dev-haskell/monad-control/metadata.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<herd>haskell</herd>
	<longdescription>
		This package defines the type class @MonadControlIO@, a subset of
		@MonadIO@ into which generic control operations such as @catch@ can
		be lifted from @IO@.  Instances are based on monad transformers in
		@MonadTransControl@, which includes all standard monad transformers
		in the @transformers@ library except @ContT@.  For convenience, it
		provides a wrapped version of @Control.Exception@ with types
		generalized from @IO@ to all monads in @MonadControlIO@.
		
		Note that this package is a rewrite of Anders Kaseorg&#39;s @monad-peel@ library.
		The main difference is that this package provides CPS style
		operators and exploits the @RankNTypes@ language extension to
		simplify most definitions.
		
		The package includes a copy of the @monad-peel@ testsuite written by Anders Kaseorg.
		The tests can be performed by using @cabal test@.
		
		The following @critertion@ based benchmark shows that @monad-control@
		is on average about 2.5 times faster than @monad-peel@:
		
		&lt;https://github.com/basvandijk/bench-monad-peel-control&gt;
	</longdescription>
	<use>
                <flag name="instancest">If enabled this package will export
                MonadBaseControl instances for the lazy and strict ST monad. If disabled these
                instances are only exported when base >= 4.4. If enabled it is required that
                the transformer-base package exports MonadBase instances for ST. It will do
                this by default.</flag>
	</use>
</pkgmetadata>