54 lines
2.1 KiB
XML
54 lines
2.1 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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Provides Template Haskell functions that mimic deriving
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extensions that were introduced or modified in recent versions
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of GHC. Currently, the following extensions are covered:
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* @DeriveFoldable@
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* @DeriveFunctor@
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* @DeriveTraversable@
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The following changes have been backported:
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* In GHC 8.0, @DeriveFoldable@ was changed to allow folding
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over data types with existential constraints.
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* In GHC 8.0, @DeriveFoldable@ and @DeriveTraversable@ were
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changed so as not to generate superfluous @mempty@ or @pure@
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expressions in generated code. As a result, this allows
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deriving @Traversable@ instances for datatypes with unlifted
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argument types.
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* In GHC 8.0, deriving @Show@ was changed so that constructor fields
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with unlifted types are no longer shown with parentheses, and
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the output of showing an unlifted type is suffixed with the same
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number of hash signs as the corresponding primitive literals.
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* In GHC 8.2, deriving `Ord` was changed so that it generates concrete
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@if@-expressions that are not subject to @RebindableSyntax@.
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Note that some recent GHC extensions are not covered by this package:
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* @DeriveGeneric@, which was introducted in GHC 7.2 for deriving
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@Generic@ instances, and modified in GHC 7.6 to allow derivation
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of @Generic1@ instances. Use @Generics.Deriving.TH@ from
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@<http://hackage.haskell.org/package/generic-deriving generic-deriving>@
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to derive @Generic(1)@ using Template Haskell.
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* @DeriveLift@, which was introduced in GHC 8.0 for deriving
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@Lift@ instances. Use @Language.Haskell.TH.Lift@ from
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@<http://hackage.haskell.org/package/th-lift th-lift>@
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to derive @Lift@ using Template Haskell.
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</longdescription>
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<upstream>
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<remote-id type="github">haskell-compat/deriving-compat</remote-id>
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</upstream>
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</pkgmetadata>
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