--- /dev/null
+<?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.
+ */
+class Twig_Node_Expression_Name extends Twig_Node_Expression
+{
+ protected $specialVars = array(
+ '_self' => '$this',
+ '_context' => '$context',
+ '_charset' => '$this->env->getCharset()',
+ );
+
+ public function __construct($name, $lineno)
+ {
+ parent::__construct(array(), array('name' => $name, 'is_defined_test' => false, 'ignore_strict_check' => false, 'always_defined' => false), $lineno);
+ }
+
+ public function compile(Twig_Compiler $compiler)
+ {
+ $name = $this->getAttribute('name');
+
+ $compiler->addDebugInfo($this);
+
+ if ($this->getAttribute('is_defined_test')) {
+ if ($this->isSpecial()) {
+ $compiler->repr(true);
+ } else {
+ $compiler->raw('array_key_exists(')->repr($name)->raw(', $context)');
+ }
+ } elseif ($this->isSpecial()) {
+ $compiler->raw($this->specialVars[$name]);
+ } elseif ($this->getAttribute('always_defined')) {
+ $compiler
+ ->raw('$context[')
+ ->string($name)
+ ->raw(']')
+ ;
+ } else {
+ if (PHP_VERSION_ID >= 70000) {
+ // use PHP 7 null coalescing operator
+ $compiler
+ ->raw('($context[')
+ ->string($name)
+ ->raw('] ?? ')
+ ;
+
+ if ($this->getAttribute('ignore_strict_check') || !$compiler->getEnvironment()->isStrictVariables()) {
+ $compiler->raw('null)');
+ } else {
+ $compiler->raw('$this->getContext($context, ')->string($name)->raw('))');
+ }
+ } elseif (PHP_VERSION_ID >= 50400) {
+ // PHP 5.4 ternary operator performance was optimized
+ $compiler
+ ->raw('(isset($context[')
+ ->string($name)
+ ->raw(']) ? $context[')
+ ->string($name)
+ ->raw('] : ')
+ ;
+
+ if ($this->getAttribute('ignore_strict_check') || !$compiler->getEnvironment()->isStrictVariables()) {
+ $compiler->raw('null)');
+ } else {
+ $compiler->raw('$this->getContext($context, ')->string($name)->raw('))');
+ }
+ } else {
+ $compiler
+ ->raw('$this->getContext($context, ')
+ ->string($name)
+ ;
+
+ if ($this->getAttribute('ignore_strict_check')) {
+ $compiler->raw(', true');
+ }
+
+ $compiler
+ ->raw(')')
+ ;
+ }
+ }
+ }
+
+ public function isSpecial()
+ {
+ return isset($this->specialVars[$this->getAttribute('name')]);
+ }
+
+ public function isSimple()
+ {
+ return !$this->isSpecial() && !$this->getAttribute('is_defined_test');
+ }
+}