<?php

/**
 * A class representing a whole AST generated by AFPTreeParser, holding AFPTreeNode's and a list
 * of custom variable names.
 */
class AFPSyntaxTree {
	/**
	 * @var AFPTreeNode|null
	 */
	private $rootNode;
	/**
	 * @var string[]
	 */
	private $variableNames;

	/**
	 * @param string[] $variableNames
	 * @param AFPTreeNode|null $root
	 */
	public function __construct( array $variableNames, AFPTreeNode $root = null ) {
		$this->rootNode = $root;
		$this->variableNames = $variableNames;
	}

	/**
	 * @return AFPTreeNode|null
	 */
	public function getRoot() {
		return $this->rootNode;
	}

	/**
	 * @return string[]
	 */
	public function getVariableNames() {
		return $this->variableNames;
	}
}