vec: Vec: length-indexed (sized) list

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This package provides length-indexed (sized) lists, also known as vectors.

data Vec n a where
    VNil  :: Vec 'Nat.Z a
    (:::) :: a -> Vec n a -> Vec ('Nat.S n) a

The functions are implemented in four flavours:

As best approach depends on the application, vec doesn't do any magic transformation. Benchmark your code.

This package uses fin, i.e. not GHC.TypeLits, for indexes.

For lens or optics support see vec-lens and vec-optics packages respectively.

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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Properties

Versions 0, 0.1, 0.1.1, 0.1.1.1, 0.2, 0.3, 0.3, 0.4, 0.4.1, 0.5, 0.5.1
Change log ChangeLog.md
Dependencies adjunctions (>=4.4 && <4.5), base (>=4.7 && <4.14), deepseq (>=1.3.0.1 && <1.5), distributive (>=0.5.3 && <0.7), fin (>=0.1.1 && <0.2), hashable (>=1.2.7.0 && <1.4), QuickCheck (>=2.13.2 && <2.14), semigroupoids (>=5.2.2 && <5.4), semigroups (>=0.18.4 && <0.20), transformers (>=0.3.0.0 && <0.6), transformers-compat (>=0.6.5 && <0.7) [details]
License BSD-3-Clause
Copyright (c) 2017-2019 Oleg Grenrus
Author Oleg Grenrus <oleg.grenrus@iki.fi>
Maintainer Oleg.Grenrus <oleg.grenrus@iki.fi>
Category Data, Dependent Types
Home page https://github.com/phadej/vec
Bug tracker https://github.com/phadej/vec/issues
Source repo head: git clone https://github.com/phadej/vec.git(vec)
Uploaded by phadej at 2019-12-13T13:43:51Z

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NameDescriptionDefault
adjunctions

Depend on adjunctions to provide its instances

Enabled
distributive

Depend on distributive to provide its instances. Turning on, disables adjunctions too.

Enabled
semigroupoids

Depend on semigroupoids to provide its instances, and traverse1.

Enabled

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info

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