Re: [hoc-users] Pointer arguments to methods

[David C. <dw...@dw...>]

>
> - (BOOL)writeToFile:(NSString *)path options:(unsigned) 
> writeOptionsMask error:(NSError **)errorPtr;
>
> What should be the Haskell type of this?
>
> NSString a -> CUInt -> (Bool, NSError ()) ?

As there is a possibility that this error is null, (i.e., no error),  
perhaps it should be:

NSString a -> CUInt -> (Bool, Maybe NSError ())

Whether this should be the pattern in the general case, I do not  
know, but it seems like it (c|sh)ould be supported.

What about instances where we have an in/out parameter?  (Can't think  
of anything specifically in cocoa, but a lot of low-level c-code  
structs have this when passing pointers.)  Those circumstances would  
have to be hand-added to the bindings, I believe.  Any possibility of  
turning them into IORefs?

David