[Haskell-cafe] sizeOf on a type

[Thomas DuBuisson]

> I would like to write a routine like
>
>        nextPtr :: Storable a => Ptr a -> Ptr a
>        nextPtr = (`plusPtr` sizeOf (undefined :: a))

How about:
    getA :: Ptr a -> a
    getA _ = undefined

    nextPtr ptr = (`plusPtr` sizeOf (getA ptr)) ptr

-Thomas