Use custom delimiters in the current Twig template - php

Question

I use Twig to generate LaTeX documents. Twig's default delimiter syntax clashes badly with LaTeX's curly braces. Simply escaping LaTeX is no option as it makes the code completely unreadable. I know I can define custom delimiters globally, but I don't want to rewrite all of my HTML templates to use the new syntax.
I also know about verbatim sections but those make the code truly ugly:
\ihead{
{% endverbatim %}
{{ title }}
{% verbatim %}
}
Is there a way I can change the syntax for just the current template or a set of templates, something like:
{% set_delimiters({
'tag_comment' : ['<%#', '%>'],
'tag_block' : ['<%' , '%>'],
'tag_variable' : ['<%=', '%>'],
'interpolation': ['#<' , '>']
}) %}

Answer 1

As you can see, it's not recommanded to use this feature Customizing the Syntax
BTW here's a quick and easy example to explain how to use custom delimiters in symfony:
service.yml
services:
templating_lexer:
public: true
parent: templating.engine.twig
class: Acme\YourBundle\Twig\TwigLexerEngine
TwigLexerEngine
namespace Acme\YourBundle\Twig;
use Symfony\Bundle\TwigBundle\TwigEngine;
class TwigLexerEngine extends TwigEngine
{
public function setTwigLexer($lexer)
{
$this->environment->setLexer($lexer);
return $this;
}
}
Your controller
public function yourAction()
{
$lexer = new \Twig_Lexer($this->get('twig'), array(
'tag_comment' => array('{*', '*}'),
'tag_block' => array('{', '}'),
'tag_variable' => array('{$', '}'),
));
$templating = $this->get('templating_lexer');
$templating->setTwigLexer($lexer);
return $templating->renderResponse('YourBundle::template.html.twig');
}