<?php

/**
 * Keyword
 *
 * @package Less
 * @subpackage tree
 */
class Less_Tree_Keyword extends Less_Tree {

	public $value;
	public $type = 'Keyword';

	/**
	 * @param string $value
	 */
	public function __construct( $value ) {
		$this->value = $value;
	}

	public function compile() {
		return $this;
	}

	/**
	 * @see Less_Tree::genCSS
	 */
	public function genCSS( $output ) {
		if ( $this->value === '%' ) {
			throw new Less_Exception_Compiler( "Invalid % without number" );
		}

		$output->add( $this->value );
	}

	public function compare( $other ) {
		if ( $other instanceof Less_Tree_Keyword ) {
			return $other->value === $this->value ? 0 : 1;
		} else {
			return -1;
		}
	}
}