www.aleph1.co.uk Git - yaffs-website/blob - vendor/twig/twig/lib/Twig/Node/Expression/Name.php

   1 <?php
   2
   3 /*
   4  * This file is part of Twig.
   5  *
   6  * (c) Fabien Potencier
   7  * (c) Armin Ronacher
   8  *
   9  * For the full copyright and license information, please view the LICENSE
  10  * file that was distributed with this source code.
  11  */
  12 class Twig_Node_Expression_Name extends Twig_Node_Expression
  13 {
  14     protected $specialVars = array(
  15         '_self' => '$this',
  16         '_context' => '$context',
  17         '_charset' => '$this->env->getCharset()',
  18     );
  19
  20     public function __construct($name, $lineno)
  21     {
  22         parent::__construct(array(), array('name' => $name, 'is_defined_test' => false, 'ignore_strict_check' => false, 'always_defined' => false), $lineno);
  23     }
  24
  25     public function compile(Twig_Compiler $compiler)
  26     {
  27         $name = $this->getAttribute('name');
  28
  29         $compiler->addDebugInfo($this);
  30
  31         if ($this->getAttribute('is_defined_test')) {
  32             if ($this->isSpecial()) {
  33                 $compiler->repr(true);
  34             } else {
  35                 $compiler->raw('array_key_exists(')->repr($name)->raw(', $context)');
  36             }
  37         } elseif ($this->isSpecial()) {
  38             $compiler->raw($this->specialVars[$name]);
  39         } elseif ($this->getAttribute('always_defined')) {
  40             $compiler
  41                 ->raw('$context[')
  42                 ->string($name)
  43                 ->raw(']')
  44             ;
  45         } else {
  46             if (PHP_VERSION_ID >= 70000) {
  47                 // use PHP 7 null coalescing operator
  48                 $compiler
  49                     ->raw('($context[')
  50                     ->string($name)
  51                     ->raw('] ?? ')
  52                 ;
  53
  54                 if ($this->getAttribute('ignore_strict_check') || !$compiler->getEnvironment()->isStrictVariables()) {
  55                     $compiler->raw('null)');
  56                 } else {
  57                     $compiler->raw('$this->getContext($context, ')->string($name)->raw('))');
  58                 }
  59             } elseif (PHP_VERSION_ID >= 50400) {
  60                 // PHP 5.4 ternary operator performance was optimized
  61                 $compiler
  62                     ->raw('(isset($context[')
  63                     ->string($name)
  64                     ->raw(']) ? $context[')
  65                     ->string($name)
  66                     ->raw('] : ')
  67                 ;
  68
  69                 if ($this->getAttribute('ignore_strict_check') || !$compiler->getEnvironment()->isStrictVariables()) {
  70                     $compiler->raw('null)');
  71                 } else {
  72                     $compiler->raw('$this->getContext($context, ')->string($name)->raw('))');
  73                 }
  74             } else {
  75                 $compiler
  76                     ->raw('$this->getContext($context, ')
  77                     ->string($name)
  78                 ;
  79
  80                 if ($this->getAttribute('ignore_strict_check')) {
  81                     $compiler->raw(', true');
  82                 }
  83
  84                 $compiler
  85                     ->raw(')')
  86                 ;
  87             }
  88         }
  89     }
  90
  91     public function isSpecial()
  92     {
  93         return isset($this->specialVars[$this->getAttribute('name')]);
  94     }
  95
  96     public function isSimple()
  97     {
  98         return !$this->isSpecial() && !$this->getAttribute('is_defined_test');
  99     }
 100 }