/**
* Constructor
*/
function __construct()
{
// super-construct with Lex and Grammar
parent::__construct(new BNFLex(), new BNFGrammar());
// set pre-compiled parse table
$this->Table = new BNFParseTable();
// register custom parse nodes ...
$this->register_node_class(BNF_RULES, 'BNFRulesNode');
$this->register_node_class(BNF_RULE, 'BNFRuleNode');
$this->register_node_class(BNF_EMPTY_RULE, 'BNFRuleNode');
$this->register_node_class(BNF_EXPRESSION, 'BNFExpressionNode');
$this->register_node_class(BNF_LIST, 'BNFListNode');
$this->register_node_class(BNF_TERM, 'BNFTermNode');
}
