼$æÀà$0 ãö Haskell / ˈ h æ s k əl / is a general-purpose, statically typed, purely functional programming language with type inference and lazy evaluation. a#A%áÀ߯«ÀÌjDÕå²»«ífðãc;ZæÕÁÌ«¶®MfGÑÏ}í q]/¶ìÞÍmÞ¯¶o⣩²íÄ0ZÇë²è^x]fçkn{ÕÿE+{*ʧyÄpg6;5PìîìV¤pH8$hùmÚ¢*ßzR:")ó¨º ÊÖß3qûXysO'Hî)-ò"ëî}³³ÍÛ[ÛÙ˺. haskell dependent-types midi music-composition haskell-library music-notation type-level-programming Updated Mar 3, 2019; Haskell; cedille / cedille Star 278 Code Issues Pull requests Open Allow import M as _ ... Add a description, image, and links to the dependent-types topic page so that developers can more easily learn about it. The code could have been python if you squinted, passing dictionaries around, no type annotations anywhere. Showing projects tagged as Dependent Types and Type. Coercion Quanti cation. In lieu of video, I decided to write this blog post so that I could share it with others. will motivate this work and demonstrate the benefits of these features through Type packages. Download Citation | A specification for dependent types in Haskell | We propose a core semantics for Dependent Haskell, an extension of Haskell with full-spectrum dependent types. The starting point for our design is System D, the core language for Dependent Haskell fromWeirich et al. She works in the areas of functional programming, Over the past decade, the Haskell compiler GHC has incorporated a number of new type system features inspired by dependent type theory. /Filter /FlateDecode haskell dependent ... Add a description, image, and links to the dependent-types topic page so that developers can more easily learn about it. programming language to be “dependently typed.”. Dr. Weirich has served as the program chair of POPL 2019, ICFP 2010 and the 2009 Haskell Symposium. Dependent types in Haskell will be inconsistent, when we view Haskell as a logic. Updated Mar 3, 2019; Haskell; metastatedev / juvix Star 153 Code Issues Pull requests A more elegant language for a more civilized age. Our extension brings the expressive power of Haskell’s type language closer to the term language, and takes another important step towards bringing full-spectrum dependent types to Haskell [Weirich et al.2017]. Developed to be suitable for teaching, research and industrial application, Haskell has pioneered a number of advanced programming language features such as type classes, which enable type-safe operator overloading. We make the following speciic contributions: • The type-level programming landscape has evolved greatly since the early days of Haskell Posts about Haskell written by Richard Eisenberg. Haskell Dependent Types Type packages « All Tags Selected Tags Click on a tag to remove it. In Dependent Types in Haskell with Stephanie Weirich At Strange Loop 2017, I wandered into a talk where I saw some code that deeply surprised me. Mar 15, 2019 This post is based off of a talk I gave on March 8, 2019, that was unfortunately not recorded. Dependent types will still remain type-safe however. Over the past decade, the Haskell compiler GHC has incorporated a number of Though this language has full-spectrum dependent types, it is not a standard dependent type theory: it admits logical inconsistency and the⋆: ⋆axiom, along with support for equality assumptions and type erasure. 50 packages have this tag. The starting point for our design is System D, the core language for Dependent Haskell fromWeirich et al. (Thanks for the heads up, @thomie! Paper award (for 2006) and the 2016 ACM SIGPLAN Robin Milner Young Researcher ... compare types of any kinds in haskell (bsd3, dependent-types, library) 2015-01-10: Kinokkory: cubical: ... Decidable propositions. Modern Haskell supports zero-cost coercions, a mechanism where types that share the same run-time representation may be freely converted between. parameterized-utilsdoesn’t use Eisenberg and Weirich’s library, nor the 2018. Compilers will also continue to support the previous version of Haskell, Haskell 98 (via a special flag). What is a dependent type An ordinary type such as [a] may depend on other types -- in our case, the type of list elements -- but not on the values of those elements or their number. Functional Programming Language with Dependent Types. DEPENDENT TYPES IN HASKELL: THEORY AND PRACTICE RichardA.Eisenberg ADISSERTATION in ComputerandInformationSciences ... code, a full description of the differences between Dependent Haskell and today’s Haskell,anoveldependentlytypedlambda-calculus(calledPico)suitableforuseas To make sure such conversions are safe and desirable, this feature relies on a mechanism of roles to prohibit invalid coercions. Dr. Weirich has served as the program chair of POPL 2019, ICFP 2010 and Talk: (English) Dependent Types in Haskell Why should programmers care about dependent types? She works in the areas of functional programming, type systems, machine-assisted theorem proving and dependent types. 50 packages have this tag. so that we can, for the first time, perform higher-order programming at the type level in Haskell. Packages tagged dependent-types. (bsd3, data, dependent-types, library) 2019-06-19: phadej: decidable: 9: 0.0: Combinators for manipulating dependently-typed predicates. Type inference, Haskell and dependent types @inproceedings{Gundry2013TypeIH, title={Type inference, Haskell and dependent types}, author={Adam Michael Gundry}, year={2013} } Adam Michael Gundry ... 2019; VIEW 5 EXCERPTS. University of Pennsylvania. stream types. Award. Proceedings of the ACM on Programming Languages 1, ICFP (2017), 31. new type system features inspired by dependent type theory. Many dependently typed programs can even currently be encoded, but … Dr. Weirich has served as the program chair of POPL 2019, ICFP 2010 and the 2009 Haskell Symposium. Though this language has full-spectrum dependent types, it is not a standard dependent type theory: it admits logical inconsistency and the ⋆ : ⋆axiom, along with support for equality assumptions and type erasure. >> It covers such topics as dependent types (including path dependent types), type families, sum and product types, functions, dependent Σ- and Π-type, inductive types, identity type, type classes, eliminators (recursion and induction), β-reduction, η-conversion, Curry–Howard isomorphism, programming at type level. Summer 2019 2019 2018 2017 2016 2015.
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