Structure Text Switch Condition Fails To Compile, When Missing Case Block

[PBaswat]

i am trying to compile function which has switch case, but it contails only else block.
when trying to build program, getting compile error.
Sample code is as below:

funcSwitchCaseTest.ST:

FUNCTION funcSwitchCaseTest : BOOL
   VAR_INPUT
      inVar : DINT; 
   END_VAR
   VAR
      retVar : BOOL;
   END_VAR
    
    case inVar of
    else
        retVar := FALSE;
    end_case;
    funcSwitchCaseTest := retVar;
END_FUNCTION

Getting following compile errors as,
error: Unexpected token: expected Literal but found else
┌─ funcSwitchCaseTest.ST:10:5
│
10 │ else
│ ^^^^ Unexpected token: expected Literal but found else

error: Unexpected token: expected KeywordSemicolon but found 'else
retVar := FALSE'
┌─ funcSwitchCaseTest.ST:10:5
│
10 │ ╭ else
11 │ │ retVar := FALSE;
│ ╰───────────────────────^ Unexpected token: expected KeywordSemicolon but found 'else
retVar := FALSE'

error: Unexpected token: expected Literal but found end_case
┌─ funcSwitchCaseTest.ST:12:5
│
12 │ end_case;
│ ^^^^^^^^ Unexpected token: expected Literal but found end_case

error: Unexpected token: expected KeywordSemicolon but found 'end_case'
┌─ funcSwitchCaseTest.ST:12:5
│
12 │ end_case;
│ ^^^^^^^^ Unexpected token: expected KeywordSemicolon but found 'end_case'

Is this issue with rusty compiler?

[ghaith]

Hi, technically it is an issue but the situation is strange, the example you showed is missing the select statements for the case, meaning the code will always go into the else block making the case irrelevant.
I am not sure if we should support an empty case, but I would recommend you just commend out the CASE and ELSE and END_CASE blocks in your code.