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

    module Distribution.Types.ForeignLibType
      ( ForeignLibType (..)
      , knownForeignLibTypes
      , foreignLibTypeIsShared
      ) where

    import Distribution.Compat.Prelude
    import Distribution.PackageDescription.Utils
    import Prelude ()

    import Distribution.Parsec
    import Distribution.Pretty

    import qualified Distribution.Compat.CharParsing as P
    import qualified Text.PrettyPrint as Disp

    -- | What kind of foreign library is to be built?
    data ForeignLibType
      = -- | A native shared library (@.so@ on Linux, @.dylib@ on OSX, or
        -- @.dll@ on Windows).
        ForeignLibNativeShared
      | -- | A native static library (not currently supported.)
        ForeignLibNativeStatic
      | -- TODO: Maybe this should record a string?
        ForeignLibTypeUnknown
      deriving ((forall x. ForeignLibType -> Rep ForeignLibType x)
    -> (forall x. Rep ForeignLibType x -> ForeignLibType)
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    instance Pretty ForeignLibType where
      pretty :: ForeignLibType -> Doc
    pretty ForeignLibType
    ForeignLibNativeShared = String -> Doc
    Disp.text String
    "native-shared"
      pretty ForeignLibType
    ForeignLibNativeStatic = String -> Doc
    Disp.text String
    "native-static"
      pretty ForeignLibType
    ForeignLibTypeUnknown = String -> Doc
    Disp.text String
    "unknown"

    instance Parsec ForeignLibType where
      parsec :: forall (m :: * -> *). CabalParsing m => m ForeignLibType
    parsec = do
        name <- (Char -> Bool) -> m String
    forall (m :: * -> *). CharParsing m => (Char -> Bool) -> m String
    P.munch1 (\Char
    c -> Char -> Bool
    isAlphaNum Char
    c Bool -> Bool -> Bool
    || Char
    c Char -> Char -> Bool
    forall a. Eq a => a -> a -> Bool
    == Char
    '-')
        return $ case name of
          String
    "native-shared" -> ForeignLibType
    ForeignLibNativeShared
          String
    "native-static" -> ForeignLibType
    ForeignLibNativeStatic
          String
    _ -> ForeignLibType
    ForeignLibTypeUnknown

    instance Binary ForeignLibType
    instance Structured ForeignLibType
    instance NFData ForeignLibType where rnf :: ForeignLibType -> ()
    rnf = ForeignLibType -> ()
    forall a. (Generic a, GNFData (Rep a)) => a -> ()
    genericRnf

    instance Semigroup ForeignLibType where
      ForeignLibType
    ForeignLibTypeUnknown <> :: ForeignLibType -> ForeignLibType -> ForeignLibType
    <> ForeignLibType
    b = ForeignLibType
    b
      ForeignLibType
    a <> ForeignLibType
    ForeignLibTypeUnknown = ForeignLibType
    a
      ForeignLibType
    _ <> ForeignLibType
    _ = String -> ForeignLibType
    forall a. HasCallStack => String -> a
    error String
    "Ambiguous foreign library type"

    instance Monoid ForeignLibType where
      mempty :: ForeignLibType
    mempty = ForeignLibType
    ForeignLibTypeUnknown
      mappend :: ForeignLibType -> ForeignLibType -> ForeignLibType
    mappend = ForeignLibType -> ForeignLibType -> ForeignLibType
    forall a. Semigroup a => a -> a -> a
    (<>)

    knownForeignLibTypes :: [ForeignLibType]
    knownForeignLibTypes :: [ForeignLibType]
    knownForeignLibTypes =
      [ ForeignLibType
    ForeignLibNativeShared
      , ForeignLibType
    ForeignLibNativeStatic
      ]

    foreignLibTypeIsShared :: ForeignLibType -> Bool
    foreignLibTypeIsShared :: ForeignLibType -> Bool
    foreignLibTypeIsShared ForeignLibType
    t =
      case ForeignLibType
    t of
        ForeignLibType
    ForeignLibNativeShared -> Bool
    True
        ForeignLibType
    ForeignLibNativeStatic -> Bool
    False
        ForeignLibType
    ForeignLibTypeUnknown -> String -> Bool
    forall a. String -> a
    cabalBug String
    "Unknown foreign library type"