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<?php
/**
* This file is part of phpDocumentor.
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @link http://phpdoc.org
*/
declare(strict_types=1);
namespace phpDocumentor\Reflection\Types;
use ArrayIterator;
use IteratorAggregate;
use phpDocumentor\Reflection\Type;
use function array_key_exists;
use function implode;
/**
* Base class for aggregated types like Compound and Intersection
*
* A Aggregated Type is not so much a special keyword or object reference but is a series of Types that are separated
* using separator.
*
* @psalm-immutable
* @template-implements IteratorAggregate<int, Type>
*/
abstract class AggregatedType implements Type, IteratorAggregate
{
/**
* @psalm-allow-private-mutation
* @var array<int, Type>
*/
private $types = [];
/** @var string */
private $token;
/**
* @param array<Type> $types
*/
public function __construct(array $types, string $token)
{
foreach ($types as $type) {
$this->add($type);
}
$this->token = $token;
}
/**
* Returns the type at the given index.
*/
public function get(int $index): ?Type
{
if (!$this->has($index)) {
return null;
}
return $this->types[$index];
}
/**
* Tests if this compound type has a type with the given index.
*/
public function has(int $index): bool
{
return array_key_exists($index, $this->types);
}
/**
* Tests if this compound type contains the given type.
*/
public function contains(Type $type): bool
{
foreach ($this->types as $typePart) {
// if the type is duplicate; do not add it
if ((string) $typePart === (string) $type) {
return true;
}
}
return false;
}
/**
* Returns a rendered output of the Type as it would be used in a DocBlock.
*/
public function __toString(): string
{
return implode($this->token, $this->types);
}
/**
* @return ArrayIterator<int, Type>
*/
public function getIterator(): ArrayIterator
{
return new ArrayIterator($this->types);
}
/**
* @psalm-suppress ImpureMethodCall
*/
private function add(Type $type): void
{
if ($type instanceof self) {
foreach ($type->getIterator() as $subType) {
$this->add($subType);
}
return;
}
// if the type is duplicate; do not add it
if ($this->contains($type)) {
return;
}
$this->types[] = $type;
}
}
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