anchor.diff:      ;
   
   ifCond :
  -      IF LBRA expression RBRA statement elseCond?
  +      IF '(' expression ')' statement elseCond?
       ;
   
   elseCond :
  
positive.code:     ;
  
  initializer :
        LCBRA (expression (',' expression)*)?   RCBRA
      | LCBRA (initializer (',' initializer)*)? RCBRA
      | expression
      ;
  
  
negative.code:     ;
  
  arrayPart :
        '[' expression? ']'
      ;
  
  statements :
        '{' statement* '}'
      ;
  
  statement :
  