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

See Also

Reference

reference_wrapper Class