From: arne@vajhoej.dk

On 12/6/2025 10:33 AM, Arne Vajhøj wrote:
> On 12/6/2025 5:42 AM, Marc Van Dyck wrote:
>> User written lexical functions, on the other hand, would be a real
>> bonus. There are, for one, still many parts of the operating system
>> for which you need to get information, and the only possible way to do
>> it is to parse some output (think of everything TCP/IP, for example),
>> while there is a callable interface available to get the info properly.
>
> Yes.
>
> And even though it is possible to run an exe that set a symbol
> with lib$set_symbol, then getting it as a lexical would make it
> more readable.

Note that VSI could add it to existing DCL:

f$udl(shrimg, arg1, ...)

with a convention of entry point:

int udl$function(int narg, enum dcl_type *argtyp, void *argval, enum
dcl_typ *rettyp, void *retval)

If they wanted to.

New lexical functions have been added over time.

Arne

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