reference_wrapper::reference_wrapper
Constructs a reference_wrapper.
explicit reference_wrapper(Ty& val);
Parameters
Ty
The type to wrap.val
The value to wrap.
Remarks
The constructor sets the stored value ptr to &val.
Example
// std_tr1__functional__reference_wrapper_reference_wrapper.cpp
// compile with: /EHsc
#include <functional>
#include <iostream>
int neg(int val)
{
return (-val);
}
int main()
{
int i = 1;
std::reference_wrapper<int> rwi(i);
std::cout << "i = " << i << std::endl;
std::cout << "rwi = " << rwi << std::endl;
rwi.get() = -1;
std::cout << "i = " << i << std::endl;
return (0);
}
i = 1 rwi = 1 i = -1
Requirements
Header: <functional>
Namespace: std