32 lines
1.2 KiB
XML
32 lines
1.2 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
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<pkgmetadata>
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<maintainer type="project">
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<email>haskell@gentoo.org</email>
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<name>Gentoo Haskell</name>
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</maintainer>
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<longdescription>
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This package provides first class labels that can act as
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bidirectional record fields. The labels can be derived
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automatically using Template Haskell which means you don't have
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to write any boilerplate yourself. The labels are implemented as
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lenses and are fully composable. Labels can be used to /get/,
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/set/ and /modify/ parts of a datatype in a consistent way.
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See "Data.Label" for an introductory explanation.
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Internally lenses are not tied to Haskell functions directly,
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but are implemented as arrows. Arrows allow the lenses to be run
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in custom computational contexts. This approach allows us to
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make partial lenses that point to fields of multi-constructor
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datatypes in an elegant way.
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See the "Data.Label.Maybe" module for the use of partial labels.
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> 1.0.3 -> 1.0.4
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> - Bugfix to compile on GHC 6.12 again.
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</longdescription>
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<upstream>
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<remote-id type="github">sebastiaanvisser/fclabels</remote-id>
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</upstream>
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</pkgmetadata>
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