Switch tag for Twig, updated from https://github.com/fabpot/Twig/pull/185 to work with Twig >= 1.12

example.php

<?
	include_once("base/Twig/Autoloader.php");
	
	Twig_Autoloader::register();
	$loader = new Twig_Loader_Filesystem('templates');
	$twig = new Twig_Environment($loader, array());
	
	//Add the Switch token parser
	$twig->addTokenParser(new Twig_TokenParser_Switch());
?>

example.twig

{% set test = 1 %}
{% set othervar = 2 %}
{% switch test %}
	{% case 1 %}
		test is 1
	{% case 2 %}
		{% if othervar == 2 %}
			test is 2
		{% else %}
			test is 2
		{% endif %}
	{% case 0 %}
		test is 2
{% endswitch %}

Switch_Node.php

<?php

//To be added under Twig/Node/Switch.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.
 */

/**
 * Represents an if node.
 *
 * @package    twig
 * @author     Dsls
 * @author     maxgalbu
 */
class Twig_Node_Switch extends Twig_Node
{
    public function __construct(Twig_NodeInterface $value, Twig_NodeInterface $cases, Twig_NodeInterface $default = null, $lineno, $tag = null)
    {
        parent::__construct(array('value' => $value, 'cases' => $cases, 'default' => $default), array(), $lineno, $tag);
    }

    /**
     * Compiles the node to PHP.
     *
     * @param Twig_Compiler A Twig_Compiler instance
     */
    public function compile(Twig_Compiler $compiler)
    {
        $compiler->addDebugInfo($this);
		$compiler
			->write("switch (")
			->subcompile($this->getNode('value'))
			->raw(") {\n")
			->indent
		;
        for ($i = 0; $i < count($this->getNode('cases')); $i += 2) {
            $compiler
				->write('case ')
                ->subcompile($this->getNode('cases')->getNode($i))
                ->raw(":\n")
                ->indent()
                ->subcompile($this->getNode('cases')->getNode($i + 1))
                ->addIndentation()
                ->raw("break;\n")
            ;
        }

        if ($this->hasNode('default') && null !== $this->getNode('default')) {
            $compiler
                ->write("default:\n")
                ->indent()
                ->subcompile($this->getNode('default'))
                ->addIndentation()
                ->raw("break;\n")
            ;
        }

        $compiler
            ->outdent()
            ->write("}\n");
    }
}

Switch_TokenParser.php

<?php
 
//To be added under Twig/TokenParser/
 
/*
 * 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_TokenParser_Switch extends Twig_TokenParser
{
    /**
     * 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)
    {
        $parser = $this->parser;
        $stream = $parser->getStream();
        
        $default = null;
        $cases = array();
        $end = false;
        
        $name = $parser->getExpressionParser()->parseExpression();
        $stream->expect(Twig_Token::BLOCK_END_TYPE);
        $stream->expect(Twig_Token::TEXT_TYPE);
        $stream->expect(Twig_Token::BLOCK_START_TYPE);
        while (!$end)
        {
            $v = $stream->next();
            switch ($v->getValue()) {
                case 'default':
                    $stream->expect(Twig_Token::BLOCK_END_TYPE);
                    $default = $parser->subparse(array($this, 'decideIfEnd'));
                    break;
 
                case 'case':
                    $expr = $parser->getExpressionParser()->parseExpression();
                    $stream->expect(Twig_Token::BLOCK_END_TYPE);
                    $body = $parser->subparse(array($this, 'decideIfFork'));
                    $cases[] = $expr;
                    $cases[] = $body;
                    break;
 
                case 'endswitch':
                    $end = true;
                    break;
 
                default:
                    throw new Twig_Error_Syntax(sprintf('Unexpected end of template. Twig was looking for the following tags "case", "default", or "endswitch" to close the "switch" block started at line %d)', $lineno), -1);
            }
        }
 
        $stream->expect(Twig_Token::BLOCK_END_TYPE);
 
        return new Twig_Node_Switch($name,new Twig_Node($cases), $default, $token->getLine(), $this->getTag());
    }
 
    public function decideIfFork($token)
    {
        return $token->test(array('case', 'default', 'endswitch'));
    }
 
    public function decideIfEnd($token)
    {
        return $token->test(array('endswitch'));
    }
 
    /**
     * Gets the tag name associated with this token parser.
     *
     * @param string The tag name
     */
    public function getTag()
    {
        return 'switch';
    }
}

public function compile(Twig_Compiler $compiler)
{
$compiler->addDebugInfo($this);
$compiler
->write("switch (")
->subcompile($this->getNode('value'))
->raw(") {\n")
->indent
-------------------------------change to----------------------
public function compile(Twig_Compiler $compiler)
{
$compiler->addDebugInfo($this);
$compiler
->write("switch (")
->subcompile($this->getNode('value'))
->raw(") {\n")
->indent()

Twig_Node_Switch is showing a lot of errors in the latest Twig... any update on this? e.g. the constructor is incompatible with Twig_Node and ->indent is undefined. $token->test() is not defined, $lineno is not defined...

Hi,
I'm currently using your code to implement the switch tag in my template.
Now I try to adapt it to Twig 2.0, but I fail. I can not even make a trace with xDebug.
Could you help me make the code functional? And give me the elements to understand the implementation of tags, which remains to me mysterious.
i obtains an Error code 500 without anymore informations

Gilbert ARMENGAUD
(celtic34fr)
Béziers (Occitanie, France)

Hi
I try to use this node but I got an error:
Fatal error: Uncaught Error: Class 'Twig_TokenParser_Switch' not found.