Re: ForeignPtr's - why can't they be passed directly to foreignfunctions?

Brian Hulley wrote:

Hi - I've got the beginnings of an API for a GUI system as follows:

foreign import ccall duma_createEdit :: IO (Ptr (Edit a))

createEdit :: IO (ForeignPtr (Edit a))

These should of course be: foreign import ccall duma_createEdit :: IO (Ptr (Edit ())) and createEdit :: IO (ForeignPtr (Edit ())) (just in case anyone else new to phantom types reads this email before writing a GUI) Regards, Brian.