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。 sh-3ll

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Current File : //proc/self/root/opt/cpguard/app/vendor/twig/twig/src/Node/CheckToStringNode.php
<?php

/*
 * This file is part of Twig.
 *
 * (c) Fabien Potencier
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Twig\Node;

use Twig\Attribute\YieldReady;
use Twig\Compiler;
use Twig\Node\Expression\AbstractExpression;

/**
 * Checks if casting an expression to __toString() is allowed by the sandbox.
 *
 * For instance, when there is a simple Print statement, like {{ article }},
 * and if the sandbox is enabled, we need to check that the __toString()
 * method is allowed if 'article' is an object. The same goes for {{ article|upper }}
 * or {{ random(article) }}
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
#[YieldReady]
class CheckToStringNode extends AbstractExpression
{
    public function __construct(AbstractExpression $expr)
    {
        parent::__construct(['expr' => $expr], [], $expr->getTemplateLine());
    }

    public function compile(Compiler $compiler): void
    {
        $expr = $this->getNode('expr');
        $compiler
            ->raw('$this->sandbox->ensureToStringAllowed(')
            ->subcompile($expr)
            ->raw(', ')
            ->repr($expr->getTemplateLine())
            ->raw(', $this->source)')
        ;
    }
}