<?php



/**

 * Variable

 *

 * @package Less

 * @subpackage tree

 */

class Less_Tree_Variable extends Less_Tree{



	public $name;

	public $index;

	public $currentFileInfo;

	public $evaluating = false;

	public $type = 'Variable';



    /**

     * @param string $name

     */

    public function __construct($name, $index = null, $currentFileInfo = null) {

        $this->name = $name;

        $this->index = $index;

		$this->currentFileInfo = $currentFileInfo;

    }



	public function compile($env) {



		if( $this->name[1] === '@' ){

			$v = new Less_Tree_Variable(substr($this->name, 1), $this->index + 1, $this->currentFileInfo);

			$name = '@' . $v->compile($env)->value;

		}else{

			$name = $this->name;

		}



		if ($this->evaluating) {

			throw new Less_Exception_Compiler("Recursive variable definition for " . $name, null, $this->index, $this->currentFileInfo);

		}



		$this->evaluating = true;



		foreach($env->frames as $frame){

			if( $v = $frame->variable($name) ){

				$r = $v->value->compile($env);

				$this->evaluating = false;

				return $r;

			}

		}



		throw new Less_Exception_Compiler("variable " . $name . " is undefined in file ".$this->currentFileInfo["filename"], null, $this->index, $this->currentFileInfo);

	}



}

