YiSignalHandlerConnection.h

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// © You i Labs Inc. 2000-2017. All rights reserved.
#ifndef _YI_SIGNAL_HANDLER_CONNECTION_H_
#define _YI_SIGNAL_HANDLER_CONNECTION_H_

#ifndef _YI_SIGNAL_H_
#error "Do not include YiSignalHandlerConnection.h directly. Include YiSignal.h instead."
#endif

#include "YiSignalBaseConnection.h"

// non-specialized concrete connection type (not defined -- only specializations are used)
template<class HandlerType, typename SlotReturnType, typename SlotTypes, typename... SignalTypes>
class CYISignalHandlerConnection;

template<class HandlerType, typename SlotReturnType, typename... SlotTypes, typename... SignalTypes>
class CYISignalHandlerConnection<HandlerType, SlotReturnType, YiSlotTypesContainer<SlotTypes...>, SignalTypes...> : public CYISignalBaseConnection<SignalTypes...>
{
public:
    typedef std::function<SlotReturnType(HandlerType &, const SlotTypes &...)> SlotType;

    CYISignalHandlerConnection(const CYISignalHandler &signalHandler, const SlotType &slot, YI_CONNECTION_TYPE connectionType, const CYISignalConnectionID &connectionID = CYISignalConnectionID::CreateUnique()) :
        CYISignalBaseConnection<SignalTypes...>(const_cast<CYISignalHandler *>(&signalHandler), connectionType, connectionID),
        m_slot(slot)
    {
    }

    virtual std::unique_ptr<CYISignalAbstractConnection> Clone(CYISignalHandler *pSignalHandler, YI_CONNECTION_TYPE eConnectionType) const override
    {
        return std::make_unique<CYISignalHandlerConnection<HandlerType, SlotReturnType, YiSlotTypesContainer<SlotTypes...>, SignalTypes...>>(*pSignalHandler, m_slot, eConnectionType, this->GetConnectionID());
    }

    virtual void Emit(const SignalTypes &... args) override
    {
        EmitInternal(args...);
    }

protected:
    const SlotType m_slot;

private:
    template<typename... ExtraTypes>
    inline void EmitInternal(const SlotTypes &... slotArgs, const ExtraTypes &...)
    {
        m_slot(static_cast<HandlerType &>(*CYISignalAbstractConnection::m_pSignalHandler), slotArgs...);
    }
};

#endif /* _YI_SIGNAL_HANDLER_CONNECTION_H_ */