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NameExpression.php
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<?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; class NameExpression extends AbstractExpression { private $specialVars = [ '_self' => '$this->getTemplateName()', '_context' => '$context', '_charset' => '$this->env->getCharset()', ]; public function __construct(string $name, int $lineno) { parent::__construct([], ['name' => $name, 'is_defined_test' => false, 'ignore_strict_check' => false, 'always_defined' => false], $lineno); } public function compile(Compiler $compiler): void { $name = $this->getAttribute('name'); $compiler->addDebugInfo($this); if ($this->getAttribute('is_defined_test')) { if ($this->isSpecial()) { $compiler->repr(true); } elseif (\PHP_VERSION_ID >= 70400) { $compiler ->raw('array_key_exists(') ->string($name) ->raw(', $context)') ; } else { $compiler ->raw('(isset($context[') ->string($name) ->raw(']) || array_key_exists(') ->string($name) ->raw(', $context))') ; } } elseif ($this->isSpecial()) { $compiler->raw($this->specialVars[$name]); } elseif ($this->getAttribute('always_defined')) { $compiler ->raw('$context[') ->string($name) ->raw(']') ; } else { if ($this->getAttribute('ignore_strict_check') || !$compiler->getEnvironment()->isStrictVariables()) { $compiler ->raw('($context[') ->string($name) ->raw('] ?? null)') ; } else { $compiler ->raw('(isset($context[') ->string($name) ->raw(']) || array_key_exists(') ->string($name) ->raw(', $context) ? $context[') ->string($name) ->raw('] : (function () { throw new RuntimeError(\'Variable ') ->string($name) ->raw(' does not exist.\', ') ->repr($this->lineno) ->raw(', $this->source); })()') ->raw(')') ; } } } public function isSpecial() { return isset($this->specialVars[$this->getAttribute('name')]); } public function isSimple() { return !$this->isSpecial() && !$this->getAttribute('is_defined_test'); } }