SuperRegular expression for breaking Caché code to lexical parts. It can be improved! Supports ##class, $Method/$Var, $$MyMethod, $$$Macro, ^Global, ..ClassMethod, %SystemClass, "strings", 016175, {[()]}.

gistfile1.txt

/**
 * Function breaks code for parts with span tags and according styles, but skips &*; html-symbol combinations and tag <br>
 *
 * @param string
 *  String to parse.
 * @returns {string}
 *  Parsed string.
 */
this.highlightHTML = function(string) {
    return string.replace(/(\/\*.*?(?=\*\/)\*\/)|([0-9]+\.?[0-9]+?)|(((<|&|&#)|(\^%?)|\/|\${0,3}|#{0,2}|%|\.|(\.\.))?[A-Za-z0-9]+[;>]?)|[{}\]\[\(\)!_'\\#\?\+\-\*\/=<>,]|("[^"]*")/g,
        function(part) {
            return "<span class=\"syntax" + somePart_parsing_function(part) + "\">" + part + "</span>";
        });
};