void reset (pointer p = pointer()) noexcept;
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void reset (nullptr_t p) noexcept;1
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// unique_ptr::reset example
#include <iostream>
#include <memory>
int main () {
std::unique_ptr<int> up; // empty
up.reset (new int); // takes ownership of pointer
*up=5;
std::cout << *up << '\n';
up.reset (new int); // deletes managed object, acquires new pointer
*up=10;
std::cout << *up << '\n';
up.reset(); // deletes managed object
return 0;
}5 10