Reference level
Keywords:  reference level
The reference level is expressed as '*' for pointer and '&' for value reference. Higher pointer levels can be defined by a corresponding number of asterisks.
Definition: 
ref_symbol := '*' | '&'
 
    
The reference level is expressed as '*' for pointer and '&' for value reference. Higher pointer levels can be defined by a corresponding number of asterisks.
ref_symbol := '*' | '&'