<?php
/*
* This file is part of Twig.
*
* (c) 2009 Fabien Potencier
* (c) 2009 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,
), $lineno);
}
public function compile(Twig_Compiler $compiler) {
$name = $this
->getAttribute('name');
if ($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[$name]);
}
else {
// remove the non-PHP 5.4 version when PHP 5.3 support is dropped
// as the non-optimized version is just a workaround for slow ternary operator
// when the context has a lot of variables
if (version_compare(phpversion(), '5.4.0RC1', '>=') && ($this
->getAttribute('ignore_strict_check') || !$compiler
->getEnvironment()
->isStrictVariables())) {
// PHP 5.4 ternary operator performance was optimized
$compiler
->raw('(isset($context[')
->string($name)
->raw(']) ? $context[')
->string($name)
->raw('] : null)');
}
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');
}
}
Name | Description |
---|---|
Twig_Node_Expression_Name |