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当前路径:vendor/phpdocumentor/type-resolver/src/Types/Collection.php
<?php

declare(strict_types=1);

/**
 * 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
 */

namespace phpDocumentor\Reflection\Types;

use phpDocumentor\Reflection\Fqsen;
use phpDocumentor\Reflection\Type;

/**
 * Represents a collection type as described in the PSR-5, the PHPDoc Standard.
 *
 * A collection can be represented in two forms:
 *
 * 1. `ACollectionObject<aValueType>`
 * 2. `ACollectionObject<aValueType,aKeyType>`
 *
 * - ACollectionObject can be 'array' or an object that can act as an array
 * - aValueType and aKeyType can be any type expression
 *
 * @psalm-immutable
 */
final class Collection extends AbstractList
{
    /** @var Fqsen|null */
    private $fqsen;

    /**
     * Initializes this representation of an array with the given Type or Fqsen.
     */
    public function __construct(?Fqsen $fqsen, Type $valueType, ?Type $keyType = null)
    {
        parent::__construct($valueType, $keyType);

        $this->fqsen = $fqsen;
    }

    /**
     * Returns the FQSEN associated with this object.
     */
    public function getFqsen() : ?Fqsen
    {
        return $this->fqsen;
    }

    /**
     * Returns a rendered output of the Type as it would be used in a DocBlock.
     */
    public function __toString() : string
    {
        $objectType = (string) ($this->fqsen ?? 'object');

        if ($this->keyType === null) {
            return $objectType . '<' . $this->valueType . '>';
        }

        return $objectType . '<' . $this->keyType . ',' . $this->valueType . '>';
    }
}
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