anchor.diff:  *
   * It's a Work in progress, most of the .h file can be parsed
   * June 2008 Cedric Cuche
  +* Updated June 2014, Carlos Mejia.  Fix try-catch, add support for @( @{ @[
   **/
   
   grammar ObjC;
  
positive.code: LINE_COMMENT
      : '//' ~[\r\n]*  -> channel(HIDDEN)
      ;
  
negative.code: iteration_statement
    : 'while' '(' expression ')' statement
    | 'do' statement 'while' '(' expression ')' ';'
    | 'for' '(' ((declaration_specifiers init_declarator_list) | expression)? ';' expression? ';' expression? ')' statement
    | 'for' '(' type_variable_declarator 'in' expression? ')' statement ;
  
  jump_statement
    : 'goto' identifier ';'
  