anchor.diff:     ;
   
   
  -Paren
  -   : '(' | ')' | '[' | ']' | '{' | '}'
  -   ;
  -
  -
  -Delim
  -   : '`' | '\'' | '"' | '.' | ';' | ','
  -   ;
  -
   // fragments
   
   fragment WhiteSpace
  
positive.code: 
  grammar Lasca;
  
  valDef: VAL Id (':' type)? '=' expr;
  
  literal:
        IntegerLiteral # integer
  
negative.code: 
  blockStat
     : valDef
     | expr
     |
     ;
  