    {-# LANGUAGE DeriveDataTypeable #-}
    {-# LANGUAGE DeriveGeneric #-}

    module Distribution.Types.PkgconfigDependency
      ( PkgconfigDependency (..)
      ) where

    import Distribution.Compat.Prelude
    import Prelude ()

    import Distribution.Types.PkgconfigName
    import Distribution.Types.PkgconfigVersionRange

    import Distribution.Parsec
    import Distribution.Pretty

    import qualified Distribution.Compat.CharParsing as P

    -- | Describes a dependency on a pkg-config library
    --
    -- @since 2.0.0.2
    data PkgconfigDependency
      = PkgconfigDependency
          PkgconfigName
          PkgconfigVersionRange
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    instance Binary PkgconfigDependency
    instance Structured PkgconfigDependency
    instance NFData PkgconfigDependency where rnf :: PkgconfigDependency -> ()
    rnf = PkgconfigDependency -> ()
    forall a. (Generic a, GNFData (Rep a)) => a -> ()
    genericRnf

    instance Pretty PkgconfigDependency where
      pretty :: PkgconfigDependency -> Doc
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    name PkgconfigVersionRange
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    name PkgconfigVersionRange
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    ver

    instance Parsec PkgconfigDependency where
      parsec :: forall (m :: * -> *). CabalParsing m => m PkgconfigDependency
    parsec = do
        name <- m PkgconfigName
    forall a (m :: * -> *). (Parsec a, CabalParsing m) => m a
    forall (m :: * -> *). CabalParsing m => m PkgconfigName
    parsec
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        verRange <- parsec <|> pure anyPkgconfigVersion
        pure $ PkgconfigDependency name verRange