Hey there,

It seems # character in string literals breaks the expression parsing but only when using double quotes as a string delimiter.

Some pseudo code to illustrate this:

$language = new ExpressionLanguage();

// throws SyntaxError exception
$language->parse('user.getGroup() in ["#good_customers", "#collaborator"]', array('user')); 

// valid
$language->parse("user.getGroup() in ['#good_customers', '#collaborator']", array('user')); 

Does the # character mean something ? Why is there a difference between single and double quoted strings ?

I did not find anything related to this in the documentation, and I think the answers to these questions have to be documented somewhere.