class A
{
public:
void test() { std::cout << "test" << std::endl; }
};
class B : public A
{
public:
void test2() { std::cout << "test2" << std::endl; }
};
std::unique_ptr Get()
{
std::unique_ptr b(new B);
return b;
}
int main()
{
auto o = Get(); // 如何转换为 std::unique_ptr ?
system("pause");
return 0;
}
需取出原始指针:
B* ptr = dynamic_cast(o.get())
int main()
{
auto o = Get();
std::cout << typeid(o).name() << std::endl;
auto x = reinterpret_cast(o.release());
std::unique_ptr b(x);
std::cout << typeid(b).name() << std::endl;
system("pause");
return 0;
}
Original: https://www.cnblogs.com/bigben0123/p/15819242.html
Author: Bigben
Title: c++ 智能指针的向下转换 向下塑型 cast
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