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Showing content from https://cplusplus.com/reference/functional/reference_wrapper/get/ below:

public member function

<functional>

std::reference_wrapper::get 
type& get() const noexcept;

Access element

Returns a reference to the referred element.

Parameters none

Return value The referred element.

type is a member type describing the referred type (it is an alias of the class template parameter, T).



Example 
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// reference_wrapper::get
#include <iostream>     // std::cout
#include <functional>   // std::reference_wrapper

int main () {
  int i;

  std::reference_wrapper<int> foo (i);

  foo.get() = 10;

  std::cout << foo.get() << '\n';

  return 0;
}

Output:


Data races The object is accessed.
The reference returned can be used to access or modify the referred element.

Exception safetyNo-throw guarantee: this member function never throws exceptions.

See also
reference_wrapper::operator()
Access element (functional form) (public member function)
reference_wrapper::operator type&
Cast to reference (public member function)

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