Hi,
"dynamic" is used to convert a FunPtr into a native Haskell function.
According to [1], the first Ptr () should be something like FunPtr (Ptr ()
-> Ptr GUID -> IO Int32).
Then you have to cast the function pointer (methPtr in [2]) into a FunPtr
with Foreign.Ptr.castPtrToFunPtr.
Regards,
Sylvain
[1]
https://hackage.haskell.org/package/base-4.7.0.2/docs/Foreign-Ptr.html#g:2
[2] Lines 1420 and 1858 in
https://hackage.haskell.org/package/com-1.2.3.1/src/System/Win32/Com/Automat...
2015-01-23 8:59 GMT+01:00 Henk-Jan van Tuyl
L.S.,
I am trying to compile a package that hasn't been updated since 2009 and I get a lot of messages like: Unacceptable argument type in foreign declaration: Ptr () When checking declaration: foreign import stdcall safe "dynamic" prim_System_Win32_Com_ Automation_TypeLib_setGuid :: Ptr () -> Ptr () -> Ptr GUID -> IO Int32
How can I correct this?
Regards, Henk-Jan van Tuyl
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