TempNameExpression.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\Compiler;
use Twig\Error\SyntaxError;
class TempNameExpression extends AbstractExpression {
    public const RESERVED_NAMES = [
        'varargs',
        'context',
        'macros',
        'blocks',
        'this',
    ];
    public function __construct(string|int|null $name, int $lineno) {
        // All names supported by ExpressionParser::parsePrimaryExpression() should be excluded
        if ($name && \in_array(strtolower($name), [
            'true',
            'false',
            'none',
            'null',
        ])) {
            throw new SyntaxError(\sprintf('You cannot assign a value to "%s".', $name), $lineno);
        }
        if (self::class === static::class) {
            trigger_deprecation('twig/twig', '3.15', 'The "%s" class is deprecated.', self::class);
        }
        if (null !== $name && (is_int($name) || ctype_digit($name))) {
            $name = (int) $name;
        }
        elseif (in_array($name, self::RESERVED_NAMES)) {
            $name = "͜" . $name;
        }
        parent::__construct([], [
            'name' => $name,
        ], $lineno);
    }
    public function compile(Compiler $compiler) : void {
        if (null === $this->getAttribute('name')) {
            $this->setAttribute('name', $compiler->getVarName());
        }
        $compiler->raw('$' . $this->getAttribute('name'));
    }

}