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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DIR:/proc/self/root/opt/cpguard/app/vendor/twig/twig/src/Node/Expression/
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Current File : //proc/self/root/opt/cpguard/app/vendor/twig/twig/src/Node/Expression/FunctionExpression.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\Expression;

use Twig\Attribute\FirstClassTwigCallableReady;
use Twig\Compiler;
use Twig\Node\NameDeprecation;
use Twig\Node\Node;
use Twig\TwigFunction;

class FunctionExpression extends CallExpression implements SupportDefinedTestInterface
{
    use SupportDefinedTestDeprecationTrait;
    use SupportDefinedTestTrait;

    #[FirstClassTwigCallableReady]
    public function __construct(TwigFunction|string $function, Node $arguments, int $lineno)
    {
        if ($function instanceof TwigFunction) {
            $name = $function->getName();
        } else {
            $name = $function;
            trigger_deprecation('twig/twig', '3.12', 'Not passing an instance of "TwigFunction" when creating a "%s" function of type "%s" is deprecated.', $name, static::class);
        }

        parent::__construct(['arguments' => $arguments], ['name' => $name, 'type' => 'function'], $lineno);

        if ($function instanceof TwigFunction) {
            $this->setAttribute('twig_callable', $function);
        }

        $this->deprecateAttribute('needs_charset', new NameDeprecation('twig/twig', '3.12'));
        $this->deprecateAttribute('needs_environment', new NameDeprecation('twig/twig', '3.12'));
        $this->deprecateAttribute('needs_context', new NameDeprecation('twig/twig', '3.12'));
        $this->deprecateAttribute('arguments', new NameDeprecation('twig/twig', '3.12'));
        $this->deprecateAttribute('callable', new NameDeprecation('twig/twig', '3.12'));
        $this->deprecateAttribute('is_variadic', new NameDeprecation('twig/twig', '3.12'));
        $this->deprecateAttribute('dynamic_name', new NameDeprecation('twig/twig', '3.12'));
    }

    public function enableDefinedTest(): void
    {
        if ('constant' === $this->getAttribute('name')) {
            $this->definedTest = true;
        }
    }

    /**
     * @return void
     */
    public function compile(Compiler $compiler)
    {
        $name = $this->getAttribute('name');
        if ($this->hasAttribute('twig_callable')) {
            $name = $this->getAttribute('twig_callable')->getName();
            if ($name !== $this->getAttribute('name')) {
                trigger_deprecation('twig/twig', '3.12', 'Changing the value of a "function" node in a NodeVisitor class is not supported anymore.');
                $this->removeAttribute('twig_callable');
            }
        }

        if (!$this->hasAttribute('twig_callable')) {
            $this->setAttribute('twig_callable', $compiler->getEnvironment()->getFunction($name));
        }

        if ('constant' === $name && $this->isDefinedTestEnabled()) {
            $this->getNode('arguments')->setNode('checkDefined', new ConstantExpression(true, $this->getTemplateLine()));
        }

        $this->compileCallable($compiler);
    }
}