anchor.diff:  
   array_type_denoter:		type_denoter '[]';
   
  -decl_type_denoter:		var_name;
  +pointer_type_denoter:	var_name;
   
   VOID_TYPE_DENOTER:		'void';
   BOOL_TYPE_DENOTER:		'bool';
  
positive.code: array_index:		expr;
  
  // CLASSES
  class_decl_stmnt:			intern_class_decl_stmnt | extern_class_decl_stmnt;
  intern_class_decl_stmnt:	'class' class_name type_inheritance? class_body;
  extern_class_decl_stmnt:	'extern' 'class' class_name extern_class_body;
  class_body:					'{' class_body_segment_list '}';
  
negative.code: // TYPE DENOTERS
  type_denoter			: builtin_type_denoter
  						| array_type_denoter
  						| pointer_type_denoter;
  
  builtin_type_denoter	: BOOL_TYPE_DENOTER
  						| INT_TYPE_DENOTER
  