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name : Negative.php

 <?php

/**
 * Negative
 *
 * @package Less
 * @subpackage tree
 */
class Less_Tree_Negative extends Less_Tree{

	public $value;
	public $type = 'Negative';

    public function __construct($node){
		$this->value = $node;
	}

	//function accept($visitor) {
	//	$this->value = $visitor->visit($this->value);
	//}

    /**
     * @see Less_Tree::genCSS
     */
    public function genCSS( $output ){
		$output->add( '-' );
		$this->value->genCSS( $output );
	}

    public function compile($env) {
		if( Less_Environment::isMathOn() ){
			$ret = new Less_Tree_Operation('*', array( new Less_Tree_Dimension(-1), $this->value ) );
			return $ret->compile($env);
		}
		return new Less_Tree_Negative( $this->value->compile($env) );
	}
}

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