std::reference_wrapper is a class template that wraps a reference in a copy constructible and copy assignable object or reference to function of type T.
Instances of
std::reference_wrapper are objects (they can be copied or stored in containers) but they are implicitly convertible to
‘T&’ so that they can be used as arguments with the functions that take the underlying type by reference.
Syntax:
template <class T> class reference_wrapper;
template parameter(T): type of the referred element and
this can be either function or object.
Example:
Output:
geeks
