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Names For Free - Polymorphic Views of Names and Binders
-
- Bernardy, Jean-Philippe, 1978 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Pouillard, Nicolas, 1983 (author)
- IT-Universitetet i Kobenhavn,IT University of Copenhagen
- (creator_code:org_t)
- ISBN 9781450323833
- 2013-09-23
- 2013
- English.
- In: SIGPLAN Notices (ACM Special Interest Group on Programming Languages). - New York, NY, USA : ACM. - 0730-8566. - 9781450323833 ; 48:12, s. 13-24
- Conference paper (peer-reviewed)
Abstract
Subject headings
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- We propose a novel technique to represent names and binders inHaskell. The dynamic (run-time) representation is based on de Bruijnindices, but it features an interface to write and manipulatevariables conviently, using Haskell-level lambdas and variables. Thekey idea is to use rich types: a subterm with an additional free variableis viewed either as $\forall v. v \rightarrow \mathsf{Term} (a + v)$or $\exists v. v \times \mathsf{Term} (a + v)$ depending on weather itis constructed or analysed. We demonstrate on a number of exampleshow this approach approach permits to express terms construction and manipulation in a natural way, while retaining the good properties ofrepresentations based on de Bruijn indices.
Subject headings
- NATURVETENSKAP -- Data- och informationsvetenskap -- Datavetenskap (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences -- Computer Sciences (hsv//eng)
Keyword
- type-classes
- polymorphism
- name binding
- parametricity
- nested types
Publication and Content Type
- kon (subject category)
- ref (subject category)
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