1<?php
2
3/**
4 * Hoa
5 *
6 *
7 * @license
8 *
9 * New BSD License
10 *
11 * Copyright © 2007-2017, Hoa community. All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions are met:
15 *     * Redistributions of source code must retain the above copyright
16 *       notice, this list of conditions and the following disclaimer.
17 *     * Redistributions in binary form must reproduce the above copyright
18 *       notice, this list of conditions and the following disclaimer in the
19 *       documentation and/or other materials provided with the distribution.
20 *     * Neither the name of the Hoa nor the names of its contributors may be
21 *       used to endorse or promote products derived from this software without
22 *       specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37namespace Hoa\Compiler\Llk\Rule;
38
39use Hoa\Compiler;
40
41/**
42 * Class \Hoa\Compiler\Llk\Rule\Repetition.
43 *
44 * The repetition rule.
45 *
46 * @copyright  Copyright © 2007-2017 Hoa community
47 * @license    New BSD License
48 */
49class Repetition extends Rule
50{
51    /**
52     * Minimum bound.
53     *
54     * @var int
55     */
56    protected $_min = 0;
57
58    /**
59     * Maximum bound.
60     *
61     * @var int
62     */
63    protected $_max = 0;
64
65
66
67    /**
68     * Constructor.
69     *
70     * @param   string  $name        Name.
71     * @param   int     $min         Minimum bound.
72     * @param   int     $max         Maximum bound.
73     * @param   mixed   $children    Children.
74     * @param   string  $nodeId      Node ID.
75     */
76    public function __construct($name, $min, $max, $children, $nodeId)
77    {
78        parent::__construct($name, $children, $nodeId);
79
80        $min = max(0, (int) $min);
81        $max = max(-1, (int) $max);
82
83        if (-1 !== $max && $min > $max) {
84            throw new Compiler\Exception\Rule(
85                'Cannot repeat with a min (%d) greater than max (%d).',
86                0,
87                [$min, $max]
88            );
89        }
90
91        $this->_min = $min;
92        $this->_max = $max;
93
94        return;
95    }
96
97    /**
98     * Get minimum bound.
99     *
100     * @return  int
101     */
102    public function getMin()
103    {
104        return $this->_min;
105    }
106
107    /**
108     * Get maximum bound.
109     *
110     * @return  int
111     */
112    public function getMax()
113    {
114        return $this->_max;
115    }
116
117    /**
118     * Check whether the maximum repetition is unbounded.
119     *
120     * @return   bool
121     */
122    public function isInfinite()
123    {
124        return -1 === $this->getMax();
125    }
126}
127