晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //opt/cpanel/ea-wappspector/vendor/sebastian/type/src/type/IntersectionType.php
<?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 count;
use function implode;
use function in_array;
use function sort;

final class IntersectionType extends Type
{
    /**
     * @psalm-var non-empty-list<Type>
     */
    private array $types;

    /**
     * @throws RuntimeException
     */
    public function __construct(Type ...$types)
    {
        $this->ensureMinimumOfTwoTypes(...$types);
        $this->ensureOnlyValidTypes(...$types);
        $this->ensureNoDuplicateTypes(...$types);

        $this->types = $types;
    }

    public function isAssignable(Type $other): bool
    {
        return $other->isObject();
    }

    public function asString(): string
    {
        return $this->name();
    }

    public function name(): string
    {
        $types = [];

        foreach ($this->types as $type) {
            $types[] = $type->name();
        }

        sort($types);

        return implode('&', $types);
    }

    public function allowsNull(): bool
    {
        return false;
    }

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

    /**
     * @psalm-return non-empty-list<Type>
     */
    public function types(): array
    {
        return $this->types;
    }

    /**
     * @throws RuntimeException
     */
    private function ensureMinimumOfTwoTypes(Type ...$types): void
    {
        if (count($types) < 2) {
            throw new RuntimeException(
                'An intersection type must be composed of at least two types'
            );
        }
    }

    /**
     * @throws RuntimeException
     */
    private function ensureOnlyValidTypes(Type ...$types): void
    {
        foreach ($types as $type) {
            if (!$type->isObject()) {
                throw new RuntimeException(
                    'An intersection type can only be composed of interfaces and classes'
                );
            }
        }
    }

    /**
     * @throws RuntimeException
     */
    private function ensureNoDuplicateTypes(Type ...$types): void
    {
        $names = [];

        foreach ($types as $type) {
            assert($type instanceof ObjectType);

            $classQualifiedName = $type->className()->qualifiedName();

            if (in_array($classQualifiedName, $names, true)) {
                throw new RuntimeException('An intersection type must not contain duplicate types');
            }

            $names[] = $classQualifiedName;
        }
    }
}

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