Re: Converting a C/C++ statement to Ada

[Adam Beneschan <adam@irvine.com>]

On Monday, February 11, 2013 9:14:25 AM UTC-8, Simon Wright wrote:
> "ldries46" writes:
> 
> > Can anyone tell me the Ada equivalent for the following C/C++
> > statement
> 
> > typedef void (*Apple) (Pair *two_side, pointer_type user_data,
> > Error_type *error);
> 
> I think it's something like
> 
>    type Apple is access procedure (two_side : access Pair; 
>                                    user_data : ?; 
>                                    error : access Error_type);
> 
> but of course the parameters may well not need to be accesses.

Right.  Unless the C/C++ code actually does something with the pointer values themselves (such as copying two_side or error into some global pointer variable that gets used later), then they probably should not be accesses, but rather just "in Pair", "out Pair", or "in out Pair" (and similarly for Error_type) depending on whether the Pair or its components are read, written, or both.

                             -- Adam