C++11新特性

C++11 新特性

https://harttle.land/2015/10/08/cpp11.html

C++11新特性：右值引用与move语义

https://www.tianmaying.com/tutorial/cpp11-right-value

// C++11新特性：右值引用与move语义

#include <iostream>
using namespace std;

class Person
{
public:
	Person(const char* name){
		std::cout << "Person constructor" << "\n";
		size_t len = strlen(name) + 1;
		_name = new char[len];
		memcpy(_name , name , len);
	}
	Person(const Person& p){
		std::cout << "Person copy constructor" << "\n";
		size_t len = strlen(p._name) + 1;
		_name = new char[len];
		memcpy(_name , p._name, len);
	}
	Person(Person&& per){
		std::cout << "Person move copy constructor" << "\n";
		_name = per._name;
		per._name = nullptr;
	}
	Person& operator=(const Person &per){
		std::cout << "Person copy operator" << "\n";
		size_t len = strlen(per._name) + 1;
		_name = new char [len];
		memcpy(_name , per._name , len);
		return *this;
	}
	Person& operator=(Person &&per){
		std::cout << "Person move copy operator" << "\n";
		if(_name) delete [] _name;
		_name = per._name;
		per._name = nullptr;
		return *this;
	}
	~Person(){
		std::cout << "Person distructor" << "\n";
		if(_name) delete []_name;
	}
private:
	char *	_name;
};

Person getPerson(){
	Person p("Jack");
	return p;
}

int main(int argc, char const *argv[])
{
	int c1;
	std::cout << typeid(c1).name() << "\n";
	decltype(auto) c2 = c1;
	std::cout << typeid(c2).name() << "\n";
	std::cout << "----------------------" << "\n";
	Person a = getPerson();
	std::cout << "----------------------" << "\n";
	a = getPerson();
	std::cout << "----------------------" << "\n";
	return 0;

}

C++11特性：decltype关键字

https://www.cnblogs.com/QG-whz/p/4952980.html

RVO-编译器返回值优化 - Effective C++ 20

https://blog.csdn.net/gatieme/article/details/22650353

C++ 资源大全

https://www.cplusplus.me/2182.html

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