IterableType.php
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IterableType.php
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	<?php declare(strict_types=1);
	/*
	* This file is part of sebastian/type.
	*
	* (c) Sebastian Bergmann <sebastian@phpunit.de>
	*
	* For the full copyright and license information, please view the LICENSE
	* file that was distributed with this source code.
	*/
	namespace SebastianBergmann\Type;

	use function assert;
	use function class_exists;
	use function is_iterable;
	use ReflectionClass;
	use ReflectionException;

	final class IterableType extends Type
	{
	/**
	* @var bool
	*/
	private $allowsNull;

	public function __construct(bool $nullable)
	{
	$this->allowsNull = $nullable;
	}

	/**
	* @throws RuntimeException
	*/
	public function isAssignable(Type $other): bool
	{
	if ($this->allowsNull && $other instanceof NullType) {
	return true;
	}

	if ($other instanceof self) {
	return true;
	}

	if ($other instanceof SimpleType) {
	return is_iterable($other->value());
	}

	if ($other instanceof ObjectType) {
	$className = $other->className()->qualifiedName();
	assert(class_exists($className));

	try {
	return (new ReflectionClass($className))->isIterable();
	// @codeCoverageIgnoreStart
	} catch (ReflectionException $e) {
	throw new RuntimeException(
	$e->getMessage(),
	(int) $e->getCode(),
	$e
	);
	// @codeCoverageIgnoreEnd
	}
	}

	return false;
	}

	public function name(): string
	{
	return 'iterable';
	}

	public function allowsNull(): bool
	{
	return $this->allowsNull;
	}

	/**
	* @psalm-assert-if-true IterableType $this
	*/
	public function isIterable(): bool
	{
	return true;
	}
	}