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<?php
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/*
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* This file is part of Twig.
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*
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* (c) 2009 Fabien Potencier
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* (c) 2009 Armin Ronacher
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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class Twig_Node_Expression_Name extends Twig_Node_Expression
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{
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protected $specialVars = array(
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'_self' => '$this',
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'_context' => '$context',
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'_charset' => '$this->env->getCharset()',
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);
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public function __construct($name, $lineno)
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{
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parent::__construct(array(), array('name' => $name, 'is_defined_test' => false, 'ignore_strict_check' => false, 'always_defined' => false), $lineno);
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}
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public function compile(Twig_Compiler $compiler)
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{
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$name = $this->getAttribute('name');
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$compiler->addDebugInfo($this);
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if ($this->getAttribute('is_defined_test')) {
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if ($this->isSpecial()) {
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$compiler->repr(true);
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} else {
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$compiler->raw('array_key_exists(')->repr($name)->raw(', $context)');
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}
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} elseif ($this->isSpecial()) {
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$compiler->raw($this->specialVars[$name]);
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} elseif ($this->getAttribute('always_defined')) {
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$compiler
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->raw('$context[')
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->string($name)
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->raw(']')
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;
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} else {
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// remove the non-PHP 5.4 version when PHP 5.3 support is dropped
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// as the non-optimized version is just a workaround for slow ternary operator
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// when the context has a lot of variables
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if (PHP_VERSION_ID >= 50400) {
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// PHP 5.4 ternary operator performance was optimized
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$compiler
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->raw('(isset($context[')
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->string($name)
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->raw(']) ? $context[')
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->string($name)
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->raw('] : ')
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;
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if ($this->getAttribute('ignore_strict_check') || !$compiler->getEnvironment()->isStrictVariables()) {
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$compiler->raw('null)');
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} else {
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$compiler->raw('$this->getContext($context, ')->string($name)->raw('))');
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}
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} else {
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$compiler
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->raw('$this->getContext($context, ')
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->string($name)
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;
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if ($this->getAttribute('ignore_strict_check')) {
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$compiler->raw(', true');
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}
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$compiler
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->raw(')')
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;
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}
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}
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}
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public function isSpecial()
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{
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return isset($this->specialVars[$this->getAttribute('name')]);
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}
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public function isSimple()
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{
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return !$this->isSpecial() && !$this->getAttribute('is_defined_test');
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}
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}
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