How can I pass std::unique_ptr into a function

Question

How can I pass a std::unique_ptr into a function? Lets say I have the following class:

class A
{
public:
    A(int val)
    {
        _val = val         


        

Answer 1

Since unique_ptr is for unique ownership, if you want to pass it as argument try

MyFunc(move(ptr));

But after that the state of ptr in main will be nullptr.