Detects assignments in conditions of IF, CASE, or REPEAT constructs
Justification: An assignment (:=) and a comparison (=) can easily be mistaken. As a result, an assignment in a condition can easily be unintentional, and it is therefore reported. This can also confuse the reader of the code.
Importance: High
Example
PROGRAM PLC_PRG VAR iCond1:INT := INT#1; iCond2:INT := INT#2; xCond:BOOL := FALSE; iVar : INT; END_VAR IF INT_TO_BOOL(iCond1 := iCond2) THEN // SA0095 iCond1 := INT#1; iCond2 := INT#2; ELSIF (iCond1 := 11) = 11 THEN // SA0095 iCond1 := INT#1; iCond2 := INT#2; END_IF IF xCond := TRUE THEN // SA0095 xCond := FALSE; END_IF IF (xCond := FALSE) OR (iCond1 := iCond2) = 12 THEN // SA0095 xCond := FALSE; iCond1 := INT#1; iCond2 := INT#2; END_IF IF (iVar := iVar + 1) = 120 THEN // SA0095 (can be valid, but is not reparable very well iVar := 0; END_IF WHILE (xCond = TRUE) OR (iCond1 := iCond2) = 12 DO // SA0095 xCond := FALSE; END_WHILE //Error: assignment in repeat loop REPEAT xCond := FALSE; UNTIL (xCond = TRUE) OR (iCond1 := iCond2) = 12 // SA0095 END_REPEAT --> SA0095: Assignment in condition: '...'