[Haskell-cafe] FFI export questions

John Goerzen jgoerzen at complete.org
Thu Mar 17 15:11:31 EST 2005


I'm trying to make a Haskell binding for the FUSE library,
http://fuse.sourceforge.net/.  The FUSE concept is centered around a
struct whose members are pointers to callback functions.

Here's the problem: the functions I want to callback to have types like

vGetLine :: HVFS a -> a -> IO String

Now, I can't just pass some sort of opaque pointer to C, because then
the exact type of a would be lost.

Is there any other method I might try?



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