vendor/twig/twig/src/TokenParser/IfTokenParser.php line 70

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  1. <?php
  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. */
  13. namespace Twig\TokenParser;
  15. use Twig\Error\SyntaxError;
  16. use Twig\Node\IfNode;
  17. use Twig\Node\Node;
  18. use Twig\Token;
  20. /**
  21. * Tests a condition.
  22. *
  23. * {% if users %}
  24. * <ul>
  25. * {% for user in users %}
  26. * <li>{{ user.username|e }}</li>
  27. * {% endfor %}
  28. * </ul>
  29. * {% endif %}
  30. */
  31. final class IfTokenParser extends AbstractTokenParser
  32. {
  33. public function parse(Token $token)
  34. {
  35. $lineno = $token->getLine();
  36. $expr = $this->parser->getExpressionParser()->parseExpression();
  37. $stream = $this->parser->getStream();
  38. $stream->expect(/* Token::BLOCK_END_TYPE */ 3);
  39. $body = $this->parser->subparse([$this, 'decideIfFork']);
  40. $tests = [$expr, $body];
  41. $else = null;
  43. $end = false;
  44. while (!$end) {
  45. switch ($stream->next()->getValue()) {
  46. case 'else':
  47. $stream->expect(/* Token::BLOCK_END_TYPE */ 3);
  48. $else = $this->parser->subparse([$this, 'decideIfEnd']);
  49. break;
  51. case 'elseif':
  52. $expr = $this->parser->getExpressionParser()->parseExpression();
  53. $stream->expect(/* Token::BLOCK_END_TYPE */ 3);
  54. $body = $this->parser->subparse([$this, 'decideIfFork']);
  55. $tests[] = $expr;
  56. $tests[] = $body;
  57. break;
  59. case 'endif':
  60. $end = true;
  61. break;
  63. default:
  64. throw new SyntaxError(sprintf('Unexpected end of template. Twig was looking for the following tags "else", "elseif", or "endif" to close the "if" block started at line %d).', $lineno), $stream->getCurrent()->getLine(), $stream->getSourceContext());
  65. }
  66. }
  68. $stream->expect(/* Token::BLOCK_END_TYPE */ 3);
  70. return new IfNode(new Node($tests), $else, $lineno, $this->getTag());
  71. }
  73. public function decideIfFork(Token $token)
  74. {
  75. return $token->test(['elseif', 'else', 'endif']);
  76. }
  78. public function decideIfEnd(Token $token)
  79. {
  80. return $token->test(['endif']);
  81. }
  83. public function getTag()
  84. {
  85. return 'if';
  86. }
  87. }
  89. class_alias('Twig\TokenParser\IfTokenParser', 'Twig_TokenParser_If');