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The type of a constant iterator for the controlled sequence.

typedef T1 const_iterator;

The type describes an object that can serve as a constant forward iterator for the controlled sequence. It is described here as a synonym for the implementation-defined type T1.



// std_tr1__unordered_map__unordered_multimap_const_iterator.cpp 
// compile with: /EHsc 
#include <unordered_map> 
#include <iostream> 

typedef std::unordered_multimap<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::const_iterator it = c1.begin(); 
        it != c1.end(); ++it) 
        std::cout << " [" << it->first << ", " << it->second << "]"; 
    std::cout << std::endl; 

    return (0); 

[c, 3] [b, 2] [a, 1]


Header: <unordered_map>

Namespace: std