weave arguments cannot contain )

[mikaelkaron]

At the moment data-weave is parsed using /[\s,]*(((?:\w+!)?([\w\/\.\-]+)(?:#[^(\s]+)?)(?:\((.*?)\))?)/g.

To support multiple widgets with arguments we use non-greedy matching of widget args ((?:\((.*?)\))?)), however this breaks if any widget arg contains the character ).

The fix for this would be to replace the regexp based parsing with a custom parser.