Re: [jhc] New Extension: foreign C imports that return multiple values

On Fri, 10 Feb 2012, John Meacham wrote:

foreign import ccall "math.h frexp" c_frexp :: Double -> Ptr CInt -> IO Double

-- This extension allows it to be declared as so foreign import ccall "math.h frexp" c_frexp :: Double -> (# Double, CInt #)

-- The second return value is added as the last 'exp' parameter then read out -- of the allocated memory. The contents of the memory passed into the function -- is undefined.

Nice idea - how does JHC know where the pointer parameters are? Is it possible to have the pointer arguments at the first position?