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\Visitor;
38
39use Hoa\Visitor;
40
41/**
42 * Class \Hoa\Compiler\Visitor\Dump.
43 *
44 * Dump AST produced by LL(k) compiler.
45 *
46 * @copyright  Copyright © 2007-2017 Hoa community
47 * @license    New BSD License
48 */
49class Dump implements Visitor\Visit
50{
51    /**
52     * Indentation depth.
53     *
54     * @var int
55     */
56    protected static $_i = 0;
57
58
59
60    /**
61     * Visit an element.
62     *
63     * @param   \Hoa\Visitor\Element  $element    Element to visit.
64     * @param   mixed                 &$handle    Handle (reference).
65     * @param   mixed                 $eldnah     Handle (not reference).
66     * @return  mixed
67     */
68    public function visit(
69        Visitor\Element $element,
70        &$handle = null,
71        $eldnah  = null
72    ) {
73        ++self::$_i;
74
75        $out  = str_repeat('>  ', self::$_i) . $element->getId();
76
77        if (null !== $value = $element->getValue()) {
78            $out .=
79                '(' .
80                ('default' !== $value['namespace']
81                    ? $value['namespace'] . ':'
82                    : '') .
83                $value['token'] . ', ' .
84                $value['value'] . ')';
85        }
86
87        $data = $element->getData();
88
89        if (!empty($data)) {
90            $out .= ' ' . $this->dumpData($data);
91        }
92
93        $out .= "\n";
94
95        foreach ($element->getChildren() as $child) {
96            $out .= $child->accept($this, $handle, $eldnah);
97        }
98
99        --self::$_i;
100
101        return $out;
102    }
103
104    /**
105     * Dump data.
106     *
107     * @param   mixed  $data    Data.
108     * @return  string
109     */
110    protected function dumpData($data)
111    {
112        $out = null;
113
114        if (!is_array($data)) {
115            return $data;
116        }
117
118        foreach ($data as $key => $value) {
119            $out .= '[' . $key . ' => ' . $this->dumpData($value) . ']';
120        }
121
122        return $out;
123    }
124}
125