diff options
Diffstat (limited to 'dev-haskell/deriving-compat/metadata.xml')
| -rw-r--r-- | dev-haskell/deriving-compat/metadata.xml | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/dev-haskell/deriving-compat/metadata.xml b/dev-haskell/deriving-compat/metadata.xml new file mode 100644 index 000000000000..047211a1b6d5 --- /dev/null +++ b/dev-haskell/deriving-compat/metadata.xml @@ -0,0 +1,54 @@ +<?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> + Provides Template Haskell functions that mimic deriving + extensions that were introduced or modified in recent versions + of GHC. Currently, the following extensions are covered: + + * @DeriveFoldable@ + + * @DeriveFunctor@ + + * @DeriveTraversable@ + + The following changes have been backported: + + * In GHC 8.0, @DeriveFoldable@ was changed to allow folding + over data types with existential constraints. + + * In GHC 8.0, @DeriveFoldable@ and @DeriveTraversable@ were + changed so as not to generate superfluous @mempty@ or @pure@ + expressions in generated code. As a result, this allows + deriving @Traversable@ instances for datatypes with unlifted + argument types. + + * In GHC 8.0, deriving @Show@ was changed so that constructor fields + with unlifted types are no longer shown with parentheses, and + the output of showing an unlifted type is suffixed with the same + number of hash signs as the corresponding primitive literals. + + * In GHC 8.2, deriving `Ord` was changed so that it generates concrete + @if@-expressions that are not subject to @RebindableSyntax@. + + Note that some recent GHC extensions are not covered by this package: + + * @DeriveGeneric@, which was introducted in GHC 7.2 for deriving + @Generic@ instances, and modified in GHC 7.6 to allow derivation + of @Generic1@ instances. Use @Generics.Deriving.TH@ from + @<http://hackage.haskell.org/package/generic-deriving generic-deriving>@ + to derive @Generic(1)@ using Template Haskell. + + * @DeriveLift@, which was introduced in GHC 8.0 for deriving + @Lift@ instances. Use @Language.Haskell.TH.Lift@ from + @<http://hackage.haskell.org/package/th-lift th-lift>@ + to derive @Lift@ using Template Haskell. + </longdescription> + <upstream> + <remote-id type="github">haskell-compat/deriving-compat</remote-id> + </upstream> +</pkgmetadata> |