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  1. data DeriveOptions

    avro Data.Avro.Deriving

    Derives Avro from a given schema file. Generates data types, FromAvro and ToAvro instances.

  2. DeriveOptions :: (Text -> Field -> Text) -> (TypeName -> Field -> (FieldStrictness, FieldUnpackedness)) -> NamespaceBehavior -> DeriveOptions

    avro Data.Avro.Deriving

    No documentation available.

  3. module Database.Relational.Derives

    This module defines typed SQLs derived from type information.

  4. data DerivedVal i d

    tasty-checklist Test.Tasty.Checklist

    Each entry in the Assignment list for checkValues should be one of these DerivedVal values. The i type parameter is the input type, and the d is the value derived from that input type.

  5. class DeriveUniverseSome a

    universe-some Data.Universe.Some.TH

    Derive the UniverseSome n instance. 

    >>> :set -XGADTs -XTemplateHaskell -XStandaloneDeriving

>>> import Data.Universe.Class (universe)

>>> import Data.GADT.Show

    >>> data Tag b a where IntTag :: Tag b Int; BoolTag :: b -> Tag b Bool

>>> deriving instance Show b => Show (Tag b a)

>>> instance Show b => GShow (Tag b) where gshowsPrec = showsPrec
    (data Unused is to workaround bug in older GHCi) >>> data Unused; $(deriveUniverseSome ''Tag) 
    >>> universe :: [Some (Tag (Maybe Bool))]
[Some IntTag,Some (BoolTag Nothing),Some (BoolTag (Just False)),Some (BoolTag (Just True))]
    deriveUniverseSome variant taking a Name guesses simple class constraints. If you need more specific, you can specify them: (Note: on older GHCs this will warn, as the instance definition doesn't have all methods defined). 
    >>> data Tag b a where IntTag :: Tag b Int; BoolTag :: b -> Tag b Bool

>>> deriving instance Show b => Show (Tag b a)

>>> instance Show b => GShow (Tag b) where gshowsPrec = showsPrec

>>> data Unused; $(deriveUniverseSome ([d| instance Universe b => UniverseSome (Tag b) |] :: DecsQ))
...

>>> universe :: [Some (Tag (Maybe Bool))]
[Some IntTag,Some (BoolTag Nothing),Some (BoolTag (Just False)),Some (BoolTag (Just True))]

  6. DeriveKeyPairError :: String -> HPKEError

    hpke Crypto.HPKE

    No documentation available.

  7. class Deriver cls

    th-utilities TH.Derive

    Instances of Deriver describe a default way of creating an instance for a particular typeclass. For example, if I wanted to write something that derives Eq instances, I would write a instance Deriver (Eq a).

  8. module Text.Earley.Derived

    Derived operators.

  9. module Data.Aeson.DeriveNoPrefix

    Template Haskell macros to derive ToJSON/FromJSON instances in a more prefix-friendly manner. See https://gitlab.com/igrep/deriveJsonNoPrefix#readme.

  10. data DeriveConfig

    grisette Grisette.Internal.TH.Derivation.Common

    Configuration for deriving instances for a data type.

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