What should I use for USAGE HANDLE items instead of NULL?
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Question:
My program uses a lot of USAGE HANDLE items that I set to NULL and check for NULL to mean that the handle has not been created yet.
The compiler gives errors such as the following when I compare a USAGE HANDLE item with NULL in a conditional expression. What should I use instead of NULL? Should I use LOW-VALUE?
Here is an example:
The compiler gives errors such as the following when I compare a USAGE HANDLE item with NULL in a conditional expression. What should I use instead of NULL? Should I use LOW-VALUE?
--S: Illegal condition IF; file = swlibs\SWMESG.PL, line = 1005, col 4 Here is an example:
000000 IF CUST-FONT-HANDLE NOT = NULL 000000 MOVE CUST-FONT-HANDLE TO TEXT-FONT-HANDLE 000000 MOVE NULL TO CUST-FONT-HANDLE.I also get errors on MOVE NULL when the destination item is USAGE HANDLE.
Answer:
The fastest solution is to compile with compiler option -ca.