EffectiveC++ Item25测试

#include <iostream>
#include<vector>
#include <string>
#include <boost/foreach.hpp>
#include <boost/shared_ptr.hpp>

using namespace std;

class Widget
{
public:
	Widget(){}
	Widget(int aData, const string &aStr):m_Data(aData), m_Str(aStr){}
	Widget(const Widget& lRhs):m_Data(lRhs.m_Data),m_Str(lRhs.m_Str)
	{
	}
	Widget& operator=(const Widget& lRhs)
	{
		m_Data = lRhs.m_Data;
		m_Str = lRhs.m_Str;
		return *this;
	}
	void swap(Widget & theOtherA)
	{
		using  std::swap;
		Widget lTemp = theOtherA;
		theOtherA = *this;
		*this = lTemp;
	}
	friend ostream& operator<<(ostream &aCout, const Widget &aWidget);
private:
	int m_Data;
	string m_Str;
};

ostream& operator<<( ostream &aCout, const Widget &aWidget )
{
	aCout << "Data: " << aWidget.m_Data 
		<< "Str: "<< aWidget.m_Str << endl;
	return aCout;
}

namespace  std
{
	template <>
	void  swap <Widget>  (Widget &  a,Widget &b)
	{
		a.swap(b);
	}
};

int main()
{
	Widget lWidget1(1,"a");
	Widget lWidget2(2,"b");
	cout << "Orgin is : " << endl 
		<< "lWidget1 :" << lWidget1 
		<< "lWidget2: "<< lWidget2;
	lWidget1.swap(lWidget2);
	cout << "After swap : " << endl 
		<< "lWidget1 :" << lWidget1 
		<< "lWidget2: "<< lWidget2;
	return 0;
}