unary operator overloading syntax

[Robert M. Münch]

Hi, why does this work:

void* opUnary(string s)() if (s == "*"){...

but this not:

void* opUnary("*")() {...


If the first syntax is the only possible one, can I have several 
opUnary entries per struct/class or do I have to build a big switch 
inside the code section and use "s" to dispatch to correct handler?

-- 
Robert M. Münch
http://www.robertmuench.de