change Twig concatenation delimiter

Question

twig uses ~ for its concatenation, is there any way to change this to another symbol?

I know there is a way to change other delimiters, like, the blocks, comments, etc, but I didn't find anything on concatenation. So if someone knows, that would be great!

Answer 1

For the delimeters your talking about, the TwigLexer only define this symbols:

$this->options = array_merge(array(
    'tag_comment' => array('{#', '#}'),
    'tag_block' => array('{%', '%}'),
    'tag_variable' => array('{{', '}}'),
    'whitespace_trim' => '-',
    'interpolation' => array('#{', '}'),
), $options);

As @DarkBee mentioned, you could define your own operator using https://twig.symfony.com/doc/2.x/advanced.html#operators

You can found already defined operators on this php class to help you define your own: vendor/twig/twig/lib/Twig/Extension/Core.php class Twig_Extension_Core::getOperators

Your operator would be

class Project_Twig_Extension extends Twig_Extension
{
    public function getOperators()
    {
        return array(
            array(),
            array(
               '~' => array('precedence' => 40, 'class' => 'Twig_Node_Expression_Binary_Concat', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
            ),
        );
    }

    // ...
}