Cabal-syntax/src/Distribution/Types/PkgconfigDependency.hs

   1 {-# LANGUAGE DeriveDataTypeable #-}
   2 {-# LANGUAGE DeriveGeneric #-}
   3
   4 module Distribution.Types.PkgconfigDependency
   5   ( PkgconfigDependency (..)
   6   ) where
   7
   8 import Distribution.Compat.Prelude
   9 import Prelude ()
  10
  11 import Distribution.Types.PkgconfigName
  12 import Distribution.Types.PkgconfigVersionRange
  13
  14 import Distribution.Parsec
  15 import Distribution.Pretty
  16
  17 import qualified Distribution.Compat.CharParsing as P
  18
  19 -- | Describes a dependency on a pkg-config library
  20 --
  21 -- @since 2.0.0.2
  22 data PkgconfigDependency
  23   = PkgconfigDependency
  24       PkgconfigName
  25       PkgconfigVersionRange
  26   deriving (Generic, Read, Show, Eq, Ord, Typeable, Data)
  27
  28 instance Binary PkgconfigDependency
  29 instance Structured PkgconfigDependency
  30 instance NFData PkgconfigDependency where rnf = genericRnf
  31
  32 instance Pretty PkgconfigDependency where
  33   pretty (PkgconfigDependency name PcAnyVersion) = pretty name
  34   pretty (PkgconfigDependency name ver) = pretty name <+> pretty ver
  35
  36 instance Parsec PkgconfigDependency where
  37   parsec = do
  38     name <- parsec
  39     P.spaces
  40     verRange <- parsec <|> pure anyPkgconfigVersion
  41     pure $ PkgconfigDependency name verRange