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POOverridden function pointer problem at template base class C++
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copied!<p>I implemented a template base class for observer pattern,</p> <pre><code>template<class T> class ActionListener { public: ActionListener(void); virtual ~ActionListener(void); void registerListener(T* listener); void unregisterListener(T* listener); template<typename Signal> void emit(Signal signal); template<typename Signal, typename Parameter> void emit(Signal signal, const Parameter& parameter); template<typename Signal, typename Parameter1, typename Parameter2> void emit(Signal signal, const Parameter1& parameter1, const Parameter2& parameter2); private: std::vector<T*> mListenerList; }; class IEventListener { public: virtual void messageArrived( Message* message); virtual void messageArrived(ClientHandle* handle, Message* message); }; </code></pre> <p>i am using classes like this</p> <pre><code>emit(&IEventListener::messageArrived, message); emit(&IEventListener::messageArrived, mHandle, message); </code></pre> <p>the problem here is, compiler cannot deduce template parameters and i couldn't gave template parameters explicitly?</p> <p>Do someone have an idea ??</p> <p>EDIT: Problem here is overridden function calling with template parameters."Emit" function works correctly for other function types.</p> <p>Usage of this pattern is </p> <pre><code>class SampleClass : public ActionListener<IEventListener> { //some stuff here //this class is observing events of IEventListener } </code></pre> <p>by the way this is C++.</p>

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