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Set.php (2049B)

      1 <?php
      2 
      3 /*
      4  * This file is part of Twig.
      5  *
      6  * (c) 2009 Fabien Potencier
      7  *
      8  * For the full copyright and license information, please view the LICENSE
      9  * file that was distributed with this source code.
     10  */
     11 
     12 /**
     13  * Defines a variable.
     14  *
     15  * <pre>
     16  *  {% set foo = 'foo' %}
     17  *
     18  *  {% set foo = [1, 2] %}
     19  *
     20  *  {% set foo = {'foo': 'bar'} %}
     21  *
     22  *  {% set foo = 'foo' ~ 'bar' %}
     23  *
     24  *  {% set foo, bar = 'foo', 'bar' %}
     25  *
     26  *  {% set foo %}Some content{% endset %}
     27  * </pre>
     28  */
     29 class Twig_TokenParser_Set extends Twig_TokenParser
     30 {
     31     public function parse(Twig_Token $token)
     32     {
     33         $lineno = $token->getLine();
     34         $stream = $this->parser->getStream();
     35         $names = $this->parser->getExpressionParser()->parseAssignmentExpression();
     36 
     37         $capture = false;
     38         if ($stream->nextIf(Twig_Token::OPERATOR_TYPE, '=')) {
     39             $values = $this->parser->getExpressionParser()->parseMultitargetExpression();
     40 
     41             $stream->expect(Twig_Token::BLOCK_END_TYPE);
     42 
     43             if (count($names) !== count($values)) {
     44                 throw new Twig_Error_Syntax('When using set, you must have the same number of variables and assignments.', $stream->getCurrent()->getLine(), $stream->getFilename());
     45             }
     46         } else {
     47             $capture = true;
     48 
     49             if (count($names) > 1) {
     50                 throw new Twig_Error_Syntax('When using set with a block, you cannot have a multi-target.', $stream->getCurrent()->getLine(), $stream->getFilename());
     51             }
     52 
     53             $stream->expect(Twig_Token::BLOCK_END_TYPE);
     54 
     55             $values = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
     56             $stream->expect(Twig_Token::BLOCK_END_TYPE);
     57         }
     58 
     59         return new Twig_Node_Set($capture, $names, $values, $lineno, $this->getTag());
     60     }
     61 
     62     public function decideBlockEnd(Twig_Token $token)
     63     {
     64         return $token->test('endset');
     65     }
     66 
     67     public function getTag()
     68     {
     69         return 'set';
     70     }
     71 }