Method is_owner

tests/test_class_sh_unique_ptr_member.cpp:28–28

    explicit ptr_owner(std::unique_ptr<pointee> ptr) : ptr_(std::move(ptr)) {}

    bool is_owner() const { return bool(ptr_); }

    std::unique_ptr<pointee> give_up_ownership_via_unique_ptr() { return std::move(ptr_); }
    std::shared_ptr<pointee> give_up_ownership_via_shared_ptr() { return std::move(ptr_); }