1. noncopyable类和copyable类
/*
* noncopyable.h
*
* Created on: 2018-6-10
* Author:
*/
#ifndef NONCOPYABLE_H_
#define NONCOPYABLE_H_
namespace ld{
class noncopyable
{
public:
noncopyable() {}
~noncopyable() {}
private: // emphasize the following members are private
noncopyable( const noncopyable& );
noncopyable& operator=( const noncopyable& );
};
class copyable // emphasize the class is copyalbe
{
};
} // end of namespace ld
#endif /* NONCOPYABLE_H_ */
2. test
#include <iostream>
#include "noncopyable.h"
class A : public ld::noncopyable
{
public:
int a=1;
};
class B : public ld::copyable
{
public:
int b=3;
};
int main()
{
std::cout<<"test noncopyable"<<std::endl;
A a;
// A a_copy = a; // 编译失败
B b;
B b_copy = b;
std::cout<<a.a/*<<a_copy.a*/<<b.b<<b_copy.b<<std::endl;
}