C++を勉強中・・・ orz

std::shared_ptr使っているときにthisポインタを扱いたいときは
std::enable_shared_from_this<クラス名>を継承して，
shared_from_this()を使用して取得する・・・であっているのかな・・・．

view plainprint?

1. #include <iostream>  
2. #include <memory>  
3.   
4. class Student : public std::enable_shared_from_this<Student>  
5. {  
6. public:  
7.     Student(std::string name, int first_score, int second_score)  
8.         : name_(name), first_score_(first_score),  
9.           second_score_(second_score) {}  
10.     ~Student() { std::cout << "delete " << name_ << std::endl; }  
11.   
12.     void printScore() {  
13.         std::shared_ptr<Student> ptr = shared_from_this();  
14.         std::cout << name_ << " : "  
15.                   << first_score_ + second_score_ << std::endl;  
16.     }  
17.     std::shared_ptr<Student> getSharedPointer() {  
18.         // これだとやばい・・・  
19.         // return  std::shared_ptr<Student>(this);  
20.         return  shared_from_this();  
21.     }  
22. private:  
23.     std::string name_;  
24.     int first_score_, second_score_;  
25. };  
26.   
27. int main()  
28. {  
29.     auto student = std::make_shared<Student>("Miyanaga", 5200, 24000);  
30.     auto it = student->getSharedPointer();  
31.   
32.     it->printScore();  
33.     sleep(1);  
34.   
35.     return 0;  
36. }  

#include <iostream>
#include <memory>

class Student : public std::enable_shared_from_this<Student>
{
public:
    Student(std::string name, int first_score, int second_score)
        : name_(name), first_score_(first_score),
          second_score_(second_score) {}
    ~Student() { std::cout << "delete " << name_ << std::endl; }

    void printScore() {
        std::shared_ptr<Student> ptr = shared_from_this();
        std::cout << name_ << " : "
                  << first_score_ + second_score_ << std::endl;
    }
    std::shared_ptr<Student> getSharedPointer() {
        // これだとやばい・・・
        // return  std::shared_ptr<Student>(this);
        return  shared_from_this();
    }
private:
    std::string name_;
    int first_score_, second_score_;
};

int main()
{
    auto student = std::make_shared<Student>("Miyanaga", 5200, 24000);
    auto it = student->getSharedPointer();

    it->printScore();
    sleep(1);

    return 0;
}