Item 17 - shared_ptr 支援創建動態數組 (中文)

支援創建動態數組

C++11 時，std::shared_ptr 尚無支援創建動態數組，忘記的話可以看這篇

C++17 支援了，讓 std::shared_ptr 的功能變得更全面。

code

#include <iostream>
#include <memory>

class Resource {
 public:
     Resource() { std::cout << "Resource acquired : " << this << "\n"; }
     ~Resource() { std::cout << "Resource destroyed : " << this << "\n"; }
};

int main() {
    std::cout << "~Enter Scope" <<std::endl;
    {
        std::shared_ptr<Resource[]> res1 = std::make_shared<Resource[]>(3);
    }
    std::cout << "~Leave Scope" <<std::endl;
     return 0;
}

執行結果: