anchor.diff:     ;
   
   
  -REP
  -   : R E P
  +INCLUDE
  +   : I N C L U D E
  +   ;
  +
  +
  +TITLE
  +   : T I T L E
  +   ;
  +
  +
  +END
  +   : E N D
  +   ;
  +
  +
  +ORG
  +   : O R G
  +   ;
  +
  +
  +ENDIF
  +   : E N D I F
  +   ;
  +
  +
  +IF
  +   : I F
  +   ;
  +
  +
  +EQU
  +   : E Q U
  +   ;
  +
  +
  +DW
  +   : D W
  +   ;
  +
  +
  +DB
  +   : D B
      ;
   
   
  
positive.code:    ;
  
  line
     : lbl? (instruction | directive | title | include)? comment?
     ;
  
  title
  
negative.code:    ;
  
  include
     : INCLUDE string
     ;
  
  expressionlist
  