1: <?php
 2: /**
 3:  * Pinoco: makes existing static web site dynamic transparently.
 4:  * Copyright 2010-2012, Hisateru Tanaka <tanakahisateru@gmail.com>
 5:  *
 6:  * Licensed under The MIT License
 7:  * Redistributions of files must retain the above copyright notice.
 8:  *
 9:  * PHP Version 5
10:  *
11:  * @author     Hisateru Tanaka <tanakahisateru@gmail.com>
12:  * @copyright  Copyright 2010-2012, Hisateru Tanaka <tanakahisateru@gmail.com>
13:  * @license    MIT License (http://www.opensource.org/licenses/mit-license.php)
14:  * @package    Pinoco
15:  */
16: 
17: /**
18:  * Optional parameter placeholder.
19:  *
20:  * @package Pinoco
21:  */
22: class Pinoco_OptionalParam {
23: 
24:     const UNSPECIFIED = 'c62c4c3f7fa57c7acfcc93073527c490-OptionalParameterUnspecified-d5210620220db619214dd7421301cbf7';
25: 
26:     public static function trim($params)
27:     {
28:         $params = array_reverse($params);
29:         while(!empty($params) && $params[0] instanceof self) {
30:             array_shift($params);
31:         }
32:         return array_reverse($params);
33:     }
34: 
35:     public static function isSpecifiedBy($value)
36:     {
37:         return $value !== self::UNSPECIFIED;
38:     }
39: 
40: }
41: