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{-# LANGUAGE ForeignFunctionInterface, CApiFFI, GHCForeignImportPrim,
QuasiQuotes, TemplateHaskell, JavaScriptFFI, MagicHash,
UnliftedFFITypes #-}
module TH_foreignCallingConventions where
import GHC.Prim
import Control.Applicative
import Language.Haskell.TH
import System.IO
import Foreign.Ptr
$( do let fi cconv safety lbl name ty =
ForeignD (ImportF cconv safety lbl name ty)
dec1 <- fi CCall Interruptible "&" (mkName "foo") <$> [t| Ptr () |]
dec2 <- fi Prim Safe "bar" (mkName "bar") <$> [t| Int# -> Int# |]
-- the declarations below would result in warnings or errors when returned
dec3 <- fi CApi Unsafe "baz" (mkName "baz") <$> [t| Double -> IO () |]
dec4 <- fi StdCall Safe "bay" (mkName "bay") <$> [t| (Int -> Bool) -> IO Int |]
dec5 <- fi JavaScript Unsafe "bax" (mkName "bax") <$> [t| Ptr Int -> IO String |]
runIO $
mapM_ (putStrLn . pprint) [dec1, dec2, dec3, dec4, dec5] >> hFlush stdout
return [dec1, dec2]
)
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