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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Dependencies base (>=4.7 && <4.15), containers, ghc-prim, vector [details]
License MIT
Copyright 2017 Li-yao Xia
Author Li-yao Xia
Maintainer lysxia@gmail.com
Revised Revision 1 made by lyxia at 2022-01-05T15:39:16Z
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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 2019-01-03T12:20:20Z
Distributions LTSHaskell:, NixOS:, Stackage:
Downloads 3635 total (54 in the last 30 days)
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Status Hackage Matrix CI
Docs available [build log]
Last success reported on 2019-01-03 [all 1 reports]


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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); Supports arbitrary, user-defined mappings between keys and types of values via defunctionalization.

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

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.