- opBinaryParser opBinary(T rhs) 
- Undocumented in source. Be warned that the author may not have intended to support it. 
- opCallResult opCall(Token[] tokens, int pos) 
- Undocumented in source. Be warned that the author may not have intended to support it. 
Returns a successful, even if parsing failed. The unsucessful result is represented as 'null'.