AS4 to AS6 migration script

CoLab Projects AS6 Migration
, , ,
21

I completely missed that, too. Could we not just put the code below WHEN into an ELSE statement like this?

PROGRAM _CYCLIC
	CASE stepTest OF
		step1:
			var1 := 1;//
			IF expression1 THEN
				stepTest := step2;
			ELSE
				var1 := 2; // this is only executed if expression1 is FALSE
			END_IF
	
		step2:
			IF expression1 THEN
				stepTest := step1;
			END_IF

	END_CASE
	expression1 := FALSE;
END_PROGRAM
22

If you have only one condition per step, then that is no problem. However, I sometimes have more in my code. And then you end up having constructs like

PROGRAM _CYCLIC
	CASE stepTest OF
		step1:
			var1 := 1;//
			IF expression1 THEN
				stepTest := step2;
			ELSE
				var1 := 2; // this is only executed if expression1 is FALSE
				IF expression2 THEN
					stepTest := step3;
				ELSE
					var1 := 3;
					IF expression3 THEN
						stepTest := step 4;
					END_IF;
				END_IF;				
			END_IF
	
		step2:
			...
23

Hi,

just for my understanding, to avoid such constructs as above couldn’t we use the ELSIF statement fo ST?

PROGRAM _CYCLIC
	CASE stepTest OF
		1:
			var1 := 1;//
			IF expression1 THEN
				stepTest := 2;
			ELSIF expression2 THEN
				var1 := 2; // this is only executed if expression1 is FALSE
				stepTest := 3;
			ELSIF expression3 THEN
				var1 := 3; // this is only executed if expression1 AND expression2 is FALSE
				stepTest := 4;
			END_IF
	
		2:
			...
24

@gottsche but it this case you would already have an IF statement, right? How would this code look in AB?