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/BlockReferenceExpression.php
<?php

/*
 * This file is part of Twig.
 *
 * (c) Fabien Potencier
 * (c) Armin Ronacher
 *
 * 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\Compiler;
use Twig\Node\Node;

/**
 * Represents a block call node.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class BlockReferenceExpression extends AbstractExpression implements SupportDefinedTestInterface
{
    use SupportDefinedTestDeprecationTrait;
    use SupportDefinedTestTrait;

    /**
     * @param AbstractExpression $name
     */
    public function __construct(Node $name, ?Node $template, int $lineno)
    {
        if (!$name instanceof AbstractExpression) {
            trigger_deprecation('twig/twig', '3.15', 'Not passing a "%s" instance to the "node" argument of "%s" is deprecated ("%s" given).', AbstractExpression::class, static::class, $name::class);
        }

        $nodes = ['name' => $name];
        if (null !== $template) {
            $nodes['template'] = $template;
        }

        parent::__construct($nodes, ['output' => false], $lineno);
    }

    public function compile(Compiler $compiler): void
    {
        if ($this->definedTest) {
            $this->compileTemplateCall($compiler, 'hasBlock');
        } else {
            if ($this->getAttribute('output')) {
                $compiler->addDebugInfo($this);

                $compiler->write('yield from ');
                $this
                    ->compileTemplateCall($compiler, 'yieldBlock')
                    ->raw(";\n");
            } else {
                $this->compileTemplateCall($compiler, 'renderBlock');
            }
        }
    }

    private function compileTemplateCall(Compiler $compiler, string $method): Compiler
    {
        if (!$this->hasNode('template')) {
            $compiler->write('$this');
        } else {
            $compiler
                ->write('$this->load(')
                ->subcompile($this->getNode('template'))
                ->raw(', ')
                ->repr($this->getTemplateLine())
                ->raw(')')
            ;
        }

        $compiler->raw(\sprintf('->unwrap()->%s', $method));

        return $this->compileBlockArguments($compiler);
    }

    private function compileBlockArguments(Compiler $compiler): Compiler
    {
        $compiler
            ->raw('(')
            ->subcompile($this->getNode('name'))
            ->raw(', $context');

        if (!$this->hasNode('template')) {
            $compiler->raw(', $blocks');
        }

        return $compiler->raw(')');
    }
}