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Dynamically assigned and stored action sequence with handlers of the returned value, using boost::bind

, 24 Feb 2011 CPOL 14.9K 158 10
Module to dynamically assign, store, and call with handlers different functional objects: functors, functions, member functions.
#pragma once

#include "RetTypeSpecificator.hpp"

class ActionInterface
	virtual ~ActionInterface(){}
	virtual void DoAction() = 0;
	virtual Base_Value_Storage * ReturnValue() = 0;	

template<typename ret_type, typename Action, typename Handler >
class ActionHolder : public ActionInterface
	Action m_Action;
	Handler * m_Handler;
	bool m_bDeleteHandler;
	RetValueStorage<ret_type> m_RetValueHolder;
	ActionHolder(Action act, Handler * pHandler, bool bDeleteHandler) : m_Action(act),
		m_Handler(pHandler), m_bDeleteHandler(bDeleteHandler)
		cout<<"Inside ActionHolder. RetValueStorage<ret_type> has ID =  "<<m_RetValueHolder.m_RetType<<endl;
			delete m_Handler;
	template<typename T>	
	void CallFunctor()
		m_RetValueHolder.m_tData = m_Action();			

	void CallFunctor<void>()
	virtual void DoAction()
		// unfortunately, runtime logic hasn't authority for templates ...

		TypeDeductor<void> voidType;
		TypeDeductor<ret_type> retType;
		if(voidType == retType)
			m_RetValueHolder.m_tData = m_Action(); // here compiler becomes angry - cannot convert void to anything...
	// this is the only (maybe) decent way to return outside data returned from m_Action call; 
	// after all we must remember what return type was defined in AddActionToSequence<ret_type> call in main.
	virtual Base_Value_Storage  * ReturnValue()
		RetValueStorage<ret_type> * pRet = new RetValueStorage<ret_type>(m_RetValueHolder);
		return pRet;

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About the Author

Andriy Padalka
Software Developer (Senior)
Ukraine Ukraine
Now I'm working as a C++ developer and trainer and supporting
all my previously written applications.

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