Copy elements from std::vector into std::stack c++

Question

I need to copy std::vector into std::stack.

1. Is traversing over vector and pushing into stack is only the way?

2. If there is another way what is better choice from performance point of view?

code:

 std::stack<A>   m_stack;
 std::vector<A>  m_vec;

 for (auto& elem : m_vec)
 {
    m_stack.push(elem);
 }

Answer 1

Since a stack is a container adaptor, you can create the stack from the underlying container:

std::vector<A> m_vec = /* ... */;
std::stack<A, std::vector<A>> m_stack(m_vec);

Or, if you want your stack to be deque-backed:

std::stack<A> m_stack(std::deque<A>(m_vec.begin(), m_vec.end()));