compdata: Compositional Data Types

[ benchmark, bsd3, generics, library ] [ Propose Tags ]
Versions 0.1, 0.2, 0.3, 0.4, 0.4.1, 0.5, 0.5.1, 0.5.2, 0.5.3, 0.6, 0.6.1,,,,, 0.7,,, 0.8,,,,,, 0.9, 0.10, 0.10.1, 0.11
Dependencies base (==4.*), containers, deepseq, derive, mtl, QuickCheck (>=2), template‑haskell, th‑expand‑syns, transformers [details]
License BSD-3-Clause
Author Patrick Bahr, Tom Hvitved
Category Generics
Source repo head: hg clone
Uploaded by PatrickBahr at Tue Nov 19 09:33:19 UTC 2013
Distributions NixOS:0.11
Downloads 10955 total (91 in the last 30 days)
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Status Docs available [build log]
Successful builds reported [all 1 reports]
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Based on Wouter Swierstra's Functional Pearl Data types a la carte (Journal of Functional Programming, 18(4):423-436, 2008,, this package provides a framework for defining recursive data types in a compositional manner. The fundamental idea of compositional data types (Workshop on Generic Programming, 83-94, 2011, is to separate the signature of a data type from the fixed point construction that produces its recursive structure. By allowing to compose and decompose signatures, compositional data types enable to combine data types in a flexible way. The key point of Wouter Swierstra's original work is to define functions on compositional data types in a compositional manner as well by leveraging Haskell's type class machinery.

Building on that foundation, this library provides additional extensions and (run-time) optimisations which make compositional data types usable for practical implementations. In particular, it provides an excellent framework for manipulating and analysing abstract syntax trees in a type-safe manner. Thus, it is perfectly suited for programming language implementations, especially, in an environment consisting of a family of tightly interwoven domain-specific languages.

In concrete terms, this package provides the following features:

Examples of using (generalised) (parametric) compositional data types are bundled with the package in the libray examples.




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