ProfilerExtension.php
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ProfilerExtension.php
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	<?php

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

	namespace Twig\Extension;

	use Twig\Profiler\NodeVisitor\ProfilerNodeVisitor;
	use Twig\Profiler\Profile;

	class ProfilerExtension extends AbstractExtension
	{
	private $actives = [];

	public function __construct(Profile $profile)
	{
	$this->actives[] = $profile;
	}

	/**
	* @return void
	*/
	public function enter(Profile $profile)
	{
	$this->actives[0]->addProfile($profile);
	array_unshift($this->actives, $profile);
	}

	/**
	* @return void
	*/
	public function leave(Profile $profile)
	{
	$profile->leave();
	array_shift($this->actives);

	if (1 === \count($this->actives)) {
	$this->actives[0]->leave();
	}
	}

	public function getNodeVisitors(): array
	{
	return [new ProfilerNodeVisitor(static::class)];
	}
	}