type-map: Type-indexed maps

[ data, library, mit ] [ Propose Tags ]

Maps where keys are types and values can have types depending on their keys.

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Versions [faq],,,,,,
Change log CHANGELOG.md
Dependencies base (>=4.7 && <5), containers, ghc-prim, vector [details]
License MIT
Copyright 2017 Li-yao Xia
Author Li-yao Xia
Maintainer lysxia@gmail.com
Category Data
Home page https://github.com/Lysxia/type-map
Bug tracker https://github.com/Lysxia/type-map/issues
Source repo head: git clone https://github.com/Lysxia/type-map
Uploaded by lyxia at Thu Dec 20 15:13:57 UTC 2018
Distributions NixOS:, Stackage:
Downloads 1338 total (113 in the last 30 days)
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Status Hackage Matrix CI
Docs available [build log]
Last success reported on 2018-12-20 [all 1 reports]


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For package maintainers and hackage trustees

Readme for type-map-

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Type-indexed maps Hackage Build Status

Maps whose keys are types.

This package includes:

  • a dynamic type map using GHC's Typeable class, with a Proxy-based API (Data.TypeMap.Dynamic) or a TypeApplications-based API (Data.TypeMap.Dynamic.Alt);

  • a static type map, whose type is indexed by its list of keys (there are actually multiple implementations with different underlying representations ([], Map, Vector)).

Both variants support arbitrary, user-defined mappings between types and values, via defunctionalization.

Example using the dynamically-typed interface.

See also this package's description on Hackage.


Internal module policy

Modules under Data.TypeMap.Internal are not subject to any versioning policy. Breaking changes may apply to them at any time.

If something in those modules seems useful, please report it or create a pull request to export it from an external module.