open-adt: Open algebraic data types.

This is a package candidate release! Here you can preview how this package release will appear once published to the main package index (which can be accomplished via the 'maintain' link below). Please note that once a package has been published to the main package index it cannot be undone! Please consult the package uploading documentation for more information.

[maintain]

This library, built upon row-types, provides types and functions for variants of various functors that all have the same type applied to them. This is very similar to, and inspired by, haskus-utils-variant. At the time of writing, the compile-time performance of haskus-utils-variant is poor for variants with many fields, which should be improved in this package by using row-types.

The main types of interest in this package are VarF and OpenADT. VarF wraps a variant of functors, all over the same type, and provides a functor instance that fmaps over whatever the variant is. OpenADT is the fixed-point type of VarF, which allows for recursive structures to be created.

A convenience function, mkVarPattern from Data.OpenADT.TH, generates patterns that can be used as constructors for variants. The key aspect of these patterns is that they are polymorphic in the type of the row, allowing them to be used as constructors for any open algebraic data type that includes a particular constructor.

For examples, see the Data.OpenADT.Tutorial module.

Properties

Versions1.0, 1.0
Change logNone available
Dependenciesbase (>=4.9 && <5), constraints (>=0.8 && <1), recursion-schemes (==5.*), row-types (>=0.2.3 && <1), template-haskell (>=2.12 && <3) [details]
LicenseBSD-3-Clause
CopyrightCopyright (c) 2018 Jordan Woehr
MaintainerJordan Woehr
CategoryData
Home pagehttps://github.com/woehr/open-adt
Bug trackerhttps://github.com/woehr/open-adt/issues
Source repositoryhead: git clone https://github.com/woehr/open-adt
UploadedSun Nov 25 18:22:50 UTC 2018 by Woehr

Modules

[Index]

Downloads

Maintainers' corner

For package maintainers and hackage trustees