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<?php declare(strict_types = 1);

namespace PHPStan\PhpDocParser\Ast;

use function array_key_exists;

trait NodeAttributes
{

	/** @var array<string, mixed> */
	private array $attributes = [];

	/**
	 * @param mixed $value
	 */
	public function setAttribute(string $key, $value): void
	{
		if ($value === null) {
			unset($this->attributes[$key]);
			return;
		}
		$this->attributes[$key] = $value;
	}

	public function hasAttribute(string $key): bool
	{
		return array_key_exists($key, $this->attributes);
	}

	/**
	 * @return mixed
	 */
	public function getAttribute(string $key)
	{
		if ($this->hasAttribute($key)) {
			return $this->attributes[$key];
		}

		return null;
	}

}