Problem mit Loki/MultiMethods.h

joomoo

Ich versuche gerade die MultiMethoden von der Loki-Lib zuverstehen, doch nun scheitere ich an ganz einfachen Sachen:

#include <iostream>
#include <Loki/MultiMethods.h>

class Base
{
};

class Derived1 : public Base
{
};

class Derived2 : public Base
{
};

class Derived3 : public Base
{
};

void d2d3(Derived2&, Derived3&)
{
    std::cout << "Hallo Derived2 und Derived3!" << std::endl;
}

void basic(Base&, Base&)
{
    std::cout << "Hallo!" << std::endl;
}

int main()
{
    Base b;
    Derived1 d1;
    Derived2 d2;
    Derived3 d3;
    Loki::BasicDispatcher<Base> d;
    d.Add<Base&, Base&>(basic);
    d.Add<Derived2&, Derived3&>(d2d3); // hier
    d.Go(d2, d3);
}

Ich bekomme folgenden Fehler:

main1.cpp:38: error: invalid conversion from `void (*)(Derived2&, Derived3&)' to `void (*)(Base&, Base&)'
main1.cpp:38: error:   initializing argument 1 of `void 
Loki::BasicDispatcher<BaseLhs, BaseRhs, ResultType, CallbackType>::Add(CallbackType) [with SomeLhs = Derived2&, SomeRhs = Derived3&,
 BaseLhs = Base, BaseRhs = Base, ResultType = void, CallbackType = void (*)(Base&, Base&)]'

Was mich sehr ägert ist, dass über die Multimethoden gar nichts in der Doku steht: http://loki-lib.sourceforge.net/html/classes.html

Woran liegt's?

mfg.