The fin package

[ Tags: bsd3, data, library ] [ Propose Tags ]

This package provides two simple types, and some tools to work with them. Also on type level as DataKinds.

-- Peano naturals
data Nat = Z | S Nat

-- Finite naturals
data Fin (n :: Nat) where
    Z :: Fin ('S n)
    S :: Fin n -> Fin ('Nat.S n)

vec implements length-indexed (sized) lists using this package for indexes.

The Data.Fin.Enum module let's work generically with enumerations.

See Hasochism: the pleasure and pain of dependently typed haskell programming by Sam Lindley and Conor McBride for answers to how and why. Read APLicative Programming with Naperian Functors by Jeremy Gibbons for (not so) different ones.

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Versions 0
Change log ChangeLog.md
Dependencies base (>=4.7 && <4.11), deepseq (>=1.3.0.2 && <1.5), hashable (>=1.2.6.1 && <1.3), nats (>=1 && <1.2), semigroups (>=0.18.3 && <0.19), void (>=0.7.2 && <0.8) [details]
License BSD3
Copyright (c) 2017 Oleg Grenrus
Author Oleg Grenrus <oleg.grenrus@iki.fi>
Maintainer Oleg.Grenrus <oleg.grenrus@iki.fi>
Category Data
Home page https://github.com/phadej/vec
Bug tracker https://github.com/phadej/vec/issues
Source repository head: git clone https://github.com/phadej/vec.git
Uploaded Tue Nov 21 12:17:41 UTC 2017 by phadej
Updated Wed Nov 29 19:24:47 UTC 2017 by phadej to revision 2   [What is this?]
Distributions NixOS:0
Downloads 144 total (144 in the last 30 days)
Rating 2.0 (votes: 1) [estimated by rule of succession]
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Status Docs available [build log]
Last success reported on 2017-11-21 [all 1 reports]
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