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1<?php
2/**
3 * Allows extending classes to decorate an Iterator with
4 * reduced boilerplate.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 * http://www.gnu.org/copyleft/gpl.html
20 *
21 * @stable to extend
22 * @file
23 * @ingroup Maintenance
24 */
25abstract class IteratorDecorator implements Iterator {
26    protected $iterator;
27
28    /**
29     * @stable to call
30     *
31     * @param Iterator $iterator
32     */
33    public function __construct( Iterator $iterator ) {
34        $this->iterator = $iterator;
35    }
36
37    /**
38     * @inheritDoc
39     * @stable to override
40     */
41    #[\ReturnTypeWillChange]
42    public function current() {
43        return $this->iterator->current();
44    }
45
46    /**
47     * @inheritDoc
48     * @stable to override
49     */
50    #[\ReturnTypeWillChange]
51    public function key() {
52        return $this->iterator->key();
53    }
54
55    /**
56     * @inheritDoc
57     * @stable to override
58     */
59    public function next(): void {
60        $this->iterator->next();
61    }
62
63    /**
64     * @inheritDoc
65     * @stable to override
66     */
67    public function rewind(): void {
68        $this->iterator->rewind();
69    }
70
71    /**
72     * @inheritDoc
73     * @stable to override
74     */
75    public function valid(): bool {
76        return $this->iterator->valid();
77    }
78}