[fpc-devel] Using Macros for IInterface

[michael.vancanneyt at wisa.be]

On Wed, 26 Sep 2012, Sven Barth wrote:

> Am 26.09.2012 12:28, schrieb Marco van de Voort:
>> In our previous episode, Sven Barth said:
>>>>          end;
>>>>          IInterface = IUnknown;
>>> 
>>> This depends on whether we want to enable $macro in the system unit...
>> 
>> It doesn't work at all since macro's don't export over unit borders.
>> 
>
> Nowhere did I mention that it needs to be exported... that's why I thought of 
> the following as a "convention".
>
>>> My suggestions (if we do indeed enable it):
>>> intfconst for constref/const
>>> intfdecl for stdcall/cdecl {I would not use extdecl so that there are no
>>> potential conflicts}
>> 
>> libcall was already mentioned. It also helps in a lot of other places, and
>> kills ninetynine percent of macro use. (which IMHO is always a good thing)
>
> The question is then whether this should indeed be a new calling convention 
> or merely something that translates to stdcall/cdecl...

I would be in favour of handling it at the level of the parser, but
simply translate to cdecl/stdcall. 
I would not use a macro that is handled on the level of the scanner.

The parser has more info at it's disposal, which could be useful if the 
behaviour needs to be refined.

Michael.