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Edit File: VisibilityAware.php

<?php

/**
 * This file is part of the Nette Framework (https://nette.org)
 * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 */

declare(strict_types=1);

namespace Nette\PhpGenerator\Traits;

use Nette;
use Nette\PhpGenerator\ClassType;

/**
 * @internal
 */
trait VisibilityAware
{
	/** @var string|null  public|protected|private */
	private $visibility;

/**
	 * @param  string|null  $val  public|protected|private
	 * @return static
	 */
	public function setVisibility(?string $val): self
	{
		if (!in_array($val, [ClassType::VisibilityPublic, ClassType::VisibilityProtected, ClassType::VisibilityPrivate, null], true)) {
			throw new Nette\InvalidArgumentException('Argument must be public|protected|private.');
		}

$this->visibility = $val;
		return $this;
	}

public function getVisibility(): ?string
	{
		return $this->visibility;
	}

/** @return static */
	public function setPublic(): self
	{
		$this->visibility = ClassType::VisibilityPublic;
		return $this;
	}

public function isPublic(): bool
	{
		return $this->visibility === ClassType::VisibilityPublic || $this->visibility === null;
	}

/** @return static */
	public function setProtected(): self
	{
		$this->visibility = ClassType::VisibilityProtected;
		return $this;
	}

public function isProtected(): bool
	{
		return $this->visibility === ClassType::VisibilityProtected;
	}

/** @return static */
	public function setPrivate(): self
	{
		$this->visibility = ClassType::VisibilityPrivate;
		return $this;
	}

public function isPrivate(): bool
	{
		return $this->visibility === ClassType::VisibilityPrivate;
	}
}