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ArrayExpression.php
01 <?php
02
03 /*
04 * This file is part of Twig.
05 *
06 * (c) Fabien Potencier
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 namespace Twig\Node\Expression;
13
14 use Twig\Compiler;
15
16 class ArrayExpression extends AbstractExpression
17 {
18 private $index;
19
20 public function __construct(array $elements, int $lineno)
21 {
22 parent::__construct($elements, [], $lineno);
23
24 $this->index = -1;
25 foreach ($this->getKeyValuePairs() as $pair) {
26 if ($pair['key'] instanceof ConstantExpression && ctype_digit((string) $pair['key']->getAttribute('value')) && $pair['key']->getAttribute('value') > $this->index) {
27 $this->index = $pair['key']->getAttribute('value');
28 }
29 }
30 }
31
32 public function getKeyValuePairs()
33 {
34 $pairs = [];
35
36 foreach (array_chunk($this->nodes, 2) as $pair) {
37 $pairs[] = [
38 'key' => $pair[0],
39 'value' => $pair[1],
40 ];
41 }
42
43 return $pairs;
44 }
45
46 public function hasElement(AbstractExpression $key)
47 {
48 foreach ($this->getKeyValuePairs() as $pair) {
49 // we compare the string representation of the keys
50 // to avoid comparing the line numbers which are not relevant here.
51 if ((string) $key === (string) $pair['key']) {
52 return true;
53 }
54 }
55
56 return false;
57 }
58
59 public function addElement(AbstractExpression $value, AbstractExpression $key = null)
60 {
61 if (null === $key) {
62 $key = new ConstantExpression(++$this->index, $value->getTemplateLine());
63 }
64
65 array_push($this->nodes, $key, $value);
66 }
67
68 public function compile(Compiler $compiler)
69 {
70 $compiler->raw('[');
71 $first = true;
72 foreach ($this->getKeyValuePairs() as $pair) {
73 if (!$first) {
74 $compiler->raw(', ');
75 }
76 $first = false;
77
78 $compiler
79 ->subcompile($pair['key'])
80 ->raw(' => ')
81 ->subcompile($pair['value'])
82 ;
83 }
84 $compiler->raw(']');
85 }
86 }
87
88 class_alias('Twig\Node\Expression\ArrayExpression', 'Twig_Node_Expression_Array');
89