[...] I think..
withArrayLength :: Storable a => [a] -> (Ptr a -> Int -> IO b) -> IO b
would be useful because you often need the length in a foreign function
I would support that, similar situations happened a few times in my OpenGL/GLUT stuff.
and I guess withArray must pre-calculate the length before allocating storage in any case [...]
Yep.
Cheers, S.
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