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This was delivered as part of 5.2
Hi Patrick, that is a misunderstand - we prefer NULL() to SYSNULL(), as a NULL() value is protected to any access (read & write) while SYSNULL() allows reading. That's why we want the same behavior under LP(64).
We also don't like NULL(). So we try to eliminate this on all sources. But there are some PL/I macros (like from MQ Series) that "uses" NULL() - they changed to SYSNULL() by our request.
I would like to deprecate NULL().
For any invalid Pointer, POINTERVALUE(-1) may be better ?
Or a new BIF INVALIDPTR()...
this would be good to have