Are there plans to include C99 'complex' type in Foreign, maybe as CFloatComplex, CDoubleComplex and CLongDoubleComplex? This seems an easy addition to the standard and would allow binding of a few interesting libraries, like GSL.
A separate library for new types to add to Foreign would be the easiest way forward. Just put the foreign-c99 package on Hackage?
As far as I know, this is not possible. (I tried for a long time to do that, actually, until I reallized it could not be done.) If it's not true, i.e., I could actually have some arbitrary sized parameter as argument to a function or as a return value (and not its pointer), what did I saw wrong? I understand only Foreign.C.C* types or forall a. => Foreign.Ptr.Ptr a can be used like that. Maurício