anchor.diff:      :   LBRACK mapEntryList RBRACK
       ;
   
  +/* referenced by error alternatives, which are commented
   closureListExpression
       :   LPAREN statementExpression (SEMI statementExpression)+ RPAREN
       ;
  +*/
   
   primary
       :   identifier                                                                          #identifierPrmrAlt
  
positive.code:     |   namedPropertyArgs
          { $t = 5; }
  
      // !!!ERROR ALTERNATIVE!!!
      |   nls closureListExpression (nls statement)?
          { false }?<fail={"Expression list of the form (a; b; c) is not supported in this context"}>
      ;
  
  /**
  
negative.code:     :   statementExpression
      |   standardLambda
  
      /* !!!ERROR ALTERNATIVE!!! POOR PERFORMANCE!
      |   closureListExpression { false }?<fail={"Expression list of the form (a; b; c) is not supported in this context"}>
      */
      ;
  
  variableInitializers
  