gentoo-overlay/dev-haskell/lens-family-core/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<maintainer type="project">
		<email>haskell@gentoo.org</email>
		<name>Gentoo Haskell</name>
	</maintainer>
	<longdescription>
		This package provides first class( ) functional references.
		In addition to the usual operations of getting, setting and composition, plus integration with the state monad, lens families provide some unique features:
		
		* Polymorphic updating
		
		* Traversals
		
		* Cast projection functions to read-only lenses
		
		* Cast \"toList\" functions to read-only traversals
		
		* Cast semantic editor combinators to modify-only traversals.
		
		( ) For optimal first-class support use the @lens-family@ package with rank 2 / rank N polymorphism.
		"Lens.Family.Clone" allows for first-class support of lenses and traversals for those who require Haskell 98.
	</longdescription>
</pkgmetadata>