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

, 24 Feb 2011 CPOL
Module to dynamically assign, store, and call with handlers different functional objects: functors, functions, member functions.
// DynamicActionSequence.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <vector>
#include <crtdbg.h>
#include <boost/bind.hpp>
using namespace std;


class ActionInterface
{
public:
	virtual ~ActionInterface(){}

	virtual void DoAcion() = 0;
	
};

template<typename Action>
class ActionHolder : public ActionInterface
{
	Action m_Action;
public:
	ActionHolder(Action act) : m_Action(act)
	{
	}
	virtual void DoAcion()
	{		
		m_Action();
	}
};


class DynamicActionSequenceHolder
{
	vector<ActionInterface *>  m_ActionsArr;
public :
	//DynamicActionSequenceHolder(){}
	~DynamicActionSequenceHolder()
	{		
		int iSize = (int)m_ActionsArr.size();
		for(int i = 0; i < iSize; ++i)
			delete m_ActionsArr[i];

	}
	template<typename ret_type, typename Action>
	void AddActionToSequence(Action act)
	{
		m_ActionsArr.push_back(new ActionHolder<Action>(act));
	}
	void ActionSequence()
	{
		int iSize = (int)m_ActionsArr.size();
		for(int i = 0; i < iSize; ++i)
			m_ActionsArr[i]->DoAcion();
	}
};

template<typename T>
class A
{
public:
	T operator ()(T a, T b)
	{
		cout<<"Inside class A T operator ()(T a, T b)"<<endl;
		return a * b;
	}

};


class B
{
public:
	void  operator ()()
	{
		cout<<"Inside class B void  operator ()()"<<endl;
	}

};

void Func(int a, const char * pStr)
{
	cout<<"Inside void Func(int a, const char * pStr) "<<a<<" "<<pStr<<endl;
}

class C
{
public:
	void MemberFunction(int iCount,const char * pStr)
	{
		for(int i = 0; i < iCount; ++i)
			cout<<pStr;
		cout<<endl;
	}
};

int _tmain(int argc, _TCHAR* argv[])
{
	{
		DynamicActionSequenceHolder dash;		
		dash.AddActionToSequence<int>(boost::bind<int>(A<int>(), 2,3));		
		dash.AddActionToSequence<void>(B());
		dash.AddActionToSequence<void>(boost::bind<void>(Func, 55, "String"));
		C c;
		dash.AddActionToSequence<void>(boost::bind<void>(&C::MemberFunction, boost::ref(c), 3, " ! "));

		dash.ActionSequence();
	}

	if(_CrtDumpMemoryLeaks())
		cout<<"MemoryLeaks!!!"<<endl;




	return 0;
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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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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