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<?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, 'always_defined' => 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[$name]);
} elseif ($this->getAttribute('always_defined')) {
$compiler
->raw('$context[')
->string($name)
->raw(']')
;
} 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', '>=')) {
// 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');
}
}
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