- /**

- * Parses a token and returns a node.

- *

- * @param Twig_Token $token A Twig_Token instance

- *

- * @return Twig_NodeInterface A Twig_NodeInterface instance

- */

- public function parse(Twig_Token $token)

- {

- $lineno = $token->getLine();

- $expr = $this->parser->getExpressionParser()->parseExpression();

- $stream = $this->parser->getStream();

- $stream->expect(Twig_Token::BLOCK_END_TYPE);

- $body = $this->parser->subparse(array($this, 'decideIfFork'));

- $tests = array($expr, $body);

- $else = null;

- $end = false;

- while (!$end) {

- switch ($stream->next()->getValue()) {

- case 'ELSE':

- $stream->expect(Twig_Token::BLOCK_END_TYPE);

- $else = $this->parser->subparse(array($this, 'decideIfEnd'));

- break;

- case 'ELSEIF':

- $expr = $this->parser->getExpressionParser()->parseExpression();

- $stream->expect(Twig_Token::BLOCK_END_TYPE);

- $body = $this->parser->subparse(array($this, 'decideIfFork'));

- $tests[] = $expr;

- $tests[] = $body;

- break;

- case 'ENDIF':

- $end = true;

- break;

- default:

- throw new Twig_Error_Syntax(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->getFilename());

- }

- }

- $stream->expect(Twig_Token::BLOCK_END_TYPE);

- return new Twig_Node_If(new Twig_Node($tests), $else, $lineno, $this->getTag());

- }

- public function decideIfFork(Twig_Token $token)

- {

- return $token->test(array('ELSEIF', 'ELSE', 'ENDIF'));

- }

- public function decideIfEnd(Twig_Token $token)

- {

- return $token->test(array('ENDIF'));

- }

- /**

- * Gets the tag name associated with this token parser.

- *

- * @return string The tag name

- */

- public function getTag()

- {

- return 'IF';

- }