Parentheses in subexpression argument cause error

[TomKeyte]

The PHP Code:

require('./vendor/autoload.php');
use LightnCandy\LightnCandy;

// The Template:
$template = <<<VAREND
{{#each (myfunc 'foo(bar)' ) }}

{{/each}}
VAREND;

// Helpers:
$helpers = array(
  'myfunc' => function ($arg) {
    return ...;
  },
);

$phpStr = LightnCandy::compile($template, array(
  // Used compile flags
  'flags' => LightnCandy::FLAG_ERROR_EXCEPTION | LightnCandy::FLAG_HANDLEBARS,
  'helpers' => $helpers,
));

echo "Generated PHP Code:\n$phpStr\n";

// Save the compiled PHP code into a php file
file_put_contents('render.php', '<?php ' . $phpStr . '?>');

// Get the render function from the php file
$renderer = include('render.php');

echo "Result:\n" . $renderer($data);

The Issue:

If the arguments passed to a helper function which is used as a subexpression contain parentheses, the parser throws an error:

`Error in 'each (myfunc 'foo(bar)' )': expect ')' but the token ended!! No argument after {{#each}} !

Is there any way to escape them, or use a different bracket style to wrap the subexpression?