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#include <cstdio>
#include <memory>
#include <string>
struct User {
int id = 30;
std::string name = "steph";
};
struct NodeS {
std::shared_ptr<NodeS> next;
int value;
};
int main() {
std::shared_ptr<int> sp_empty;
std::shared_ptr<int> sp_int = std::make_shared<int>(10);
std::shared_ptr<std::string> sp_str = std::make_shared<std::string>("hello");
std::shared_ptr<int> &sp_int_ref = sp_int;
std::shared_ptr<int> &&sp_int_ref_ref = std::make_shared<int>(10);
std::shared_ptr<User> sp_user = std::make_shared<User>();
std::shared_ptr<NodeS> ptr_node =
std::shared_ptr<NodeS>(new NodeS{nullptr, 2});
ptr_node = std::shared_ptr<NodeS>(new NodeS{std::move(ptr_node), 1});
// Construct empty shared_ptr with non-null control field.
std::shared_ptr<int> si(new int(47));
std::shared_ptr<int> sie(si, nullptr);
std::puts("// break here");
std::weak_ptr<int> wie = sie;
std::weak_ptr<int> wie2 = sie;
std::puts("// break here");
return 0;
}
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