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 : /home/rainic/www/wp-contentTZh/plugins/elementor/vendor_prefixed/twig/twig/twig/src/TokenStream.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 ElementorDeps\Twig;

use ElementorDeps\Twig\Error\SyntaxError;
/**
 * Represents a token stream.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
final class TokenStream
{
    private $tokens;
    private $current = 0;
    private $source;
    public function __construct(array $tokens, ?Source $source = null)
    {
        $this->tokens = $tokens;
        $this->source = $source ?: new Source('', '');
    }
    public function __toString()
    {
        return \implode("\n", $this->tokens);
    }
    public function injectTokens(array $tokens)
    {
        $this->tokens = \array_merge(\array_slice($this->tokens, 0, $this->current), $tokens, \array_slice($this->tokens, $this->current));
    }
    /**
     * Sets the pointer to the next token and returns the old one.
     */
    public function next() : Token
    {
        if (!isset($this->tokens[++$this->current])) {
            throw new SyntaxError('Unexpected end of template.', $this->tokens[$this->current - 1]->getLine(), $this->source);
        }
        return $this->tokens[$this->current - 1];
    }
    /**
     * Tests a token, sets the pointer to the next one and returns it or throws a syntax error.
     *
     * @return Token|null The next token if the condition is true, null otherwise
     */
    public function nextIf($primary, $secondary = null)
    {
        return $this->tokens[$this->current]->test($primary, $secondary) ? $this->next() : null;
    }
    /**
     * Tests a token and returns it or throws a syntax error.
     */
    public function expect($type, $value = null, ?string $message = null) : Token
    {
        $token = $this->tokens[$this->current];
        if (!$token->test($type, $value)) {
            $line = $token->getLine();
            throw new SyntaxError(\sprintf('%sUnexpected token "%s"%s ("%s" expected%s).', $message ? $message . '. ' : '', Token::typeToEnglish($token->getType()), $token->getValue() ? \sprintf(' of value "%s"', $token->getValue()) : '', Token::typeToEnglish($type), $value ? \sprintf(' with value "%s"', $value) : ''), $line, $this->source);
        }
        $this->next();
        return $token;
    }
    /**
     * Looks at the next token.
     */
    public function look(int $number = 1) : Token
    {
        if (!isset($this->tokens[$this->current + $number])) {
            throw new SyntaxError('Unexpected end of template.', $this->tokens[$this->current + $number - 1]->getLine(), $this->source);
        }
        return $this->tokens[$this->current + $number];
    }
    /**
     * Tests the current token.
     */
    public function test($primary, $secondary = null) : bool
    {
        return $this->tokens[$this->current]->test($primary, $secondary);
    }
    /**
     * Checks if end of stream was reached.
     */
    public function isEOF() : bool
    {
        return -1 === $this->tokens[$this->current]->getType();
    }
    public function getCurrent() : Token
    {
        return $this->tokens[$this->current];
    }
    /**
     * Gets the source associated with this stream.
     *
     * @internal
     */
    public function getSourceContext() : Source
    {
        return $this->source;
    }
}

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