[EC++ 06] Explicityly disallow the use of compiler-generated functions you do not want.

• 방법1. member function을 private으로 선언하고 implementing을 하지 않음.
• 방법2. member function call을 막는 base class를 생성하고 이를 상속함.

	class Uncopyable {
	protected:
	Uncopyable() {};
	~Uncopyable() {};
	private:
	Uncopyable(const Uncopyable&);
	Uncopyalbe& operator=(const Uncopyable&);
	};
	class Test: private Uncopyable{
	// ...
	};

view raw ecpp5.cpp hosted with ❤ by GitHub

단, 이 경우 multiple inheritance 가 되어 empty base class optimization (Item 40) 같은 몇가지 사소한 문제를 일으킬 수 있음.

Summary

• To disallow functionality automatically provided by compilers, declare the corresponding member functions private and give no implementations. Using a base class like Uncopyable is one way to do this.

Reference

• Effective C++ by Scott Meyers