Lab 5: Building a syntax tree

  1. Download skeleton files.
  2. Different way of writing grammars:
    ProductionsGrammarsAlternate grammars 
    ExpList    -> Exp ExpRest*    
           ->

ExpRest    -> , Exp

    ExpList    : Exp ExpRestSeq
           | /* Empty */
           ;

ExpRestSeq : ExpRestSeq ExpRest    
           | /* Empty */
           ;

ExpRest    : ',' Exp
           ;

    ExpList    : ExpList_ne
           | /* Empty */
           ;

ExpList_ne : ExpList_ne ',' Exp
           | Exp
           ;
  3. Classes hierarchy: