Compilation error due to address of operator (&)

[kanishka-karan]

Hi

We are trying to find the address of variable using below code using master branch

FUNCTION LOCATION_OF_VARIABLE : LWORD
VAR_IN_OUT
    ARG : DWORD;
END_VAR

VAR
   TEMP : REF_TO DWORD;
END_VAR

   TEMP := &ARG;
   LOCATION_OF_VARIABLE := LWORD#TEMP;
END_FUNCTION

The compilation error we are getting is

[SCRIPT-INFO] : Compiling ST Source Using RuStY Compiler, Please wait............
error[E007]: Unexpected token: expected Literal but found &
   ┌─ ../LOCATION_OF_VARIABLE.ST:22:13
   │
22 │     TEMP := &ARG;
   │             ^ Unexpected token: expected Literal but found &

Compilation aborted due to critical parse errors.
Hint: You can use `plc explain <ErrorCode>` for more information
[SCRIPT-ERROR] : Fails To Compile ST Source Files Using RuStY  !!!

Same code was working fine with tag 0.2 but with master branch its failing to compile.

Can you please help, how to resolve the error.

Thanks You

[ghaith]

Hello, try REF(ARG) instead of &ARG on line 22, we had to remove the & because it's reserved as an AND operator. Pointers references can be obtained with ADR and REF

[kanishka-karan]

It worked
Thank You