Unimplemented Inline function declaration

- Function declaration is not supported
  ex) 
  ```  int i;```
  ``` bool increment(int i) { return i + 1 }```
   is not accepted and ignored -> node that contains function call on such conditional statement for example ``` if increment(2) == 3: ``` will not work but does not get ignored which leads to erroneous output

- Variable reassignment would not work within the declaration section.