swap Function (unordered_multimap)

2013-02-26

Vertauscht den Inhalt von zwei Containern.

template<class Key, class Ty, class Hash, class Pred, class Alloc>
    void swap(
        unordered_multimap <Key, Ty, Hash, Pred, Alloc>& left,
        unordered_multimap <Key, Ty, Hash, Pred, Alloc>& right);

Parameter

Key
Der Schlüsseltyp.
Ty
Der zugeordnete Typ.
Hash
Der Hashfunktionsobjekttyp.
Pred
Der equality vergleichsfunktions objekttyp.
Alloc
Die allocator-Klasse.
left
Der erste auszulagern Container.
right
Der zweite auszulagern Container.

Hinweise

Die Vorlagenfunktion führt left.unordered_multimap::swap(right)aus.

Beispiel

// std_tr1__unordered_map__u_mm_swap.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; 
 
    Mymap c2; 
 
    c2.insert(Mymap::value_type('d', 4)); 
    c2.insert(Mymap::value_type('e', 5)); 
    c2.insert(Mymap::value_type('f', 6)); 
 
    c1.swap(c2); 
 
// display contents " [f 6] [e 5] [d 4]" 
    for (Mymap::const_iterator it = c1.begin(); 
        it != c1.end(); ++it) 
        std::cout << " [" << it->first << ", " << it->second << "]"; 
    std::cout << std::endl; 
 
    swap(c1, c2); 
 
// 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); 
    }