On Jul 17, 2008, at 5:36 PM, Max Taylor wrote:
>
> What if I wanted to send a 'short' or a 'pointer' or a 'single', or  
> a 'double' to the above example once it has been DEF'd?
>

To quote the reference manual: "The number, order, and data types of the
parameters in the Def Fn Using <Fn address> list must match the  
number, order, and data
types in the parameter list of the referenced function"

Good try but Def FN  using is not the answer for what you seek( but  
keep reading ).


> Could the number and type of the parameters be totally dynamic?
>
> Is it possible to build such a FN?

The question's timing is good. Recently, the FBtoC team ( mostly  
Bernie ) pondered how to use a Core Foundation call that accepts a  
variable number of parameters ( CFStringCreateWithFormat ) without  
interfering with the possible use of the same call by the FBer's code.  
A PASSTHROUGH solution is possible but ugly. Bernie did some research  
and came up with the va_start and va_list C macros. The work is still  
in progress ( and experimental ---so no promises )  and hasn't been  
submitted to the team yet, but initial work is promising. So, yes  
there is a possibility that calling user FNs with multiple parms is  
possible. However, when/if implemented it will be FBtoC-only.

Brian S.