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    <h3>Editing: SmartObject.php</h3>
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/**
 * 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;

use Nette\Utils\ObjectHelpers;


/**
 * Strict class for better experience.
 * - 'did you mean' hints
 * - access to undeclared members throws exceptions
 * - support for @property annotations
 * - support for calling event handlers stored in $onEvent via onEvent()
 */
trait SmartObject
{
	/**
	 * @throws MemberAccessException
	 */
	public function __call(string $name, array $args)
	{
		$class = static::class;

		if (ObjectHelpers::hasProperty($class, $name) === 'event') { // calling event handlers
			$handlers = $this-&gt;$name ?? null;
			if (is_iterable($handlers)) {
				foreach ($handlers as $handler) {
					$handler(...$args);
				}
			} elseif ($handlers !== null) {
				throw new UnexpectedValueException(&quot;Property $class::$$name must be iterable or null, &quot; . gettype($handlers) . ' given.');
			}
		} else {
			ObjectHelpers::strictCall($class, $name);
		}
	}


	/**
	 * @throws MemberAccessException
	 */
	public static function __callStatic(string $name, array $args)
	{
		ObjectHelpers::strictStaticCall(static::class, $name);
	}


	/**
	 * @return mixed
	 * @throws MemberAccessException if the property is not defined.
	 */
	public function &amp;__get(string $name)
	{
		$class = static::class;

		if ($prop = ObjectHelpers::getMagicProperties($class)[$name] ?? null) { // property getter
			if (!($prop &amp; 0b0001)) {
				throw new MemberAccessException(&quot;Cannot read a write-only property $class::\$$name.&quot;);
			}

			$m = ($prop &amp; 0b0010 ? 'get' : 'is') . ucfirst($name);
			if ($prop &amp; 0b10000) {
				$trace = debug_backtrace(0, 1)[0]; // suppose this method is called from __call()
				$loc = isset($trace['file'], $trace['line'])
					? &quot; in $trace[file] on line $trace[line]&quot;
					: '';
				trigger_error(&quot;Property $class::\$$name is deprecated, use $class::$m() method$loc.&quot;, E_USER_DEPRECATED);
			}

			if ($prop &amp; 0b0100) { // return by reference
				return $this-&gt;$m();
			} else {
				$val = $this-&gt;$m();
				return $val;
			}
		} else {
			ObjectHelpers::strictGet($class, $name);
		}
	}


	/**
	 * @param  mixed  $value
	 * @return void
	 * @throws MemberAccessException if the property is not defined or is read-only
	 */
	public function __set(string $name, $value)
	{
		$class = static::class;

		if (ObjectHelpers::hasProperty($class, $name)) { // unsetted property
			$this-&gt;$name = $value;

		} elseif ($prop = ObjectHelpers::getMagicProperties($class)[$name] ?? null) { // property setter
			if (!($prop &amp; 0b1000)) {
				throw new MemberAccessException(&quot;Cannot write to a read-only property $class::\$$name.&quot;);
			}

			$m = 'set' . ucfirst($name);
			if ($prop &amp; 0b10000) {
				$trace = debug_backtrace(0, 1)[0]; // suppose this method is called from __call()
				$loc = isset($trace['file'], $trace['line'])
					? &quot; in $trace[file] on line $trace[line]&quot;
					: '';
				trigger_error(&quot;Property $class::\$$name is deprecated, use $class::$m() method$loc.&quot;, E_USER_DEPRECATED);
			}

			$this-&gt;$m($value);

		} else {
			ObjectHelpers::strictSet($class, $name);
		}
	}


	/**
	 * @return void
	 * @throws MemberAccessException
	 */
	public function __unset(string $name)
	{
		$class = static::class;
		if (!ObjectHelpers::hasProperty($class, $name)) {
			throw new MemberAccessException(&quot;Cannot unset the property $class::\$$name.&quot;);
		}
	}


	public function __isset(string $name): bool
	{
		return isset(ObjectHelpers::getMagicProperties(static::class)[$name]);
	}
}
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