unordered_map::reference

The type of a reference to an element.

typedef Alloc::reference reference;

The type describes an object that can serve as a reference to an element of the controlled sequence.

 

// std_tr1__unordered_map__unordered_map_reference.cpp 
// compile with: /EHsc 
#include <unordered_map> 
#include <iostream> 
 
typedef std::unordered_map<char, int> Mymap; 
int main() 
    { 
    Mymap c1; 
 
    c1.insert(Mymap::value_type('a', 1)); 
    c1.insert(Mymap::value_type('b', 2)); 
    c1.insert(Mymap::value_type('c', 3)); 
 
// display contents " [c 3] [b 2] [a 1]" 
    for (Mymap::iterator it = c1.begin(); 
        it != c1.end(); ++it) 
        { 
        Mymap::reference ref = *it; 
        std::cout << " [" << ref.first << ", " << ref.second << "]"; 
        } 
    std::cout << std::endl; 
 
    return (0); 
    } 
 
 [c, 3] [b, 2] [a, 1]

Header: <unordered_map>

Namespace: std

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