public member function
<memory>

std::unique_ptr::get

pointer get() const noexcept;
Get pointer
Returns the stored pointer.

The stored pointer points to the object managed by the unique_ptr, if any, or to nullptr if the unique_ptr is empty.

Notice that a call to this function does not make unique_ptr release ownership of the pointer (i.e., it is still responsible for deleting the managed data at some point). Therefore, the value returned by this function shall not be used to construct a new managed pointer.

In order to obtain the stored pointer and release ownership over it, call unique_ptr::release instead.

Parameters

none

Return value

A pointer to the managed object, or a null pointer.
pointer is a member type, defined as the pointer type that points to the type of object managed.

Example

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// unique_ptr::get vs unique_ptr::release
#include <iostream>
#include <memory>

int main () {
                                           // foo   bar    p
                                           // ---   ---   ---
  std::unique_ptr<int> foo;                // null
  std::unique_ptr<int> bar;                // null  null
  int* p = nullptr;                        // null  null  null

  foo = std::unique_ptr<int>(new int(10)); // (10)  null  null
  bar = std::move(foo);                    // null  (10)  null
  p = bar.get();                           // null  (10)  (10)
  *p = 20;                                 // null  (20)  (20)
  p = nullptr;                             // null  (20)  null

  foo = std::unique_ptr<int>(new int(30)); // (30)  (20)  null
  p = foo.release();                       // null  (20)  (30)
  *p = 40;                                 // null  (20)  (40)

  std::cout << "foo: ";
  if (foo) std::cout << *foo << '\n'; else std::cout << "(null)\n";

  std::cout << "bar: ";
  if (bar) std::cout << *bar << '\n'; else std::cout << "(null)\n";

  std::cout << "p: ";
  if (p) std::cout << *p << '\n'; else std::cout << "(null)\n";
  std::cout << '\n';

  delete p;   // the program is now responsible of deleting the object pointed by p
              // bar deletes its managed object automatically

  return 0;
}


Possible output:
foo: (null)
bar: 20
p: 40

See also