base16-lens: Optics for the Base16 library

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Prisms and pattern synonyms for the Base16 library


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Versions [RSS] 0.1.0.0, 0.1.1.0, 0.1.2.0, 0.1.3.0, 0.1.3.1, 0.1.3.2
Change log CHANGELOG.md
Dependencies base (>=4.10 && <5), base16 (>=0.2.0 && <0.4), bytestring (>=0.10 && <0.11), lens (>=4.0 && <5), text (>=1.2 && <1.3) [details]
License BSD-3-Clause
Copyright (c) 2020 Emily Pillmore
Author Emily Pillmore
Maintainer emilypi@cohomolo.gy
Revised Revision 1 made by topos at 2020-07-13T18:00:10Z
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Home page https://github.com/emilypi/base16-lens
Bug tracker https://github.com/emilypi/base16-lens/issues
Source repo head: git clone https://github.com/emilypi/base16.git
Uploaded by topos at 2020-03-30T03:06:53Z
Distributions LTSHaskell:0.1.3.2, NixOS:0.1.3.2
Downloads 1139 total (15 in the last 30 days)
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Status Docs available [build log]
Last success reported on 2020-03-30 [all 1 reports]

Readme for base16-lens-0.1.2.0

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Base16-lens

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This package provides optics and convenient pattern synonyms for the base16 library.

Patterns

The pattern synonyms provided in this library are:

pattern Hex :: ByteString -> ByteString
pattern Base16 :: ByteString -> ByteString
pattern Base16Lenient :: ByteString -> ByteString
-- and
pattern Hex :: Text -> Text
pattern Base16 :: Text -> Text
pattern Base16Lenient :: Text -> Text

These provide a convenient high level interface for passing Base16 encoded values.

Optics

Prisms for encoding and decoding Text and ByteString values are given as part of the library:

_Hex :: Prism' ByteString ByteString
_Base16 :: Prism' ByteString ByteString
_Base16Lenient :: Iso' ByteString ByteString
-- and
_Hex:: Prism' Text Text
_Base16 :: Prism' Text Text
_Base16Lenient :: Iso' Text Text

If a particular structure has a Lens into some Text or ByteString value they might want to encode (or decode), then composing such a Lens with these Prisms yields an affine Traversal, resulting in a structure which has the focus of its Lens encoded as or decoded from Base16.