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-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
-<pkgmetadata>
- <maintainer type="project">
- <email>haskell@gentoo.org</email>
- <name>Gentoo Haskell</name>
- </maintainer>
- <longdescription>
- Property based testing libraries such as QuickCheck tend to include type modifiers. Most of them
- are used to quantify over subsets of a type. For example a property on non-empty lists:
-
- @ prop_tail_length (NonEmpty xs) = length (tail xs) == length xs - 1 @
-
- This library is intended to supply these modifiers to be used by testing libraries, in an effort to make
- properties more portable between testing frameworks.
-
- For every modifier it also provides an access function that converts to the underlying type, which
- enables point-free style properties as such:
-
- @
- prop_tail_length2 = (&gt; 0) . length . nonEmpty
- @
- </longdescription>
-</pkgmetadata>