Detects the addition of pointers
Justification: In CODESYS, pointer arithmetic is generally permitted and can also be used appropriately. However, it is also a source of errors. Therefore, programming rules exist that generally prohibit pointer arithmetic. This test can check such a requirement.
Importance: Medium
Example
PROGRAM PLC_PRG
VAR
iTest:INT;
ariTest:ARRAY[0..10] OF INT;
{attribute 'analysis':='-111'}
piTest:POINTER TO INT;
i:INT;
END_VAR
piTest := ADR(ariTest[0]); // OK
piTest^:= 0;
piTest := ADR(ariTest) + SIZEOF(INT); // SA0064
piTest^:= 1;
piTest := ADR(ariTest) + 6; // SA0064
piTest^:= 3;
piTest := ADR(ariTest[10]);
FOR i:=0 TO 10 DO
piTest^ := i;
piTest := piTest + 2; // SA0064
END_FOR
--> SA0064: Addition of pointer