named-sop: Dependently-typed sums and products, tagged by field name

[ data, library, mit ] [ Propose Tags ]

Sums and Maps (products) indexed by a typelevel map of their field (or constructor) names and types. They can be combined and split again; their typelevel map is sorted to ensure that the end result is independent of the order you combine it in.

Data.NamedSOP.Generic contains functions for automatically converting between types with a Generic instance and named sums of products:

>>> data A = C { a :: Int, b :: Bool }
>>>          | D Int Bool deriving (Generic)
>>> :t genSum (C 3 True)
NSum
 '[ "_C" ':-> NMap '[ "a" ':-> Int, "b" ':-> Bool],
    "_D" ':-> NMap '[ "_1" ':-> Int, "_2" ':-> Bool]]

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Versions [faq] 0.1.0.0, 0.1.0.1, 0.2.0.0
Change log CHANGELOG.md
Dependencies base (>=4.12.0.0 && <4.13), singletons (>=2.5.1 && <2.6), text (>=1.2.3.1 && <1.3) [details]
License MIT
Author Sam Schweigel
Maintainer Sam Schweigel <s.schweigel@gmail.com>
Category Data
Home page https://github.com/sjsch/named-sop
Source repo head: git clone https://github.com/sjsch/named-sop
Uploaded by sjsch at Thu Jul 18 02:30:50 UTC 2019
Distributions NixOS:0.2.0.0
Downloads 88 total (24 in the last 30 days)
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Status Hackage Matrix CI
Docs available [build log]
Last success reported on 2019-07-18 [all 1 reports]

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Readme for named-sop-0.2.0.0

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named-sop: Dependently-typed sums and products, tagged by field name

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Sums and Maps (products) indexed by a typelevel map of their field (or constructor) names and types. They can be combined and split again; their typelevel map is sorted to ensure that the end result is independent of the order you combine it in.

"Data.NamedSOP.Generic" contains functions for automatically converting between types with a Generic instance and named sums of products:

>>> data A = C { a :: Int, b :: Bool } 
>>>          | D Int Bool deriving (Generic)
>>> :t genSum (C 3 True)
NSum
 '[ "_C" ':-> NMap '[ "a" ':-> Int, "b" ':-> Bool],
    "_D" ':-> NMap '[ "_1" ':-> Int, "_2" ':-> Bool]]