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Current File : /proc/thread-self/root/usr/share/php/Twig/Node//ForNode.php
<?php

/*
 * This file is part of Twig.
 *
 * (c) Fabien Potencier
 * (c) Armin Ronacher
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Twig\Node;

use Twig\Compiler;
use Twig\Node\Expression\AbstractExpression;
use Twig\Node\Expression\AssignNameExpression;

/**
 * Represents a for node.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class ForNode extends Node
{
    private $loop;

    public function __construct(AssignNameExpression $keyTarget, AssignNameExpression $valueTarget, AbstractExpression $seq, AbstractExpression $ifexpr = null, Node $body, Node $else = null, int $lineno, string $tag = null)
    {
        $body = new Node([$body, $this->loop = new ForLoopNode($lineno, $tag)]);

        if (null !== $ifexpr) {
            $body = new IfNode(new Node([$ifexpr, $body]), null, $lineno, $tag);
        }

        $nodes = ['key_target' => $keyTarget, 'value_target' => $valueTarget, 'seq' => $seq, 'body' => $body];
        if (null !== $else) {
            $nodes['else'] = $else;
        }

        parent::__construct($nodes, ['with_loop' => true, 'ifexpr' => null !== $ifexpr], $lineno, $tag);
    }

    public function compile(Compiler $compiler)
    {
        $compiler
            ->addDebugInfo($this)
            ->write("\$context['_parent'] = \$context;\n")
            ->write("\$context['_seq'] = twig_ensure_traversable(")
            ->subcompile($this->getNode('seq'))
            ->raw(");\n")
        ;

        if ($this->hasNode('else')) {
            $compiler->write("\$context['_iterated'] = false;\n");
        }

        if ($this->getAttribute('with_loop')) {
            $compiler
                ->write("\$context['loop'] = [\n")
                ->write("  'parent' => \$context['_parent'],\n")
                ->write("  'index0' => 0,\n")
                ->write("  'index'  => 1,\n")
                ->write("  'first'  => true,\n")
                ->write("];\n")
            ;

            if (!$this->getAttribute('ifexpr')) {
                $compiler
                    ->write("if (is_array(\$context['_seq']) || (is_object(\$context['_seq']) && \$context['_seq'] instanceof \Countable)) {\n")
                    ->indent()
                    ->write("\$length = count(\$context['_seq']);\n")
                    ->write("\$context['loop']['revindex0'] = \$length - 1;\n")
                    ->write("\$context['loop']['revindex'] = \$length;\n")
                    ->write("\$context['loop']['length'] = \$length;\n")
                    ->write("\$context['loop']['last'] = 1 === \$length;\n")
                    ->outdent()
                    ->write("}\n")
                ;
            }
        }

        $this->loop->setAttribute('else', $this->hasNode('else'));
        $this->loop->setAttribute('with_loop', $this->getAttribute('with_loop'));
        $this->loop->setAttribute('ifexpr', $this->getAttribute('ifexpr'));

        $compiler
            ->write("foreach (\$context['_seq'] as ")
            ->subcompile($this->getNode('key_target'))
            ->raw(' => ')
            ->subcompile($this->getNode('value_target'))
            ->raw(") {\n")
            ->indent()
            ->subcompile($this->getNode('body'))
            ->outdent()
            ->write("}\n")
        ;

        if ($this->hasNode('else')) {
            $compiler
                ->write("if (!\$context['_iterated']) {\n")
                ->indent()
                ->subcompile($this->getNode('else'))
                ->outdent()
                ->write("}\n")
            ;
        }

        $compiler->write("\$_parent = \$context['_parent'];\n");

        // remove some "private" loop variables (needed for nested loops)
        $compiler->write('unset($context[\'_seq\'], $context[\'_iterated\'], $context[\''.$this->getNode('key_target')->getAttribute('name').'\'], $context[\''.$this->getNode('value_target')->getAttribute('name').'\'], $context[\'_parent\'], $context[\'loop\']);'."\n");

        // keep the values set in the inner context for variables defined in the outer context
        $compiler->write("\$context = array_intersect_key(\$context, \$_parent) + \$_parent;\n");
    }
}

class_alias('Twig\Node\ForNode', 'Twig_Node_For');

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