implicit conversions and polymorphism

Question

pretty straight-forward question, I am attempting to get an implicit conversion working with a polymorphic parameter, is there any way to get this working?

main.cpp

nickname nick("somenick");
client.send(nick_request(nick)); // original
client.send(nick); // Implicit conversion from nickname to nick_request

client.hpp

virtual void send(const request & rq)

nick_request.hpp

class nick_request : public request
{
    nick_request(const nickname & nick);
    ...
};

nickname.hpp

nickname(const std::string & name)

One solution would be to write out an overload for each type of "request", but that's tedious and defeats the point of the polymorphism.

Answer 1

You might write a conversion function (from nickname to nick_request) in nickname.

class nickname {
public:
    nickname(const std::string & name) {}
    operator nick_request() const { return nick_request(*this); }
};

LIVE

See user-defined conversion